GE Industrial Solutions 12A Digital Dual Output MicroDLynx User Manual

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Datasheet

2 × 12A Digital Dual Output MicroDLynxTM: Non-Isolated DC-DC Power Modules

4.5Vdc –14.4Vdc input; 0.51Vdc to 5.5Vdc output; 2 × 12A Output Current

Features

 Wide Input voltage range (4.5Vdc-14.4Vdc)

 Each Output voltage programmable from 0.6Vdc to

5.5Vdc via external resistor. Digitally adjustable down to 0.51Vdc

 Small size: 20.32 mm x 11.43 mm x 8.5 mm

(0.8 in x 0.45 in x 0.335 in)

RoHS Compliant

Applications

 Distributed power architectures

 Intermediate bus voltage applications

 Telecommunications equipment

 Servers and storage applications

 Networking equipment

 Industrial equipment

Vin+

CI2

CI3

CI1

GND

VIN1

PGOO D1

MODULE

SYNC

CLK

DA TA SMBALRT#

ON/OFF1

PGND

ON/OFF2

PGOO D2

VIN2

VOUT1

VS+1

TRIM1

ADDR0

ADDR1

SIG_GND

PGND

TRIM2

VS+2

VOUT2

RADDR1

RTUNE1

CTUNE2

RTrim1

RADDR0

RTrim2

RTUNE2

CTUNE2

Vout+

CO1

CO3

CO2

CO4

Description

The 2 × 12A Digital Dual MicroDlynxTM power modules are non-isolated dc-dc converters that can deliver up to 2 × 12A of output current. These modules operate over a wide range of input voltage (V voltages from 0.51Vdc to 5.5Vdc, programmable via an external resistor and PMBus control. Features include a digital interface using the PMBus protocol, remote On/Off, adjustable output voltage, over current and over temperature protection. The PMBus interface supports a range of commands to both control and monitor the module. The module also includes the Tunable Loop 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)

 Wide operating temperature range -40°C to 85°C

TM #

 Digital interface through the PMBus

 Tunable Loop

to optimize dynamic output voltage

protocol

response

 Power Good signal for each output

 Fixed switching frequency with capability of external

synchronization

 180° Out-of-phase to reduce input ripple

 Output overcurrent protection (non-latching)

 Output Overvoltage protection

 Over temperature protection

 Remote On/Off

 Ability to sink and source current

 Start up into Pre-biased output

 Cost efficient open frame design

 Compliant to RoHS II EU “Directive 2011/65/EU”

 Compatible in a Pb-free or SnPb reflow environment

 Compliant to REACH Directive (EC) No 1907/2006

 Compliant to IPC-9592 (September 2008), Category 2,

Class II

 UL* 60950-1 2

60950-1-07 Certified, and VDE

Ed. Recognized, CSA† C22.2 No.

‡

(EN60950-1 2nd Ed.)

Licensed

 ISO** 9001 and ISO 14001 certified manufacturing

facilities

= 4.5Vdc-14.4Vdc) and provide precisely regulated output

Datasheet

2 × 12A Digital Dual MicroDlynxTM: Non-Isolated DC-DC Power Modules

4.5Vdc –14.4Vdc input; 0.51Vdc to 5.5Vdc output; 2 × 12A Output Current

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.

Parameter Device Symbol Min Max Unit

Input Voltage All V

Continuous

VS+1, VS+2, SMBALERT# All -0.3 7 V

CLK, DATA, SYNC, All -0.3 3.6 V

Operating Ambient Temperature All T

(see Thermal Considerations section)

Storage Temperature All T

Electrical Specifications

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

Parameter Device Symbol Min Typ Max Unit

Operating Input Voltage All

Maximum Input Current All

(VIN=3V to 14.4V, IO=I

Input No Load Current

= 12Vdc, IO = 0, module enabled)

Input Stand-by Current

= 12Vdc, module disabled)

Inrush Transient All I

Input Reflected Ripple Current, peak-to-peak (5Hz to 20MHz, 1H source impedance; V I

= I

; See Test Configurations)

Omax

Input Ripple Rejection (120Hz) All

)

O, max

= 0.6 Vdc

O,set

= 5.5Vdc

O,set

All

=4.5 to 14V,

All

and V

IN1

IN2

stg

and

IN1

IN2

IN1,max &

IN2,max

IN1,No load &

IN2,No load

IN,1No load &

IN2,No load

IN1,stand-by &

IN2,stand-by

t & I

t 1 A2s

Both Inputs

-0.3 15 V

-40 85 °C

-55 125 °C

4.5

⎯

23 Adc

72 mA

210 mA

14 mA

25 mAp-p

-68 dB

14.4 Vdc

Datasheet

2 × 12A Digital Dual MicroDlynxTM: Non-Isolated DC-DC Power Modules

4.5Vdc –14.4Vdc input; 0.51Vdc to 5.5Vdc output; 2 × 12A Output Current

Electrical Specifications (continued)

Parameter Device Symbol Min Typ Max Unit

Output Voltage Set-point (with 0.1% tolerance for external resistor used to set output voltage) Output Voltage (Over all operating input voltage, resistive load, and temperature conditions until end of life)

All

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

All VO1 & VO2 0.6* 5.5 Vdc

*0.51V possible through PMBus command

PMBus Adjustable Output Voltage Range All VO1,adj, VO2,adj -15 0 +10 %V

PMBus Output Voltage Adjustment Step Size All Both outputs 0.4 %V

Remote Sense Range All Both outputs 0.5 Vdc

Output Regulation (for VO  2.5Vdc) Both Outputs

Line (VIN=V

Load (IO=I

IN, min

O, min

to V

) All Both Outputs

IN, max

to I

) All Both Outputs

O, max

Output Regulation (for VO < 2.5Vdc)

Line (VIN=V

Load (IO=I

Temperature (T

IN, min

O, min

to V

) All Both Outputs

IN, max

to I

) All Both Outputs

O, max

to T

ref=TA, min

) All Both Outputs

A, max

Output Ripple and Noise on nominal output at 25°C

(VIN=V output)

IN, nom

and IO=I

O, min

to I

Co = 2×0.1 + 2×47uF per

O, max

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

RMS (5Hz to 20MHz bandwidth) All 20 38 mV

External Capacitance1

Without the Tunable Loop

ESR  1 m All C

With the Tunable Loop

ESR  0.15 m All C

ESR  10 m All C

Output Current (in either sink or source mode) All I

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

All I

Output Short-Circuit Current All I

(VO250mV) ( Hiccup Mode )

Efficiency V

VIN= 12Vdc, TA=25°C V

IO=I

O, max , VO

= V

O,set

= 0.6Vdc  1,  2 79 %

O,set

= 1.2Vdc  1,  2 88 %

O, set

= 1.8Vdc  1,  2 91 %

O,set

= 2.5Vdc  1,  2 93 %

O,set

= 3.3Vdc  1,  2 94 %

O, set

= 5.0Vdc  1,  2 95 %

O,set

Switching Frequency All f

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 Loop

section for details.

VO1, set & VO2, set Vo1, set & VO2, set

O, max

O, lim

, I

O1, s/c

-1.0 +1.0

-3.0

⎯

50 100 mV

+3.0

+0.4 % V

10 mV

5 mV

10 mV

0.4 % V

2×47

⎯

2×47 F

1000 F

5000 F

0 12x2 Adc

150 % I

6 Arms

500

⎯

% VO,

set

% VO,

set

O,set

O, set

pk-pk

rms

o,max

kHz

Datasheet

2 × 12A Digital Dual MicroDlynxTM: Non-Isolated DC-DC Power Modules

4.5Vdc –14.4Vdc input; 0.51Vdc to 5.5Vdc output; 2 × 12AOutput Current

Electrical Specifications (continued)

Parameter Device Symbol Min Typ Max Unit

Frequency Synchronization All

Synchronization Frequency Range All -20% +20% kHz

High-Level Input Voltage All VIH 2.0 V

Low-Level Input Voltage All VIL 0.4 V

Input Current, SYNC All ISYNC 100 nA

Minimum Pulse Width, SYNC All tSYNC 100 ns

Maximum SYNC rise time All tSYNC_SH 100 ns

General Specifications

Parameter Device Min Typ Max Unit

Calculated MTBF (IO=0.8I

Weight

, TA=40°C) Telecordia Issue 2 Method 1 Case 3 All 75,767,425 Hours

O, max

⎯

4.5 (0.16)

⎯

g (oz.)

Feature Specifications

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

Parameter Device Symbol Min Typ Max Unit

On/Off Signal Interface

(VIN=V

Signal referenced to GND)

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 IIH1, IIH2 — — 1 mA

Input High Voltage All VIH1, VIH2 2 — V

Logic Low (Module ON)

Input low Current All IIL1, IIL2 — — 20 A

Input Low Voltage All VIL1, VIL2 -0.2 — 0.6 Vdc

Turn-On Delay and Rise Times

(VIN=V

Case 1: On/Off input is enabled and then input power is applied (delay from instant at which V 10% of V

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 V

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

Output voltage overshoot (TA = 25oC V

With or without maximum external capacitance

= V

IN, min

IN, nom

IN, min

to V

, IO=I

o, set)

to V

; open collector or equivalent,

IN, max

to within ±1% of steady state)

O, max , VO

Tdelay1, Tdelay2

Trise2

Both

Outputs

— 2 — msec

— 800 —

— 5 — msec

3.0 % V

IN, max,IO

= V

until Vo =

IN, min

o = 10% of Vo, set)

All

All Trise1,

= I

to I

O, min

O, max

)

Vdc

IN, max

μsec

O, set

Datasheet

2 × 12A Digital Dual MicroDlynxTM: Non-Isolated DC-DC Power Modules

4.5Vdc –14.4Vdc input; 0.51Vdc to 5.5Vdc output; 2 × 12A Output Current

Feature Specifications (cont.)

Parameter Device Symbol Min Typ Max Units

Over Temperature Protection (See Thermal Considerations section)

PMBus Over Temperature Warning Threshold* All T

Input Undervoltage Lockout

All T

ref

WARN

Turn-on Threshold All Both Inputs 4.5 Vdc

Turn-off Threshold All Both Inputs

Hysteresis All Both Inputs

PMBus Adjustable Input Under Voltage Lockout Thresholds All Both Inputs

Resolution of Adjustable Input Under Voltage Threshold All Both Inputs

PGOOD (Power Good)

135 °C

125 °C

4.25 Vdc

0.15 0.2 Vdc

4 14 Vdc

250 mV

Signal Interface Open Drain, V

supply

≤ 5VDC

Overvoltage threshold for PGOOD ON All Both Outputs 108.33 %V

Overvoltage threshold for PGOOD OFF All Both Outputs

Undervoltage threshold for PGOOD ON All Both Outputs

Undervoltage threshold for PGOOD OFF All Both Outputs

Pulldown resistance of PGOOD pin All Both Outputs

Sink current capability into PGOOD pin All Both Outputs

112.5 %V

91.67 %V

87.5 %V

40 70

5 mA

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

O, set

Datasheet

2 × 12A Digital Dual MicroDlynxTM: Non-Isolated DC-DC Power Modules

4.5Vdc –14.4Vdc input; 0.51Vdc to 5.5Vdc output; 2 × 12AOutput Current

Digital Interface Specifications

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

Parameter Conditions Symbol Min Typ Max Unit

PMBus Signal Interface Characteristics

Input High Voltage (CLK, DATA) VIH 2.1 V

Input Low Voltage (CLK, DATA) VIL 0.8 V

Input high level current (CLK, DATA) IIH -10 10 A

Input low level current (CLK, DATA) IIL -10 10 mA

Output Low Voltage (CLK, DATA, SMBALERT#) I

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

Pin capacitance CO 0 1 pF

PMBus Operating frequency range Slave Mode FPMB 10 400 kHz

Data hold time

Data setup time

Measurement System Characteristics

Output current measurement range

Output current measurement gain accuracy (at 25°C)

measurement range

OUT

measurement accuracy

OUT

=2mA VOL 0.4? V

OUT

=3.6V I

OUT

Receive Mode

Transmit Mode

tSU:DAT

tHD:DAT

RNG

ACC

OUT(rng)

0 10 A

300

250 ns

0 18 A

±1 A

0.5 5.8 V

-2 2 %

Datasheet

2 × 12A Digital Dual MicroDlynxTM: Non-Isolated DC-DC Power Modules

4.5Vdc –14.4Vdc input; 0.51Vdc to 5.5Vdc output; 2 × 12A Output Current

Characteristic Curves

The following figures provide typical characteristics for the 2 × 12A Digital Dual MicroDlynxTM at 0.6Vo and 25oC.

EFFICIENCY, η (%)

Vin=4.5V

Vin=12V

2x0 2x2 2x4 2x6 2x8 2x10 2x12

OUTPUT CURRENT, IO (A) AMBIENT TEMPERATURE, TA OC

Vin=14V

Figure 1. Converter Efficiency versus Output Current.

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

Derating curve applies

to Both Outputs

OUTPUT CURRENT, Io (A)

55 60 65 70 75 80 85

(V) (30mV/div)

OUTPUT VOLTAGES

TIME, t (1μs/div) TIME, t (20μs /div)

Figure 3. Typical output ripple and noise (CO=

2×0.1uF+2×47uF ceramic, V

(V) (5V/div)

ON/OFF

(V) (200mV/div) V

= 12V, Io = I

o1,max, Io2,max,

(20mV/div)

(A) (5Adiv) V

OUTPUT CURRENT, OUTPUT VOLTAGE

Figure 4. Transient Response to Dynamic Load Change from

50% to 100% on one output at 12Vin, Cout=2x47uF+7x330uF

CTune=12nF, RTune=300

(V) (10V/div)

(V) (200mV/div) V

OUTPUT VOLTAGES ON/OFF VOLTAGE

Figure 5. Typical Start-up Using On/Off Voltage (Vin=12V, Io=

o1,max, Io2,max,

TIME, t (2ms/div) TIME, t (2ms/div)

OUTPUT VOLTAGES INPUT VOLTAGE

Figure 6. Typical Start-up Using Input Voltage (V

o1,max, Io2,max,

= 12V, Io=

Datasheet

2 × 12A Digital Dual MicroDlynxTM: Non-Isolated DC-DC Power Modules

4.5Vdc –14.4Vdc input; 0.51Vdc to 5.5Vdc output; 2 × 12AOutput Current

Characteristic Curves

The following figures provide typical characteristics for the 2 × 12A Digital Dual MicroDlynxTM at 1.2Vo and 25oC.

EFFICIENCY, η (%)

Vin=4.5V

Vin=14V

Vin=12V

2x0 2x2 2x4 2x6 2x8 2x10 2x12

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.

Derating curve applies

to Both Outputs

OUTPUT CURRENT, Io (A)

55 60 65 70 75 80 85

0.5m/s

(100LFM)

(V) (30mV/div)

OUTPUT VOLTAGES

TIME, t (1μs/div) TIME, t (20μs /div)

Figure 9. Typical output ripple and noise (CO= 2×0.1uF+2×47uF ceramic, V

(V) (5V/div)

ON/OFF

(V) (500mV/div) V

= 12V, Io = I

o1,max, Io2,max

(20mV/div)

(A) (5Adiv) V

OUTPUT CURRENT, OUTPUT VOLTAGE

Figure 10. Transient Response to Dynamic Load Change on

one output from 50% to 100% at 12Vin, Cout=3x47uF+3x330uF, CTune=2700pF & RTune=300

(V) (10V/div)

(V) (500mV/div) V

OUTPUT VOLTAGES ON/OFF VOLTAGE

Figure 1. Typical Start-up Using On/Off Voltage (VIN= 12V, I = I

o1,max, Io2,max

TIME, t (2ms/div) TIME, t (2ms/div)

OUTPUT VOLTAGES INPUT VOLTAGE

Figure 12. Typical Start-up Using Input Voltage (V I

o1,max, Io2,max

= 12V, Io=

Datasheet

2 × 12A Digital Dual MicroDlynxTM: Non-Isolated DC-DC Power Modules

4.5Vdc –14.4Vdc input; 0.51Vdc to 5.5Vdc output; 2 × 12A Output Current

Characteristic Curves

The following figures provide typical characteristics for the 2 × 12A Digital Dual MicroDlynxTM at 1.8Vo and 25oC.

100

EFFICIENCY, η (%)

2x0 2x2 2x4 2x6 2 x8 2x10 2x12

Vin=4.5V

Vin=12V

OUTPUT CURRENT, IO (A) AMBIENT TEMPERATURE, TA OC

Vin=14V

Figure 13. Converter Efficiency versus Output Current.

Derating curve applies

to Both Outputs

OUTPUT CURRENT, Io (A)

55 65 75 85

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

1.0m/s

(200LFM)

0.5m/s

(100LFM)

(V) (30mV/div)

OUTPUT VOLTAGES

TIME, t (1μs/div) TIME, t (20μs /div)

Figure 15. Typical output ripple and noise (CO=

2×0.1uF+2×47uF ceramic, V

(V) (5V/div)

ON/OFF

(V) (500mV/div) V

= 12V, Io = I

o1,max, Io2,max

(20mV/div)

(A) (5Adiv) V

OUTPUT CURRENT, OUTPUT VOLTAGE

Figure 16. Transient Response to Dynamic Load Change on

one output from 50% to 100% at 12Vin, Cout = 3x47uF+2x330uF, CTune = 1800pF & RTune = 300

(V) (10V/div)

(V) (500mV/div) V

OUTPUT VOLTAGES ON/OFF VOLTAGE

Figure 17. Typical Start-up Using On/Off Voltage (VIN= 12V, I = I

o1,max, Io2,max

TIME, t (2ms/div) TIME, t (2ms/div)

OUTPUT VOLTAGES INPUT VOLTAGE

Figure 18. Typical Star I

o1,max, Io2,max

-up Using Input Voltage (VIN= 12V, Io=

Datasheet

2 × 12A Digital Dual MicroDlynxTM: Non-Isolated DC-DC Power Modules

4.5Vdc –14.4Vdc input; 0.51Vdc to 5.5Vdc output; 2 × 12AOutput Current

Characteristic Curves

The following figures provide typical characteristics for the 2 × 12A Digital Dual MicroDlynxTM at 2.5Vo and 25oC.

100

EFFICIENCY, η (%)

Vin=4.5V

Vin=12V

2x0 2x2 2x4 2x6 2 x8 2x10 2x12

OUTPUT CURRENT, IO (A) AMBIENT TEMPERATURE, TA OC

Vin=14V

Figure 19. Converter Efficiency versus Output Current.

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

Derating curve applies

to Both Outputs

OUTPUT CURRENT, Io (A)

55 65 75 85

1m/s

(200LFM)

0.5m/s

(100LFM)

(V) (30mV/div)

OUTPUT VOLTAGES

TIME, t (1μs/div) TIME, t (20μs /div)

Figure 21. Typical output ripple and noise (CO= 2x0.1uF+2x47uF ceramic, V

(V) (5V/div)

ON/OFF

(V) (1V/div) V

= 12V, Io = I

o1,max, Io2,max

(50mV/div)

(A) (5Adiv) V

OUTPUT CURRENT, OUTPUT VOLTAGE

Figure 22. Transient Response to Dynamic Load Change on

one output from 50% to 100% at 12Vin, Cout=3x47uF+2x330uF, CTune=1500pF & RTune = 300

(V) (10V/div)

(V) (1V/div) V

OUTPUT VOLTAGES ON/OFF VOLTAGE

Figure 23. Typical Start-up Using On/Off Voltage (VIN= 12V, I = I

o1,max, Io2,max

TIME, t (2ms/div) TIME, t (2ms/div)

OUTPUT VOLTAGES INPUT VOLTAGE

Figure 24. Typical Star I

o1,max, Io2,max

-up Using Input Voltage (VIN= 12V, Io=

Datasheet

2 × 12A Digital Dual MicroDlynxTM: Non-Isolated DC-DC Power Modules

4.5Vdc –14.4Vdc input; 0.51Vdc to 5.5Vdc output; 2 × 12A Output Current

Characteristic Curves

The following figures provide typical characteristics for the 2 × 12A Digital Dual MicroDlynxTM at 3.3Vo and 25oC.

100

Vin=4.5V

EFFICIENCY, η (%)

2x0 2x2 2x4 2x6 2 x8 2x10 2x12

Vin=12V

OUTPUT CURRENT, IO (A) AMBIENT TEMPERATURE, TA OC

Vin=14V

Figure 25. Converter Efficiency versus Output Current.

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

Derating curve applies

to Both Outputs

OUTPUT CURRENT, Io (A)

55 65 75 85

1m/s

(200LFM)

0.5m/s

(100LFM)

1.5m/s

(300LFM)

(V) (30mV/div)

OUTPUT VOLTAGES

TIME, t (1μs/div) TIME, t (20μs /div)

Figure 27. Typical output ripple and noise (CO=

2x0.1uF+2x47uF ceramic, V

(V) (5V/div)

ON/OFF

(V) (1V/div) V

= 12V, Io = I

o1,max, Io2,max

(V) (50mV/div)

(A) (5Adiv) V

OUTPUT CURRENT, OUTPUT VOLTAGE

Figure 28 Transient Response to Dynamic Load Change on

one output from 50% to 100% at 12Vin, Cout=3x47uF+1x330uF, CTune = 1200pF & RTune = 300

(V) (10V/div)

(V) (1V/div) V

OUTPUT VOLTAGES ON/OFF VOLTAGE

Figure 29. Typical Start-up Using On/Off Voltage (VIN= 12V, I = I

o1,max, Io2,max

TIME, t (2ms/div) TIME, t (2ms/div)

OUTPUT VOLTAGES INPUT VOLTAGE

Figure 30. Typical Start-up Using Input Voltage (V I

o1,max, Io2,max

= 12V, Io=

Datasheet

2 × 12A Digital Dual MicroDlynxTM: Non-Isolated DC-DC Power Modules

4.5Vdc –14.4Vdc input; 0.51Vdc to 5.5Vdc output; 2 × 12AOutput Current

Characteristic Curves

The following figures provide typical characteristics for the 2 × 12A Digital Dual MicroDlynxTM at 5Vo and 25oC.

100

EFFICIENCY, η (%)

Figure 31. Converter Efficiency versus Output Current.

Vin=7V

Vin=12V

2x0 2x2 2x4 2x6 2 x8 2x10 2x12

OUTPUT CURRENT, IO (A) AMBIENT TEMPERATURE, TA OC

Vin=14V

OUTPUT CURRENT, Io (A)

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

(V) (30mV/div)

OUTPUT VOLTAGES

TIME, t (1μs/div) TIME, t (20μs /div)

Figure 33. Typical output ripple and noise (C 2×47uF ceramic, V

(V) (5V/div)

ON/OFF

(V) (2V/div) V

= 12V, Io = I

o1,max, Io2,max

= 2×0.1uF +

(50mV/div)

(A) (5Adiv) V

OUTPUT CURRENT, OUTPUT VOLTAGE

Figure 34. Transient Response to Dynamic Load Change on one output from 50% to 100% at 12Vin, Cout=6x47uF, CTune=470pF & RTune=300

(V) (10V/div)

(V) (2V/div) V

OUTPUT VOLTAGES ON/OFF VOLTAGE

Figure 35. Typical Start-up Using On/Off Voltage (VIN = 12V, Io

o1,max, Io2,max

= I

TIME, t (2ms/div) TIME, t (2ms/div)

OUTPUT VOLTAGES INPUT VOLTAGE

Figure 36. Typical Start-up Using Input Voltage (V

o1,max, Io2,max

= 12V, Io =

Datasheet

2 × 12A Digital Dual MicroDlynxTM: Non-Isolated DC-DC Power Modules

4.5Vdc –14.4Vdc input; 0.51Vdc to 5.5Vdc output; 2 × 12A Output Current

Design Considerations

Input Filtering

The2 × 12A Digital Dual 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 at2 x 12A of load current with 2x22 µF or 3x22 µF ceramic capacitors and an input of 12V.

200

150

100

Ripple (mVp-p)

0.511.522.533.544.55

Figure 37. Input ripple voltage for various output voltages with 4x22 µF or 6x22 µF ceramic capacitors at the input (2 x 12A 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 22 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 of2 x 12A. 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 Loop feature described later in this data sheet.

4x22uF

6x22uF

Output Voltage(Volts)

2x47uF each output

3x47uF each output

4x47uF each output

Ripple (mVp-p)

0.51.52.53.54.5

Output Voltage(Volts)

Figure 38. Output ripple voltage for various output voltages with total external 4x47 µF, 6x47 µF or 8x47 µF ceramic capacitors at the output (2 x 12A 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.

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 input to these units is to be provided with a fast-acting fuse with a maximum rating of 30A in the positive input

. (Littelfuse 456 Series or equivalent)

lead

Datasheet

2 × 12A Digital Dual MicroDlynxTM: Non-Isolated DC-DC Power Modules

4.5Vdc –14.4Vdc input; 0.51Vdc to 5.5Vdc output; 2 × 12AOutput Current

Analog Feature Descriptions

Remote On/Off

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

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

The2 × 12A Digital Dual 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. For negative logic On/Off modules, the circuit configuration is shown in Fig. 40.

Digital On/Off

Please see the Digital Feature Descriptions section.

TBD

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

Output 1

+VI N

DUAL OUTPUT MODULE

Rpullup

ON/OF F1

ON/OFF1

22K

GND

+3. 3V

47K

ENABLE1

22K

Output 2

+VI N

DUAL OUTPUT MODULE

Rpullup

ON/OF F2

ON/OFF2

22K

GND

+3. 3V

47K

ENABLE2

22K

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 on either or both outputs as long as the prebias voltage is 0.5V less than the set output voltage.

Analog Output Voltage Programming

The output voltage of each output of the module shall be programmable to any voltage from 0.6dc to 5.5Vdc by connecting a resistor between the 2 Trims 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. 1. The Upper Limit curve shows that for output voltages lower than 1V, the input voltage must be lower than the maximum of 14.4V. If the module can operate at

14.4V below 1V then that is preferable over the existing upper curve. The Lower Limit curve shows that for output voltages higher than 0.6V, the input voltage needs to be larger than the minimum of 4.5V.

Datasheet

2 × 12A Digital Dual MicroDlynxTM: Non-Isolated DC-DC Power Modules

4.5Vdc –14.4Vdc input; 0.51Vdc to 5.5Vdc output; 2 × 12A Output Current

Input Voltage (v)

0.511.522.533.544.555.56

Upper

Lower

Output Voltage (V)

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

(+)

IN1

(+)

IN2

ON/OFF1

ON/OFF2

SIG_GND

VO1(+)

VO2(+)

VS+1

VS+2 TRIM1 TRIM2

GND

trim2

LOAD

trim1

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

Figure 42. Circuit configuration for programming output voltage using an external resistor.

Without an external resistor between Trim and SIG_GND pins, each output of the module will be 0.6Vdc.To calculate

Rtrim

the value of the trim resistor,

for a desired output

voltage, should be as per the following equation:

−





6.0



= k

Rtrim

 

()



Rtrim is the external resistor in k

is the desired output voltage.

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

Table 1

(V) Rtrim (K)

O, set

0.6 Open

0.9 40

1.0 30

1.2 20

1.5 13.33

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-) for each of the 2 outputs. The voltage drop between the sense pins and the VOUT and GND pins of the module should not exceed 0.5V. If there is an inductor being used on the module output, then the tunable loop feature of the module should be used to ensure module stability with the proposed sense point location. If the simulation tools and loop feature of the module are not being used, then the remote sense should always be connected before the inductor. The sense trace should also be kept away from potentially noisy areas of the board

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

and R

margin-up

margin. Please consult your local Lineage Power technical representative for additional details.

1.8 10

2.5 6.316

3.3 4.444

5.0 2.727

margin-down

MODULE

SIG_GND

, from the Trim pin

margin-up

margin-down

for a specific output voltage and %

Vo1

Trim1

Rtrim1

, from the Trim pin to

Rmargin-down

Rmargin-up

─

Datasheet

2 × 12A Digital Dual MicroDlynxTM: Non-Isolated DC-DC Power Modules

4.5Vdc –14.4Vdc input; 0.51Vdc to 5.5Vdc output; 2 × 12AOutput Current

Vo2

Rmargin-down

MODULE

Trim2

Rmargin-up

Rtrim1

SIG_GND

Figure 43. Circuit Configuration for margining Output voltage.

Digital Output Voltage Margining

Please see the Digital Feature Descriptions section.

Overcurrent Protection

To provide protection in a fault (output overload) condition, the unit is equipped with internal current-limiting circuitry on both outputs 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 135 exceeded at the thermal reference point T

C(typ) is

.Once the unit

ref

goes into thermal shutdown it will then wait to cool before attempting to restart.

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.

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.

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.

MODULE

SYNC

SIG_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.

Tunable Loop

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

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 Loop voltage control loop to match the filter network connected to the output of the module. The Tunable Loop implemented by connecting a series R-C between the VS+ and TRIM pins of the module, as shown in Fig. 47. This R-C allows the user to externally adjust the voltage loop feedback compensation of the module.

allows the user to externally adjust the

Datasheet

2 × 12A Digital Dual MicroDlynxTM: Non-Isolated DC-DC Power Modules

4.5Vdc –14.4Vdc input; 0.51Vdc to 5.5Vdc output; 2 × 12A Output Current

VOUT1

VS+1

MODULE

TRIM1

SIG_GND

GND

RTune

CTune

RTrim

VOUT2

VS+2

RTune

MODULE

TRIM2

CTune

RTrim

SIG_GND

GND

Figure. 47. Circuit diagram showing connection of R and C

to tune the control loop of the module.

TUNE

TUME

Table 2. General recommended values of of R

for Vin=12V and various external ceramic capacitor

TUNE

and

combinations.

3x47μF 4x47μF 6x47μF 10x47μF 20x47μF

TUNE

300 300 300 300 300

TUNE

220pF 330pF 1000pF 1800pF 3900pF

Table 3. Recommended values of R

TUNE

and C

TUNE

to obtain transient deviation of 2% of Vout for a 6A step load with Vin=12V.

Vo 5V 3.3V 2.5V 1.8V 1.2V 0.6V

3x47μF

2x330μF

Polymer

3x47μF +

2x330μF Polymer

6x47μF

TUNE

300 300 300 300 300 300

TUNE

470pF 1200pF 1500pF 1800pF 2700pF 12nF

ΔV

84mV 39mV 30mV 27mV 20mV 10mV

330μF

Polymer

3x47μF +

3x330μF Polymer

2x47μF +

7x330μF

Polymer

Note: The capacitors used in the Tunable Loop tables are 47 F/2 m ESR ceramic and 330 F/12 m ESR polymer capacitors.

Recommended values of R

TUNE

and C

for different output

TUNE

capacitor combinations are given in Table 2. Table 2 shows the recommended values of R

TUNE

and C

for different

TUNE

values of ceramic output capacitors up to 1000uF that might be needed for an application to meet output ripple and noise requirements. Selecting R

TUNE

and C

according

TUNE

to Table 2 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

TUNE

and C

in order to meet 2% output

TUNE

voltage deviation limits for some common output voltages in the presence of a 6A to 12A step change (50% of full load), with an input voltage of 12V.

Please contact your GE technical representative to obtain more details of this feature as well as for 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.

Datasheet

2 × 12A Digital Dual MicroDlynxTM: Non-Isolated DC-DC Power Modules

4.5Vdc –14.4Vdc input; 0.51Vdc to 5.5Vdc output; 2 × 12AOutput Current

Digital Feature Descriptions

PMBus Interface Capability

The 2 × 12A Digital Dual 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).

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:

Data Byte High

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

Exponent

MSB

The value is of the number is then given by

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 SIG_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

MSB

Value = Mantissa x 2

Data Byte Low

Mantissa

Exponent

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

Table 4

Digit Resistor Value (K)

0 11 1 18.7 2 27.4 3 38.3 4 53.6 5 82.5 6 127 7 187

The user must know which I

C 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.

DDR1

DDR0

SIG_GND

ADDR0

ADDR1

Figure 48. Circuit showing connection of resistors used to set the PMBus address of the module.

PAGE

Both the outputs of the module can be configured, controlled and monitored through only one physical address

Format

Bit Position

Access

Function

Default

Value

7 6 5 4 3 2 1 0

r/w r r r

PA X X X X X X P0

0 X X X X X X 0

Unsigned Binary

r r r r/w

PAGE Command Truth Table

PA P0 Logic Results

0 0

0 1

1 0

1 1

If PAGE=11, then any read commands affect the first channel. Any value to ready-only registers is ignored.

All Commands address first output

All Commands address second output

Illegal input, Ignore write

All Commands address both outputs

Datasheet

2 × 12A Digital Dual MicroDlynxTM: Non-Isolated DC-DC Power Modules

4.5Vdc –14.4Vdc input; 0.51Vdc to 5.5Vdc output; 2 × 12A Output Current

Operation (01h)

This is a paged register. The OPERATION command can be use to turn the module on or off in conjunction with the ON/OFF pin input. It is also used to margin up or margin down the output voltage

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:

Bit Position 4 3 2 1 0

Access r/w r/w r/w r r

Function PU CMD CPR POL CPA

Default Value 1 0 1 1 0

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.

Bit Value Action

Module powers up any time power is

present regardless of state of the analog ON/OFF pin 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.

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

Bit Value Action

Module ignores the ON bit in the

OPERATION command Module responds to the ON bit in 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.

Bit Value Action

Module ignores the analog ON/OFF pin, i.e.

ON/OFF is only controlled through the PMBUS via the OPERATION command Module requires the analog ON/OFF pin to

be asserted to start the unit

CPA: Sets the action of the analog ON/OFF pin when turning the controller OFF. This bit is internally read and cannot be modified by the user

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 600s 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.

Datasheet

2 × 12A Digital Dual MicroDlynxTM: Non-Isolated DC-DC Power Modules

4.5Vdc –14.4Vdc input; 0.51Vdc to 5.5Vdc output; 2 × 12AOutput Current

Table 5

Rise Time Exponent Mantissa

600s 11100 00000001010 900s 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

Output Voltage Adjustment Using the PMBus

The VREF_TRIM parameter is important for a number of PMBus commands related to output voltage trimming, and margining. Each of the 2 output voltages of the module shall be set as the combination of the voltage divider formed by RTrim and a 20k upper divider resistor inside the module, and the internal reference voltage of the module. The reference voltage V the output regulation voltage is then given by

V ×

Hence the module output voltages shall be dependent on the value of RTrim1 and Rtrim2 which are connected external to the module.

The VREF_TRIM parameter is used to apply a fixed offset voltage to the reference voltage shall be specified using the “Linear” format and two bytes. The exponent is fixed at –9 (decimal). The resolution of the adjustment is 7 bits, with a resulting step size of approximately 0.4%. The maximum trim range is -20% to +10% of the nominal reference voltage(600mV) in 2mV steps. Permissible values range from

-120mV to +60mV

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 shall be adjustable with a minimum step size of 0.4% over a +10% to

-20% range from nominal using the VREF_TRIM command over the PMBus.

The VREF_TRIM command shall be used to apply a fixed offset voltage to either of the output voltage command value using the “Linear” mode with the exponent fixed at –9 (decimal). The value of the offset voltage shall be given by

shall be nominally set at 600mV, and

REF

)(

RTrim

is what is changed inside

REF



 



 

offsetREF

RTrim

120000

220000



REFOUT

 

 



×= TRIMVREFV

REFOUT

−

This offset voltage shall be added to the voltage set through the divider ratio and nominal V output voltage. If a value outside of the +10%/-20% adjustment range is given with this command, the module shall set it’s output voltage to the upper or lower limit value (as if VOUT_TRIM, assert SMBALRT#, set the CML bit in STATUS_BYTE and the invalid data bit in STATUS_CML.

to produce the trimmed

REF

Output Voltage Margining Using the PMBus

Each output of the module shall also have its output voltage margined via PMBus commands. The command STEP_VREF_MARGIN_HIGH shall set the margin high voltage, while the command STEP_VREF_MARGIN_LOW sets the margin low voltage. Both the STEP_VREF_MARGIN_HIGH and STEP_VREF_MARGIN_LOW commands shall use the “Linear” mode with the exponent fixed at –9 (decimal). Two bytes shall be used for the mantissa with the upper bit [7] of the high byte shall be fixed at 0. The actual margined output voltage shall be a combination of the STEP_VREF_MARGIN_HIGH or STEP_VREF_MARGIN_LOW and the VREF_TRIM values as shown below.

MHREF

)(

TRIMVREFHIGHMARGINVREFSTEP

MLREF

)(

TRIMVREFLOWMARGINVREFSTEP

The net permissible voltage range change shall be -30% to +10% for the margin high command and -20% to 0% for the margin low command

The module shall support the margined high or low voltages using the OPERATION command. Bits [5:2] shall be used to enable margining as follows:

00XX : Margin Off 0101 : Margin Low (Act on Fault) 0110 : Margin Low (Act on Fault) 1001 : Margin High (Act on 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 five bits of the mantissa are fixed at 0 while the lower six bits are programmable with a default value of 19A (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.

Temperature Status via PMBus

The module will provide information related to temperature of the module through the READ_TEMPERATURE_2 command. The command returns external temperature in degrees Celsius. This command shall use the “Linear” data

−

2)____(

×+

−

2)____(

×+

Datasheet

2 × 12A Digital Dual MicroDlynxTM: Non-Isolated DC-DC Power Modules

4.5Vdc –14.4Vdc input; 0.51Vdc to 5.5Vdc output; 2 × 12A Output Current

format with a two byte data word where the upper five bits [7:3] of the high byte shall represent the exponent and the remaining three bits of the high byte [2:0] and the eight bits in the low byte shall represent the mantissa. The exponent is fixed at 0 (decimal). The lower 11 bits are the result of the ADC conversion of the external temperature

PMBus Adjustable Output Over, Under Voltage Protection and Power Good

The module has a common command to set the PGOOD, VOUT_UNDER_VOLTAGE(UV) and VOUT_OVER_VOLTAGE (OV) limits as a percentage of nominal. Refer to Table 6 of the next section for the available settings. The PMBus command VOUT_OVER_VOLTAGE (OV) shall be used to set the output over voltage threshold from two possible values: +12.5% or +16.67% of the commanded output voltage for each output.

The module provides a Power Good (PGOOD) for each output signal that shall be implemented with an open-drain output to indicate that the output voltage is within the regulation limits of the power module. The PGOOD signal shall be deasserted 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 shall be user selectable via the PMBus (the default values are as shown in the Feature Specifications Section). Each threshold shall be set up symmetrically above and below the nominal value. The PGL (POWERGOODLOW) command shall set the output voltage level above which PGOOD is asserted (lower threshold). The PGH(POWERGOODHIGH) command shall set the level above which the PGOOD command is de-asserted. This command shall also set two thresholds symmetrically placed around the nominal output voltage. Normally, the PGL threshold shall be set higher than the PGH threshold.

The PGOOD terminal can be connected through a pullup resistor (suggested value 100KΩ) to a source of 5VDC or lower. The current through the PGood terminal should be limited to a max value of 5mA

PMBus Adjustable Input Undervoltage Lockout

The module allows for adjustment of the input under voltage lockout and hysteresis. The command VIN_ON allows setting the input voltage turn on threshold for each output, while the VIN_OFF command shall set the input voltage turn off threshold. For the VIN_ON command, possible values are

4.25V to 16V in variable steps. For the VIN_OFF command, possible values are 4V to 15.75V in 0.5V steps. If other values are entered for either command, they shall 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 shall represent the exponent (fixed at -2) and the remaining 11 bits shall represent the mantissa. For the mantissa, the four most significant bits are fixed at 0.

Measurement of Output Current, Output Voltage and Input Voltage

The module is capable of measuring key module parameters such as output current and voltage for each

outputs and input voltage for each input and providing this information through 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 11 at 0 since only positive numbers are considered valid.

bit fixed

Measuring Output Voltage Using the PMBus

The module provides output voltage information using the READ_VOUT command for each output. In this module the output voltage is sensed at the remote sense amplifier output pin so voltage drop to the load is not accounted for. The command shall return two bytes of data all representing the mantissa while the exponent is fixed at -9 (decimal).

Reading the Status of the Module using the PMBus

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.

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

Bit

Position

7 X 0 6 OFF 0 5 VOUT Overvoltage 0 4 IOUT Overcurrent 0

Flag

Default

Value

Datasheet

2 × 12A Digital Dual MicroDlynxTM: Non-Isolated DC-DC Power Modules

4.5Vdc –14.4Vdc input; 0.51Vdc to 5.5Vdc output; 2 × 12AOutput Current

3 VIN Undervoltage 0 2 Temperature 0 1 CML (Comm. Memory Fault) 0 0 None of the above 0

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

Bit

Position

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

Low Byte

Flag

Default

Value

High Byte

Bit

Position

7 VOUT fault or warning 0 6 IOUT fault or warning 0 5 X 0 4 MFR 0 3 POWER_GOOD# (is negated) 0 2 X 0 1 X 0 0 X 0

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

Bit

Position

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

Bit

Position

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

Flag

Default

Value

Default

Value

Default

Value

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

Bit

Position

7 OT Fault 0 6 OT Warning 0 5 X 0 4 X 0 3 X 0 2 X 0 1X 0 0 X 0

Flag

Default

Value

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

Bit

Position

7 Invalid/Unsupported Command 0 6 Invalid/Unsupported Command 0 5 Packet Error Check Failed 0 4 Memory Fault Detected 0 3 X 0 2 X 0 1 Other Communication Fault 0 0 X 0

Flag

Default

Value

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 and revision number. Bits [7:2] in the Low Byte indicate the module type (xxxxxx corresponds to the UDXS1212 series of module), while bits [7:3] indicate the revision number of the module.

Bit

Position

7:2 Module Name 000011 1:0 Reserved 10

Low Byte

Flag

Default

Value

High Byte

Bit

Position

7:3 Module Revision Number None 2:0 Reserved 000

Flag

Default

Value

Datasheet

2 × 12A Digital Dual MicroDlynxTM: Non-Isolated DC-DC Power Modules

4.5Vdc –14.4Vdc input; 0.51Vdc to 5.5Vdc output; 2 × 12A Output Current

Summary of Supported PMBus Commands

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

Table 6

Hex

Code

00 PAGE

01 OPERATION

02 ON_OFF_CONFIG

03 CLEAR_FAULTS

10 WRITE_PROTECT

Command Brief Description

Ability to configure, control and monitor each output by using only one physical address of the module

Format

Bit Position

Access

Function

Default Value

PAGE Command Truth Table

PA P0 Logic Results

0 0

0 1

1 0

1 1

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

Format

Bit Position

Access

Function

Default Value

Bit 7: 0 Output switching disabled

1 Output switching enabled Margin: 00XX Margin Off 0101 Margin Low ( Act on fault) 0110 Margin Low (Act on fault) 1001 Margin High (Act on fault) 1010 Margin High (Act on fault) Configures the ON/OFF functionality as a combination of analog ON/OFF pin and PMBus commands

Format

Bit Position

Access

Function

Default Value

Refer to Page 19 for details on pu, cmd, cpr, pol and cpa Clear any fault bits that may have been set, also releases the SMBALERT# signal

if the device has been asserting it.

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

Bit Position

Access

Function

Default Value

Bit5: 0 – Enables all writes as permitted in bit6 or bit7 1 – Disables all writes except the WRITE_PROTECT, PAGE 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, PAGE 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)

7 6 5 4 3 2 1 0

r/w r r r r r r r/w

PA X X X X X X P0

0 X X X X X X 0

All Commands address first output

All Commands address second output

All Commands address both outputs

7 6 5 4 3 2 1 0

r/w r r/w r/w r/w r/w r r

On X Margin X X

0 0 0 0 0 0 X X

7 6 5 4 3 2 1 0

r r r r/w r/w r/w r/w r X X X pu cmd cpr pol cpa 0 0 0 1 0 1 1 0

7 6 5 4 3 2 1 0

r/w r/w r/w x x x x x

bit7 bit6 bit5 X X X X X

0 0 0 X X X X X

Unsigned Binary

Illegal input, Ignore write

Unsigned Binary

Non-Volatile

Memory Storage

YES

15 STORE_USER_ALL

Stores all of the current storable register settings in the EEPROM memory as the new defaults on power up

Datasheet

2 × 12A Digital Dual MicroDlynxTM: Non-Isolated DC-DC Power Modules

4.5Vdc –14.4Vdc input; 0.51Vdc to 5.5Vdc output; 2 × 12AOutput Current

Hex

Code

16 RESTORE_USER_ALL

19 CAPABILITY

20 VOUT_MODE

35 VIN_ON

36 VIN_OFF

Command Brief Description

Restores all of the storable register settings from the non-volatile memory (EEPROM). The command should not be used while the device is actively switching

This command helps the host system/GUI/CLI determine key capabilities of the module

Format

Bit Position

Access

Function

Default Value

PEC – 1 Supported SPD -01 – max of 400kHZ ALRT – 1 – SMBALERT# supported The module has MODE set to Linear and Exponent set to -10. These values cannot be changed

Bit Position

Access

Function

Default Value

Mode: Value fixed at 000, linear mode Exponent: Value fixed at 10111, Exponent for linear mode values is -9 Sets the value of input voltage at which the module turns on

Format

Bit Position

Access

Function

Default Value

Bit Position

Access

Function

Default Value

Exponent -2 (dec), fixed Mantissa The upper four bits are fixed at 0 The lower seven are programmable with a default value of 9(dec). This corresponds to a default of 4.25V. Allowable values are

• 4.25, in steps of 0.25V upto 9.5V.

• 9.5V to 13V in increments of 0.5V

• 13V to 16V in increments of 1V

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

Format

Bit Position

Access

Function

Default Value

Bit Position

Access

Function

Default Value

Exponent -2 (dec), fixed Mantissa The upper four bits are fixed at 0 The lower seven are programmable with a default value of 8(dec). This corresponds to a default of 4.0V. Allowable values are

• 4.00, in steps of 0.25V upto 9.75V.

• 10.25V to 11.75V in increments of 0.5V

• 12V

• 13.75V to 16.75V in increments of 1V

7 6 5 4 3 2 1 0

r r r r r r r r

PEC SPD ALRT Reserved

1 0 1 1 0 0 0 0

7 6 5 4 3 2 1 0

r r r r r r r r

Mode Exponent

0 0 0 1 0 1 1 1

7 6 5 4 3 2 1 0

r r r r r r r r

1 1 1 1 0 0 0 0

7 6 5 4 3 2 1 0

r r/w r/w r/w r/w r/w r/w r/w

0 0 0 1 0 0 0 1

7 6 5 4 3 2 1 0

r r r r r r r r

1 1 1 1 0 0 0 0

7 6 5 4 3 2 1 0

r r/w r/w r/w r/w r/w r/w r/w

0 0 0 0 1 0 0 0

Unsigned Binary

Linear, two’s complement binary

Exponent Mantissa

Mantissa

Linear, two’s complement binary

Exponent Mantissa

Mantissa

Non-Volatile

Memory Storage

YES

Datasheet

2 × 12A Digital Dual MicroDlynxTM: Non-Isolated DC-DC Power Modules

4.5Vdc –14.4Vdc input; 0.51Vdc to 5.5Vdc output; 2 × 12A Output Current

Hex

Code

Command Brief Description

38 IOUT_CAL_GAIN

39 IOUT_CAL_OFFSET

IOUT_OC_FAULT_LIMIT

Value maybe locked

47 IOUT_OC_FAULT_RESPONSE

IOUT_OC_WARN_LIMIT

Value may be locked

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

Format

Bit Position

Access

Function

Default Value

Bit Position

Access

Function

Default Value

7 6 5 4 3 2 1 0

r r r r r r r r/w

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

r/w r/w r/w r/w r/w r/w r/w r/w

Linear, two’s complement binary

Exponent Mantissa

Mantissa

V: Variable based on factory calibration

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

Format

Bit Position

Access

Function

Default Value

Bit Position

Access

Function

Default Value

7 6 5 4 3 2 1 0

r r r r r r/w r r

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

r r r/w r/w r/w r/w r/w r/w

Linear, two’s complement binary

Exponent Mantissa

Mantissa

V: Variable based on factory calibration

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

Format

Bit Position

Access

Function

Default Value

Bit Position

Access

Function

Default Value

7 6 5 4 3 2 1 0

r r r r r r r r

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

r r/w r/w r/w r/w r/w r/w r/w

0 0 1 0 1 0 0 0

Linear, two’s complement binary

Exponent Mantissa

Mantissa

Determines module action in response to an IOU_OC_FAULT_LIMIT or a VOUT undervoltage (UV) fault

Format

Bit Position

Access

Function

Default Value

7 6 5 4 3 2 1 0

r r r/w r/w r/w r r r

X X

0 0 1 1 1 1 0 0

Unsigned Binary

[2]

[1]

x X X

[0]

RS[2:0] – Retry Setting 000 Unit does not attempt to restart 111 Unit goes through normal soft start continuously Any other value is not acceptable

Sets the output overcurrent warning level in A

Format

Bit Position

Access

Function

Default Value

Bit Position

Access

Function

Default Value

7 6 5 4 3 2 1 0

r r r r r r r r

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

r r/w r/w r/w r/w r/w r/w r/w

0 0 1 0 0 1 1 0

Linear, two’s complement binary

Exponent Mantissa

Mantissa

Non-Volatile

Memory Storage

YES

Datasheet

2 × 12A Digital Dual MicroDlynxTM: Non-Isolated DC-DC Power Modules

4.5Vdc –14.4Vdc input; 0.51Vdc to 5.5Vdc output; 2 × 12AOutput Current

Hex

Code

Command Brief Description

OT_FAULT_LIMIT

Value may be locked

OT_WARN_LIMIT

Value may be locked

61 TON_RISE

78 STATUS_BYTE

79 STATUS_WORD

7A STATUS_VOUT

Sets the overtemperature fault level in °C

Format

Bit Position

Access

Function

Default Value

Bit Position

Access

Function

Default Value

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

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

r/w r/w r/w r/w r/w r/w r/w r/w

1 0 0 0 0 1 1 1

Linear, two’s complement binary

Exponent Mantissa

Mantissa

Sets the over temperature warning level in °C

Format

Bit Position

Access

Function

Default Value

Bit Position

Access

Function

Default Value

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

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

r/w r/w r/w r/w r/w r/w r/w r/w

0 1 1 1 1 1 0 1

Linear, two’s complement binary

Exponent Mantissa

Mantissa

Sets the rise time of the output voltage during startup. Supported Values – 0.6, 0.9, 1.2, 1.8, 2.7, 4.2, 6.0, 9.0msec. Value of 0 instructs unit to bring its output to programmed value as quickly as possible

Format

Bit Position

Access

Function

Default Value

Bit Position

Access

Function

Default Value

7 6 5 4 3 2 1 0 r r r r r r r r/w

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

r/w r/w r/w r/w r/w r/w r/w r/w

0 0 1 0 1 0 1 1

Linear, two’s complement binary

Exponent Mantissa

Mantissa

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

Format

Bit Position

Access

Flag

Default Value

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

X OFF

0 0 0 0 0 0 0 0

Unsigned Binary

VOUT

IOUT_

_OV

VIN_U

TEMP CML

None

of the

Above

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

Format

Bit Position

Access

Default Value

Bit Position

Access

Default Value

Flag

7 6 5 4 3 2 1 0

r r r r r r r r

IOUT/P

VOUT

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

r r r r r r r r

X OFF

0 X 0 0 0 0 0 0

Unsigned Binary

X MFR PGOOD X X X

VOUT_

IOUT_

VIN_U

TEMP CML

None of the

above

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

Format

Bit Position

Access

Flag

Default Value

7 6 5 4 3 2 1 0

r r r r r r r r

VOUT_OV X X VOUT_UV X X X X

0 0 0 0 0 0 0 0

Unsigned Binary

Non-Volatile

Memory Storage

YES

Datasheet

2 × 12A Digital Dual MicroDlynxTM: Non-Isolated DC-DC Power Modules

4.5Vdc –14.4Vdc input; 0.51Vdc to 5.5Vdc output; 2 × 12A Output Current

Hex

Code

7B STATUS_IOUT

7D STATUS_TEMPERATURE

7E STATUS_CML

80 STATUS_MFR_SPECIFIC

8B READ_VOUT

8C READ_IOUT

Command Brief Description

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

Format

Bit Position

Access

Flag

Default Value

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

Format

Bit Position

Access

Flag

Default Value

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

Format

Bit Position

Access

Flag

Default Value

Returns one byte of information with the status of the module specific faults or warning

Format

Bit Position

Access

Flag

Default Value

OTFI – Internal Temperature above Thermal Shutdown threshold IVADDR – PMBUs address is not valid TWOPH_EN – Module is in 2 phase mode

Returns the value of the output voltage of the module. Exponent is fixed at -9.

Format

Bit Position

Access

Function

Default Value

Bit Position

Access

Function

Default Value

Returns the value of the output current of the module

Format

Bit Position

Access

Function

Default Value

Bit Position

Access

Function

Default Value

V - Variable

7 6 5 4 3 2 1 0

r r r r r

IOUT_OC Fault X IOUT OC Warning X X X X X

0 0 0 0 0 0 0 0

7 6 5 4 3 2 1 0

r r r r r r r r

OT_FAULT OT_WARN X X X X X X

0 0 0 0 0 0 0 0

7 6 5 4 3 2 1 0

r r r r r r r r

Invalid

Command

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

OTFI x X IVADDR X X X TWOPH_EN

0 0 0 0 0 0 0 0

Invalid

Data

0 0 0 0 0 0 0 0

Linear, two’s complement binary

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

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

0 0 0 0 0 0 0 0

Linear, two’s complement binary

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

Exponent Mantissa 1 1 1 0 0 V V V 7 6 5 4 3 2 1 0 r r r r r r r r

V V V V V V V 0

Unsigned Binary

Memory

PEC

fault

Fail

detected

Unsigned Binary

Mantissa

X X

r r r

Other

Comm

Fault

Non-Volatile

Memory Storage

Datasheet

2 × 12A Digital Dual MicroDlynxTM: Non-Isolated DC-DC Power Modules

4.5Vdc –14.4Vdc input; 0.51Vdc to 5.5Vdc output; 2 × 12AOutput Current

Table 6 (Continued)

Hex

Code

8E READ_TEMPERATURE_2

98 PMBUS_REVISION

D0 MFR_SPECIFIC_00

D4 VREF_TRIM

D5 STEP_VREF_MARGIN_HIGH

Command Brief Description

Returns the value of the external temperature in degree Celsius

Format

Bit Position

Access

Function

Default Value

Bit Position

Access

Function

Default Value

V - Variable

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

Format

Bit Position

Access

Default Value

Returns module name information

Format

Bit Position

Access

Function

Default Value

Bit Position

Access

Function

Default Value

Applies a fixed offset to the reference voltage. Max trim range is -20% to +10% in 2mV steps. Permissible values range between -120mV and +60mV. The offset is calculated as VREF_TRIMx2

Format

Bit Position

Access

Function

Default Value

Bit Position

Access

Function

Default Value

Applies a fixed offset to the reference voltage. Adjustment is 0% to +10% in 2mV steps. Permissible values range between 0mV and +60mV. The offset is calculated as (STEP_VREF_MARGIN_HIGH + VREF_TRIM)x2 voltage includes VREF_TRIM adjustment and ranges from -30% to 10%

Format

Bit Position

Access

Function

Default Value

Bit Position

Access

Function

Default Value

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

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

V V V V V V V 0

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

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

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

0 0 0 0 1 1 1 0

-9

. Exponent fixed at -9(dec)

7 6 5 4 3 2 1 0

r/w r r r r r r r

V V V V V V V V 7 6 5 4 3 2 1 0 r r r/w r/w r/w r/w r/w r/w

V V V V V V V V

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

V V V V V V V V 7 6 5 4 3 2 1 0 r r r r/w r/w r/w r/w r/w

V V V V V V V V

Linear, two’s complement binary

Exponent Mantissa

Mantissa

Unsigned Binary

Reserved

Module Name Reserved

Linear, two’s complement binary

Mantissa

-9

. Exponent fixed at -9(dec). Net output

Linear, two’s complement binary

Mantissa

Non-Volatile

Memory Storage

YES

Datasheet

2 × 12A Digital Dual MicroDlynxTM: Non-Isolated DC-DC Power Modules

4.5Vdc –14.4Vdc input; 0.51Vdc to 5.5Vdc output; 2 × 12A Output Current

Table 6 (Continued)

Hex

Code

D6 STEP_VREF_MARGIN_LOW

D7 PCT_VOUT_FAULT_PG_LIMIT

D8 SEQUENCE_TON_TOFF_DELAY

Command Brief Description

Applies a fixed negative offset to the reference voltage. Adjustment is -20% to 0% in 2mV steps. Permissible values range between -120mV and 0mV) The offset is calculated as (STEP_VREF_MARGIN_HIGH + VREF_TRIM)x2 Net output voltage includes VREF_TRIM adjustment and ranges from -30% to 10%

Format

Bit Position

Access

Function

Default Value

Bit Position

Access

Function

Default Value

Single command to set PGOOD, VOUT_UNDER_VOLTAGE(UV) and VOUT_OVER_VOLTAGE(OV) limits as percentage of nominal

Format

Bit Position

Access

Function

Default Value

PAGE Command Truth Table

PCT_M

Used to set delay to turn-on or turn-off modules as a ratio of TON_RISE. Values can range from 1 to 7

Default Value

PCT_L

0 0 -16.67 -12.5 -8.33 12.5 8.33 16.67

0 1 -12.5 -8.33 -4.17 8.33 4.17 12.5

1 0 -29.17 -20.83 -16.67 8.33 4.17 12.5

1 1 -41.67 -37.5 -33.33 8.33 4.17 12.5

Format

Bit Position

Access

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

V V V V V V V V 7 6 5 4 3 2 1 0 r r r/w r/w r/w r/w r/w r/w

V V V V V V V V

UV (%) PGL

7 6 5 4 3 2 1 0

r/w r/w r/w r r/w r/w r/w r

0 0 0 0 0 0 0 0

Linear, two’s complement binary

Mantissa

Unsigned Binary

7 6 5 4 3 2 1 0

r r r

X X X X X X

0 X X X X X X 0

r r r r/w r/w

LOW

(%)

PGL

HIGH

(%)

Unsigned Binary

-9

.Exponent fixed at -9(dec).

PCT_

MSB

PGH

HIGH

(%)

PGH

LOW

(%)

OV (%)

Non-Volatile

Memory Storage

YES

PCT_

LSB

Air

Datasheet

2 × 12A Digital Dual MicroDlynxTM: Non-Isolated DC-DC Power Modules

4.5Vdc –14.4Vdc input; 0.51Vdc to 5.5Vdc output; 2 × 12AOutput Current

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

49. The preferred airflow direction for the module is in Figure 50.

25.4_

Wind Tunnel

PWBs

(1.0)

Power Module

The thermal reference points, T are also shown in Figure 50. For reliable operation the temperatures at these points should not exceed 135 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.

used in the specifications

ref

C. The

Figure 50. Preferred airflow direction and location of hotspot of the module (Tref).

12.7_

(0.50)

76.2_

(3.0)

Probe Location for measuring airflow and ambient temperature

flow

Figure 49. Thermal Test Setup.

Datasheet

2 × 12A Digital Dual MicroDlynxTM: Non-Isolated DC-DC Power Modules

4.5Vdc –14.4Vdc input; 0.51Vdc to 5.5Vdc output; 2 × 12A Output Current

Example Application Circuit

Requirements: Vin: 12V Vout: 1.8V Iout: 2 × 9A max., worst case load transient is from 6A to 9A

ΔVout: 1.5% of Vout (27mV) for worst case load transient Vin, ripple 1.5% of Vin (180mV, p-p)

CI3

Vin+

CI2

CI1

VIN1

PGOOD1

MODULE

SYNC

CLK

DATA SMBALRT#

ON/OFF1

VOUT1

VS+1

TRIM1

DDR0

DDR1

SIG_GND

RADDR1

RTUNE1

CTUNE2

RTrim1

RADDR0

Vout+

CO1

CO2

CO3

PGND

TRIM2

VS+2

VOUT2

RTrim2

RTUNE2

CTUNE2

CO4

CO5

CO6

GND

PGND

ON/OFF2

PGOOD2

VIN2

CI1 Decoupling cap - 4x0.1μF/16V, 0402 size ceramic capacitor CI2 4x22μF/16V ceramic capacitor (e.g. Murata GRM32ER61C226KE20) CI3 470μF/16V bulk electrolytic CO1 Decoupling cap - 2x0.1μF/16V, 0402 size ceramic capacitor CO2 3 x 47μF/6.3V ceramic capacitor (e.g. Murata GRM31CR60J476ME19) CO3 1 x 330μF/6.3V Polymer (e.g. Sanyo Poscap) CO4 Decoupling cap - 2x0.1μF/16V, 0402 size ceramic capacitor CO5 3 x 47μF/6.3V ceramic capacitor (e.g. Murata GRM31CR60J476ME19) CO6 1 x 330μF/6.3V Polymer (e.g. Sanyo Poscap) CTune1 1200pF ceramic capacitor (can be 1206, 0805 or 0603 size) RTune1 300 ohms SMT resistor (can be 1206, 0805 or 0603 size) RTrim1 10kΩ SMT resistor (can be 1206, 0805 or 0603 size, recommended tolerance of 0.1%) CTune2 1200pF ceramic capacitor (can be 1206, 0805 or 0603 size) RTune2 300 ohms SMT resistor (can be 1206, 0805 or 0603 size) RTrim2 10kΩ 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.

Datasheet

2 × 12A Digital Dual MicroDlynxTM: Non-Isolated DC-DC Power Modules

4.5Vdc –14.4Vdc input; 0.51Vdc to 5.5Vdc output; 2 × 12AOutput Current

Mechanical Outline

Dimensions are in millimeters and (inches). Tolerances: x.x mm x.xx mm

0.5 mm (x.xx in. ± 0.02 in.) [unless otherwise indicated]

0.25 mm (x.xxx in ± 0.010 in.)

15 14

22 23 2425

PIN FUNCTION PIN FUNCTION

1 VSNS1 15 ADDR1 2 VOUT1 16 TRIM1 3 PGND 17 Sig_GND 4 VOUT2 18 TRIM2 5 VSNS2 19 SYNC 6 SMBALERT# 20 PGND 7 DATA 21 PGND 8 CLK 22 PGND

9 ENABLE1 23 PGND 10 ENABLE2 24 PGND 11 VIN 25 PGND 12 PGND 26 PGND 13 VIN 27 PGOOD2 14 ADDRO 28 PGOOD1

Datasheet

2 × 12A Digital Dual MicroDlynxTM: Non-Isolated DC-DC Power Modules

4.5Vdc –14.4Vdc input; 0.51Vdc to 5.5Vdc output; 2 × 12A Output Current

Recommended Pad Layout

Dimensions are in millimeters and (inches). Tolerances: x.x mm x.xx mm

0.5 mm (x.xx in. ± 0.02 in.) [unless otherwise indicated]

0.25 mm (x.xxx in ± 0.010 in.)

PIN FUNCTION PIN FUNCTION

1 VSNS1 15 ADDR1 2 VOUT1 16 TRIM1 3 PGND 17 Sig_GND 4 VOUT2 18 TRIM2 5 VSNS2 19 SYNC 6 SMBALERT# 20 PGND 7 DATA 21 PGND 8 CLK 22 PGND

9 ENABLE1 23 PGND 10 ENABLE2 24 PGND 11 VIN 25 PGND 12 PGND 26 PGND 13 VIN 27 PGOOD2 14 ADDRO 28 PGOOD1

Datasheet

2 × 12A Digital Dual MicroDlynxTM: Non-Isolated DC-DC Power Modules

4.5Vdc –14.4Vdc input; 0.51Vdc to 5.5Vdc output; 2 × 12AOutput Current

Packaging Details

The 12V Digital Dual MicroDlynxTM2 × 12A 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”)

Datasheet

2 × 12A Digital Dual MicroDlynxTM: Non-Isolated DC-DC Power Modules

4.5Vdc –14.4Vdc input; 0.51Vdc to 5.5Vdc output; 2 × 12A Output Current

Surface Mount Information

Pick and Place

The2 × 12A Digital Dual 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 300 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.

Pb-free Reflow Profile

Power Systems will comply with J-STD-020 Rev. D (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). 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

The2 x 12A Digital Dual MicroDlynxTM modules have a MSL rating of 3

C. The label

packages should not be broken until time of use. Once the original package is broken, the floor life of the product at conditions of 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 51. Recommended linear reflow profile using Sn/Ag/Cu solder.

≤

30°C and 60% relative humidity varies

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).

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 Devices). Moisture barrier bags (MBB) with desiccant are required for MSL ratings of 2 or greater. These sealed

Datasheet

2 × 12A Digital Dual MicroDlynxTM: Non-Isolated DC-DC Power Modules

4.5Vdc –14.4Vdc input; 0.51Vdc to 5.5Vdc output; 2 × 12AOutput Current

Ordering Information

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

Table 9. Device Codes

Device Code

Input

Voltage Range

UDXS1212A0X3-SRZ 4.5 – 14.4Vdc 0.51 – 5.5 Vdc 12Ax2 Negative No 150026732

Table 10. Coding Scheme

Package

Identifier

Family Sequencing

Option

Input

Voltage

U D X S 1212A0 X 3 -SR Z

P=Pico

U=Micro

M=Mega

D=Dlynx

Digital

V = DLynx

Analog.

T=with EZ Sequence

X=without

sequencing

Special:

4.5 – 14V

G=Giga

GE Digital Non-Isolated DC-DC products use technology lic ensed 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,

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

US7373527, US7394445, US7456617, US7459892, US7493504, US7526660.

Output

Voltage

Output

current

Output

voltage

2 × 12A X =

programm able output

Output

Current

On/Off

logic

4 = positive

No entry = negative

On/Off

Logic

Sequencing Comcodes

Remote

Sense Options

3 =

Remote

Sense

S = Surface

Mount

R = Tape &

Reel

ROHS Compliance

Z = ROHS6

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.gecriticalpower.com

GE Industrial Solutions 12A Digital Dual Output MicroDLynx User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual