GE Industrial Solutions 12A Digital SlimLynx User Manual

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Page 1

A A

Preliminary Data Sheet

12A Digital SlimLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 12A Output Current

RoHS Compliant

Applications

 Distributed power architectures

 Intermediate bus voltage applications

 Telecommunications equipment

 Servers and storage applications

 Networking equipment

 Industrial equipment

Vout+Vin+

GND

SIG_GND

GND

VOUT

VS+

TRIM

DDR0 DDR1

VS-

RADDR1

RTUNE

CTUNE

RTrim

RADDR0

VIN

PGOOD

MODULE

SEQ

CLK

Cin

DAT SMBALRT#

ON/OFF

SYNC

Description

The 12A Digital SlimLynxTM power modules are non-isolated dc-dc converters that can deliver up to 12A of output current. These modules operate over a wide range of input voltage (V

0.45Vdc 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 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)

= 3Vdc-14.4Vdc) and provide a precisely regulated output voltage from

Features

 Ulltra low height design for very dense power

applications.

 High technology encapsulation for improved thermal

performance, electrical insulation, and easy manufacturing.

 Small size: 20.32 mm x 11.43 mm x 3 mm (Max)

(0.8 in x 0.45 in x 0.118 in)

 Output voltage programmable from 0.6Vdc to 5.5Vdc

via external resistor. Digitally adjustable down to

0.45Vdc

 Wide Input voltage range (3Vdc-14.4Vdc)

 Wide operating temperature range [-40°C to 105°C]. See

derating curves

 DOSA approved footprint

TM #

 Digital interface through the PMBus

 Tunable Loop

to optimize dynamic output voltage

protocol

response

 Flexible output voltage sequencing EZ-SEQUENCE

 Power Good signal

 Remote On/Off

 Fixed switching frequency with capability of external

synchronization

 Output overcurrent protection (non-latching)

 Overtemperature protection

 Ability to sink and source current

 Compatible in a Pb-free or SnPb reflow environment

†

 UL* 60950-1Recognized, CSA

Certified, and VDE

‡

0805:2001-12 (EN60950-1) Licensed

C22.2 No. 60950-1-03

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

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

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

Class II

 ISO** 9001 and ISO 14001 certified manufacturing

facilities

feature that allows the

Page 2

Preliminary Data Sheet

12A Digital SlimLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 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

SEQ, SYNC, VS+ All 7 V

CLK, DATA, SMBALERT# All 3.6 V

Operating Ambient Temperature All T

(see Thermal Considerations section)

Storage Temperature All T

stg

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 VIN 3

Maximum Input Current All I

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

Input No Load Current

= 12Vdc, IO = 0, module enabled)

Input Stand-by Current

= 12Vdc, module disabled)

)

O, max

= 0.6 Vdc I

O,set

= 5Vdc I

O,set

All I

Inrush Transient All I2t 1 A2s

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

= I

14V

; See Test Configurations)

, IO

Omax

=0 to

All 50 mAp-p

Input Ripple Rejection (120Hz) All -55 dB

IN,max

IN,No load

220 mA

IN,No load

20 mA

IN,stand-by

-0.3 15 V

-40 85 °C

-55 125 °C

⎯

14.4 Vdc

10A Adc

50 mA

Page 3

Preliminary Data Sheet

12A Digital SlimLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 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 V

O, set

Adjustment Range (selected by an external resistor) (Some output voltages may not be possible depending on the

All V

input voltage – see Feature Descriptions Section)

PMBus Adjustable Output Voltage Range All VO,adj -25 0 +25 %V

PMBus Output Voltage Adjustment Step Size All 0.4 %V

Remote Sense Range All 0.5 Vdc

Output Regulation (for VO  2.5Vdc)

Line (VIN=V

Load (IO=I

IN, min

O, min

to V

) All

IN, max

to I

) All

O, max

Output Regulation (for VO < 2.5Vdc)

Line (VIN=V

Load (IO=I

Temperature (T

IN, min

O, min

to V

) All

IN, max

to I

) All

O, max

to T

ref=TA, min

) All

A, max

Output Ripple and Noise on nominal output

(VIN=V ceramic ca

IN, nom

and IO=I

acitors)

O, min

to I

Co = 3x47nF // 2x47 F

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  72 %

O,set

= 1.2Vdc  81 %

O, set

= 1.8Vdc  85 %

O,set

O, max

O, lim

O, s/c

-1.0 +1.0 % V

-3.0

⎯

+3.0 % V

0.6 5.5 Vdc

+0.4 % V

⎯

+0.4 % V

⎯

50 100 mV

⎯

5 mV

10 mV

0.4 % V

2x47

2x47 F

⎯

1000 F

⎯

10000 F

⎯

0 12 Adc

130 % I

1.5 Arms

O, set

O,set

O, set

pk-pk

rms

o,max

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.

= 2.5Vdc  87.5 %

O,set

= 3.3Vdc  89 %

O,set

= 5.0Vdc  92 %

O,set

800

⎯

kHz

Page 4

Preliminary Data Sheet

12A Digital SlimLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 12A Output Current

Electrical Specifications (continued)

Parameter Device Symbol Min Typ Max Unit

Frequency Synchronization All

Synchronization Frequency Range All 680 960 kHz

High-Level Input Voltage All V

Low-Level Input Voltage All V

Input Current, SYNC All I

Minimum Pulse Width, SYNC All t

Maximum SYNC rise time All t

SYNC

SYNC_SH

General Specifications

Parameter Device Min Typ Max Unit

Calculated MTBF (IO=0.8I Case 3

, TA=40°C) Telecordia Issue 2 Method 1

O, max

All 15,233,204 Hours

Weight

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

Logic High (Module ON)

Input High Current All IIH

Input High Voltage All VIH

Logic Low (Module OFF)

Input Low Current All IIL

Input Low Voltage All VIL

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

Logic Low (Module ON)

Input low Current All IIL — — 50 A

Input Low Voltage All VIL -0.2 — 0.6 Vdc

IN, min

to V

; open collector or equivalent,

IN, max

2 V

0.4 V

100 nA

100 ns

⎯

TBD

⎯

1 mA

IN,max

⎯ ⎯

-0.2

⎯

1 mA

0.6 V

g (oz.)

Vdc

IN, max

Page 5

Preliminary Data Sheet

12A Digital SlimLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 12A Output Current

Feature Specifications (cont.)

Parameter Device Symbol Min Typ Max Units

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

Over Temperature Protection (See Thermal Considerations section)

PMBus Over Temperature Warning Threshold * All T

Tracking Accuracy (Power-Up: 2V/ms) All VSEQ –Vo 100 mV

(Power-Down: 2V/ms) All VSEQ –Vo 100 mV

Input Undervoltage Lockout

IN, min

= V

IN, nom

IN, min

to V

, IO=I

o, set)

to V

IN, max

to within ±1% of steady state)

O, max , VO

= V

until Vo =

IN, min

o = 10% of Vo, set)

= I

to I

IN, max,IO

; I

O, min

to I

O, min

O, max

)

O, max

VSEQ < Vo)

Turn-on Threshold All

All Tdelay — 0.9 — msec

All Tdelay — 0.8 — msec

All Trise

All T

ref

WARN

— 2 — msec

% V

set

TBD °C

120 °C

2.475 3.025 Vdc

Turn-off Threshold All

Hysteresis All

PMBus Adjustable Input Under Voltage Lockout Thresholds All

Resolution of Adjustable Input Under Voltage Threshold All

PGOOD (Power Good)

Signal Interface Open Drain, V

supply

≤ 5VDC

Overvoltage threshold for PGOOD ON All

Overvoltage threshold for PGOOD OFF All

Undervoltage threshold for PGOOD ON All

Undervoltage threshold for PGOOD OFF All

Pulldown resistance of PGOOD pin All

Sink current capability into PGOOD pin All

2.25 2.75 Vdc

0.25 Vdc

2.5 14 Vdc

500 mV

108

110

set

5 mA

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

Page 6

Preliminary Data Sheet

12A Digital SlimLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 12A Output 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 3.6 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 A

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

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

Pin capacitance CO 0.7 pF

PMBus Operating frequency range Slave Mode FPMB 10 400 kHz

Data hold time

Data setup time

Measurement System Characteristics

Read delay time

Output current measurement range

Output current measurement resolution

Output current measurement gain accuracy at 25°C (with I

Output current measurement offset

OUT

VIN measurement range

VIN measurement resolution

VIN measurement accuracy

VIN measurement offset

)

OUT, CORR

measurement range

measurement resolution

measurement accuracy

measurement offset

=2mA VOL 0.4 V

OUT

=3.6V I

OUT

Receive Mode

Transmit Mode

tSU:DAT

tHD:DAT

tDLY 153 192 231 s

RNG

RES

ACC

OFST

OUT(rng)

OUT(res)

OUT(ACC)

OUT(ofst)

IN(rng)

IN(res)

IN(ACC)

IN(ofst)

0 10 A

300

250 ns

0 18 A

62.5 mA

±5 %

0.1 A

0 5.5 V

15.625 mV

-15 15 %

-3 3 %

3 14.4 V

32.5 mV

-15 15 %

-5.5 1.4 LSB

Page 7

OUTPUT

VOLTAGE

ON/OFF

VOLTAGE

Preliminary Data Sheet

12A Digital SlimLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 12A Output Current

Characteristic Curves

The following figures provide typical characteristics for the 12A Digital SlimLynxTM at 0.6Vo and 25oC.

EFFICIENCY, η (%)

Figure 1. Converter Efficiency versus Output Current.

Vin=3.3V

Vin=12V

024681012

OUTPUT CURRENT, I

Vin=14.4V

(A) AMBIENT TEMPERATURE, TA OC

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

OUTPUT CURRENT, Io (A)

(V) (50mV/div)

OUTPUT VOLTAGE

TIME, t (500ns/div)

Figure 3. Typical output ripple and noise (CO=2x47F

ceramic, V

(V) (5V/div)

ON/OFF

(V) (200mV/div) V

= 12V, Io = I

o,max,

(V) (5mV/div)

(A) (10Adiv) V

OUTPUT CURRENT, OUTPUT VOLTAGE

TIME, t (20μs /div)

Figure 4. Transient Response to Dynamic Load Change from 50% to 100% at 12Vin, Cout=1x47uF+11x330uF, CTune=47nF, RTune=180

(V) (5V/div)

(V) (200mV/div) V

Figure 5. Typical Start-up Using On/Off Voltage (Io = I

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

o,max

OUTPUT VOLTAGE INPUT VOLTAGE

Figure 6. Typical Star

o,max

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

Page 8

Preliminary Data Sheet

12A Digital SlimLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 12A Output Current

Characteristic Curves

The following figures provide typical characteristics for the 12A Digital SlimLynxTM at 1.2Vo and 25oC.

Vin=3.3V

EFFICIENCY, η (%)

024681012

Vin=12V

OUTPUT CURRENT, I

Figure 7. Converter Efficiency versus Output Current.

Vin=14.4V

OUTPUT CURRENT, Io (A)

(A) AMBIENT TEMPERATURE, TA OC

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

(V) (50mV/div)

OUTPUT VOLTAGE

TIME, t (500ns/div)

Figure 9. Typical output ripple and noise (CO=2x47F ceramic, V

= 12V, Io = I

(V) (5V/div)

ON/OFF

(V) (500mV/div) V

o,max,

(V) (10mV/div)

(A) (10Adiv) V

OUTPUT CURRENT OUTPUT VOLTAGE

TIME, t (20μs /div)

Figure 10. Transient Response to Dynamic Load Change from 50% to 100% at 12Vin, Cout = 3x47uF+3x330uF, CTune = 12nF & RTune = 220 ohms

(V) (5V/div)

(V) (500mV/div) V

OUTPUT VOLTAGE ON/OFF VOLTAGE

Figure 11. Typical Start-up Using On/Off Voltage (Io = I

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

o,max

OUTPUT VOLTAGE INPUT VOLTAGE

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

o,max

= 12V, Io=

Page 9

Preliminary Data Sheet

12A Digital SlimLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 12A Output Current

Characteristic Curves

The following figures provide typical characteristics for the 12A Digital SlimLynxTM at 1.8Vo and 25oC.

EFFICIENCY, η (%)

Figure 13. Converter Efficiency versus Output Current.

Vin=3.3V

Vin=12V

024681012

OUTPUT CURRENT, I

Vin=14.4V

(A) AMBIENT TEMPERATURE, TA OC

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

OUTPUT CURRENT, Io (A)

(V) (50mV/div)

OUTPUT VOLTAGE

TIME, t (500ns/div)

Figure 15. Typical output ripple and noise (CO=2x47F

ceramic, V

(V) (5V/div)

OFF VOLTAGE

ON/OFF

(V) (500mV/div) V

= 12V, Io = I

o,max,

(V) (20mV/div)

(A) (10Adiv) V

OUTPUT CURRENT, OUTPUT VOLTAGE

TIME, t (20μs /div)

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

(V) (5V/div)

(V) (500mV/div) V

OUTPUT VOLTAGE ON

Figure 17. Typical Start-up Using On/Off Voltage (Io = I

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

o,max

OUTPUT VOLTAGE INPUT VOLTAGE

Figure 18. Typical Start-up Using Input Voltage (V

o,max

= 12V, Io=

Page 10

OUTPUT

VOLTAGE

ON/OFF

VOLTAGE

Preliminary Data Sheet

12A Digital SlimLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 12A Output Current

Characteristic Curves

The following figures provide typical characteristics for the 12A Digital SlimLynxTM at 2.5Vo and 25oC.

EFFICIENCY, η (%)

Figure 19. Converter Efficiency versus Output Current.

Vin=4.5V

Vin=14V

Vin=12V

024681012

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

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

OUTPUT CURRENT, Io (A)

(V) (50mV/div)

OUTPUT VOLTAGE

TIME, t (500ns/div)

Figure 21. Typical output ripple and noise (CO=2x47F ceramic, V

= 12V, Io = I

(V) (5V/div)

ON/OFF

(V) (1V/div) V

o,max,

(V) (20mV/div)

(A) (10Adiv) V

OUTPUT CURRENT, OUTPUT VOLTAGE

TIME, t (20μs /div)

Figure 22. Transient Response to Dynamic Load Change from 50% to 100% at 12Vin, Cout = 2x47uF+1x330uF, CTune=3300pF & RTune=240

(V) (5V/div)

(V) (1V/div) V

Figure 23. Typical Start-up Using On/Off Voltage (Io = I

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

o,max

OUTPUT VOLTAGE INPUT VOLTAGE

Figure 24. Typical Start-up Using Input Voltage (V

o,max

= 12V, Io=

Page 11

Preliminary Data Sheet

12A Digital SlimLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 12A Output Current

Characteristic Curves

The following figures provide typical characteristics for the 12A Digital SlimLynxTM at 3.3Vo and 25oC.

100

Vin=4.5V

EFFICIENCY, η (%)

024681012

Vin=12V

OUTPUT CURRENT, I

Figure 25. Converter Efficiency versus Output Current.

Vin=14V

OUTPUT CURRENT, Io (A)

(A) AMBIENT TEMPERATURE, TA OC

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

(V) (50mV/div)

OUTPUT VOLTAGE

TIME, t (500ns/div)

Figure 27. Typical output ripple and noise (CO=2x47F

ceramic, V

(V) (5V/div)

OFF VOLTAGE

ON/OFF

(V) (1V/div) V

= 12V, Io = I

o,max,

(V) (50mV/div)

(A) (10Adiv) V

OUTPUT CURRENT, OUTPUT VOLTAGE

TIME, t (20μs /div)

Figure 28 Transient Response to Dynamic Load Change from 50% to 100% at 12Vin, Cout = 2x47uF+1x330uF, CTune=2700pF & RTune=300

(V) (5V/div)

(V) (1V/div) V

OUTPUT VOLTAGE ON

Figure 29. Typical Start-up Using On/Off Voltage (Io = I

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

o,max

OUTPUT VOLTAGE INPUT VOLTAGE

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

o,max

= 12V, Io=

Page 12

Preliminary Data Sheet

12A Digital SlimLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 12A Output Current

Characteristic Curves

The following figures provide typical characteristics for the 12A Digital SlimLynxTM at 5Vo and 25oC.

100

EFFICIENCY, η (%)

Figure 31. Converter Efficiency versus Output Current.

Vin=7V

Vin=12V

024681012

OUTPUT CURRENT, I

Vin=14V

(A) AMBIENT TEMPERATURE, TA OC

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

OUTPUT CURRENT, Io (A)

(V) (50mV/div)

OUTPUT VOLTAGE

TIME, t (500ns/div)

Figure 33. Typical output ripple and noise (CO=2x47F ceramic, V

OFF VOLTAGE

= 12V, Io = I

(V) (5V/div)

ON/OFF

(V) (2V/div) V

o,max,

(V) (50mV/div)

(A) (10Adiv) V

OUTPUT CURRENT, OUTPUT VOLTAGE

TIME, t (20μs /div)

Figure 34. Transient Response to Dynamic Load Change from 50% to 100% at 12Vin, Cout = 1x47uF+1x330uF, CTune=2200pF & RTune=300

(V) (5V/div)

(V) (2V/div) V

OUTPUT VOLTAGE ON

Figure 35. Typical Start-up Using On/Off Voltage (Io = I

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

o,max

OUTPUT VOLTAGE INPUT VOLTAGE

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

o,max

= 12V, Io =

Page 13

Preliminary Data Sheet

12A Digital SlimLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 12A Output Current

Design Considerations

Input Filtering

The 12A Digital SlimLynxTM 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 12A of load current with 2x22 µF or 3x22 µF ceramic capacitors and an input of 12V.

450

400

350

300

250

200

150

100

Figure 37. Input ripple voltage for various output voltages with 2x22 µF or 3x22 µF ceramic capacitors at the input (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 3x0.047 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, measured with a scope with its Bandwidth limited to 20MHz for different external capacitance values at various Vo and a full load current of 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 described later in this data sheet.

1x22uF

2x22 uF

0.511.522.533.544.55

feature

2x47uF Ext Cap

4x47uF Ext Cap

6x47uF Ext Cap

8x47uF Ext Cap

Ripple (mVp-p)

0.5 1 1.5 2 2.5 3 3.5 4 4.5 5

Output Voltage(Volts)

Figure 38. Output ripple voltage for various output voltages with external 2x47 µF, 4x47 µF, 6x47 µF or 8x47 µF ceramic capacitors at the output (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 (e.g. ABC Bussmann) with a maximum rating of 20 A in the positive input lead

Page 14

Preliminary Data Sheet

12A Digital SlimLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 12A Output 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

The 12A Digital SlimLynxTM 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 20kΩ.

+VIN

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

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 the minimum of 3V.

Rpullup

ON/OFF

+VIN

SlimLynx Module

VIN

20K

GND

Rpullup

ON/OFF

20K

SlimLynx Module

20K

GND

20K

100pF

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.

Digital On/Off

Please see the Digital Feature Descriptions section.

3.3

470

100pF

470

100K

100

4.7K

3.3V

ENABLE

47K

20K

ENABLE

47K

20K

Page 15

─

Preliminary Data Sheet

12A Digital SlimLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 12A Output Current

Input Voltage (v)

0.511.522.533.544.555.56

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

VIN(+)

ON/OFF

SIG_GND

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, the output of the module will be 0.6Vdc.To calculate the value of the trim resistor, should be as per the following equation:

Rtrim

Rtrim is the external resistor in k

is the desired output voltage.

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

Upper

Lower

Output Voltage (V)

VO(+)

VS+

TRIM

trim

Rtrim

for a desired output voltage,

−





6.0





= k



()



LOAD

(V) Rtrim (K)

O, set

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

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 Programming Tool, available at www.lineagepower.com under the Downloads section, also calculates the values of R margin. Please consult your local GE Critical Power technical representative for additional details.

Figure 43. Circuit Configuration for margining Output voltage.

margin-up

and R

margin-down

MODULE

Digital Output Voltage Margining

Please see the Digital Feature Descriptions section.

Table 1

margin-down

for a specific output voltage and %

Trim

Rtrim

SIG_GND

, from the Trim pin

margin-up

, from the Trim pin to

Rmargin-do wn

Rmargin-up

Page 16

Preliminary Data Sheet

12A Digital SlimLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 12A Output Current

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 SlimLynx 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.

SlimLynx Module

SEQ

R1=Rtrim

100 pF

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.

The module’s output can track the SEQ pin signal with slopes of up to 0.5V/msec during power-up or power-down.

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 SlimLynx series of modules, the PMBus Output Undervoltage Fault will be tripped when sequencing

SIG_GND

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 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 150 exceeded at the thermal reference point T goes into thermal shutdown it will then wait to cool before attempting to restart.

C(typ) is

.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.

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.

Page 17

─

Preliminary Data Sheet

12A Digital SlimLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 12A Output Current

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

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

VOUT

VS+

MODULE

TRIM

RTune

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

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 Critical Power 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.

Page 18

Preliminary Data Sheet

12A Digital SlimLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 12A Output Current

Table 2. General recommended values of of R

for Vin=12V and various external ceramic capacitor

TUNE

combinations.

2x47μF 4x47μF 6x47μF 10x47μF 10x47μF

TUNE

430 390 300 240 180

TUNE

390pF 1500pF 2700pF 3300pF 8200pF

Table 3. Recommended values of R

TUNE

and C 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

1x47uF

+ 330μF Polymer

Polymer

TUNE

300 300 240 220 220 180

TUNE

2200pF 2200pF 3300pF 5600pF 12nF 47nF

ΔV

55mV 54mV 47mV 31mV 21mV 8mV

1x47uF +330μF

2x47μF

330μF

Polymer

1x47μF +

2x330μF

Polymer

3x47μF +

3x330μF Polymer

Note: The capacitors used in the Tunable Loop tables are 47 F/4 m ESR ceramic and 330 F/12 m ESR polymer capacitors.

TUNE

and

to obtain

1x47μF +

11x330μF

Polymer

Page 19

Preliminary Data Sheet

12A Digital SlimLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 12A Output Current

Digital Feature Descriptions

PMBus Interface Capability

The 12A Digital SlimLynxTM 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

MSB

Value = Mantissa x 2

Data Byte Low

Mantissa

Exponent

(1% tolerance resistors are recommended). Note that if 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 10 1 15.4 2 23.7 3 36.5 4 54.9 5 84.5 6 130 7 200

The user must know which I 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.

SIG_GND

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

C addresses are reserved in a

DDR1

DDR0

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/w r

Function PU CMD CPR POL CPA

Default Value 1 0 1 1 1

ADDR0

ADDR1

Page 20

Preliminary Data Sheet

12A Digital SlimLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 12A Output Current

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

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

Bit Value Action

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 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.

Module ignores the ON bit in the OPERATION command Module responds to the ON bit in the OPERATION command

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

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.

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 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 20k upper divider resistor inside the module, and the internal reference voltage of the module. The reference voltage V regulation voltage is then given by

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

is nominally set at 600mV, and the output

REF

RTrim

20000

V ×



 

RTrim

LOOPSCALEVOUT

is what is changed inside

REF

20000



 

RTrim

REFOUT

RTrim

Page 21

Preliminary Data Sheet

12A Digital SlimLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 12A Output Current

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

−

)(

offsetOUT

This offset voltage is added to the voltage set through the divider ratio and nominal V 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 output

REF

×= TRIMVOUTV

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)

MHOUT

)(

−

2)___(

×+

TRIMVOUTHIGHMARGINVOUT

MLOUT

)(

−

2)___(

×+

TRIMVOUTLOWMARGINVOUT

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. Note that the actual value for IOUT_OC_WARN_LIMIT will vary from module to module due

to calibration during production test, The resolution of this warning limit is 500mA. The value of the IOUT_OC_WARN_LIMIT can be stored to non-volatile memory using the STORE_DEFAULT_ALL command.

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 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:

REQOVOUT

)_(

REQUVOUT

)_(

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 SlimLynx 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]

2. Continue for four switching cycles and then shut

3. Immediate shut down followed by no restart or

4. Module output is disabled when the fault is present

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

module can also be programmed for the

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

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)

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

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

PMBus Adjustable Input Undervoltage Lockout

−

2)___(

LIMITFAULTOVVOUTV

LIMITFAULTUVVOUTV

×=

−

2)___(

×=

Page 22

Preliminary Data Sheet

12A Digital SlimLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 12A Output Current

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.

VIN_ON must be set higher than VIN_OFF. Attempting to write either VIN_ON lower than VIN_OFF or VIN_OFF higher than VIN_ON results in the new value being rejected, SMBALERT being asserted along with the CML bit in STATUS_BYTE and the invalid data bit in STATUS_CML.

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

−

2)__(

×=

ONPGOODOUT

)_(

OFFPGOODOUT

)_(

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 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.

ONGOODPOWERV

−

2)__(

×=

OFFGOODPOWERV

The PGOOD terminal can be connected through a pullup resistor (suggested value 100KΩ) 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 200s, the module makes 16 measurements each of output current, voltage and input voltage. Average values of of these 16 measurements are then calculated and placed in the appropriate registers. The 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.

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

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.

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

is the temperature corrected value of the

OUT_CORR

current measurement, I measurement value, T

READ_OUT

is the temperature of the inductor

IND

_

−󰇜× . 



is the module current

Module

bit fixed

can be

󰇠

Page 23

Preliminary Data Sheet

12A Digital SlimLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 12A Output Current

winding on the module. Since it may be difficult to measure

, 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 16bit 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 -0.125V to +0.121V, with a resolution of 0.004V. The corrected output voltage reading is then given by:

FinalV

OUT

)(

+×

OFFSETCALVOUT

GAINCALVOUTInitialV

)]__1()([

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 11 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 -2 to 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 -0.125V to +0.121V, with a resolution of 0.004V. The corrected output voltage reading is then given by:

bit fixed at zero since only positive

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

Flag

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

High Byte

Bit

Position

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

Flag

Default

Value

Default

Value

Default

Value

FinalV

)(

+×

OFFSETCALVIN

GAINCALVINInitialV

)]__1()([

Reading the Status of the Module using the PMBus

The module supports a number of status information commands implemented in PMBus. However, not all

Page 24

Preliminary Data Sheet

12A Digital SlimLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 12A Output Current

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

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

1 X 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 X 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 (000000 corresponds to the ULDT012 series of module), while bits [7:3] indicate the revision number of the module.

Bit

Position

7:2 Module Name 000001

1:0 Reserved 10

Low Byte

Flag

High Byte

Bit

Position

7:3 Module Revision Number None

2:0 Reserved 000

Flag

Default

Value

Default

Value

Page 25

Preliminary Data Sheet

12A Digital SlimLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 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

01 OPERATION

02 ON_OFF_CONFIG

03 CLEAR_FAULTS

10 WRITE_PROTECT

11 STORE_DEFAULT_ALL

12 RESTORE_DEFAULT_ALL

13 STORE_DEFAULT_CODE

14 RESTORE_DEFAULT_CODE

20 VOUT_MODE

Command Brief Description

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

Format

Bit Position

Access

Function

Default Value

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

Format

Bit Position

Access

Function

Default Value

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, 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)

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

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

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

Access

Function

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

Access

Function

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

Bit Position

Access

Function

Default Value

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 1

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

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

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 0

Unsigned Binary

Command code

Non-Volatile

Memory Storage

YES

Page 26

Preliminary Data Sheet

12A Digital SlimLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 12A Output Current

Table 6 (continued)

Hex

Code

22 VOUT_TRIM

25 VOUT_MARGIN_HIGH

26 VOUT_MARGIN_LOW

29 VOUT_SCALE_LOOP

35 VIN_ON

Command Brief Description

Apply a fixed offset voltage to the output voltage command value. Exponent is fixed at -10. The offset is VOUT_TRIMx2

Format

Bit Position

Access

7 6 5 4 3 2 1 0

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

Function

Default Value

Bit Position

Access

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

Function

Default Value

Sets the target voltage for margining the output high. Exponent is fixed at -10.

0 0 0 0 0 0 0 0

-10

Linear, two’s complement binary

High Byte

Low Byte

The offset is (VOUT_MARGIN_HIGH+VOUT_TRIM)x2

Format

Bit Position

Access

Function

Default Value

Bit Position

Access

Function

Default Value

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 0 1 0 1 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 0 0 0 1 1 1

Linear, two’s complement binary

High Byte

Low Byte

Sets the target voltage for margining the output low. Exponent is fixed at -10. The offset is (VOUT_MARGIN_LOW+VOUT_TRIM)x2

Format

Bit Position

Access

Function

Default Value

Bit Position

Access

Function

Default Value

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 0 1 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 0 1 0 0 0 1

Linear, two’s complement binary

High Byte

Low Byte

Sets the scaling of the output voltage – equal to the feedback resistor divider ratio. VOUT_SCALE_LOOP = 0.6(V)/VOUT(V)

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/w r/w

1 0 1 1 1 0 0 1 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 0 0 0 0 0 0

Linear, two’s complement binary

Exponent Mantissa

Mantissa

Sets the value of input voltage at which the module turns on. This must be higher than VIN_OFF. Supported Values are

• 2.75V

• 3V to 18V in increments of 0.5V

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 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 1 1

Linear, two’s complement binary

Exponent Mantissa

Mantissa

-10

Non-Volatile

Memory Storage

YES

Page 27

Preliminary Data Sheet

12A Digital SlimLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 12A Output Current

Table 6 (continued)

Hex

Code

36 VIN_OFF

38 IOUT_CAL_GAIN

Command Brief Description

Sets the value of input voltage at which the module turns off This must be lower than VIN_OFF. Supported Values are

• 2.5V to 17.5V in increments of 0.5V

Format

Bit Position

Access

Function

Default Value

Bit Position

Access

Function

Default Value

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

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 1 0

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

Linear, two’s complement binary

Exponent Mantissa

Mantissa

V: Variable based on factory calibration

Non-Volatile

Memory Storage

YES

39 IOUT_CAL_OFFSET

40 VOUT_OV_FAULT_LIMIT

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

Format

Bit Position

Access

Function

Default Value

Bit Position

Access

Function

Default Value

Sets the voltage level for an output overvoltage fault. Exponent is fixed at -10. Four fixed percentages of 108%, 110%, 112%and 115% are available

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 0 0

7 6 5 4 3 2 1 0

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

0 0 V: Variable based on factory calibration

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 0 1 0 1

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 0 0 1 0 1 0

Linear, two’s complement binary

Exponent Mantissa

Mantissa

Linear, two’s complement binary

High Byte

Low Byte

YES

Page 28

Preliminary Data Sheet

12A Digital SlimLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 12A Output Current

Hex

Code

41 VOUT_OV_FAULT_RESPONSE

44 VOUT_UV_FAULT_LIMIT

Command Brief Description

Instructs the module on what action to take in response to an output overvoltage fault. The options are: RSP[1:0]

00 - Module continues without interruption 01 Module continue s operation for 4 switching cycles and shuts down if

fault persists 01- Module shuts down and responds to RS[2:0] 11 – Module shuts down and attempts to restart

RS[2:0] 000 – Module does not attempt to restart 111- Module goes through normal startup continuously

Format

Bit Position

Access

Function

Default Value

Sets the voltage level for an output undervoltage fault. Exponent is fixed at -10. Four fixed percentages of 92%, 90%, 88%and 85% are available.

Format

Bit Position

Access

Function

Default Value

Bit Position

Access

Function

Default Value

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

RSP

[1]

[0]

1 1 1 1 1 1 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 0 1 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 1 1 1 1

Unsigned Binary

RS[2] RS[1] RS[0] X X X

Linear, two’s complement binary

High Byte

Low Byte

Non-Volatile

Memory Storage

YES

45 VOUT_UV_FAULT_RESPONSE

46 IOUT_OC_FAULT_LIMIT

Instructs the module on what action to take in response to a output undervoltage fault. The options are: RSP[1:0]

02 - Module continues without interruption 03 Module continue s operation for 4 switching cycles and shuts down if

fault persists

02- Module shuts down and responds to RS[2:0]

11 – Module shuts down and attempts to restart

RS[2:0] 000 – Module does not attempt to restart 111- Module goes through normal startup continuously.

Format

Bit Position

Access

Function

Default Value

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/w r/w r/w r/w r/w r r r RSP

RSP

[1]

[0]

0 0 0 0 0 1 0 0

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 r r r r r r

0 0 0 1 1 1 1 1

Unsigned Binary

RS[2] RS[1] RS[0] X X X

Linear, two’s complement binary

Exponent Mantissa

Mantissa

YES

Page 29

Preliminary Data Sheet

12A Digital SlimLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 12A Output Current

Hex

Code

4A IOUT_OC_WARN_LIMIT

5E POWER_GOOD_ON

5F POWER_GOOD_OFF

Command Brief Description

Sets the output overcurrent warning level in A

Format

Bit Position

Access

Function

Default Value

Bit Position

Access

Function

Default Value

Sets the output voltage level at which the PGOOD pin is asserted high. Exponent is fixed at -10.

Format

Bit Position

Access

Function

Default Value

Bit Position

Access

Function

Default Value

POWER_GOOD_ON LEVELS LOW HIGH 95% 105% 92% 108% 90% 110%

Sets the output voltage level at which the PGOOD pin is de-asserted low. Exponent is fixed at -10.

Format

Bit Position

Access

Function

Default Value

Bit Position

Access

Function

Default Value

POWER_GOOD_OFF LEVELS LOW HIGH 92% 108% 90% 110% 88% 112%

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

0 0 0 1 1 1 0 1

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 0 1 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 0 1 0 1 0

Linear, two’s complement binary

7 6 5 4 3 2 1 0

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

High Byte

0 0 0 0 0 1 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

Low Byte

0 1 0 1 0 0 1 0

Linear, two’s complement binary

Exponent Mantissa

Mantissa

Linear, two’s complement binary

High Byte

Low Byte

Non-Volatile

Memory Storage

YES

Page 30

Preliminary Data Sheet

12A Digital SlimLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 12A Output Current

Table 6 (continued)

Hex

Code

61 TON_RISE

78 STATUS_BYTE

79 STATUS_WORD

7A STATUS_VOUT

7B STATUS_IOUT

Command Brief Description

Sets the rise time of the output voltage during startup. Supported values are

0.6ms, 0.9ms, 1.2ms, 1.8ms, 2.7ms, 4.2ms, 6.0ms, 9.0ms

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 0

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

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

Format

Bit Position

Access

Flag

Default Value

Bit Position

Access

Flag

Default Value

7 6 5 4 3 2 1 0

r r r r r r r r

IOUT_

VOUT

OC 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 0 0 0 0 0 0 0

Unsigned Binary

X X

VOUT

IOUT_

_OV

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

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

Format

Bit Position

Access

Flag

Default Value

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

IOUT_OC X IOUT_OC_WARN X X X X X

0 0 0 0 0 0 0 0

Unsigned Binary

VIN_U

PGOO

VIN_U

TEMP CML

X X X

TEMP CML

r r

Non-Volatile

Memory Storage

YES

OTHE

Page 31

Preliminary Data Sheet

12A Digital SlimLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 12A Output Current

Table 6 (continued)

Hex

Code

7D STATUS_TEMPERATURE

7E STATUS_CML

88 READ_VIN

8B READ_VOUT

8C READ_IOUT

98 PMBUS_REVISION

Command Brief Description

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

OT_FAULT OT_WARN X X X X X X

0 0 0 0 0 0 0 0

Unsigned Binary

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

Invalid

Command

0 0 0 0 0 0 0 0

Invalid

Data

Unsigned Binary

PEC

Fail

Returns the value of the input voltage applied to the module

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 0 1 1 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

Exponent Mantissa

Mantissa

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

Mantissa

Returns the value of the output current of the module

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 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

Exponent Mantissa

Mantissa

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

Format

Bit Position

Access

Default Value

7 6 5 4 3 2 1 0

r r r r r r r r

0 0 0 1 0 0 0 1

Unsigned Binary

X X X

Other

Comm

Fault

Non-Volatile

Memory Storage

YES

Page 32

Preliminary Data Sheet

12A Digital SlimLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 12A Output Current

Table 6 (continued)

Hex

Code

A0 MFR_VIN_MIN

A4 MFR_VOUT_MIN

D0 MFR_SPECIFIC_00

D4 VOUT_CAL_OFFSET

D5 VOUT_CAL_GAIN

Command Brief Description

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

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 0 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 0 0

Linear, two’s complement binary

Exponent Mantissa

Mantissa

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

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 1 0 7 6 5 4 3 2 1 0

r r r r r r r r

0 1 1 0 0 1 1 0

Linear, two’s complement binary

Mantissa

Returns module name information (read only)

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 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 0 1 X X

Unsigned Binary

Reserved

Module Name Reserved

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). Exponent is fixed at -10.

Format

Bit Position

Access

Function

Default Value

Bit Position

Access

Function

Default Value

7 6 5 4 3 2 1 0

r/w r r r r r r r

V 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

V V V V V V V V

Linear, two’s complement binary

Mantissa

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

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 0 0 0 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

V V V V V V V V

Linear, two’s complement binary

Exponent Mantissa

Mantissa

Non-Volatile

Memory Storage

YES

Page 33

Preliminary Data Sheet

12A Digital SlimLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 12A Output Current

Table 6 (continued)

Hex

Code

D6 VIN_CAL_OFFSET

D7 VIN_CAL_GAIN

Command Brief Description

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

Bit Position

Access

Function

Default Value

Bit Position

Access

Function

Default Value

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

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/w r r r/w

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

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

0 0 V V V V V V

7 6 5 4 3 2 1 0

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

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

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

0 0 0 V V V V V

Linear, two’s complement binary

Exponent Mantissa

Mantissa

Linear, two’s complement binary

Exponent Mantissa

Mantissa

Non-Volatile

Memory Storage

YES

Page 34

Preliminary Data Sheet

12A Digital SlimLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 12A Output 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_

ind 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 120 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 50. Preferred airflow direction and location of hotspot of the module (Tref).

ref

TBD

used in the specifications

C. The

76.2_ (3.0)

Probe Location

12.7_

(0.50)

for measuring airflow and ambient temperature

flow

Figure 49. Thermal Test Setup.

Page 35

Preliminary Data Sheet

12A Digital SlimLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 12A Output Current

Example Application Circuit

Requirements: Vin: 12V Vout: 1.8V Iout: 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)

Vin+

CI3

CI2

CI1

VIN

PGOOD

MODULE

SEQ

DATA

SMBALRT#

VOUT

VS+

TRIM

DDR0

DDR1

RTUNE

CTUNE

RTrim

Vout+

CO1

CO2

CO3

GND

ON/OFF

SYNC

SIG_GND

GND

RADDR1

VS-

RADDR0

CI1 Decoupling cap - 1x0.047μF/16V ceramic capacitor (e.g. Murata LLL185R71C473MA01) CI2 2x22μF/16V ceramic capacitor (e.g. Murata GRM32ER61C226KE20) CI3 47μF/16V bulk electrolytic CO1 Decoupling cap - 1x0.047μF/16V ceramic capacitor (e.g. Murata LLL185R71C473MA01) + 0.1uF/16V 0402size

CO2 1 x 47μF/6.3V ceramic capacitor (e.g. Murata GRM31CR60J476ME19) CO3 1 x 330μF/6.3V Polymer (e.g. Sanyo Poscap) CTune 2700pF ceramic capacitor (can be 1206, 0805 or 0603 size) RTune 221 ohms SMT resistor (can be 1206, 0805 or 0603 size) RTrim 10kΩ SMT resistor (can be 1206, 0805 or 0603 size, recommended tolerance of 0.1%)

ceramic capacitor

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.

Page 36

Preliminary Data Sheet

12A Digital SlimLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 12A Output Current

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.)

Page 37

Preliminary Data Sheet

12A Digital SlimLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 12A Output Current

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.)

If unused, connect to Ground

PIN FUNCTION PIN 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

Page 38

Preliminary Data Sheet

12A Digital SlimLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 12A Output Current

Packaging Details

The 12V Digital SlimLynxTM 12A modules are supplied in tape & reel as standard. Modules are shipped in quantities of 600 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”)

Page 39

Preliminary Data Sheet

12A Digital SlimLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 12A Output Current

Surface Mount Information

Pick and Place

The 12A Digital SlimLynxTM 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 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

The encapsulated SlimLynx product can be assembled on the bottom side of a customer board. The surface tension of the solder connections between the customer board and the module are sufficient to hold the module during the top side reflow process. No additional glue or adhesive is required.

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

The 12A Digital SlimLynxTM modules have a MSL rating of 3.

C. The label also

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.

300

Per J-STD-020 Rev. D

250

Reflow Temp (°C)

200

150

Heating Zone

1°C/Second

100

Peak Temp 260° C

Reflow Time (Seconds)

* Min. Time Above 235°C

15 Seconds

*Time Above 21 7°C

Figure 51. 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).

60 Seconds

Cooling

Zone

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 packages should

Page 40

Preliminary Data Sheet

12A Digital SlimLynxTM: Non-Isolated DC-DC Power Modules

3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 12A Output Current

Ordering Information

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

Table 9. Device Codes

Device Code

Input

Voltage Range

ULDT012A0X3-SRZ 3 – 14.4Vdc 0.45 – 5.5 Vdc 12A Negative Yes CC109159703

-Z refers to RoHS compliant parts

Table 10. Coding Scheme

Package

Identifier

Family Sequencing

Option

Output

current

U LD T 012A0 X 3 -SR Z

P=Pico

U=Micro

M=Mega

G=Giga

LD=SlimLynx

Digital

Encapsulated

LV=SlimLynx

Analog

T=with EZ Sequence

X=without

sequencing

Encapsulated

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

voltage

12A X =

programm

able output

4 = positive

No entry = negative

Output

Current

On/Off

logic

On/Off

Logic

Sequencing Comcodes

Remote

Sense Options

3 = Remote

S = Surface

Sense

R = Tape &

ROHS Compliance

Z = ROHS6

Mount

Reel

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 SlimLynx User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual