GE Industrial Solutions 20A Digital MicroDLynx User Manual

GE

Data Sheet

April 24, 2013

Page 1

Features

 Compliant to RoHS EU Directive 2002/95/EC (Z versions)  Compatible in a Pb-free or SnPb reflow environment (Z

versions)

 Compliant to IPC-9592 (September 2008), Category 2, Class II  DOSA based  Wide Input voltage range (3Vdc-14.4Vdc)  Output voltage programmable from 0.45Vdc to 5.5Vdc via

external resistor and PMBus

TM #

 Digital interface through the PMBus

TM #

protocol

 Tunable Loop

TM

to optimize dynamic output voltage response

 Flexible output voltage sequencing EZ-SEQUENCE  Power Good signal  Fixed switching frequency with capability of external

synchronization

 Output over current protection (non-latching)  Over temperature protection  Remote On/Off  Ability to sink and source current  Cost efficient open frame design  Small size: 20.32 mm x 11.43 mm x 8.5 mm (0.8 in x

0.45 in x 0.334 in)

 Wide operating temperature range [-40°C to 85°C]  UL* 60950-1 2

nd

Ed. Recognized, CSA† C22.2 No. 60950-1-07

Certified, and VDE‡ (EN60950-1 2nd Ed.) Licensed

 ISO** 9001 and ISO 14001 certified manufacturing facilities

Applications

 Distributed power architectures  Intermediate bus voltage applications  Telecommunications equipment  Servers and storage applications  Networking equipment  Industrial equipment

Description

The 20A Digital MicroDLynxTM power modules are non-isolated dc-dc converters that can deliver up to 20A of output current. These modules operate over a wide range of input voltage (VIN = 3Vdc-14.4Vdc) and provide a precisely regulated output voltage from 0.6Vdc to 5.5Vdc, programmable via an external resistor and PMBusTM control. Features include a digital interface using the PMBus

TM

protocol, remote On/Off, adjustable output voltage, over current and over temperature protection. The PMBus

TM #

interface supports a range of commands to both control and monitor the module. The module also includes the Tunable LoopTM feature that allows the user to optimize the dynamic response of the converter to match the load with reduced amount of output capacitance leading to savings on cost and PWB area.

* UL is a registered trademark of Underwriters Laboratories, Inc.

†

CSA is a registered trademark of Canadian Standards Association.

‡

VDE is a trademark of Verband Deutscher Elektrotechniker e.V.

** ISO is a registered trademark of the International Organization of Standards

#

The PMBus name and logo are registered trademarks of the System Management Interface Forum (SMIF)

TRIM

VOUT

VS+

GND

RTUNE

CTUNE

RTrim

VIN

Co

Cin

Vout+

Vin+

ON/OFF

SEQ

MODULE

PGOOD

SMBALRT#

SIG_GND

ADDR1

RADDR0

CLK

DATA

ADDR0

VS-

RADDR1

GND

SYNC

RoHS Compliant

20A Digital MicroDLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 20A Output Current

GE

Data Sheet

20A Digital MicroDLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 20A Output Current

April 24, 2013

Page 2

Parameter

Device

Symbol

Min

Max

Unit

Input Voltage

All

V

IN

-0.3

15

V

Continuous

SEQ, SYNC, VS+

All 7 V

CLK, DATA, SMBALERT#

All

3.6

V

Operating Ambient Temperature

All

TA -40

85

°C

(see Thermal Considerations section)

Storage Temperature

All

T

stg

-55

125

°C

Parameter

Device

Symbol

Min

Typ

Max

Unit

Operating Input Voltage

All

VIN

3  14.4

Vdc

Maximum Input Current

All

I

IN,max

19

Adc

(VIN=3V to 14V, IO=I

O, max

)

Input No Load Current (VIN = 12Vdc, IO = 0, module enabled)

V

O,set

=

0.6 Vdc

I

IN,No load

69 mA

V

O,set

=

5Vdc

I

IN,No load

134 mA

Input Stand-by Current (VIN = 12Vdc, module disabled)

All

I

IN,stand-by

16.4 mA

Inrush Transient

All

I2t

1

A2s

Input Reflected Ripple Current, peak-to-peak

(5Hz to 20MHz, 1μH source impedance; VIN =0 to 14V, IO= I

Omax

;

See Test Configurations)

All

50 mAp-p Input Ripple Rejection (120Hz)

All

-64 dB

Absolute Maximum Ratings

Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are absolute stress ratings only, functional operation of the device is not implied at these or any other conditions in excess of those given in the operations sections of the data sheet. Exposure to absolute maximum ratings for extended periods can adversely affect the device reliability.

Electrical Specifications

Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions.

GE

Data Sheet

20A Digital MicroDLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 20A Output Current

April 24, 2013

Page 3

Parameter

Device

Symbol

Min

Typ

Max

Unit

Output Voltage Set-point (with 0.1% tolerance for external resistor used to set output voltage)

All

V

O, set

-1.0 +1.0

% V

O, set

Output Voltage (Over all operating input voltage, resistive load, and temperature conditions until end of life)

All

V

O, set

-3.0  +3.0

% V

O, set

Adjustment Range (selected by an external resistor) (Some output voltages may not be possible depending on the input voltage – see Feature Descriptions Section)

All

VO 0.6 5.5

Vdc

PMBus Adjustable Output Voltage Range

All

VO,adj

-25 0 +25

%V

O,set

PMBus Output Voltage Adjustment Step Size

All

0.4

%V

O,set

Remote Sense Range

All

0.5

Vdc

Output Regulation (for VO ≥ 2.5Vdc)

Line (VIN=V

IN, min

to V

IN, max

)

All

 +0.4

% V

O, set

Load (IO=I

O, min

to I

O, max

)

All

 10

mV

Output Regulation (for VO < 2.5Vdc)

Line (VIN=V

IN, min

to V

IN, max

)

All

 5

mV

Load (IO=I

O, min

to I

O, max

)

All

 10

mV

Temperature (T

ref=TA, min

to T

A, max

)

All

 0.4

% V

O, set

Output Ripple and Noise on nominal output

(VIN=V

IN, nom

and IO=I

O, min

to I

O, max

Co = 0.1μF // 22 μF

ceramic capacitors)

Peak-to-Peak (5Hz to 20MHz bandwidth)

All

 50

100

mV

pk-pk

RMS (5Hz to 20MHz bandwidth)

All

20

38

mV

rms

External Capacitance1

Without the Tunable Loop

TM

ESR ≥ 1 mΩ

All

C

O, max

2x47  2x47

μF

With the Tunable Loop

TM

ESR ≥ 0.15 mΩ

All

C

O, max

2x47  1000

μF

ESR ≥ 10 mΩ

All

C

O, max

2x47



10000

μF

Output Current (in either sink or source mode)

All

Io 0 20

Adc

Output Current Limit Inception (Hiccup Mode) (current limit does not operate in sink mode)

All

I

O, lim

130 % I

o,max

Output Short-Circuit Current

All

I

O, s/c

1.4 Arms

(VO≤250mV) ( Hiccup Mode )

Efficiency

V

O,set

= 0.6Vdc

η 79.2 %

VIN= 12Vdc, TA=25°C

V

O, set

= 1.2Vdc

η 87.1 %

IO=I

O, max , VO

= V

O,set

V

O,set

= 1.8Vdc

η 90.4 %

V

O,set

= 2.5Vdc

η 92.6 %

V

O,set

= 3.3Vdc

η 93.8 %

V

O,set

= 5.0Vdc

η 95.2 %

Switching Frequency

All

f

sw



500  kHz

Electrical Specifications (continued)

1

External capacitors may require using the new Tunable LoopTM feature to ensure that the module is stable as well as getting the best

transient response. See the Tunable LoopTM section for details.

GE

Data Sheet

20A Digital MicroDLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 20A Output Current

April 24, 2013

Page 4

Parameter

Device

Symbol

Min

Typ

Max

Unit

Frequency Synchronization

All

Synchronization Frequency Range

All

425 600

kHz

High-Level Input Voltage

All

V

IH

2.0 V Low-Level Input Voltage

All

V

IL

0.4

V

Input Current, SYNC

All

I

SYNC

100

nA

Minimum Pulse Width, SYNC

All

t

SYNC

100

ns

Maximum SYNC rise time

All

t

SYNC_SH

100

ns

Parameter

Device

Min

Typ

Max

Unit

Calculated MTBF (IO=0.8I

O, max

, TA=40°C) Telecordia Issue 2

Method 1 Case 3

All

15,455,614

Hours

Weight

 4.54 (0.16)



g (oz.)

Parameter

Device

Symbol

Min

Typ

Max

Unit

On/Off Signal Interface

(VIN=V

IN, min

to V

IN, max

; open collector or equivalent,

Signal referenced to GND)

Device code with suffix “4” – Positive Logic (See Ordering Information)

Logic High (Module ON)

Input High Current

All

IIH  1

mA

Input High Voltage

All

VIH 2  V

IN,max

V

Logic Low (Module OFF)

Input Low Current

All

IIL



1

mA

Input Low Voltage

All

VIL -0.2  0.6

V

Device Code with no suffix – Negative Logic (See Ordering Information)

(On/OFF pin is open collector/drain logic input with

external pull-up resistor; signal referenced to GND)

Logic High (Module OFF)

Input High Current

All

IIH ― ― 1 mA

Input High Voltage

All

VIH 2 ―

V

IN, max

Vdc

Logic Low (Module ON)

Input low Current

All

IIL ― ―

10

μA

Input Low Voltage

All

VIL

-0.2 ― 0.6

Vdc

Electrical Specifications (continued)

General Specifications

Feature Specifications

Unless otherwise indicated, specifications apply overall operating input voltage, resistive load, and temperature conditions. See Feature Descriptions for additional information.

GE

Data Sheet

20A Digital MicroDLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 20A Output Current

April 24, 2013

Page 5

Parameter

Device

Symbol

Min

Typ

Max

Units

Turn-On Delay and Rise Times

(VIN=V

IN, nom

, IO=I

O, max , VO

to within ±1% of steady state)

Case 1: On/Off input is enabled and then input power is applied (delay from instant at which VIN = V

IN, min

until Vo =

10% of Vo, set)

All

Tdelay

―

1.2 ― msec

Case 2: Input power is applied for at least one second and then the On/Off input is enabled (delay from instant at which Von/Off is enabled until Vo = 10% of Vo, set)

All

Tdelay

―

0.8 ― msec

Output voltage Rise time (time for Vo to rise from 10% of Vo, set to 90% of Vo, set)

All

Trise

―

2.7 ― msec

Output voltage overshoot (TA = 25oC VIN= V

IN, min

to V

IN, max,IO

= I

O, min

to I

O, max

)

With or without maximum external capacitance

3.0

% V

O, set

Over Temperature Protection (See Thermal Considerations section)

All

T

ref

120

°C

PMBus Over Temperature Warning Threshold *

All

T

WARN

120 °C

Tracking Accuracy (Power-Up: 2V/ms)

All

VSEQ –Vo

100

mV

(Power-Down: 2V/ms)

All

VSEQ –Vo

100

mV

(V

IN, min

to V

IN, max

; I

O, min

to I

O, max

VSEQ < Vo)

Input Undervoltage Lockout

Turn-on Threshold

All

3.25

Vdc

Turn-off Threshold

All

2.6

Vdc

Hysteresis

All

0.25 Vdc

PMBus Adjustable Input Under Voltage Lockout Thresholds

All

2.5 14

Vdc

Resolution of Adjustable Input Under Voltage Threshold

All

500

mV

PGOOD (Power Good)

Signal Interface Open Drain, V

supply

 5VDC

Overvoltage threshold for PGOOD ON

All

108 %V

O, set

Overvoltage threshold for PGOOD OFF

All

105 %V

O, set

Undervoltage threshold for PGOOD ON

All

110 %V

O, set

Undervoltage threshold for PGOOD OFF

All

90 %V

O, set

Pulldown resistance of PGOOD pin

All

50



Sink current capability into PGOOD pin

All

5

mA

Feature Specifications (cont.)

* Over temperature Warning – Warning may not activate before alarm and unit may shutdown before warning

GE

Data Sheet

20A Digital MicroDLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 20A Output Current

April 24, 2013

Page 6

Parameter

Conditions

Symbol

Min

Typ

Max

Unit

PMBus Signal Interface Characteristics

Input High Voltage (CLK, DATA)

VIH

2.1 3.6 V Input Low Voltage (CLK, DATA)

VIL

0.8

V

Input high level current (CLK, DATA)

IIH

-10 10

μA

Input low level current (CLK, DATA)

IIL

-10 10

μA

Output Low Voltage (CLK, DATA, SMBALERT#)

I

OUT

=2mA

VOL

0.4

V

Output high level open drain leakage current (DATA, SMBALERT#)

V

OUT

=3.6V

I

OH

0 10

μA

Pin capacitance

CO

0.7 pF

PMBus Operating frequency range

Slave Mode

FPMB

10 400

kHz

Data hold time

Receive Mode

Transmit Mode

tHD:DAT

0

300

ns

Data setup time

tSU:DAT

250

ns

Measurement System Characteristics

Read delay time

tDLY

153

192

231

μs

Output current measurement range

I

RNG

0 26

A

Output current measurement resolution

IRES

62.5

mA

Output current measurement accuracy at 25°C (with I

OUT,

CORR

)

I

ACC

±5

%

Output current measurement offset

I

OFST

0.1 A V

OUT

measurement range

V

OUT(rng)

0 5.5

V

OUT

measurement resolution

V

OUT(res)

15.62 5

mV

V

OUT

measurement accuracy

V

OUT, ACC

-15 5

%

V

OUT

measurement offset

V

OUT(ofst)

-3 3 % VIN measurement range

V

IN(rng)

0 14.4

V

VIN measurement resolution

V

IN(res)

32.5 mV

VIN measurement accuracy

V

IN, ACC

-15 5

%

VIN measurement offset

V

IN(ofst)

-5.5

-2

1.4

LSB

Digital Interface Specifications

Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions. See Feature Descriptions for additional information.

GE

Data Sheet

20A Digital MicroDLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 20A Output Current

April 24, 2013

Page 7

EFFICIENCY,  (%)

OUTPUT CURRENT, Io (A)

OUTPUT CURRENT, IO (A)

AMBIENT TEMPERATURE, TA OC

Figure 1. Converter Efficiency versus Output Current.

Figure 2. Derating Output Current versus Ambient Temperature and Airflow.

OUTPUT VOLTAGE

V

O

(V) (10mV/div)

OUTPUT CURRENT, OUTPUT OLTAGE

I

O

(A) (10Adiv) V

O

(V) (10mV/div)

TIME, t (1s/div)

TIME, t (20s /div)

Figure 3. Typical output ripple and noise (CO=2x47μF ceramic, VIN = 12V, Io = Io,max, ).

Figure 4. Transient Response to Dynamic Load Change from 50% to 100% at 12Vin, Cout= 1x47uF +11x330uF CTune=47nF, RTune=178 ohms

OUTPUT VOLTAGE ON/OFF VOLTAGE

V

O

(V) (200mV/div) V

ON/OFF

(V) (5V/div)

OUTPUT VOLTAGE INPUT VOLTAGE

V

O

(V) (200mV/div) V

IN

(V) (5V/div)

TIME, t (2ms/div)

Figure 5. Typical Start-up Using On/Off Voltage (Io = Io,max).

Figure 6. Typical Start-up Using Input Voltage (VIN = 12V, Io = Io,max).

50

55

60

65

70

75

80

85

90

0 5 10 15 20

Vin=3.3V

Vin=14V

Vin=12V

2

6

10

14

18

22

55 65 75 85 95 105

0.5m/s

(100LFM)

1.5m/s

(300LFM)

1m/s

(200LFM)

NC

2m/s

(400LFM)

Characteristic Curves

The following figures provide typical characteristics for the 20A Digital MicroDLynxTM at 0.6Vo and 25oC.

GE

Data Sheet

20A Digital MicroDLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 20A Output Current

April 24, 2013

Page 8

EFFICIENCY,  (%)

OUTPUT CURRENT, Io (A)

OUTPUT CURRENT, IO (A)

AMBIENT TEMPERATURE, TA OC

Figure 7. Converter Efficiency versus Output Current.

Figure 8. Derating Output Current versus Ambient Temperature and Airflow.

OUTPUT VOLTAGE

V

O

(V) (20mV/div)

OUTPUT CURRENT, OUTPUT VOLTAGE

I

O

(A) (10Adiv) V

O

(V) (20mV/div)

TIME, t (1s/div)

TIME, t (20s /div)

Figure 9. Typical output ripple and noise (CO=2x47μF ceramic, VIN = 12V, Io = Io,max, ).

Figure 10. Transient Response to Dynamic Load Change from 50% to 100% at 12Vin, Cout= 1x47uF +5x330uF, CTune=10nF & RTune=178 ohms

OUTPUT VOLTAGE ON/OFF VOLTAGE

V

O

(V) (500mV/div) V

ON/OFF

(V) (5V/div)

OUTPUT VOLTAGE INPUT VOLTAGE

V

O

(V) (500mV/div) V

IN

(V) (5V/div)

TIME, t (2ms/div)

Figure 11. Typical Start-up Using On/Off Voltage (Io = Io,max).

Figure 12. Typical Start-up Using Input Voltage (VIN = 12V, Io = Io,max).

50

55

60

65

70

75

80

85

90

95

0 5 10 15 20

Vin=3.3V

Vin=14V

Vin=12V

2

6

10

14

18

22

55 65 75 85 95 105

2m/s

(400LFM)

1.5m/s

(300LFM)

1m/s

(200LFM)

0.5m/s

(100LFM)

NC

Characteristic Curves

The following figures provide typical characteristics for the 20A Digital MicroDLynxTM at 1.2Vo and 25oC.

GE

Data Sheet

20A Digital MicroDLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 20A Output Current

April 24, 2013

Page 9

EFFICIENCY,  (%) OUTPUT CURRENT, Io (A)

OUTPUT CURRENT, IO (A)

AMBIENT TEMPERATURE, TA OC

Figure 13. Converter Efficiency versus Output Current.

Figure 14. Derating Output Current versus Ambient Temperature and Airflow.

OUTPUT VOLTAGE

V

O

(V) (20mV/div)

OUTPUT CURRENT, OUTPUT VOLTAGE

I

O

(A) (10Adiv) V

O

(V) (20mV/div)

TIME, t (1s/div)

TIME, t (20s /div)

Figure 15. Typical output ripple and noise (CO=2X47μF ceramic, VIN = 12V, Io = Io,max, ).

Figure 16. Transient Response to Dynamic Load Change from 50% to 100% at 12Vin, Cout= 2x47uF +3x330uF, CTune=5600pF & RTune=220 ohms

OUTPUT VOLTAGE ON/OFF VOLTAGE

V

O

(V) (500mV/div) V

ON/OFF

(V) 5V/div)

OUTPUT VOLTAGE INPUT VOLTAGE

V

O

(V) (500mV/div) V

IN

(V) (5V/div)

TIME, t (2ms/div)

Figure 17. Typical Start-up Using On/Off Voltage (Io = Io,max).

Figure 18. Typical Start-up Using Input Voltage (VIN = 12V, Io = Io,max).

70

75

80

85

90

95

0 5 10 15 20

Vin=3.3V

Vin=14V

Vin=12V

2

6

10

14

18

22

55 65 75 85 95 105

2m/s

(400LFM)

1.5m/s

(300LFM)

1m/s

(200LFM)

0.5m/s

(100LFM)

NC

Characteristic Curves

The following figures provide typical characteristics for the 20A Digital MicroDLynxTM at 1.8Vo and 25oC.

GE

Data Sheet

20A Digital MicroDLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 20A Output Current

April 24, 2013

Page 10

EFFICIENCY,  (%)

OUTPUT CURRENT, Io (A)

OUTPUT CURRENT, IO (A)

AMBIENT TEMPERATURE, TA OC

Figure 19. Converter Efficiency versus Output Current.

Figure 20. Derating Output Current versus Ambient Temperature and Airflow.

OUTPUT VOLTAGE

V

O

(V) (20mV/div)

OUTPUT CURRENT, OUTPUT VOLTAGE

I

O

(A) (10Adiv) V

O

(V) (20mV/div)

TIME, t (1s/div)

TIME, t (20s /div)

Figure 21. Typical output ripple and noise (CO=2x47μF ceramic, VIN = 12V, Io = Io,max, ).

Figure 22. Transient Response to Dynamic Load Change from 50% to 100% at 12Vin, Cout= 2x47uF +2x330uF, CTune=3300pF & RTune=220 ohms

OUTPUT VOLTAGE ON/OFF VOLTAGE

V

O

(V) (1V/div) V

ON/OFF

(V) (5V/div)

OUTPUT VOLTAGE INPUT VOLTAGE

V

O

(V) (1V/div) V

IN

(V) (5V/div)

TIME, t (2ms/div)

Figure 23. Typical Start-up Using On/Off Voltage (Io = Io,max).

Figure 24. Typical Start-up Using Input Voltage (VIN = 12V, Io = Io,max).

70

75

80

85

90

95

100

0 5 10 15 20

Vin=4.5V

Vin=14V

Vin=12V

2

6

10

14

18

22

55 65 75 85 95 105

2m/s

(400LFM)

1.5m/s

(300LFM)

1m/s

(200LFM)

0.5m/s

(100LFM)

NC

Characteristic Curves

The following figures provide typical characteristics for the 20A Digital MicroDLynxTM at 2.5Vo and 25oC.

GE

Data Sheet

20A Digital MicroDLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 20A Output Current

April 24, 2013

Page 11

EFFICIENCY,  (%)

OUTPUT CURRENT, Io (A)

OUTPUT CURRENT, IO (A)

AMBIENT TEMPERATURE, TA OC

Figure 25. Converter Efficiency versus Output Current.

Figure 26. Derating Output Current versus Ambient Temperature and Airflow.

OUTPUT VOLTAGE

V

O

(V) (50mV/div)

OUTPUT CURRENT, OUTPUT VOLTAGE

I

O

(A) (10Adiv) V

O

(V) (50mV/div)

TIME, t (1s/div)

TIME, t (20s /div)

Figure 27. Typical output ripple and noise (CO=2x47μF ceramic, VIN = 12V, Io = Io,max, ).

Figure 28 Transient Response to Dynamic Load Change from 50% to 100% at 12Vin, Cout= 5x47uF +1x330uF, CTune=2200pF & RTune=220 ohms

OUTPUT VOLTAGE ON/OFF VOLTAGE

V

O

(V) (1V/div) V

ON/OFF

(V) (5V/div)

OUTPUT VOLTAGE INPUT VOLTAGE

V

O

(V) (1V/div) V

IN

(V) (5V/div)

TIME, t (2ms/div)

Figure 29. Typical Start-up Using On/Off Voltage (Io = Io,max).

Figure 30. Typical Start-up Using Input Voltage (VIN = 12V, Io = Io,max).

70

75

80

85

90

95

100

0 5 10 15 20

Vin=4.5V

Vin=14V

Vin=12V

2

6

10

14

18

22

55 65 75 85 95 105

2m/s

(400LFM)

1.5m/s

(300LFM)

1m/s

(200LFM)

0.5m/s

(100LFM)

NC

2m/s

(400LFM)

1.5m/s

(300LFM)

1m/s

(200LFM)

0.5m/s

(100LFM)

NC

Characteristic Curves

The following figures provide typical characteristics for the 20A Digital MicroDLynxTM at 3.3Vo and 25oC.

GE

Data Sheet

20A Digital MicroDLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 20A Output Current

April 24, 2013

Page 12

EFFICIENCY,  (%) OUTPUT CURRENT, Io (A)

OUTPUT CURRENT, IO (A)

AMBIENT TEMPERATURE, TA OC

Figure 31. Converter Efficiency versus Output Current.

Figure 32. Derating Output Current versus Ambient Temperature and Airflow.

OUTPUT VOLTAGE

V

O

(V) (50mV/div)

OUTPUT CURRENT, OUTPUT VOLTAGE

I

O

(A) (10Adiv) V

O

(V) (50mV/div)

TIME, t (1s/div)

TIME, t (20s /div)

Figure 33. Typical output ripple and noise (CO=2x47μF ceramic, VIN = 12V, Io = Io,max, ).

Figure 34. Transient Response to Dynamic Load Change from 50% to 100% at 12Vin, Cout= 8x47uF, CTune=1500pF & RTune=220 ohms

OUTPUT VOLTAGE ON/OFF VOLTAGE

V

O

(V) (2V/div) V

ON/OFF

(V) (5V/div)

OUTPUT VOLTAGE INPUT VOLTAGE

V

O

(V) (2V/div) V

IN

(V) (5V/div)

TIME, t (2ms/div)

Figure 35. Typical Start-up Using On/Off Voltage (Io = Io,max).

Figure 36. Typical Start-up Using Input Voltage (VIN = 12V, Io = Io,max).

70

75

80

85

90

95

100

0 5 10 15 20

Vin=7V

Vin=12V

Vin=14V

2

6

10

14

18

22

55 65 75 85 95 105

2m/s

(400LFM)

1.5m/s

(300LFM)

1m/s

(200LFM)

0.5m/s

(100LFM)

NC

Characteristic Curves

The following figures provide typical characteristics for the 20A Digital MicroDLynxTM at 5Vo and 25oC.

GE

Data Sheet

20A Digital MicroDLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 20A Output Current

April 24, 2013

Page 13

Input Ripple Voltage (mVp-p)

Output Voltage (Vdc)

0

50

100

150

200

250

300

350

400

450

0.5 1 1.5 2 2.5 3 3.5 4 4.5 5

2x22uF 3x22 uF

0

10

20

30

40

50

60

70

0.5 1 1.5 2 2.5 3 3.5 4 4.5 5

Ripple (mVp-p)

Output Voltage(Volts)

2x47uF Ext Cap 4x47uF Ext Cap 6x47uF Ext Cap 8x47uF Ext Cap

Design Considerations

Input Filtering

The 20A Digital MicroDLynxTM module should be connected to a low ac-impedance source. A highly inductive source can affect the stability of the module. An input capacitance must be placed directly adjacent to the input pin of the module, to minimize input ripple voltage and ensure module stability.

To minimize input voltage ripple, ceramic capacitors are recommended at the input of the module. Figure 37 shows the input ripple voltage for various output voltages at 20A of load current with 2x22 µF or 3x22 µF ceramic capacitors and an input of 12V.

Figure 38. Output ripple voltage for various output voltages with external 2x47 µF, 4x47 µF or 6x47 µF ceramic capacitors at the output (20A load). Input voltage is 12V.

Safety Considerations

For safety agency approval the power module must be installed in compliance with the spacing and separation requirements of the end-use safety agency standards, i.e., UL 60950-1 2nd, CSA C22.2 No. 60950-1-07, DIN EN 609501:2006 + A11 (VDE0805 Teil 1 + A11):2009-11; EN 609501:2006 + A11:2009-03.

Figure 37. Input ripple voltage for various output voltages with 2x22 µF or 3x22 µF ceramic capacitors at the input (20A load). Input voltage is 12V.

Output Filtering

These modules are designed for low output ripple voltage and will meet the maximum output ripple specification with

0.1 µF ceramic and 2x47 µF ceramic capacitors at the output of the module. However, additional output filtering may be required by the system designer for a number of reasons. First, there may be a need to further reduce the output ripple and noise of the module. Second, the dynamic response characteristics may need to be customized to a particular load step change.

To reduce the output ripple and improve the dynamic response to a step load change, additional capacitance at the output can be used. Low ESR polymer and ceramic capacitors are recommended to improve the dynamic response of the module. Figure 38 provides output ripple information for different external capacitance values at various Vo and a full load current of 20A. For stable operation of the module, limit the capacitance to less than the maximum output capacitance as specified in the electrical specification table. Optimal performance of the module can be achieved by using the Tunable LoopTM feature described later in this data sheet.

For the converter output to be considered meeting the requirements of safety extra-low voltage (SELV), the input must meet SELV requirements. The power module has extra-low voltage (ELV) outputs when all inputs are ELV.

The UDT020A0X series were tested using an external Littelfuse 456 series fast-acting fuse rated at 30 A, 100 Vdc in the ungrounded input.

GE

Data Sheet

20A Digital MicroDLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 20A Output Current

April 24, 2013

Page 14

20K

Rpullup

I

20K

ON/OFF

+

20K

3.3V

470

VIN

20K

Q7

20K

100pF

4.7K

ENABLE

100K

DLYNX MODULE

47K

Q2

+VIN

20K

GND

20K

2K

ON/OFF

Q6

Q5

V

Q3

_

ENABLE

470

4.7K

+VIN

20K

100K

2K

100pF

_

47K

GND

Q6

20K

Q2

+

DLYNX MODULE

V

Rpullup

Q3

ON/OFF

20K

I

ON/OFF

3.3V

Q5

20K

Analog Feature Descriptions

Remote On/Off

Digital On/Off

Please see the Digital Feature Descriptions section.

The module can be turned ON and OFF either by using the ON/OFF pin (Analog interface) or through the PMBus interface (Digital). The module can be configured in a number of ways through the PMBus interface to react to the two ON/OFF inputs:

 Module ON/OFF can be controlled only through

the analog interface (digital interface ON/OFF commands are ignored)

 Module ON/OFF can be controlled only through

the PMBus interface (analog interface is ignored)

 Module ON/OFF can be controlled by either the

analog or digital interface

Figure 39. Circuit configuration for using positive On/Off logic.

The default state of the module (as shipped from the factory) is to be controlled by the analog interface only. If the digital interface is to be enabled, or the module is to be controlled only through the digital interface, this change must be made through the PMBus. These changes can be made and written to non-volatile memory on the module so that it is remembered for subsequent use.

Analog On/Off

The 20A Digital MicroDLynxTM power modules feature an On/Off pin for remote On/Off operation. Two On/Off logic options are available. In the Positive Logic On/Off option, (device code suffix “4” – see Ordering Information), the module turns ON during a logic High on the On/Off pin and turns OFF during a logic Low. With the Negative Logic On/Off option, (no device code suffix, see Ordering Information), the module turns OFF during logic High and ON during logic Low. The On/Off signal should be always referenced to ground. For either On/Off logic option, leaving the On/Off pin disconnected will turn the module ON when input voltage is present.

For positive logic modules, the circuit configuration for using the On/Off pin is shown in Figure 39. When the external transistor Q2 is in the OFF state, the internal transistor Q7 is turned ON, which turn Q3 OFF which keeps Q6 OFF and Q5 OFF. This allows the internal PWM #Enable signal to be pulled up by the internal 3.3V, thus turning the module ON. When transistor Q2 is turned ON, the On/Off pin is pulled low, which turns Q7 OFF which turns Q3, Q6 and Q5 ON and the internal PWM #Enable signal is pulled low and the module is OFF. A suggested value for R

pullup

is 20k.

For negative logic On/Off modules, the circuit configuration is shown in Fig. 40. The On/Off pin should be pulled high with an external pull-up resistor (suggested value for the 3V to 14V input range is 20Kohms). When transistor Q2 is in the OFF state, the On/Off pin is pulled high, transistor Q3 is turned ON. This turns Q6 ON, followed by Q5 turning ON which pulls the internal ENABLE low and the module is OFF. To turn the module ON, Q2 is turned ON pulling the On/Off pin low, turning transistor Q3 OFF, which keeps Q6 and Q5 OFF resulting in the PWM Enable pin going high.

Figure 40. Circuit configuration for using negative On/Off logic.

Monotonic Start-up and Shutdown

The module has monotonic start-up and shutdown behavior for any combination of rated input voltage, output current and operating temperature range.

Startup into Pre-biased Output

The module can start into a prebiased output as long as the prebias voltage is 0.5V less than the set output voltage.

Analog Output Voltage Programming

The output voltage of the module is programmable to any voltage from 0.6dc to 5.5Vdc by connecting a resistor between the Trim and SIG_GND pins of the module. Certain restrictions apply on the output voltage set point depending on the input voltage. These are shown in the Output Voltage vs. Input Voltage Set Point Area plot in Fig. 41. The Upper Limit curve shows that for output voltages lower than 1V, the input voltage must be lower than the maximum of

14.4V. The Lower Limit curve shows that for output voltages higher than 0.6V, the input voltage needs to be larger than

GE

Data Sheet

20A Digital MicroDLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 20A Output Current

April 24, 2013

Page 15

V

O

(+)

TRIM

VS─

R

trim

LOAD

V

IN

(+)

ON/OFF

VS+

SIG_GND

 



 



 





 k

Vo

Rtrim

6.0

12

V

O, set

(V)

Rtrim (KΩ)

0.6

Open

0.9

40

1.0

30

1.2

20

1.5

13.33

1.8

10

2.5

6.316

3.3

4.444

5.0

2.727

0

2

4

6

8

10

12

14

16

0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6

Input Voltage (v)

Output Voltage (V)

Lower

Upper

Vo

MODULE

SIG_GND

Trim

Q1

Rtrim

Rmargin-up

Q2

Rmargin-down

the minimum of 3V. .

Figure 41. Output Voltage vs. Input Voltage Set Point Area plot showing limits where the output voltage can be set for different input voltages.

Table 1

Digital Output Voltage Adjustment

Please see the Digital Feature Descriptions section.

Remote Sense

The power module has a Remote Sense feature to minimize the effects of distribution losses by regulating the voltage between the sense pins (VS+ and VS-). The voltage drop between the sense pins and the VOUT and GND pins of the module should not exceed 0.5V.

Analog Voltage Margining

Output voltage margining can be implemented in the module by connecting a resistor, R to the ground pin for margining-up the output voltage and by connecting a resistor, R output pin for margining-down. Figure 43 shows the circuit configuration for output voltage margining. The POL

Caution – Do not connect SIG_GND to GND elsewhere in the layout

Figure 42. Circuit configuration for programming output

Programming Tool, available at www.lineagepower.com under the Downloads section, also calculates the values of R

margin-up

and R

margin-down

for a specific output voltage and % margin. Please consult your local Lineage Power technical representative for additional details.

voltage using an external resistor.

Without an external resistor between Trim and SIG_GND pins, the output of the module will be 0.6Vdc. To calculate the value of the trim resistor, Rtrim for a desired output voltage, should be as per the following equation:

Rtrim is the external resistor in kΩ

Vo is the desired output voltage.

Table 1 provides Rtrim values required for some common output voltages.

Figure 43. Circuit Configuration for margining Output voltage.

margin-down

, from the Trim pin

margin-up

, from the Trim pin to

GE

Data Sheet

20A Digital MicroDLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 20A Output Current

April 24, 2013

Page 16

100 pF

DLynx Module

R1=Rtrim

20K

SIG_GND

SEQ

V

Digital Output Voltage Margining

Please see the Digital Feature Descriptions section.

Output Voltage Sequencing

The power module includes a sequencing feature, EZSEQUENCE that enables users to implement various types of output voltage sequencing in their applications. This is accomplished via an additional sequencing pin. When not using the sequencing feature, leave it unconnected.

The voltage applied to the SEQ pin should be scaled down by the same ratio as used to scale the output voltage down to the reference voltage of the module. This is accomplished by an external resistive divider connected across the sequencing voltage before it is fed to the SEQ pin as shown in Fig. 44. In addition, a small capacitor (suggested value 100pF) should be connected across the lower resistor R1.

For all DLynx modules, the minimum recommended delay between the ON/OFF signal and the sequencing signal is 10ms to ensure that the module output is ramped up according to the sequencing signal. This ensures that the module soft-start routine is completed before the sequencing signal is allowed to ramp up.

continue operation without interruption as the response to this fault (see the description of the PMBus command VOUT_UV_FAULT_RESPONSE for additional information).

Overcurrent Protection

To provide protection in a fault (output overload) condition, the unit is equipped with internal current-limiting circuitry and can endure current limiting continuously. At the point of current-limit inception, the unit enters hiccup mode. The unit operates normally once the output current is brought back into its specified range.

Digital Adjustable Overcurrent Warning

Please see the Digital Feature Descriptions section.

Overtemperature Protection

To provide protection in a fault condition, the unit is equipped with a thermal shutdown circuit. The unit will shut down if the overtemperature threshold of 120oC(typ) is exceeded at the thermal reference point T goes into thermal shutdown it will then wait to cool before attempting to restart.

.Once the unit

ref

Digital Temperature Status via PMBus

Please see the Digital Feature Descriptions section.

Digitally Adjustable Output Over and Under Voltage Protection

Please see the Digital Feature Descriptions section.

Figure 44. Circuit showing connection of the sequencing signal to the SEQ pin.

When the scaled down sequencing voltage is applied to the SEQ pin, the output voltage tracks this voltage until the output reaches the set-point voltage. The final value of the sequencing voltage must be set higher than the set-point voltage of the module. The output voltage follows the sequencing voltage on a one-to-one basis. By connecting multiple modules together, multiple modules can track their output voltages to the voltage applied on the SEQ pin.

To initiate simultaneous shutdown of the modules, the SEQ pin voltage is lowered in a controlled manner. The output voltage of the modules tracks the voltages below their setpoint voltages on a one-to-one basis. A valid input voltage must be maintained until the tracking and output voltages reach ground potential.

Note that in all digital DLynx series of modules, the PMBus Output Undervoltage Fault will be tripped when sequencing is employed. This will be detected using the STATUS_WORD and STATUS_VOUT PMBus commands. In addition, the SMBALERT# signal will be asserted low as occurs for all faults and warnings. To avoid the module shutting down due to the Output Undervoltage Fault, the module must be set to

Input Undervoltage Lockout

At input voltages below the input undervoltage lockout limit, the module operation is disabled. The module will begin to operate at an input voltage above the undervoltage lockout turn-on threshold.

Digitally Adjustable Input Undervoltage Lockout

Please see the Digital Feature Descriptions section.

Digitally Adjustable Power Good Thresholds

Please see the Digital Feature Descriptions section.

GE

Data Sheet

20A Digital MicroDLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 20A Output Current

April 24, 2013

Page 17

MODULE

SYNC

GND

+

─

Synchronization

The module switching frequency can be synchronized to a signal with an external frequency within a specified range. Synchronization can be done by using the external signal applied to the SYNC pin of the module as shown in Fig. 45, with the converter being synchronized by the rising edge of the external signal. The Electrical Specifications table specifies the requirements of the external SYNC signal. If the SYNC pin is not used, the module should free run at the default switching frequency. If synchronization is not being

used, connect the SYNC pin to GND.

Figure 45. External source connections to synchronize switching frequency of the module.

Measuring Output Current, Output Voltage and Input Voltage

Please see the Digital Feature Descriptions section.

Dual Layout

Identical dimensions and pin layout of Analog and Digital MicroDLynx modules permit migration from one to the other without needing to change the layout. In both cases the trim resistor is connected between trim and signal ground. The output of the analog module cannot be trimmed down to

0.45V

Power Good

The module provides a Power Good (PGOOD) signal that is implemented with an open-drain output to indicate that the output voltage is within the regulation limits of the power module. The PGOOD signal will be de-asserted to a low state if any condition such as overtemperature, overcurrent or loss of regulation occurs that would result in the output voltage going ±10% outside the setpoint value. The PGOOD terminal can be connected through a pullup resistor (suggested value 100K) to a source of 5VDC or lower.

GE

Data Sheet

20A Digital MicroDLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 20A Output Current

April 24, 2013

Page 18

Co

2x47F

4x47F

6x47F

10x47F

20x47F

R

TUNE

330

270

220

180

C

TUNE

47pF

560pF

1200pF

2200pF

4700pF

Vo

5V

3.3V

2.5V

1.8V

1.2V

0.6V

Co

8x47F

5x47F +

1x330F

Polymer

2x47F

+

2x330F

Polymer

2x47F

+

3x330F

Polymer

1x47F

+

5x330F

Polymer

1x47F

+

11x330F

Polymer

R

TUNE

220

180

C

TUNE

1500pF

2200pF

3300pF

5600pF

10nF

47nF

V

100mV

64mV

49mV

36mV

24mV

12mV

VS+

MODULE

SIG_GND

TRIM

VOUT

RTune

CTune

RTrim

CO

GND

Tunable Loop

The module has a feature that optimizes transient response of the module called Tunable LoopTM.

External capacitors are usually added to the output of the module for two reasons: to reduce output ripple and noise (see Figure 38) and to reduce output voltage deviations from the steady-state value in the presence of dynamic load current changes. Adding external capacitance however affects the voltage control loop of the module, typically causing the loop to slow down with sluggish response. Larger values of external capacitance could also cause the module to become unstable.

The Tunable LoopTM allows the user to externally adjust the voltage control loop to match the filter network connected to the output of the module. The Tunable LoopTM is implemented by connecting a series R-C between the VS+ and TRIM pins of the module, as shown in Fig. 46. This R-C allows the user to externally adjust the voltage loop feedback compensation of the module.

Figure. 46. Circuit diagram showing connection of R and C

Recommended values of R capacitor combinations are given in Tables 2 and 3. Table 3 shows the recommended values of R different values of ceramic output capacitors up to 1000uF that might be needed for an application to meet output ripple and noise requirements. Selecting R according to Table 3 will ensure stable operation of the module. In applications with tight output voltage limits in the presence of dynamic current loading, additional output capacitance will be required. Table 3 lists recommended values of R voltage deviation limits for some common output voltages in the presence of a 10A to 20A step change (50% of full load), with an input voltage of 12V.

Please contact your Lineage Power technical representative to obtain more details of this feature as well as for

TUNE

TM

to tune the control loop of the module.

TUNE

and C

TUNE

in order to meet 2% output

TUNE

for different output

TUNE

and C

TUNE

and C

for

TUNE

TUME

guidelines on how to select the right value of external R-C to tune the module for best transient performance and stable operation for other output capacitance values.

Table 2. General recommended values of of R C

for Vin=12V and various external ceramic capacitor

TUNE

and

combinations.

Table 3. Recommended values of R

TUNE

and C

TUNE

to obtain transient deviation of 2% of Vout for a 10A step load with Vin=12V.

Note: The capacitors used in the Tunable Loop tables are 47 μF/3 mΩ ESR ceramic and 330 μF/12 mΩ ESR polymer capacitors.

GE

Data Sheet

20A Digital MicroDLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 20A Output Current

April 24, 2013

Page 19

Data Byte High

7 6 5 4 3 2 1 0 7 6 5 4 3 2 1

0

Data Byte Low

Exponent

MSB

Mantissa

MSB

Digit

Resistor Value (KΩ)

0

10 1 15.4 2 23.7 3 36.5 4 54.9 5 84.5 6 130 7 200

ADDR0

SIG_GND

R

ADDR0

R

ADDR1

Bit Position

4 3 2 1 0

Access

r/w

r/w r Function

PU

CMD

CPR

POL

CPA

Default Value

1 0 1 1 1

Digital Feature Descriptions

PMBus Interface Capability

The 20A Digital MicroDLynxTM power modules have a PMBus interface that supports both communication and control. The PMBus Power Management Protocol Specification can be obtained from www.pmbus.org. The modules support a subset of version 1.1 of the specification (see Table 6 for a list of the specific commands supported). Most module parameters can be programmed using PMBus and stored as defaults for later use.

All communication over the module PMBus interface must support the Packet Error Checking (PEC) scheme. The PMBus master must generate the correct PEC byte for all transactions, and check the PEC byte returned by the module.

The module also supports the SMBALERT# response protocol whereby the module can alert the bus master if it wants to talk. For more information on the SMBus alert response protocol, see the System Management Bus (SMBus) specification.

The module has non-volatile memory that is used to store configuration settings. Not all settings programmed into the device are automatically saved into this non-volatile memory, only those specifically identified as capable of being stored can be saved (see Table 6 for which command parameters can be saved to non-volatile storage).

either address resistor value is outside the range specified in Table 4, the module will respond to address 127.

Table 4

The user must know which I2C addresses are reserved in a system for special functions and set the address of the module to avoid interfering with other system operations. Both 100kHz and 400kHz bus speeds are supported by the module. Connection for the PMBus interface should follow the High Power DC specifications given in section 3.1.3 in the SMBus specification V2.0 for the 400kHz bus speed or the Low Power DC specifications in section 3.1.2. The complete SMBus specification is available from the SMBus web site,

smbus.org.

PMBus Data Format

For commands that set thresholds, voltages or report such

quantities, the module supports the “Linear” data format

among the three data formats supported by PMBus. The Linear Data Format is a two byte value with an 11-bit, two’s complement mantissa and a 5-bit, two’s complement exponent. The format of the two data bytes is shown below:

The value is of the number is then given by

Value = Mantissa x 2

Exponent

PMBus Addressing

The power module can be addressed through the PMBus using a device address. The module has 64 possible addresses (0 to 63 in decimal) which can be set using resistors connected from the ADDR0 and ADDR1 pins to GND. Note that some of these addresses (0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 12, 40, 44, 45, 55 in decimal) are reserved according to the SMBus specifications and may not be useable. The address is set in the form of two octal (0 to 7) digits, with each pin setting one digit. The ADDR1 pin sets the high order digit and ADDR0 sets the low order digit. The resistor values suggested for each digit are shown in Table 4 (1% tolerance resistors are recommended). Note that if

Figure 47. Circuit showing connection of resistors used to set the PMBus address of the module.

PMBus Enabled On/Off

The module can also be turned on and off via the PMBus interface. The OPERATION command is used to actually turn the module on and off via the PMBus, while the ON_OFF_CONFIG command configures the combination of analog ON/OFF pin input and PMBus commands needed to turn the module on and off. Bit [7] in the OPERATION command data byte enables the module, with the following functions:

0 : Output is disabled 1 : Output is enabled

This module uses the lower five bits of the ON_OFF_CONFIG data byte to set various ON/OFF options as follows:

GE

Data Sheet

20A Digital MicroDLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 20A Output Current

April 24, 2013

Page 20

Bit Value

Action

0

Module powers up any time power is present regardless of state of the analog ON/OFF pin

1

Module does not power up until commanded by the analog ON/OFF pin and the OPERATION command as programmed in bits [2:0] of the ON_OFF_CONFIG register.

Bit Value

Action

0

Module ignores the ON bit in the OPERATION command

1

Module responds to the ON bit in the OPERATION command

Bit Value

Action

0

Module ignores the analog ON/OFF pin, i.e. ON/OFF is only controlled through the PMBUS via the OPERATION command

1

Module requires the analog ON/OFF pin to be asserted to start the unit

Rise Time

Exponent

Mantissa

600μs

11100

00000001010

900μs

11100

00000001110

1.2ms

11100

00000010011

1.8ms

11100

00000011101

2.7ms

11100

00000101011

4.2ms

11100

00001000011

6.0ms

11100

00001100000

9.0ms

11100

00010010000

REFOUT

V

RTrim

V 

 



 







20000

RTrim

LOOPSCALEVOUT





20000

__

10

)(

2_



 TRIMVOUTV

offsetOUT

PU: Sets the default to either operate any time input power is present or for the ON/OFF to be controlled by the analog ON/OFF input and the PMBus OPERATION command. This bit is used together with the CP, CMD and ON bits to determine startup.

Output Voltage Adjustment Using the PMBus

The VOUT_SCALE_LOOP parameter is important for a number of PMBus commands related to output voltage trimming, margining, over/under voltage protection and the PGOOD thresholds. The output voltage of the module is set as the combination of the voltage divider formed by RTrim and a 20kΩ upper divider resistor inside the module, and the internal reference voltage of the module. The reference voltage V regulation voltage is then given by

is nominally set at 600mV, and the output

REF

CMD: The CMD bit controls how the device responds to the OPERATION command.

CPR: Sets the response of the analog ON/OFF pin. This bit is used together with the CMD, PU and ON bits to determine startup.

PMBus Adjustable Soft Start Rise Time

The soft start rise time can be adjusted in the module via PMBus. When setting this parameter, make sure that the charging current for output capacitors can be delivered by the module in addition to any load current to avoid nuisance tripping of the overcurrent protection circuitry during startup. The TON_RISE command sets the rise time in ms, and allows choosing soft start times between 600μs and 9ms, with possible values listed in Table 5. Note that the exponent is fixed at -4 (decimal) and the upper two bits of the mantissa are also fixed at 0.

Table 5

Hence the module output voltage is dependent on the value of RTrim which is connected external to the module. The information on the output voltage divider ratio is conveyed to the module through the VOUT_SCALE_LOOP parameter which is calculated as follows:

The VOUT_SCALE_LOOP parameter is specified using the

“Linear” format and two bytes. The upper five bits [7:3] of the

high byte are used to set the exponent which is fixed at –9 (decimal). The remaining three bits of the high byte [2:0] and the eight bits of the lower byte are used for the mantissa. The default value of the mantissa is 00100000000 corresponding to 256 (decimal), corresponding to a divider ratio of 0.5. The maximum value of the mantissa is 512 corresponding to a divider ratio of 1. Note that the resolution of the VOUT_SCALE_LOOP command is 0.2%.

When PMBus commands are used to trim or margin the output voltage, the value of V the module, which in turn changes the regulated output voltage of the module.

The nominal output voltage of the module can be adjusted with a minimum step size of 0.4% over a ±25% range from nominal using the VOUT_TRIM command over the PMBus.

The VOUT_TRIM command is used to apply a fixed offset voltage to the output voltage command value

using the “Linear” mode with the exponent fixed at –10 (decimal). The value of the offset voltage is given by

is what is changed inside

REF

This offset voltage is added to the voltage set through the divider ratio and nominal V output voltage. The valid range in two’s complement for this command is –4000h to 3999h. The high order two bits of the high byte must both be either 0 or 1. If a value outside of the +/-25% adjustment range is given with this command, the module will set it’s output voltage to the nominal value (as if VOUT_TRIM had been set to 0), assert SMBALRT#, set the CML bit in STATUS_BYTE and the invalid data bit in STATUS_CML.

to produce the trimmed

REF

GE

Data Sheet

20A Digital MicroDLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 20A Output Current

April 24, 2013

Page 21

10

)(

2)___(







TRIMVOUTHIGHMARGINVOUT

V

MHOUT10)(

2)___(







TRIMVOUTLOWMARGINVOUT

V

MLOUT

10

)_(

10

)_(

2)___(





LIMITFAULTUVVOUTV

LIMITFAULTOVVOUTV

REQUVOUT

REQOVOUT

Output Voltage Margining Using the PMBus

The module can also have its output voltage margined via PMBus commands. The command VOUT_MARGIN_HIGH sets the margin high voltage, while the command VOUT_MARGIN_LOW sets the margin low voltage. Both the VOUT_MARGIN_HIGH and VOUT_MARGIN_LOW commands use the “Linear” mode with the exponent fixed at –10 (decimal). Two bytes are used for the mantissa with the upper bit [7] of the high byte fixed at 0. The actual margined output voltage is a combination of the VOUT_MARGIN_HIGH or VOUT_MARGIN_LOW and the VOUT_TRIM values as shown below.

Note that the sum of the margin and trim voltages cannot be outside the ±25% window around the nominal output voltage. The data associated with VOUT_MARGIN_HIGH and VOUT_MARGIN_LOW can be stored to non-volatile memory using the STORE_DEFAULT_ALL command.

The module is commanded to go to the margined high or low voltages using the OPERATION command. Bits [5:2] are used to enable margining as follows:

00XX : Margin Off 0101 : Margin Low (Ignore Fault) 0110 : Margin Low (Act on Fault) 1001 : Margin High (Ignore Fault) 1010 : Margin High (Act on Fault)

PMBus Adjustable Overcurrent Warning

The module can provide an overcurrent warning via the PMBus. The threshold for the overcurrent warning can be set using the parameter IOUT_OC_WARN_LIMIT. This

command uses the “Linear” data format with a two byte

data word where the upper five bits [7:3] of the high byte represent the exponent and the remaining three bits of the high byte [2:0] and the eight bits in the low byte represent the mantissa. The exponent is fixed at –1 (decimal). The

upper six bits of the mantissa are fixed at 0 while the lower five bits are programmable with a default value of 24A (decimal). The resolution of this warning limit is 500mA. The value of the IOUT_OC_WARN_LIMIT can be stored to nonvolatile memory using the STORE_DEFAULT_ALL command.

used to set the output over voltage threshold from four possible values: 108%, 110%, 112% or 115% of the commanded output voltage. The command VOUT_UV_FAULT_LIMIT sets the threshold that causes an output under voltage fault and can also be selected from four possible values: 92%, 90%, 88% or 85%. The default values are 112% and 88% of commanded output voltage. Both commands use two data bytes formatted as two’s

complement binary integers. The “Linear” mode is used with

the exponent fixed to –10 (decimal) and the effective over or under voltage trip points given by:

Values within the supported range for over and undervoltage detection thresholds will be set to the nearest fixed percentage. Note that the correct value for VOUT_SCALE_LOOP must be set in the module for the correct over or under voltage trip points to be calculated.

In addition to adjustable output voltage protection, the 12A Digital Pico DLynxTM module can also be programmed for the response to the fault. The VOUT_OV_FAULT RESPONSE and VOUT_UV_FAULT_RESPONSE commands specify the response to the fault. Both these commands use a single data byte with the possible options as shown below.

1. Continue operation without interruption (Bits [7:6]

= 00, Bits [5:3] = xxx)

2. Continue for four switching cycles and then shut

down if the fault is still present, followed by no restart or continuous restart (Bits [7:6] = 01, Bits [5:3] = 000 means no restart, Bits [5:3] = 111 means continuous restart)

3. Immediate shut down followed by no restart or

continuous restart (Bits [7:6] = 10, Bits [5:3] = 000 means no restart, Bits [5:3] = 111 means continuous restart).

4. Module output is disabled when the fault is present

and the output is enabled when the fault no longer exists (Bits [7:6] = 11, Bits [5:3] = xxx).

Note that separate response choices are possible for output over voltage or under voltage faults.

Temperature Status via PMBus

The module can provide information related to temperature of the module through the STATUS_TEMPERATURE command. The command returns information about whether the pre-set over temperature fault threshold and/or the warning threshold have been exceeded.

PMBus Adjustable Output Over and Under Voltage Protection

The module has output over and under voltage protection capability. The PMBus command VOUT_OV_FAULT_LIMIT is

GE

Data Sheet

20A Digital MicroDLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 20A Output Current

April 24, 2013

Page 22

10

)_(

10

)_(

2)__(





OFFGOODPOWERV

ONGOODPOWERV

OFFPGOODOUT

ONPGOODOUT

PMBus Adjustable Input Undervoltage Lockout

The module allows adjustment of the input under voltage lockout and hysteresis. The command VIN_ON allows setting the input voltage turn on threshold, while the VIN_OFF command sets the input voltage turn off threshold. For the VIN_ON command, possible values are 2.75V, and 3V to 14V in 0.5V steps. For the VIN_OFF command, possible values are 2.5V to 14V in 0.5V steps. If other values are entered for either command, they will be mapped to the closest of the allowed values.

Both the VIN_ON and VIN_OFF commands use the “Linear”

format with two data bytes. The upper five bits represent the exponent (fixed at -2) and the remaining 11 bits represent the mantissa. For the mantissa, the four most significant bits are fixed at 0.

Power Good

The module provides a Power Good (PGOOD) signal that is implemented with an open-drain output to indicate that the output voltage is within the regulation limits of the power module. The PGOOD signal will be de-asserted to a low state if any condition such as overtemperature, overcurrent or loss of regulation occurs that would result in the output voltage going outside the specified thresholds. The PGOOD thresholds are user selectable via the PMBus (the default values are as shown in the Feature Specifications Section). Each threshold is set up symmetrically above and below the nominal value. The POWER_GOOD_ON command sets the output voltage level above which PGOOD is asserted (lower threshold). For example, with a 1.2V nominal output voltage, the POWER_GOOD_ON threshold can set the lower threshold to 1.14 or 1.1V. Doing this will automatically set the upper thresholds to 1.26 or 1.3V.

The POWER_GOOD_OFF command sets the level below which the PGOOD command is de-asserted. This command also sets two thresholds symmetrically placed around the nominal output voltage. Normally, the POWER_GOOD_ON threshold is set higher than the POWER_GOOD_OFF threshold.

Both POWER_GOOD_ON and POWER_GOOD_OFF commands use the “Linear” format with the exponent fixed at –10 (decimal). The two thresholds are given by

Both commands use two data bytes with bit [7] of the high byte fixed at 0, while the remaining bits are r/w and used to

set the mantissa using two’s complement representation.

Both commands also use the The VOUT_SCALE_LOOP parameter so it must be set correctly. The default value of POWER_GOOD_ON is set at 1.1035V and that of the POWER_GOOD_OFF is set at 1.08V. The values associated with these commands can be stored in non-volatile memory using the STORE_DEFAULT_ALL command.

PGOOD terminal can be connected through a pullup resistor (suggested value 100K) to a source of 5VDC or lower.

Measurement of Output Current, Output Voltage and Input Voltage

The module is capable of measuring key module parameters such as output current and voltage and input voltage and providing this information through the PMBus interface. Roughly every 200μs, the module makes 16 measurements each of output current, voltage and input voltage. Average values of each of these measurements are then calculated and placed in the appropriate registers. These values in the registers can then be read using the PMBus interface.

Measuring Output Current Using the PMBus

The module measures current by using the inductor winding resistance as a current sense element. The inductor winding resistance is then the current gain factor used to scale the measured voltage into a current reading. This gain factor is the argument of the IOUT_CAL_GAIN command, and consists of two bytes in the linear data format. The exponent uses the upper five bits [7:3] of the high data byte in two-s complement format and is fixed at –15 (decimal). The

remaining 11 bits in two’s complement binary format

represent the mantissa. During manufacture, each module is calibrated by measuring and storing the current gain factor into non-volatile storage.

The current measurement accuracy is also improved by each module being calibrated during manufacture with the offset in the current reading. The IOUT_CAL_OFFSET command is used to store and read the current offset. The argument for this command consists of two bytes composed of a 5-bit exponent (fixed at -4d) and a 11-bit mantissa. This command has a resolution of 62.5mA and a range of -4000mA to +3937.5mA.

The READ_IOUT command provides module average output current information. This command only supports positive or current sourced from the module. If the converter is sinking current a reading of 0 is provided. The READ_IOUT command returns two bytes of data in the linear data format. The exponent uses the upper five bits [7:3] of the high data byte in two-s complement format and is fixed at –

4 (decimal). The remaining 11 bits in two’s complement

binary format represent the mantissa with the 11th bit fixed at 0 since only positive numbers are considered valid.

Note that the current reading provided by the module is not corrected for temperature. The temperature corrected current reading for module temperature T estimated using the following equation





where I

OUT_CORR

current measurement, I measurement value, T winding on the module. Since it may be difficult to measure



 

is the temperature corrected value of the

READ_OUT

is the temperature of the inductor

IND



󰇟

󰇛



 󰇜  



is the module current

Module

can be

󰇠

GE

Data Sheet

20A Digital MicroDLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 20A Output Current

April 24, 2013

Page 23

OFFSETCALVOUT

GAINCALVOUTInitialV

FinalV

OUT

__

)]__1()([

)(







OFFSETCALVIN

GAINCALVINInitialV

FinalV

IN

__

)]__1()([

)(







Bit

Position

Flag

Default

Value

7 X 0

6

OFF

0 5 VOUT Overvoltage

0 4 IOUT Overcurrent

0

3

VIN Undervoltage

0

2

Temperature

0

1

CML (Comm. Memory Fault)

0 0 None of the above

0

Bit

Position

Flag

Default

Value

7 X 0

6

OFF

0

5

VOUT Overvoltage

0 4 IOUT Overcurrent

0

3

VIN Undervoltage

0

2

Temperature

0

1

CML (Comm. Memory Fault)

0 0 None of the above

0

Bit

Position

Flag

Default

Value

7

VOUT fault or warning

0 6 IOUT fault or warning

0

5 X 0

4 X 0

3

POWER_GOOD# (is negated)

0

2 X 0

1 X 0

0 X 0

Bit

Position

Flag

Default

Value

7

VOUT OV Fault

0

6 X 0

5 X 0

4

VOUT UV Fault

0

3 X 0

2 X 0

1 X 0

0 X 0

T

, it may be approximated by an estimate of the module

IND

temperature.

Measuring Output Voltage Using the PMBus

The module can provide output voltage information using the READ_VOUT command. The command returns two bytes of data all representing the mantissa while the exponent is fixed at -10 (decimal).

During manufacture of the module, offset and gain correction values are written into the non-volatile memory of the module. The command VOUT_CAL_OFFSET can be used to read and/or write the offset (two bytes consisting of a 16-bit mantissa in two’s complement format) while the exponent is always fixed at -10 (decimal). The allowed range for this offset correction is -125 to 124mV. The command VOUT_CAL_GAIN can be used to read and/or write the gain correction - two bytes consisting of a five-bit exponent (fixed at -8) and a 11-bit mantissa. The range of this correction factor is -0.125 to +0.121, with a resolution of 0.004. The corrected output voltage reading is then given by:

.

STATUS_BYTE : Returns one byte of information with a summary of the most critical device faults.

STATUS_WORD: Returns two bytes of information with a summary of the module’s fault/warning conditions.

Low Byte

Measuring Input Voltage Using the PMBus

The module can provide output voltage information using the READ_VIN command. The command returns two bytes of data in the linear format. The upper five bits [7:3] of the high data form the two’s complement representation of the exponent which is fixed at –5 (decimal). The remaining 11

bits are used for two’s complement representation of the

mantissa, with the 11th bit fixed at zero since only positive numbers are valid.

During module manufacture, offset and gain correction values are written into the non-volatile memory of the module. The command VIN_CAL_OFFSET can be used to read and/or write the offset - two bytes consisting of a fivebit exponent (fixed at -5) and a11-bit mantissa in two’s complement format. The allowed range for this offset correction is -2to 1.968V, and the resolution is 32mV. The command VIN_CAL_GAIN can be used to read and/or write the gain correction - two bytes consisting of a five-bit exponent (fixed at -8) and a 11-bit mantissa. The range of this correction factor is -0.125 to +0.121, with a resolution of

0.004. The corrected output voltage reading is then given by:

Reading the Status of the Module using the PMBus

High Byte

STATUS_VOUT : Returns one byte of information relating to the status of the module’s output voltage related faults.

The module supports a number of status information commands implemented in PMBus. However, not all features are supported in these commands. A 1 in the bit position indicates the fault that is flagged.

GE

Data Sheet

20A Digital MicroDLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 20A Output Current

April 24, 2013

Page 24

Bit

Position

Flag

Default

Value

7

IOUT OC Fault

0

6 X 0

5

IOUT OC Warning

0

4 X 0

3 X 0

2 X 0

1 X 0

0 X 0

Bit

Position

Flag

Default

Value

7

OT Fault

0

6

OT Warning

0

5 X 0

4 X 0

3 X 0

2 X 0

1 X 0

0 X 0

Bit

Position

Flag

Default

Value

7

Invalid/Unsupported Command

0

6

Invalid/Unsupported Command

0 5 Packet Error Check Failed

0

4 X 0

3 X 0

2 X 0 1 Other Communication Fault

0

0 X 0

Bit Position

Flag

Default

Value

7:2

Module Name

000010

1:0

Reserved

10

Bit Position

Flag

Default

Value

7:0

Module Revision Number

None

1:0

Manufacturer ID

00

STATUS_IOUT : Returns one byte of information relating to the status of the module’s output voltage related faults.

Low Byte

High Byte

STATUS_TEMPERATURE : Returns one byte of information

relating to the status of the module’s temperature related

faults.

STATUS_CML : Returns one byte of information relating to the status of the module’s communication related faults.

MFR_VIN_MIN : Returns minimum input voltage as two data bytes of information in Linear format (upper five bits are exponent – fixed at -2, and lower 11 bits are mantissa in two’s complement format – fixed at 12)

MFR_VOUT_MIN : Returns minimum output voltage as two data bytes of information in Linear format (upper five bits are exponent – fixed at -10, and lower 11 bits are mantissa in two’s complement format – fixed at 614)

MFR_SPECIFIC_00: Returns information related to the type of module. Bits [7:2] in the Low Byte indicate the module type (000010 corresponds to the UDT020 series of module). Bits 1:0 in the High Byte are used to indicate the manufacturer ID, with 00 reserved for GE.

GE

Data Sheet

20A Digital MicroDLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 20A Output Current

April 24, 2013

Page 25

Hex

Code

Command

Brief Description

Non-Volatile

Memory Storage

01

OPERATION

Turn Module on or off. Also used to margin the output voltage

Format

Unsigned Binary

Bit Position

7 6 5 4 3 2 1

0

Access

r/w r r/w

r/w

r/w r r

Function

On X Margin

X

Default Value

0 0 0 0 0 0 X

X

02

ON_OFF_CONFIG

Configures the ON/OFF functionality as a combination of analog ON/OFF pin and PMBus commands

Format

Unsigned Binary

Bit Position

7 6 5 4 3 2 1

0

Access

r r r

r/w

r

Function

X X X

pu

cmd

cpr

pol

cpa

Default Value

0 0 0 1 0 1 1

1

YES

03

CLEAR_FAULTS

Clear any fault bits that may have been set, also releases the SMBALERT# signal if the device has been asserting it.

10

WRITE_PROTECT

Used to control writing to the module via PMBus. Copies the current register setting in the module whose command code matches the value in the data byte into non-volatile memory (EEPROM) on the module

Format

Unsigned Binary

Bit Position

7 6 5 4 3 2 1

0

Access

r/w

r/w x x x x

x

Function

bit7

bit6

bit5 X X X X

X

Default Value

0 0 0 X X X X

X

Bit5: 0 – Enables all writes as permitted in bit6 or bit7 1 – Disables all writes except the WRITE_PROTECT, OPERATION and ON_OFF_CONFIG (bit 6 and bit7 must be 0) Bit 6: 0 – Enables all writes as permitted in bit5 or bit7 1 – Disables all writes except for the WRITE_PROTECT and OPERATION commands (bit5 and bit7 must be 0) Bit7: 0 – Enables all writes as permitted in bit5 or bit6 1 – Disables all writes except for the WRITE_PROTECT command (bit5 and bit6 must be 0)

YES

11

STORE_DEFAULT_ALL

Copies all current register settings in the module into non-volatile memory (EEPROM) on the module. Takes about 50ms for the command to execute.

12

RESTORE_DEFAULT_ALL

Restores all current register settings in the module from values in the module non-volatile memory (EEPROM)

13

STORE_DEFAULT_CODE

Copies the current register setting in the module whose command code matches the value in the data byte into non-volatile memory (EEPROM) on the module

Bit Position

7 6 5 4 3 2 1

0

Access

w w w w w w w

w

Function

Command code

14

RESTORE_DEFAULT_CODE

Restores the current register setting in the module whose command code matches the value in the data byte from the value in the module non-volatile memory (EEPROM)

Bit Position

7 6 5 4 3 2 1

0

Access

w w w w w w w

w

Function

Command code

20

VOUT_MODE

The module has MODE set to Linear and Exponent set to -10. These values cannot be changed

Bit Position

7 6 5 4 3 2 1

0

Access

r r r r r r r

r

Function

Mode

Exponent

Default Value

0 0 0 1 0 1 1

0

Summary of Supported PMBus Commands

Please refer to the PMBus 1.1 specification for more details of these commands.

Table 6

GE

Data Sheet

20A Digital MicroDLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 20A Output Current

April 24, 2013

Page 26

Hex

Code

Command

Brief Description

Non-Volatile

Memory Storage

22

VOUT_TRIM

Apply a fixed offset voltage to the output voltage command value

Format

Linear, two’s complement binary

Bit Position

7 6 5 4 3 2 1

0

Access

r/w

Function

High Byte

Default Value

0 0 0 0 0 0 0

0

Bit Position

7 6 5 4 3 2 1

0

Access

r/w

Function

Low Byte

Default Value

0 0 0 0 0 0 0

0

YES

25

VOUT_MARGIN_HIGH

Sets the target voltage for margining the output high

Format

Linear, two’s complement binary

Bit Position

7 6 5 4 3 2 1

0

Access

r

r/w

Function

High Byte

Default Value

0 0 0 0 0 1 0

1

Bit Position

7 6 5 4 3 2 1

0

Access

r/w

Function

Low Byte

Default Value

0 1 0 0 0 1 1

1

YES

26

VOUT_MARGIN_LOW

Sets the target voltage for margining the output low

Format

Linear, two’s complement binary

Bit Position

7 6 5 4 3 2 1

0

Access

r

r/w

Function

High Byte

Default Value

0 0 0 0 0 1 0 0 Bit Position

7 6 5 4 3 2 1

0

Access

r/w

Function

Low Byte

Default Value

0 1 0 1 0 0 0

1

YES

29

VOUT_SCALE_LOOP

Sets the scaling of the output voltage – equal to the feedback resistor divider ratio

Format

Linear, two’s complement binary

Bit Position

7 6 5 4 3 2 1

0

Access

r r r r r r r/w

r/w

Function

Exponent

Mantissa

Default Value

1 0 1 1 1 0 0

1

Bit Position

7 6 5 4 3 2 1

0

Access

r/w

Function

Mantissa

Default Value

0 0 0 0 0 0 0

0

YES

35

VIN_ON

Sets the value of input voltage at which the module turns on

Format

Linear, two’s complement binary

Bit Position

7 6 5 4 3 2 1

0

Access

r r r r r r r

r

Function

Exponent

Mantissa

Default Value

1 1 1 1 0 0 0 0 Bit Position

7 6 5 4 3 2 1

0

Access

r

r/w

Function

Mantissa

Default Value

0 0 0 0 1 0 1

1

YES

Table 6 (continued)

GE

Data Sheet

20A Digital MicroDLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 20A Output Current

April 24, 2013

Page 27

Hex

Code

Command

Brief Description

Non-Volatile

Memory Storage

36

VIN_OFF

Sets the value of input voltage at which the module turns off

Format

Linear, two’s complement binary

Bit Position

7 6 5 4 3 2 1

0

Access

r r r r r r r

r

Function

Exponent

Mantissa

Default Value

1 1 1 1 0 0 0

0

Bit Position

7 6 5 4 3 2 1

0

Access

r

r/w

Function

Mantissa

Default Value

0 0 0 0 1 0 1

0

YES

38

IOUT_CAL_GAIN

Returns the value of the gain correction term used to correct the measured output current

Format

Linear, two’s complement binary

Bit Position

7 6 5 4 3 2 1

0

Access

r r r r r r r

r/w

Function

Exponent

Mantissa

Default Value

1 0 0 0 1 0 0

V

Bit Position

7 6 5 4 3 2 1

0

Access

r/w

Function

Mantissa

Default Value

V: Variable based on factory calibration

YES

39

IOUT_CAL_OFFSET

Returns the value of the offset correction term used to correct the measured output current

Format

Linear, two’s complement binary

Bit Position

7 6 5 4 3 2 1

0

Access

r r r r r

r/w r r

Function

Exponent

Mantissa

Default Value

1 1 1 0 0 V 0

0

Bit Position

7 6 5 4 3 2 1

0

Access

r r r/w

r/w

Function

Mantissa

Default Value

0 0 V: Variable based on factory calibration

YES

40

VOUT_OV_FAULT_LIMIT

Sets the voltage level for an output overvoltage fault

Format

Linear, two’s complement binary

Bit Position

7 6 5 4 3 2 1

0

Access

r

r/w

Function

High Byte

Default Value

0 0 0 0 0 1 0

1

Bit Position

7 6 5 4 3 2 1

0

Access

r/w

Function

Low Byte

Default Value

0 0 0 0 1 0 1

0

YES

41

VOUT_OV_FAULT_RESPONSE

Instructs the module on what action to take in response to a output overvoltage fault

Format

Unsigned Binary

Bit Position

7 6 5 4 3 2 1 0 Access

r/w

r/w r r

r

Function

RSP

[1]

RSP

[0]

RS[2]

RS[1]

RS[0] X X

X

Default Value

1 1 1 1 1 1 0

0

YES

Table 6 (continued)

GE

Data Sheet

20A Digital MicroDLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 20A Output Current

April 24, 2013

Page 28

Hex

Code

Command

Brief Description

Non-Volatile

Memory Storage

44

VOUT_UV_FAULT_LIMIT

Sets the voltage level for an output undervoltage fault

Format

Linear, two’s complement binary

Bit Position

7 6 5 4 3 2 1

0

Access

r

r/w

Function

High Byte

Default Value

0 0 0 0 0 1 0

0

Bit Position

7 6 5 4 3 2 1

0

Access

r/w

Function

Low Byte

Default Value

1 0 0 0 1 1 1

1

YES

45

VOUT_UV_FAULT_RESPONSE

Instructs the module on what action to take in response to a output undervoltage fault

Format

Unsigned Binary

Bit Position

7 6 5 4 3 2 1

0

Access

r/w

r/w r r

r

Function

RSP

[1]

RSP

[0]

RS[2]

RS[1]

RS[0] X X

X

Default Value

0 0 0 0 0 1 0

0

YES

46

IOUT_OC_FAULT_LIMIT

Sets the output overcurrent fault level in A (cannot be changed)

Format

Linear, two’s complement binary

Bit Position

7 6 5 4 3 2 1

0

Access

r r r r r r r

r

Function

Exponent

Mantissa

Default Value

Bit Position

7 6 5 4 3 2 1

0

Access

r r r r r r r

R

Function

Mantissa

Default Value

0 0 1 1 0 1 0

0

YES

4A

IOUT_OC_WARN_LIMIT

Sets the output overcurrent warning level in A

Format

Linear, two’s complement binary

Bit Position

7 6 5 4 3 2 1

0

Access

r r r r r r r

r

Function

Exponent

Mantissa

Default Value

1 1 1 1 1 0 0

0

Bit Position

7 6 5 4 3 2 1

0

Access

r r r/w

r/w

Function

Mantissa

Default Value

0 0 1 1 0 0 1

0

YES

5E

POWER_GOOD_ON

Sets the output voltage level at which the PGOOD pin is asserted high

Format

Linear, two’s complement binary

Bit Position

7 6 5 4 3 2 1

0

Access

r

r/w

Function

High Byte

Default Value

0 0 0 0 0 1 0

0

Bit Position

7 6 5 4 3 2 1

0

Access

r/w

Function

Low Byte

Default Value

0 1 1 0 1 0 1

0

YES

Table 6 (continued)

GE

Data Sheet

20A Digital MicroDLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 20A Output Current

April 24, 2013

Page 29

Hex

Code

Command

Brief Description

Non-Volatile

Memory Storage

5F

POWER_GOOD_OFF

Sets the output voltage level at which the PGOOD pin is de-asserted low

Format

Linear, two’s complement binary

Bit Position

7 6 5 4 3 2 1

0

Access

r

r/w

Function

High Byte

Default Value

0 0 0 0 0 1 0

0

Bit Position

7 6 5 4 3 2 1

0

Access

r/w

Function

Low Byte

Default Value

0 1 0 1 0 0 1

0

YES

61

TON_RISE

Sets the rise time of the output voltage during startup

Format

Linear, two’s complement binary

Bit Position

7 6 5 4 3 2 1

0

Access

r r r r r r r

r/w

Function

Exponent

Mantissa

Default Value

1 1 1 0 0 0 0

0

Bit Position

7 6 5 4 3 2 1

0

Access

r/w

Function

Mantissa

Default Value

0 0 1 0 1 0 1

0

YES

78

STATUS_BYTE

Returns one byte of information with a summary of the most critical module faults

Format

Unsigned Binary

Bit Position

7 6 5 4 3 2 1

0

Access

r r r r r r r

r

Flag

X

OFF

VOUT

_OV

IOUT_

OC

VIN_U

V

TEMP

CML

OTHE

R

Default Value

0 0 0 0 0 0 0

0

79

STATUS_WORD

Returns two bytes of information with a summary of the module’s fault/warning

conditions

Format

Unsigned binary

Bit Position

7 6 5 4 3 2 1

0

Access

r r r r r r r

r

Flag

VOUT

IOUT_

OC

X

PGOO

D

X X X

Default Value

0 0 0 0 0 0 0

0

Bit Position

7 6 5 4 3 2 1

0

Access

r r r r r r r

r

Flag

X

OFF

VOUT

_OV

IOUT_

OC

VIN_U

V

TEMP

CML

OTHE

R

Default Value

0 0 0 0 0 0 0

0

7A

STATUS_VOUT

Returns one byte of information with the status of the module’s output voltage related faults

Format

Unsigned Binary

Bit Position

7

6 5 4 3 2 1 0

Access

r r r r r r r

r

Flag

VOUT_OV

X X VOUT_UV

X X X

X

Default Value

0

0 0 0 0 0 0 0

7B

STATUS_IOUT

Returns one byte of information with the status of the module’s output current related faults

Format

Unsigned Binary

Bit Position

7 6 5

4 3 2 1 0

Access

r r r

r r r r r

Flag

IOUT_OC

X

IOUT_OC_WARN

X X X X X

Default Value

0 0 0

0 0 0 0 0

Table 6 (continued)

GE

Data Sheet

20A Digital MicroDLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 20A Output Current

April 24, 2013

Page 30

Hex

Code

Command

Brief Description

Non-Volatile

Memory Storage

7D

STATUS_TEMPERATURE

Returns one byte of information with the status of the module’s temperature

related faults

Format

Unsigned Binary

Bit Position

7

6

5 4 3 2 1

0

Access

r r r r r r r

r

Flag

OT_FAULT

OT_WARN

X X X X X

X

Default Value

0

0 0 0 0 0

0

7E

STATUS_CML

Returns one byte of information with the status of the module’s communication

related faults

Format

Unsigned Binary

Bit Position

7 6 5 4 3 2 1

0

Access

r r r r r r r

r

Flag

Invalid

Command

Invalid

Data

PEC Fail

X X X

Other

Comm

Fault

X

Default Value

0 0 0 0 0 0 0

0

88

READ_VIN

Returns the value of the input voltage applied to the module

Format

Linear, two’s complement binary

Bit Position

7 6 5 4 3 2 1

0

Access

r r r r r r r

r

Function

Exponent

Mantissa

Default Value

1 1 0 1 1 0 0

0

Bit Position

7 6 5 4 3 2 1

0

Access

r r r r r r r

r

Function

Mantissa

Default Value

0 0 0 0 0 0 0

0

8B

READ_VOUT

Returns the value of the output voltage of the module

Format

Linear, two’s complement binary

Bit Position

7 6 5 4 3 2 1

0

Access

r r r r r r r

r

Function

Mantissa

Default Value

0 0 0 0 0 0 0

0

Bit Position

7 6 5 4 3 2 1

0

Access

r r r r r r r

r

Function

Mantissa

Default Value

0 0 0 0 0 0 0

0

8C

READ_IOUT

Returns the value of the output current of the module

Format

Linear, two’s complement binary

Bit Position

7 6 5 4 3 2 1

0

Access

r r r r r r r

r

Function

Exponent

Mantissa

Default Value

1 1 1 0 0 0 0

0

Bit Position

7 6 5 4 3 2 1

0

Access

r r r r r r r

r

Function

Mantissa

Default Value

0 0 0 0 0 0 0

0

98

PMBUS_REVISION

Returns one byte indicating the module is compliant to PMBus Spec. 1.1 (read only)

Format

Unsigned Binary

Bit Position

7 6 5 4 3 2 1

0

Access

r r r r r r r

r

Default Value

0 0 0 1 0 0 0

1

YES

Table 6 (continued)

GE

Data Sheet

20A Digital MicroDLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 20A Output Current

April 24, 2013

Page 31

Hex

Code

Command

Brief Description

Non-Volatile

Memory Storage

A0

MFR_VIN_MIN

Returns the minimum input voltage the module is specified to operate at (read only)

Format

Linear, two’s complement binary

Bit Position

7 6 5 4 3 2 1

0

Access

r r r r r r r

r

Function

Exponent

Mantissa

Default Value

1 1 1 1 0 0 0

0

Bit Position

7 6 5 4 3 2 1 0 Access

r r r r r r r

r

Function

Mantissa

Default Value

0 0 0 0 1 1 0

0

YES

A4

MFR_VOUT_MIN

Returns the minimum output voltage possible from the module (read only)

Format

Linear, two’s complement binary

Bit Position

7 6 5 4 3 2 1

0

Access

r r r r r r r

r

Function

Exponent

Mantissa

Default Value

0 0 0 0 0 0 1

0

Bit Position

7 6 5 4 3 2 1 0 Access

r r r r r r r

r

Function

Mantissa

Default Value

0 1 1 0 0 1 1

0

YES

D0

MFR_SPECIFIC_00

Returns module name information (read only)

Format

Unsigned Binary

Bit Position

7 6 5 4 3 2 1

0

Access

r r r r r r r

r

Function

Reserved

Default Value

1 1 1 0 1 0 0

0

Bit Position

7 6 5 4 3 2 1

0

Access

r r r r r r r

r

Function

Module Name

Reserved

Default Value

0 0 0 0 1 0 1

0

YES

D4

VOUT_CAL_OFFSET

Applies an offset to the READ_VOUT command results to calibrate out offset errors in module measurements of the output voltage (between -125mV and +124mV)

Format

Linear, two’s complement binary

Bit Position

7 6 5 4 3 2 1

0

Access

r/w r r r r r r

r

Function

Mantissa

Default Value

V 0 0 0 0 0 0

0

Bit Position

7 6 5 4 3 2 1

0

Access

r/w

Function

Mantissa

Default Value

V V V V V V V

V

YES

D5

VOUT_CAL_GAIN

Applies a gain correction to the READ_VOUT command results to calibrate out gain errors in module measurements of the output voltage (between -0.125 and 0.121)

Format

Linear, two’s complement binary

Bit Position

7 6 5 4 3 2 1

0

Access

r r r r r r r

r/w

Function

Exponent

Mantissa

Default Value

1 1 0 0 0 0 0

V

Bit Position

7 6 5 4 3 2 1

0

Access

r/w

Function

Mantissa

Default Value

V V V V V V V

V

YES

Table 6 (continued)

GE

Data Sheet

20A Digital MicroDLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 20A Output Current

April 24, 2013

Page 32

Hex

Code

Command

Brief Description

Non-Volatile

Memory Storage

D6

VIN_CAL_OFFSET

Applies an offset correction to the READ_VIN command results to calibrate out offset errors in module measurements of the input voltage (between -2V and +1.968V)

Format

Linear, two’s complement binary

Bit Position

7 6 5 4 3 2 1

0

Access

r r r r r/w r r

r/w

Function

Exponent

Mantissa

Default Value

1 1 0 1 V 0 0

V

Bit Position

7 6 5 4 3 2 1

0

Access

r r r/w

r/w

Function

Mantissa

Default Value

0 0 V V V V V

V

YES

D7

VIN_CAL_GAIN

Applies a gain correction to the READ_VIN command results to calibrate out gain errors in module measurements of the input voltage (between -0.125 and 0.121)

Format

Linear, two’s complement binary

Bit Position

7 6 5 4 3 2 1

0

Access

r r r r r/w r r

r/w

Function

Exponent

Mantissa

Default Value

1 1 0 0 V 0 0

V

Bit Position

7 6 5 4 3 2 1

0

Access

r r r

r/w

Function

Mantissa

Default Value

0 0 0 V V V V

V

YES

Table 6 (continued)

GE

Data Sheet

20A Digital MicroDLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 20A Output Current

April 24, 2013

Page 33

Air

flow

x

Power Module

Wind Tunnel

PWBs

12.7_

(0.50)

76.2_

(3.0)

Probe Location

for measuring

airflow and

ambient

temperature

25.4_

(1.0)

Figure 48. Thermal Test Setup.

Thermal Considerations

Power modules operate in a variety of thermal environments; however, sufficient cooling should always be provided to help ensure reliable operation.

Considerations include ambient temperature, airflow, module power dissipation, and the need for increased reliability. A reduction in the operating temperature of the module will result in an increase in reliability. The thermal data presented here is based on physical measurements taken in a wind tunnel. The test set-up is shown in Figure

48. The preferred airflow direction for the module is in Figure 49.

The thermal reference points, T

used in the specifications

ref

are also shown in Figure 49. For reliable operation the temperatures at these points should not exceed 130oC. The output power of the module should not exceed the rated power of the module (Vo,set x Io,max).

Please refer to the Application Note “Thermal Characterization Process For Open-Frame Board-Mounted Power Modules” for a detailed discussion of thermal aspects including maximum device temperatures.

Figure 49. Preferred airflow direction and location of hotspot of the module (Tref).

GE

Data Sheet

20A Digital MicroDLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 20A Output Current

April 24, 2013

Page 34

Frequency (Hz)

PSD Level

(G2/Hz)

Frequency (Hz)

PSD Level

(G2/Hz)

Frequency (Hz)

PSD Level

(G2/Hz)

10

1.14E-03

170

2.54E-03

690

1.03E-03

30

5.96E-03

230

3.70E-03

800

7.29E-03

40

9.53E-04

290

7.99E-04

890

1.00E-03

50

2.08E-03

340

1.12E-02

1070

2.67E-03

90

2.08E-03

370

1.12E-02

1240

1.08E-03

110

7.05E-04

430

8.84E-04

1550

2.54E-03

130

5.00E-03

490

1.54E-03

1780

2.88E-03

140

8.20E-04

560

5.62E-04

2000

5.62E-04

Frequency (Hz)

PSD Level

(G2/Hz)

Frequency (Hz)

PSD Level

(G2/Hz)

Frequency (Hz)

PSD Level

(G2/Hz)

10

0.00803

170

0.01795

690

0.00727

30

0.04216

230

0.02616

800

0.05155

40

0.00674

290

0.00565

890

0.00709

50

0.01468

340

0.07901

1070

0.01887

90

0.01468

370

0.07901

1240

0.00764

110

0.00498

430

0.00625

1550

0.01795

130

0.03536

490

0.01086

1780

0.02035

140

0.0058

560

0.00398

2000

0.00398

Shock and Vibration

The ruggedized (-D version) of the modules are designed to withstand elevated levels of shock and vibration to be able to operate in harsh environments. The ruggedized modules have been successfully tested to the following conditions:

Non operating random vibration:

Random vibration tests conducted at 25C, 10 to 2000Hz, for 30 minutes each level, starting from 30Grms (Z axis) and up to 50Grms (Z axis). The units were then subjected to two more tests of 50Grms at 30 minutes each for a total of 90 minutes.

Operating shock to 40G per Mil Std. 810F, Method 516.4 Procedure I:

The modules were tested in opposing directions along each of three orthogonal axes, with waveform and amplitude of the shock impulse characteristics as follows:

All shocks were half sine pulses, 11 milliseconds (ms) in duration in all 3 axes.

Units were tested to the Functional Shock Test of MIL-STD-810, Method 516.4, Procedure I - Figure 516.4-4. A shock magnitude of 40G was utilized. The operational units were subjected to three shocks in each direction along three axes for a total of eighteen shocks.

Operating vibration per Mil Std 810F, Method 514.5 Procedure I:

The ruggedized (-D version) modules are designed and tested to vibration levels as outlined in MIL-STD-810F, Method 514.5, and Procedure 1, using the Power Spectral Density (PSD) profiles as shown in Table 7 and Table 8 for all axes. Full compliance with performance specifications was required during the performance test. No damage was allowed to the module and full compliance to performance specifications was required when the endurance environment was removed. The module was tested per MIL-STD810, Method 514.5, Procedure I, for functional (performance) and endurance random vibration using the performance and endurance levels shown in Table 7 and Table 8 for all axes. The performance test has been split, with one half accomplished before the endurance test and one half after the endurance test (in each axis). The duration of the performance test was at least 16 minutes total per axis and at least 120 minutes total per axis for the endurance test. The endurance test period was 2 hours minimum per axis.

Table 7: Performance Vibration Qualification - All Axes

Table 8: Endurance Vibration Qualification - All Axes

GE

Data Sheet

20A Digital MicroDLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 20A Output Current

April 24, 2013

Page 35

RADDR0

DATA

SEQ

VS-

RADDR1

GND

Vin+

CI3

CO3

ADDR0

VOUT

VS+

GND

TRIM

CTUNE

RTUNE

RTrim

VIN

CO1

CI1

Vout+

ON/OFF

SEQ

SMBALRT#

MODULE

PGOOD

ADDR1

SIG_GND

SYNC

CI2

CO2

Example Application Circuit

Requirements: Vin: 12V Vout: 1.8V Iout: 15A max., worst case load transient is from 10A to 15A Vout: 1.5% of Vout (27mV) for worst case load transient Vin, ripple 1.5% of Vin (180mV, p-p)

CI1 Decoupling cap - 1x0.047F/16V ceramic capacitor (e.g. Murata LLL185R71C473MA01) CI2 3x22F/16V ceramic capacitor (e.g. Murata GRM32ER61C226KE20) CI3 47F/16V bulk electrolytic CO1 Decoupling cap - 1x0.047F/16V ceramic capacitor (e.g. Murata LLL185R71C473MA01) CO2 N.A. CO3 3 x 330F/6.3V Polymer (e.g. Sanyo Poscap) CTune 4700pF ceramic capacitor (can be 1206, 0805 or 0603 size) RTune 330 ohms SMT resistor (can be 1206, 0805 or 0603 size) RTrim 10k SMT resistor (can be 1206, 0805 or 0603 size, recommended tolerance of 0.1%)

Note: The DATA, CLK and SMBALRT pins do not have any pull-up resistors inside the module. Typically, the SMBus master controller will have the pull-up resistors as well as provide the driving source for these signals.

GE

Data Sheet

20A Digital MicroDLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 20A Output Current

April 24, 2013

Page 36

FUNCTION

1

ON/OFF

10

SYNC1

2

VIN

11

CLK

3

SEQ

12

DATA

4

GND

13

SMBALERT#

5

TRIM

14

SIG_GND

6

VOUT

15

ADDR1

7

VS+

16

ADDR0

8

VS- 9 PG

Mechanical Outline

Dimensions are in millimeters and (inches). Tolerances: x.x mm  0.5 mm (x.xx in.  0.02 in.) [unless otherwise indicated] x.xx mm  0.25 mm (x.xxx in  0.010 in.)

1

If unused, connect to Ground.

GE

Data Sheet

20A Digital MicroDLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 20A Output Current

April 24, 2013

Page 37

FUNCTION

1

ON/OFF

10

SYNC2

2

VIN

11

CLK

3

SEQ

12

DATA

4

GND

13

SMBALERT#

5

TRIM

14

SIG_GND

6

VOUT

15

ADDR1

7

VS+

16

ADDR0

8

VS-

9

PG

Recommended Pad Layout

Dimensions are in millimeters and (inches). Tolerances: x.x mm  0.5 mm (x.xx in.  0.02 in.) [unless otherwise indicated] x.xx mm  0.25 mm (x.xxx in  0.010 in.)

2

If unused, connect to Ground.

GE

Data Sheet

20A Digital MicroDLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 20A Output Current

April 24, 2013

Page 38

Packaging Details

The 12V Digital MicroDLynxTM 20A modules are supplied in tape & reel as standard. Modules are shipped in quantities of 200 modules per reel.

All Dimensions are in millimeters and (in inches).

Reel Dimensions: Outside Dimensions: 330.2 mm (13.00) Inside Dimensions: 177.8 mm (7.00”) Tape Width: 44.00 mm (1.732”)

GE

Data Sheet

20A Digital MicroDLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 20A Output Current

April 24, 2013

Page 39

Per J-STD-020 Rev. C

0

50

100

150

200

250

300

Reflow Time (Seconds)

Reflow Temp (°C)

Heating Zone 1°C/Second

Peak Temp 260°C * Min. Time Above 235°C

15 Seconds

*Time Above 217°C

60 Seconds

Cooling Zone

Surface Mount Information

Pick and Place

The 20A Digital MicroDLynxTM modules use an open frame construction and are designed for a fully automated assembly process. The modules are fitted with a label designed to provide a large surface area for pick and place operations. The label meets all the requirements for surface mount processing, as well as safety standards, and is able to withstand reflow temperatures of up to 300oC. The label also carries product information such as product code, serial number and the location of manufacture.

Nozzle Recommendations

The module weight has been kept to a minimum by using open frame construction. Variables such as nozzle size, tip style, vacuum pressure and placement speed should be considered to optimize this process. The minimum recommended inside nozzle diameter for reliable operation is 3mm. The maximum nozzle outer diameter, which will safely fit within the allowable component spacing, is 7 mm.

Bottom Side / First Side Assembly

This module is not recommended for assembly on the bottom side of a customer board. If such an assembly is attempted, components may fall off the module during the second reflow process.

Lead Free Soldering

The modules are lead-free (Pb-free) and RoHS compliant and fully compatible in a Pb-free soldering process. Failure to observe the instructions below may result in the failure of or cause damage to the modules and can adversely affect long-term reliability.

Devices). Moisture barrier bags (MBB) with desiccant are required for MSL ratings of 2 or greater. These sealed packages should not be broken until time of use. Once the original package is broken, the floor life of the product at conditions of  30°C and 60% relative humidity varies according to the MSL rating (see J-STD-033A). The shelf life for dry packed SMT packages will be a minimum of 12 months from the bag seal date, when stored at the following conditions: < 40° C, < 90% relative humidity.

Figure 50. Recommended linear reflow profile using Sn/Ag/Cu solder.

Post Solder Cleaning and Drying Considerations

Post solder cleaning is usually the final circuit-board assembly process prior to electrical board testing. The result of inadequate cleaning and drying can affect both the reliability of a power module and the testability of the finished circuit-board assembly. For guidance on appropriate soldering, cleaning and drying procedures, refer to Board Mounted Power Modules: Soldering and Cleaning Application Note (AN04-001).

Pb-free Reflow Profile

Power Systems will comply with J-STD-020 Rev. C (Moisture/Reflow Sensitivity Classification for Nonhermetic Solid State Surface Mount Devices) for both Pb-free solder profiles and MSL classification procedures. This standard provides a recommended forced-air-convection reflow profile based on the volume and thickness of the package (table 4-2). The suggested Pb-free solder paste is Sn/Ag/Cu (SAC). For questions regarding Land grid array(LGA) soldering, solder volume; please contact Lineage Power for special manufacturing process instructions. The recommended linear reflow profile using Sn/Ag/Cu solder is shown in Fig. 50. Soldering outside of the recommended profile requires testing to verify results and performance.

MSL Rating

The 20A Digital MicroDLynxTM modules have a MSL rating of 2a.

Storage and Handling

The recommended storage environment and handling procedures for moisture-sensitive surface mount packages is detailed in J-STD-033 Rev. A (Handling, Packing, Shipping and Use of Moisture/Reflow Sensitive Surface Mount

GE

Data Sheet

20A Digital MicroDLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 20A Output Current

Contact Us

For more information, call us at

USA/Canada:

+1 888 546 3243, or +1 972 244 9288

Asia-Pacific:

+86.021.54279977*808

Europe, Middle-East and Africa:

+49.89.74423-206

India: +91.80.28411633

www.ge.com/powerelectronics

April 24, 2013

Version 1.04

Device Code

Input

Voltage Range

Output

Voltage

Output

Current

On/Off

Logic

Sequencing

Comcodes

UDT020A0X3-SRZ

3 – 14.4Vdc

0.45 – 5.5Vdc

20A

Negative

Yes

CC109159728

UDT020A0X3-SRDZ

3 – 14.4Vdc

0.45 – 5.5Vdc

20A

Negative

Yes

CC109168745

UDT020A0X43-SRZ

3 – 14.4Vdc

0.45 – 5.5Vdc

20A

Positive

Yes

CC109159736

Package

Identifier

Family

Sequencing

Option

Output

current

Output

voltage

On/Off

logic

Remote

Sense

Options

ROHS

Compliance

U D T

020A0 X 3 -SR

-D

Z

P=Pico

U=Micro

M=Mega

G=Giga

D=Dlynx

Digital

V =

DLynx

Analog.

T=with EZ Sequence

X=without

sequencing

20A

X =

programm

able output

4 =

positive

No entry

=

negative

3 =

Remote

Sense

S =

Surface

Mount

R =

Tape &

Reel

D = 105°C

operating

ambient,

40G

operating

shock as

per MIL Std

810F

Z = ROHS6

Ordering Information

Please contact your GE Sales Representative for pricing, availability and optional features.

Table 9. Device Codes

-Z refers to RoHS compliant parts

Table 10. Coding Scheme

GE Digital Non-Isolated DC-DC products use technology licensed from Power-One, protected by US patents: US20040246754, US2004090219A1, US2004093533A1, US2004123164A1,

US2004123167A1, US2004178780A1, US2004179382A1, US20050200344, US20050223252, US2005289373A1, US20060061214, US2006015616A1, US20060174145, US20070226526, US20070234095, US20070240000, US20080052551, US20080072080, US20080186006, US6741099, US6788036, US6936999, US6949916, US7000125, US7049798, US7068021, US7080265, US7249267, US7266709, US7315156, US7372682, US7373527, US7394445, US7456617, US7459892, US7493504, US7526660. Outside the US the Power-One licensed technology is protected by patents: AU3287379AA, AU3287437AA, AU3290643AA, AU3291357AA, CN10371856C, CN1045261OC, CN10458656C, CN10459360C, CN10465848C, CN11069332A, CN11124619A, CN11346682A, CN1685299A, CN1685459A, CN1685582A, CN1685583A, CN1698023A, CN1802619A, EP1561156A1, EP1561268A2, EP1576710A1, EP1576711A1, EP1604254A4, EP1604264A4, EP1714369A2, EP1745536A4, EP1769382A4, EP1899789A2, EP1984801A2, W004044718A1, W004045042A3, W004045042C1, W004062061 A1, W004062062A1, W004070780A3, W004084390A3, W004084391A3, W005079227A3, W005081771A3, W006019569A3, W02007001584A3, W02007094935A3

GE Industrial Solutions 20A Digital MicroDLynx User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual