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Data Sheet

April 24, 2013

40A Digital MegaDLynx

: Non-Isolated DC-DC Power Modules

4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current

Features

 Compliant to RoHS EU Directive 2011/65/EU (Z versions)

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

 Compatible in a Pb-free or SnPb reflow environment (Z

versions)

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

 Output voltage programmable from 0.6Vdc to 2.0Vdc via

external resistor. Digitally adjustable down to 0.45Vdc

 Digital interface through the PMBus

TM #

protocol

 Tunable Loop

to optimize dynamic output voltage

response

 Power Good signal

 Fixed switching frequency with capability of external

synchronization

 Output overcurrent protection (non-latching)

 Over temperature protection

 Remote On/Off

 Ability to sink and source current

 Cost efficient open frame design

 Small size: 33.02 mm x 13.46 mm x 10.9 mm

(1.3 in x 0.53 in x 0.429 in)

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

 Ruggedized (-D) version able to withstand high levels of

shock and vibration

 UL* 60950-1 2

Ed. Recognized, CSA

†

C22.2 No. 60950-1-

07 Certified, and VDE

‡

(EN60950-1 2

Ed.) Licensed

 ISO** 9001 and ISO 14001 certified manufacturing facilities

Applications

 Industrial equipment

 Distributed power architectures

 Intermediate bus voltage applications

 Telecommunications equipment

 Servers and storage applications

 Networking equipment

Description

The 40A Digital Mega DLynx

power modules are non-isolated dc-dc converters that can deliver up to 40A of output current.

These modules operate over a wide range of input voltage (V

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

from 0.45Vdc to 2.0Vdc, 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)

TRIM

VOUT

VS+

GND

RTUNE

CTUNE

RTrim

VIN

Cin

Vout+

Vin+

ON/OFF

SEQ

MODULE

PGOOD

SMBALRT#

SIG_GND

ADDR1

RADDR0

CLK

DATA

ADDR0

VS-

RADDR1

GND

SYNC

RoHS Compliant

Summary of content (36 pages)

PAGE 1
GE Data Sheet 40A Digital MegaDLynxTM: Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current Features  Compliant to RoHS EU Directive 2011/65/EU (Z versions)  Compliant to IPC-9592 (September 2008), Category 2, ClassII  Compatible in a Pb-free or SnPb reflow environment (Z versions)  Wide Input voltage range (4.5Vdc-14.4Vdc)  Output voltage programmable from 0.6Vdc to 2.0Vdc via external resistor. Digitally adjustable down to 0.
PAGE 2
GE Data Sheet 40A Digital MegaDLynxTM: Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A 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.
PAGE 3
GE Data Sheet 40A Digital MegaDLynxTM: Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current Electrical Specifications (continued) Parameter Device Symbol Min Output Voltage Set-point (with 0.1% tolerance for external resistor used to set output voltage) All VO, set -1.0 Output Voltage (Over all operating input voltage, resistive load, and temperature conditions until end of life) All VO, set -3.
PAGE 4
GE Data Sheet 40A Digital MegaDLynxTM: Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current General Specifications Parameter Device Calculated MTBF (IO=0.8IO, max, TA=40°C) Telecordia Issue 2 Method 1 Case 3 Min Typ Max 6,498,4 38 All  Weight 11.7 (0.41) Unit Hours  g (oz.) Feature Specifications Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions.
PAGE 5
GE Data Sheet 40A Digital MegaDLynxTM: Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current Feature Specifications (cont.) Parameter Device Symbol Min Typ Max Units Over Temperature Protection (See Thermal Considerations section) All Tref 145 °C PMBus Over Temperature Warning Threshold* All TWARN 130 °C Tracking Accuracy (Power-Up: 0.5V/ms) All VSEQ –Vo 100 mV (Power-Down: 0.
PAGE 6
GE Data Sheet 40A Digital MegaDLynxTM: Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A 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 Input High Voltage (CLK, DATA) VIH 2.
PAGE 7
GE Data Sheet 40A Digital MegaDLynxTM: Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current Characteristic Curves The following figures provide typical characteristics for the 40A Digital Mega DLynxTM at 0.6Vo and 25oC. 90 45 EFFICIENCY,  (%) OUTPUT CURRENT, Io (A) 40 85 Vin=4.5V 80 Vin=12V Vin=14V 75 70 0.
PAGE 8
GE Data Sheet 40A Digital MegaDLynxTM: Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current Characteristic Curves The following figures provide typical characteristics for the 40A Digital Mega DLynxTM at 1.2Vo and 25oC. 95 45 40 Vin=4.5V Vin=12V 85 OUTPUT CURRENT, Io (A) EFFICIENCY,  (%) 90 Vin=14.4V 80 75 NC 0.
PAGE 9
GE Data Sheet 40A Digital MegaDLynxTM: Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current Characteristic Curves The following figures provide typical characteristics for the 40A Digital Mega DLynxTM at 1.8Vo and 25oC. 100 45 Vin=12V 40 OUTPUT CURRENT, Io (A) 95 EFFICIENCY,  (%) 90 Vin=4.5V 85 Vin=14.4V 80 75 NC 30 0.5m/s (100LFM) 25 1.
PAGE 10
GE Data Sheet 40A Digital MegaDLynxTM: Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current Design Considerations 40 6x47uF Ext Cap Input Filtering To minimize input voltage ripple, ceramic capacitors are recommended at the input of the module. Figure 19 shows the input ripple voltage for various output voltages at 40A of load current with 4x22 µF, 6x22µF or 8x22uF ceramic capacitors and an input of 12V.
PAGE 11
GE Data Sheet 40A Digital MegaDLynxTM: Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current Analog Feature Descriptions MODULE 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).
PAGE 12
GE Data Sheet 40A Digital MegaDLynxTM: Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current 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.
PAGE 13
GE Data Sheet 40A Digital MegaDLynxTM: Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current 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. DLynx Module V SEQ To provide protection in a fault condition, the unit is equipped with a thermal shutdown circuit.
PAGE 14
GE Data Sheet 40A Digital MegaDLynxTM: Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current Paralleling with Active Load Sharing (-P Option)  If the Sequencing function is being used to start-up and shut down modules and the module is being held to 0V by the tracking signal then there may be small deviations on the module output. This is due to controller duty cycle limitations encountered in trying to hold the voltage down near 0V.
PAGE 15
GE Data Sheet 40A Digital MegaDLynxTM: Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current Tunable LoopTM The module has a feature that optimizes transient response of the module called Tunable LoopTM. External capacitors are usually added to the output of the module for two reasons: to reduce output ripple and noise (see Figure 38) and to reduce output voltage deviations from the steady-state value in the presence of dynamic load current changes.
PAGE 16
GE Data Sheet 40A Digital MegaDLynxTM: Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current Digital Feature Descriptions address resistor value is outside the range specified in Table 4, the module will respond to address 127. PMBus Interface Capability Table 4 The 40A Digital Mega DLynxTM power modules have a PMBus interface that supports both communication and control. The PMBus Power Management Protocol Specification can be obtained from www.pmbus.
PAGE 17
GE Data Sheet 40A Digital MegaDLynxTM: Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A 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.
PAGE 18
GE Data Sheet 40A Digital MegaDLynxTM: Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current 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).
PAGE 19
GE Data Sheet 40A Digital MegaDLynxTM: Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current 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.
PAGE 20
GE Data Sheet 40A Digital MegaDLynxTM: Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current VOUT ( Final )  [VOUT ( Initial )  (1  VOUT _ CAL _ GAIN )] STATUS_WORD: Returns two bytes of information with a summary of the module’s fault/warning conditions. Low Byte  VOUT _ CAL _ OFFSET Measuring Input Voltage Using the PMBus The module can provide input voltage information using the READ_VIN command.
PAGE 21
GE Data Sheet 40A Digital MegaDLynxTM: Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current STATUS_TEMPERATURE: Returns one byte of information relating to the status of the module’s temperature related faults. Bit Position Flag 7 6 5 4 3 2 1 0 OT Fault OT Warning X X X X X X Default Value 0 0 0 0 0 0 0 0 STATUS_CML : Returns one byte of information relating to the status of the module’s communication related faults.
PAGE 22
GE Data Sheet 40A Digital MegaDLynxTM: Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A 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 Command Non-Volatile Memory Storage Brief Description Turn Module on or off.
PAGE 23
GE Data Sheet 40A Digital MegaDLynxTM: Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current Table 6 (continued) Hex Code Command 22 VOUT_TRIM 25 VOUT_MARGIN_HIGH 26 29 35 April 24, 2013 VOUT_MARGIN_LOW VOUT_SCALE_LOOP VIN_ON Non-Volatile Memory Storage Brief Description Apply a fixed offset voltage to the output voltage command value. Exponent is fixed at -10.
PAGE 24
GE Data Sheet 40A Digital MegaDLynxTM: Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.
PAGE 25
GE Data Sheet 40A Digital MegaDLynxTM: Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current Table 6 (continued) Hex Code Command 44 45 VOUT_UV_FAULT_LIMIT VOUT_UV_FAULT_RESPONSE 46 4A 5E April 24, 2013 IOUT_OC_FAULT_LIMIT IOUT_OC_WARN_LIMIT POWER_GOOD_ON Non-Volatile Memory Storage Brief Description Sets the voltage level for an output undervoltage fault. Exponent is fixed at -10.
PAGE 26
GE Data Sheet 40A Digital MegaDLynxTM: Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current Table 6 (continued) Hex Code 5F Command Brief Description Non-Volatile Memory Storage POWER_GOOD_OFF Sets the output voltage level at which the PGOOD pin is de-asserted low. Exponent is fixed at 10.
PAGE 27
GE Data Sheet 40A Digital MegaDLynxTM: Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.
PAGE 28
GE Data Sheet 40A Digital MegaDLynxTM: Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.
PAGE 29
GE Data Sheet 40A Digital MegaDLynxTM: Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current TTable 6 (continued) Hex Code D6 D7 April 24, 2013 Command VIN_CAL_OFFSET VIN_CAL_GAIN Brief Description Non-Volatile Memory Storage 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.
PAGE 30
GE Data Sheet 40A Digital MegaDLynxTM: Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A 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.
PAGE 31
GE Data Sheet 40A Digital MegaDLynxTM: Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current Example Application Circuit Requirements: Vin: 12V Vout: 1.8V Iout: 30A max., worst case load transient is from 20A to 30A Vout: 1.5% of Vout (27mV) for worst case load transient Vin, ripple 1.
PAGE 32
GE Data Sheet 40A Digital MegaDLynxTM: Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A 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 33
GE Data Sheet 40A Digital MegaDLynxTM: Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A 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.
PAGE 34
GE Data Sheet 40A Digital MegaDLynxTM: Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current Packaging Details The 12V Digital Mega DLynxTM 40A modules are supplied in tape & reel as standard. Modules are shipped in quantities of 140 modules per reel. All Dimensions are in millimeters and (in inches). Reel Dimensions: Outside Dimensions: Inside Dimensions: 330.2 mm (13.00) 177.8 mm (7.00”) Tape Width: 56.00 mm (2.
PAGE 35
GE Data Sheet 40A Digital MegaDLynxTM: Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current Pick and Place The 40A Digital Mega DLynxTM 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.
PAGE 36
GE Data Sheet 40A Digital MegaDLynxTM: Non-Isolated DC-DC Power Modules 4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current Ordering Information Please contact your GE Sales Representative for pricing, availability and optional features. Table 7. Device Codes Device Codes Input Voltage Range Output Voltage Output Current On/Off Logic Sequencing Comcodes MDT040A0X3-SRPHZ 4.5 – 14.4Vdc 0.45 – 2.0Vdc 40A Negative Yes CC109159760 MDT040A0X43-SRPHZ 4.5 – 14.4Vdc 0.45 – 2.