GE Industrial Solutions EBDW020A0B User Manual

GE

Data Sheet

EBDW020A0B Barracuda™ Series; DC-DC Converter Power Modules

36-75Vdc Input; 12.0Vdc, 20.0A, 240W Output

RoHS Compliant

Applications

 Distributed power architectures
 Intermediate bus voltage applications
 Servers and storage applications
 Networking equipment including Power over Ethernet

(PoE)



Fan assemblies other systems requiring a tightly
regulated output voltage

Options

 Negative Remote On/Off logic (1=option code, factory

preferred)

 Auto-restart after fault shutdown (4=option code, factory

preferred)

 Base plate option (-H=option code)
 Passive Droop Load Sharing (-P=option code)

Features

 Compliant to RoHS II EU “Directive 2011/65/EU (-Z versions)
 Compliant to REACH Directive (EC) No 1907/2006
 Compatible with reflow pin/paste soldering process
 High and flat efficiency profile >95.4% at 12V

rated output

 Wide input voltage range: 36-75V
 Delivers up to 20A
 Remote sense and output voltage trim
 Fully very tightly regulated output voltage
 Output voltage adjust (via PMBus): 5.0V
 Low output ripple and noise
 No reverse current during prebias start-up or shut-down
 Industry standard, DOSA compliant Eighth brick:

58.4 mm x 22.8 mm x 11.3 mm
(2.30 in x 0.90 in x 0.44 in)

 Constant switching frequency
 Positive remote On/Off logic
 Output over current/voltage protection
 Digital interface with PMBus™ Rev.1.2 compliance^
 Over temperature protection
 Wide operating temperature range (-40°C to 85°C)
 CAN/CSA† C22.2 No. 60950-1-07, 2nd Edition + A1:2011

(MOD), ANSI/UL*60950-1-2011, IEC 60950-1 (2nd edition);
am1, and VDE‡ (EN60950-1, 2nd Ed.) Licensed

 CE mark 2006/96/EC directives
 Meets the voltage and current requirements for ETSI 300-

132-2 and complies with and licensed for Basic insulation
rating per EN60950-1

 2250 Vdc Isolation tested in compliance with IEEE 802.3

standards



ISO** 9001 and ISO14001 certified manufacturing facilities

output current

dc

dc

§

dc

to 13.2Vdc

dc

, 55% to 90%

¤

PoE

Description

The EBDW020A0B Barracuda™ series of dc-dc converters are a new generation of DC/DC power modules designed to support 9.6

-12V

intermediate bus applications where multiple low voltages are subsequently generated using point of load (POL) converters,

dc

as well as other application requiring a tightly regulated output voltage. The EBDW020A0B series operate from an input voltage
range of 36 to 75V

output voltages of 12.1V

rectification technology, a fully regulated control topology and innovative packaging techniques to achieve efficiency reaching

95.4% peak at 12V
Standard features include output voltage trim, remote sense, on/off control, output overcurrent and over voltage protection, over
temperature protection, input under and over voltage lockout, power good signal and PMBus interface.

The output is fully isolated from the input, allowing versatile polarity configurations and grounding connections. Built-in filtering for
both input and output minimizes the need for external filtering.

^ PMBus name and logo are registered trademarks of SMIF, Inc.
* 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.

§ This product is intended for integration into end-user equipment . All of the required procedures of end-use equipment should be followed.
¤ IEEE and 802 are registered trademarks of the Institute of Electrical and Electronics Engineers, Incorporated.
** ISO is a registered trademark of the International Organization of Standards.

, and provide up to 20A output current at output voltages from 5.0Vdc to 12.0Vdc, and 240W output power from

dc

to 13.2Vdc in a DOSA standard eighth brick. The converter incorporates digital control, synchronous

dc

output. This leads to lower power dissipations such that for many applications a heat sink is not required.

dc

April 15, 2013 ©2012 General Electric Company. All rights reserved. Page 1

GE

Data Sheet

EBDW020A0B Barracuda™ Series; DC-DC Converter Power Modules

36-75Vdc Input; 12.0Vdc, 20.0A, 240W Output

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 device reliability.

Parameter Device Symbol Min Max Unit

Input Voltage*

Continuous V

Operating transient  100mS 100 Vdc
Operating Input transient slew rate, 50VIN to 75VIN

(Output may exceed regulation limits, no protective
shutdowns shall activate, C

Non- operating continuous V

Operating Ambient Temperature All T

(See Thermal Considerations section)

Logic Pin Voltage (to SIG_GND or VO(-))
TRIM/C1, C2, ADDR0, ADDR1, CLK, DATA, SMBALERT

Storage Temperature All T

I/O Isolation Voltage (100% factory Hi-Pot tested) All

=220F to C

O

O, max

)

- - 10 V/µs

All V

IN

IN

A

pin

stg

 

* Input over voltage protection will shutdown the output voltage when the input voltage exceeds threshold level.

-0.3 75 Vdc

80 100 Vdc

-40 85 °C

-0.3 3.6 Vdc

-55 125 °C

2250 Vdc

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 VIN 36 48 75 Vdc

Maximum Input Current
(VIN=0V to 75V, IO=I

Input No Load Current

(VIN = V

IN, nom

Input Stand-by Current

(VIN = V

IN, nom

External Input Capacitance All C

Inrush Transient All I2t - - 1 A2s

Input Terminal Ripple Current
(Measured at module input pin with maximum specified input

capacitance and ൏ 500uH inductance between voltage source
and input capacitance C

)

I

Omax

Input Reflected Ripple Current, peak-to-peak
(5Hz to 20MHz, 12H source impedance; V
Figure 11)

Input Ripple Rejection (120Hz) All - 50 - dB

)

O, max

, IO = 0, module enabled)

, module disabled)

=220uF, 5Hz to 20MHz, VIN= 48V, IO=

IN

= 48V, IO= I

IN

Omax

; see

All I

All I

All - 900 - mA

All - 24 - mA

I

IN,max

IN,No load

IN,stand-by

IN

CAUTION: This power module is not internally fused. An input line fuse must always be used.

This power module can be used in a wide variety of applications, ranging from simple standalone operation to an integrated part
of sophisticated power architecture. To preserve maximum flexibility, internal fusing is not included, however, to achieve maximum
safety and system protection, always use an input line fuse. The safety agencies require a fast-acting fuse with a maximum rating
of 15 A (see Safety Considerations section). Based on the information provided in this Data Sheet on inrush energy and maximum
dc input current, the same type of fuse with a lower rating can be used. Refer to the fuse manufacturer’s Data Sheet for further
information.

- - 7 Adc

100 - - F

50 mA

25 mA

rms

p-p

April 15, 2013 ©2012 General Electric Company. All rights reserved. Page 2

GE

Data Sheet

EBDW020A0B Barracuda™ Series; DC-DC Converter Power Modules

36-75Vdc Input; 12.0Vdc, 20.0A, 240W Output

Electrical Specifications (continued)

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

Parameter Device Symbol Min Typ Max Unit

Output Voltage Set-point (Default)
(V
(Adjustable via PMBus)

Output Voltage Variation from Default
(Over all operating input voltage (40V to 75V), resistive load, and
temperature conditions until end of life)

Output Voltage (VIN=36V, TA = 25ºC) All V

Output Regulation [V

Output Ripple and Noise on nominal output

External Output Capacitance

Output Current All I
VOUT_OC_FAULT_LIMIT (Default)

(Adjustable via PMBus)
Efficiency (VIN=V
IO= 100% I
IO= 55% - 90% I
Switching Frequency (primary MOSFETs)

(Output Ripple 2X switching frequency)
Dynamic Load Response

Note (1): Polymer capacitors required.

IN=VIN,nom

, IO=10A, TA =25°C)

All V

All w/o -P V

-P Option V

= 40V]

IN, min

Line (VIN=V

Load (IO=I

Line (VIN=V

Load (IO=I

IN, min

O, min

IN, min

O, min

to V

) All w/o -P

IN, max

to I

) All w/o -P

O, max

to V

) -P Option

IN, max

to I

), Intentional Droop -P Option 0.50 Vdc

O, max

Temperature (TA = -40ºC to +85ºC) All

(VIN=V

IN, nom

and IO=I

O, min

to I

)

O, max

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

All w/o -02

All w -02

All w/o -02

All w -02

, VO= V

IN, nom

All  95.2 %

O, max

All  95.4 %

O, max

=25°C)

O,set, TA

C
C

I
I

f

(dIO/dt=1A/10s; Vin=Vin,
ceramic and 1 x 470F polymer capacitor across the load.)

Load Change from IO = 50% to 75% of I
Peak Deviation
Settling Time (V

<10% peak deviation)

O

Load Change from IO = 75% to 50% of I
Peak Deviation
Settling Time (V

<10% peak deviation)

O

(dIO/dt=1A/10s; Vin=Vin,
ceramic and 1 x 220F polymer capacitor across the load.)

Load Change from IO = 50% to 75% of I
Peak Deviation
Settling Time (V

<10% peak deviation)

O

Load Change from IO = 75% to 50% of I
Peak Deviation
Settling Time (V

<10% peak deviation)

O

; TA=25°C; tested with a 10F

nom

:

O,max

:

O,max

; TA=25°C; tested with a 10F

nom

:

O,max

:

O,max

All w/o -

02

All w/o -

02

All w -02

All w -02

O, set

OUT

OUT

O,lim

O,lim

sw

V

ts

V

ts

V

ts

V

ts

11.97 12.00 12.03 V

O

O

O

11.76

11.63

10.8










220

1

220

O

0 20 Adc








 

0.2

0.2

0.5

2

70

200



23
28

12.24 V

12.37 V










10,000
10,000




% V

% V
% V

% V

mV

mV

150 kHz

pk

pk

pk

pk

__
__

__
__

__
__

__
__

750
800

750
800

300
700

300
700

__
__

__
__

__
__

__
__

mV

mV

mV

mV

V

F
F

A
Adc

s

s

s

s

dc

dc

dc

dc

O, set

O, set

O, set

O, set

rms

pk-pk

dc

pk

pk

pk

pk

Isolation Specifications

Parameter Symbol Min Typ Max Unit

Isolation Capacitance C

Isolation Resistance R

iso 

iso

10

April 15, 2013 ©2012 General Electric Company. All rights reserved. Page 3

1000

 



pF

M

GE

Data Sheet

EBDW020A0B Barracuda™ Series; DC-DC Converter Power Modules

36-75Vdc Input; 12.0Vdc, 20.0A, 240W Output

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

Remote On/Off Signal Interface

(VIN=V

IN, min

to V

, Signal referenced to V

IN, max

Negative Logic: device code suffix “1”
Logic Low = module On, Logic High = module Off
Positive Logic: No device code suffix required
Logic Low = module Off, Logic High = module On

On/Off Thresholds:

Remote On/Off Current – Logic Low (Vin =100V) All I

Logic Low Voltage All V
Logic High Voltage – (Typ = Open Collector) All V
Logic High maximum allowable leakage current

(V

= 2.0V)

on/off

Maximum voltage allowed on On/Off pin All V

TON_DELAY and TON_RISE (IO=I

)

O, max

(Adjustable via PMBus)

T

=Time until VO = 10% of V

delay

from either application of Vin

O,set

with Remote On/Off set to On (Enable with Vin); or operation of
Remote On/Off from Off to On with Vin already applied for at
least 150 milli-seconds (Enable with on/off).
* Increased T

T

=Time for VO to rise from 10% to 90% of V

rise

>5000uF, IO must be < 50% I
* Increased T

due to startup for parallel modules.

delay

during T

when Vo exists at startup for parallel

rise

O, max

modules.
Load Sharing Current Balance
(difference in output current across all modules with outputs in
parallel, no load to full load)

Remote Sense Range All V
External Resistor Trim Range All V

VOUT_COMMAND
(Adjustable via PMBus)
VOUT_OV_FAULT_LIMIT
(Adjustable via PMBus)

OT_FAULT_LIMIT
(Adjustable via PMBus)

Input Undervoltage Lockout
(Adjustable via PMBus)

VIN_ON

VIN_OFF
Input Overvoltage Lockout

(Adjustable via PMBus)
Turn-off Threshold [VIN_OV_FAULT_LIMIT]
Turn-on Threshold
(follows VIN_OV_FAULT_LIMIT -7V)

Pull down resistance of Power Good pin
Sink current capability into Power Good pin (V

terminal)

IN-

280

-0.3

2.0





 

 





 

 

 

 

 

 



140

310 A

0.8 Vdc

14.5 Vdc

10 A

14.5 Vdc

160 ms

40 ms

180* ms

40* ms

40 ms

300* ms

3 A

0.5 Vdc

13.2 Vdc

13.2 Vdc



°C

34 35 36 Vdc
32 33.5 34.5 Vdc





85

79





150

15

Vdc

V



mA

rise

O,set

.

=2.2V)

PG

, For C

on/off

on/off

on/off

All I

All w/o -P T

All w/o-P

w/ -P T

w/ -P

O

All w/o -P T

w/ -P T

-P Option I

All V

All V

All T

All
All

on/off

on/off

delay, Enable with Vin

T

delay, Enable with

on/off

delay, Enable w ith Vin

T

delay, Enable with

on/off

rise

rise

diff

Sense

6.0

O, set

5.0

O, set

15 Vdc

O,limit

ref

dc

April 15, 2013 ©2012 General Electric Company. All rights reserved. Page 4

GE

Data Sheet

EBDW020A0B Barracuda™ Series; DC-DC Converter Power Modules

36-75Vdc Input; 12.0Vdc, 20.0A, 240W Output

General Specifications

Parameter Device Symbol Typ Unit

Calculated Reliability Based upon Telcordia SR-332 Issue
2: Method I, Case 3, (I
LFM), 90% confidence

Weight – Open Frame 30.0 (1.06) g (oz.)

Weight – with Base plate option 39.5 (1.39) g (oz.)

=80%I

O

, TA=40°C, Airflow = 200

O, max

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
(* 5-10 kHz to accommodate hosts not supporting clock
stretching)

Measurement System Characteristics

Output current reading range

Output current reading resolution

Output current reading accuracy 5A < Iout <20A I

Output current reading accuracy (absolute difference
between actual and reported values)

V

reading range

OUT

V

reading resolution

OUT

V

reading accuracy

OUT

VIN reading range

VIN reading resolution

VIN reading accuracy

Temperature reading resolution

Temperature reading accuracy

All MTBF 4,169,213 Hours

All FIT 239.9 109/Hours

=2mA VOL 0.4 V

OUT

=3.6V I

V

OUT

Slave Mode F

0.56A < Iout <5A

OH

PMB 5* 400 kHz

I

OUT(RNG)

I

0.19 A

OUT(RES)

OUT(ACC)

I

OUT(ACC)

V

0 15.9997 V

OUT(RNG)

V

0.244 mV

OUT(RES)

V

OUT(ACC)

V

0 127.875 V

IN(RNG)

V

125 mV

IN(RES)

V

IN(ACC)

T

0.25 °C

(RES)

T

(ACC)

0 10 A

0.56 63.9375 A

-5.0 4.0 %

-1.4 2.7 A

-2.0 0.6 2.0 %

-4.0 0.8 4.0 %

-5.0 5.0 %

April 15, 2013 ©2012 General Electric Company. All rights reserved. Page 5

GE

VO

(V) (5V/div

) V

ON/OFF

(V) (2V/div)

VO

(V) (5V/div) VIN(V) (20V/div)

I

O

(A) (5A/div) V

O

(V) (500mV/div)

Data Sheet

EBDW020A0B Barracuda™ Series; DC-DC Converter Power Modules

36-75Vdc Input; 12.0Vdc, 20.0A, 240W Output

Characteristic Curves

The following figures provide typical characteristics for the EBDW020A0B (12V, 20A) at 25ºC. The figures are identical for either
positive or negative Remote On/Off logic.

(A)

i

INPUT CURRENT, I

EFFCIENCY,  (%)

Figure 1. Typical Input Characteristic at Room Temperature. Figure 2. Typical Converter Efficiency Vs. Output current at

INPUT VOLTAGE, VO (V) OUTPUT CURRENT, IO (A)

Room Temperature.

OUTPUT VOLTAGE On/Off VOLTAGE

TIME, t (20 ms/div)

Figure 3. Typical Start-Up Using Remote On/Off with Vin
applied, negative logic version shown.

OUTPUT VOLTAGE INPUT VOLTAGE

TIME, t (40 ms/div)

Figure 4. Typical Start-Up Using Vin with Remote On/Off
enabled, negative logic version shown.

(V) (500mV/div)

O

OUTPUT CURRENT OUTPUT VOLTAGE

TIME, t (1 ms/div) TIME, t (1 ms/div)

Figure 5. Typical Transient Response to Step Change in Load
from 25% to 50% to 25% of Full Load at 48Vdc Input and C

O

470uF Polymer, without -02 option.

April 15, 2013 ©2012 General Electric Company. All rights reserved. Page 6

(A) (5A/div) V

O

OUTPUT CURRENT OUTPUT VOLTAGE

I

Figure 6. Typical Transient Response to Step Change in Load

=

from 50% to 75% to 50% of Full Load at 48Vdc Input and

= 470uF Polymer, without -02 option.

C

O

GE

Data Sheet

EBDW020A0B Barracuda™ Series; DC-DC Converter Power Modules

36-75Vdc Input; 12.0Vdc, 20.0A, 240W Output

Characteristic Curves

The following figures provide typical characteristics for the EBDW020A0B (12V, 20A) at 25ºC. The figures are identical for either
positive or negative Remote On/Off logic.

(continued)

(V)

O

OUTPUT VOLTAGE, V

INPUT VOLTAGE, Vin (V) INPUT VOLTAGE, Vin (V)

Figure 7. Typical Output Voltage Regulation vs. Input
Voltage at Room Temperature.

(V)

O

OUTPUT VOLTAGE, V

OUTPUT CURRENT, IO (A)

Figure 9. Typical Output Voltage Regulation vs. Output
Current for the –P Version at Room Temperature.

(V)

O

OUTPUT VOLTAGE, V

Figure 8. Typical Output Voltage Regulation vs. Input Voltage
for the –P Version at Room Temperature.

(V) (50mV/div)

O

V

OUTPUT VOLTAGE,

TIME, t (2s/div)

36 Vin

48 Vin

75 Vin

Figure 10. Typical Output Ripple and Noise at Room
Temperature I

o

= I

and and C

o,max

OMin

.

(V) (200mV/div)

O

(A) (10A/div) V

O

I

OUTPUT CURRENT OUTPUT VOLTAGE

Figure 11. Typical Transient Response to Step Change in
Load from 25% to 50% to 25% of Full Load at 48Vdc Input

= 220uF Polymer, with -02 option.

and C

O

April 15, 2013 ©2012 General Electric Company. All rights reserved. Page 7

(V) (200mV/div)

O

(A) (10A/div) V

O

I

OUTPUT CURRENT OUTPUT VOLTAGE

Figure 12. Typical Transient Response to Step Change in
Load from 50% to 75% to 50% of Full Load at 48Vdc Input
and CO= 220uF Polymer, with -02 option.

GE

Data Sheet

EBDW020A0B Barracuda™ Series; DC-DC Converter Power Modules

36-75Vdc Input; 12.0Vdc, 20.0A, 240W Output

Test Configurations

Note: Measure input reflected-ripple current with a simulated

source inductance (LTEST) of 12 µH. Capacitor CS offsets
possible battery impedance. Measure current as shown above.

Figure 13. Input Reflected Ripple Current Test Setup.

Note: Use a 1.0 µF ceramic capacitor and a 10 µF aluminum or
tantalum capacitor. Scope measurement should be made
using a BNC socket. Position the load between
51 mm and 76 mm (2 in. and 3 in.) from the module.

Figure 14. Output Ripple and Noise Test Setup.

Note: All measurements are taken at the module terminals. When
socketing, place Kelvin connections at module terminals to avoid
measurement errors due to socket contact resistance.

Figure 15. Output Voltage and Efficiency Test Setup.

SUPPLY

CONTACT

RESISTANCE

CONTACT AND

DISTRIBUTION LOSSES

O1

V

I

I

V

V

I

(+)

I

(–)

V

I

O

LOAD

O2

Design Considerations

Input Source Impedance

The power module should be connected to a low
ac-impedance source. A highly inductive source impedance
can affect the stability of the power module. For the test
configuration in Figure 13, a 100F electrolytic capacitor, C
(ESR<0.7 at 100kHz), mounted close to the power module
helps ensure the stability of the unit. If the module is subjected
to rapid on/off cycles, a 330F input capacitor is required.
Consult the factory for further application guidelines.

Safety Considerations

For safety-agency approval of the system in which the power
module is used, the power module must be installed in
compliance with the spacing and separation requirements of
the end-use safety agency standard, i.e., UL60950-1 2
CSA C22.2 No. 60950-1 2
Ed.

If the input source is non-SELV (ELV or a hazardous voltage
greater than 60 Vdc and less than or equal to 75Vdc), for the
module’s output to be considered as meeting the
requirements for safety extra-low voltage (SELV), all of the
following must be true:

 The input source is to be provided with reinforced

insulation from any other hazardous voltages, including
the ac mains.

 One V

pin and one V

IN

the input and output pins are to be kept floating.

 The input pins of the module are not operator accessible.

 Another SELV reliability test is conducted on the whole

system (combination of supply source and subject
module), as required by the safety agencies, to verify that
under a single fault, hazardous voltages do not appear at
the module’s output.

Note: Do not ground either of the input pins of the module

without grounding one of the output pins. This may
allow a non-SELV voltage to appear between the
output pins and ground.

The power module has safety extra-low voltage (SELV) outputs
when all inputs are SELV.

The input to these units is to be provided with a maximum 15 A
fast-acting (or time-delay) fuse in the unearthed lead.

The power module has internally generated voltages
exceeding safety extra-low voltage. Consideration should be
taken to restrict operator accessibility.

nd

Ed., and VDE0805-1 EN60950-1 2nd

pin are to be grounded, or both

OUT

nd

Ed.,

,

in

April 15, 2013 ©2012 General Electric Company. All rights reserved. Page 8

GE

Data Sheet

EBDW020A0B Barracuda™ Series; DC-DC Converter Power Modules

36-75Vdc Input; 12.0Vdc, 20.0A, 240W Output

Feature Descriptions

Overcurrent Protection

To provide protection in a fault output overload condition, the
EBDW020A0B module is equipped with internal current­limiting circuitry and can endure current limiting continuously.
If the overcurrent condition causes the output voltage to fall
below 4.0V, the module will shut down. The module is factory
default configured for auto-restart operation. The auto-restart
feature continually attempts to restore the operation until fault
condition is cleared. If the output overload condition still exists
when the module restarts, it will shut down again. This
operation will continue indefinitely until the overcurrent
condition is corrected.
The IOUT_OC_WARN threshold level, IOUT_OC_FAULT
threshold level, and IOUT_OC_FAULT_RESPONSE can be
reconfigured via the PMBus interface. If the FAULT_RESPONSE
is reconfigured to remain latched off following an overcurrent
shutdown, the overcurrent latch is reset by either cycling the
input power, or by toggling the on/off pin for one millisecond.

Output Overvoltage Protection

The module contains circuitry to detect and respond to output
overvoltage conditions. If the overvoltage condition causes the
output voltage to rise above the limit in the Specifications
Table, the module will shut down. The EBDW020A0B module is
factory default configured for auto-restart operation. The
auto-restart feature continually attempts to restore the
operation until fault condition is cleared. If the output
overvoltage condition still exists when the module restarts, it
will shut down again. This operation will continue indefinitely
until the overvoltage condition is corrected.

The VOUT_OV_FAULT threshold level and VOUT_OV_FAULT
_RESPONSE can be reconfigured via the PMBus interface. If the
FAULT _RESPONSE is reconfigured to remain latched off
following an overvoltage shutdown, the overvoltage latch is
reset by either cycling the input power, or by toggling the
on/off pin for one millisecond.

Overtemperature Protection

The modules feature an overtemperature protection circuit to
safeguard against thermal damage. The circuit shuts down the
module when the default maximum device reference
temperature is exceeded. The module is factory default
configured to automatically restart once the reference
temperature cools by ~25°C.

The OT_WARNING and OT_FAULT threshold levels and
OT_FAULT_RESPONSE can be reconfigured via the PMBus
interface. If the FAULT_RESPONSE is reconfigured to remain
latched off following an overtemperature shutdown, the
overtemperature latch is reset by either cycling the input
power or by toggling the on/off pin for one millisecond.

Input Under Voltage Lockout

When Vin exceeds VIN_ON, the module output is enabled,
when Vin falls below VIN_OFF, the module output is disabled.
VIN_ON and VIN_OFF can be reconfigured via the PMBus
interface. A minimum 2V hysteresis between VIN_ON and
VIN_OFF is required.

Input Over Voltage Lockout

The EBDW020A0B module contains circuitry to detect and
respond to input overvoltage conditions. If the overvoltage
condition causes the input voltage to rise above the limit in the
Specifications Table, the module will shut down. The module is
factory default configured for auto-restart operation. The
auto-restart feature continually monitors the input voltage and
will restart the module when the level falls 7V below the
VIN_OV_FAULT level.

The VIN_OV_FAULT threshold level can be reconfigured via the
PMBus interface.

Remote On/Off (i)

The module contains a standard on/off control circuit
reference to the V
on/off logic options are available. Positive logic remote on/off
turns the module on during a logic-high voltage on the
ON/OFF pin, and off during a logic LO. Negative logic remote
on/off turns the module off during a logic HI, and on during a
logic LO. Negative logic, device code suffix "1," is the factory­preferred configuration. The On/Off circuit is powered from an
internal bias supply, derived from the input voltage terminals.
To turn the power module on and off, the user must supply a
switch to control the voltage between the On/Off terminal and

(-) terminal (V

the V

IN

or equivalent (see Figure 16). A logic LO is V
The typical I
Terminal=0.3V) is 147µA. The switch should maintain a logic­low voltage while sinking 310µA. During a logic HI, the
maximum V
maximum allowable leakage current of the switch at V

2.0V is 10µA. If using an external voltage source, the maximum
voltage V
terminal.

If not using the remote on/off feature, perform one of the
following to turn the unit on:

For negative logic, short ON/OFF pin to V
For positive logic: leave ON/OFF pin open.

Figure 16. Remote On/Off Implementation.

on/off

(-) terminal. Two factory configured remote

IN

). The switch can be an open collector

on/off

during a logic LO (Vin=48V, On/Off

on/off

generated by the power module is 8.2V. The

on/off

on the pin is 14.5V with respect to the VIN(-)

on/off

(-).

IN

= -0.3V to 0.8V.

on/off

=

April 15, 2013 ©2012 General Electric Company. All rights reserved. Page 9

GE

C2

Data Sheet

EBDW020A0B Barracuda™ Series; DC-DC Converter Power Modules

36-75Vdc Input; 12.0Vdc, 20.0A, 240W Output

Feature Descriptions (continued)

Load Sharing

For higher power requirements, the EBDW020A0 power
module offers an optional feature for parallel operation (-P
Option code). This feature provides a precise forced output
voltage load regulation droop characteristic. The output set
point and droop slope are factory calibrated to insure
optimum matching of multiple modules’ load regulation
characteristics. To implement load sharing, the following
requirements should be followed:

 The V

 V

 It is permissible to use a common Remote On/Off signal to

 These modules contain means to block reverse current flow

 When parallel modules startup into a pre-biased output, e.g.

 Insure that the load is <50% I

 If fault tolerance is desired in parallel applications, output

(+) and V

OUT

connected together. Balance the trace resistance for each
module’s path to the output power planes, to insure best load
sharing and operating temperature balance.

must remain between 40Vdc and 75Vdc for droop sharing

IN

to be functional.

start all modules in parallel.

upon start-up, when output voltage is present from other
parallel modules, thus eliminating the requirement for
external output ORing devices. Modules with the –P option
will self-determine the presence of voltage on the output
from other operating modules, and automatically increase its
Turn On delay, T
Table.

partially discharged output capacitance, the T
automatically increased, as specified in the Feature
Specifications Table, to insure graceful startup.

all parallel modules have started (load full start > module

time max + T

T

delay

ORing devices should be used to prevent a single module
failure from collapsing the load bus.

Remote Sense

Remote sense minimizes the effects of distribution losses by
regulating the voltage at the remote-sense connections (See
Figure 17). The SENSE(-) pin should be always connected to

(–).The voltage between the remote-sense pins and the

V

O

output terminals must not exceed the output voltage sense
range given in the Feature Specifications table:

(+) – VO(–)] – [SENSE(+) ]  0.5 V

[V

O

Although the output voltage can be increased by both the
remote sense and by the trim, the maximum increase for the
output voltage is not the sum of both. The maximum increase
is the larger of either the remote sense or the trim. The amount
of power delivered by the module is defined as the voltage at
the output terminals multiplied by the output current. When
using remote sense and trim, the output voltage of the module
can be increased, which at the same output current, would
increase the power output of the module. Care should be
taken to ensure that the maximum output power of the
module remains at or below the maximum rated power
(Maximum rated power = Vo,set x Io,max).

(-) pins of all parallel modules must be

OUT

, as specified in the Feature Specifications

delay

is

rise

(for a single module) until

O,MAX

time).

rise

Figure 17. Circuit

Configuration for remote sense.

Configurable Control Pins

The EBDW020A0B contains two configurable control pins, T/C1
and C2, referenced to the module secondary SIG_GND. See
Mechanical Views for pin locations. The following table list the
default factory configurations for the functions assigned to
these pins. Additional configurations can be accomplished via
the PMBus command, MFR_CPIN_ARA_CONFIG. Following the
table, there is a feature description for each function.

Pin Designation/Function Module

T/C1

On/Off (o) Power Good w/o -P Factory Default

Trim On/Off (o) w/o -P Via PMBus
Trim Power Good w/o -P Via PMBus

On/Off (o) Power Good with -P Factory Default

Code

Configuration

Remote On/Off(o)

The module contains an additional remote on/off control input
On/Off(o), via either the T/C1 or C2 pin, reference to the
SIG_GND pin. The factory default configuration is set to ignore
this input, unless activated by the PMBus command,
MFR_CPIN_ON_OFF_CONFIG. This command is also used to
configure the logic for the On/Off(o) pin. Positive logic remote
on/off turns the module on during a logic HI voltage on the
ON/OFF pin, and off during a logic LO. Negative logic remote
on/off turns the module off during a logic HI, and on during a
logic LO. The On/Off(o) circuit is powered from an internal bias
supply, referenced to SIG_GND. To turn the power module on
and off, the user must supply a switch to control the voltage
between the On/Off (o) terminal and the SIG_GND pin (V
The switch can be an open collector or equivalent (see Figure

14). A logic LO is V
during a logic low is 330µA. The switch should maintain a logic
LO voltage while sinking 250µA. During a logic HI, the
maximum V
maximum allowable leakage current of the switch at V

2.0V is 130µA. If using an external voltage source, the
maximum voltage V

(-) terminal.

V

i

If not using the Remote On/Off(o) feature, the pin may be left
N/C.

on/off

(o) = -0.3V to 0.8V. The typical I

on/off

(o) generated by the power module is 3.3V. The

on the pin is 3.3V with respect to the

on/off

on/off

on/off

(o)

on/off

(o)).

(o) =

April 15, 2013 ©2012 General Electric Company. All rights reserved. Page 10