GE
36-75Vdc Input; 12.0Vdc, 25.0A, 300W Output
Data Sheet
QBVW025A0B Barracuda* Series; DC-DC Converter Power Modules
RoHS Compliant
Features
Compliant to RoHS II EU “Directive 2011/65/EU (-Z versions)
Compliant to REACH Directive (EC) No 1907/2006
High and flat efficiency profile – >95.5% at 12V
dc
, 40% load to
100% output
Wide Input voltage range: 36-75V
dc
Delivers up to 25A
dc
output current
Fully very tightly regulated output voltage
Low output ripple and noise
Industry standard, DOSA Compliant Quarter brick:
58.4 mm x 36.8 mm x 11.7 mm
(2.30 in x 1.45 in x 0.46 in)
Constant switching frequency
Positive Remote On/Off logic
Output over current/voltage protection
Over temperature protection
Wide operating temperature range (-40°C to 85°C)
ANSI/ UL
#
60950-1-2011 Recognized, CAN/CSA
†
C22.2
No.60950-1-07, Second Edition + A1:2011 (MOD) Certified IEC
60950-1:2005 (2nd edition) + A1:2009 and EN 60950-1:2006 +
A11:2009 + A1:2010 + A12:2011, and VDE‡ 0805-1 Licensed
CE mark to 2006/96/EC directive
§
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
¤
PoE
standards
ISO** 9001 and ISO14001 certified manufacturing facilities
Applications
Distributed power architectures
Intermediate bus voltage applications
Servers and storage applications
Networking equipment including Power over Ethernet
(PoE)
Fan assemblies and 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)
Remote Sense and Output Voltage Trim (9=option
code)
Base plate option (-H=option code)
Passive Droop Load Sharing (-P=option code)
Description
The QBVW025A0B Barracuda series of dc-dc converters are a new generation of fully regulated DC/DC power modules designed
to support 12Vdc intermediate bus applications where multiple low voltages are subsequently generated using point of load
(POL) converters, as well as other application requiring a tightly regulated output voltage. The QBVW025A0B series operate from
an input voltage range of 36 to 75Vdc and provide up to 25A output current at output voltages of 12V
dc
in an industry standard,
DOSA compliant quarter brick. The converter incorporates digital control, synchronous rectification technology, a fully regulated
control topology, and innovative packaging techniques to achieve efficiency exceeding 96% at 12V output. This leads to lower
power dissipations such that for many applications a heat sink is not required. Standard features include on/off control, output
overcurrent and over voltage protection, over temperature protection, input under and over voltage lockout.
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.
* Trademark of General Electric Company
# 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.
May 9, 2013
©2012 General Electric Company. All rights reserved.
Page 1
GE
36-75Vdc Input; 12.0Vdc, 25.0A, 300W Output
Absolute Maximum Ratings
Data Sheet
QBVW025A0B Barracuda™ Series; DC-DC Converter Power Modules
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
Input Voltage*
Continuous
Operating transient
≤
100mS
Non- operating continuous
Operating Ambient Temperature
(See Thermal Considerations section)
Storage Temperature
All
T
stg
-55
125
2250
°C
V
dc
I/O Isolation Voltage (100% factory Hi-Pot tested)
All
* Input over voltage protection will shutdown the output voltage when the input voltage exceeds threshold level.
All
V
IN
T
A
80
-40
V
IN
-0.3
75
100
100
85
V
dc
V
dc
V
dc
°C
Device
Symbol
Min
Max
Unit
Electrical Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions.
Parameter
Operating Input Voltage
Maximum Input Current
(V
IN
=0V to 75V, I
O
=I
O, max
)
Input No Load Current
(V
IN
= V
IN, nom
, I
O
= 0, module enabled)
Input Stand-by Current
(V
IN
= V
IN, nom
, module disabled)
External Input Capacitance
Inrush Transient
Input Terminal Ripple Current
(Measured at module input pin with maximum specified input
capacitance and 500uH inductance between voltage source
and input capacitance)
5Hz to 20MHz, V
IN
= 48V, I
O
= I
Omax
Input Reflected Ripple Current, peak-to-peak
(5Hz to 20MHz, 12μH source impedance; V
IN
= 48V, I
O
= I
Omax
; see
Figure 11)
Input Ripple Rejection (120Hz)
All
-
40
-
mA
p-p
All
-
350
-
mA
rms
All
All
All
All
I
2
t
Device
Symbol
V
IN
I
IN,max
I
IN,No load
I
IN,stand-by
100
-
-
-
Min
36
-
Typ
48
-
80
22
-
1
Max
75
9
Unit
V
dc
A
dc
mA
mA
μF
A
2
s
All
-
25
-
dB
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 30 A in the ungrounded input lead of the power supply (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.
May 9, 2013
©2012 General Electric Company. All rights reserved.
Page 2
GE
36-75Vdc Input; 12.0Vdc, 25.0A, 300W Output
Electrical Specifications
(continued)
Data Sheet
QBVW025A0B Barracuda™ Series; DC-DC Converter Power Modules
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions.
Parameter
Output Voltage Set-point (V
IN
=V
IN,nom
, I
O
=12.5A, T
A
=25°C)
Output Voltage
(Over all operating input voltage (40V to 75V), resistive load, and
temperature conditions until end of life)
Output Voltage (V
IN
=36V, T
A
= 25ºC)
Output Regulation[V
IN, min
= 40V]
Line (V
IN
= V
IN, min
to V
IN, max
)
Line (V
IN
= V
IN, min
to V
IN, max
)
Load (I
O
=I
O, min
to I
O, max
)
Load (I
O
=I
O, min
to I
O, max
)
Load (I
O
=I
O, min
to I
O, max
), Intentional Droop
Temperature (T
A
= -40ºC to +85ºC)
Output Ripple and Noise on nominal output
(V
IN
=V
IN, nom
and I
O
=I
O, min
to I
O, max
)
RMS (5Hz to 20MHz bandwidth)
Peak-to-Peak (5Hz to 20MHz bandwidth)
External Output Capacitance
For C
O
>5000uF, I
O
must be < 50% I
O, max
during T
rise
.
Output Current
Output Current Limit Inception
Efficiency (V
IN
=V
IN, nom
, T
A
=25°C)
I
O
=100% I
O, max ,
V
O
= V
O,set
I
O
=40% I
O, max
to 100% I
O, max ,
V
O
= V
O,set
Switching Frequency
Dynamic Load Response
dI
O
/d
t
=1A/10s; V
in
=V
in
,
nom
; T
A
=25°C;
(Tested with a 1.0μF ceramic, a 10μF tantalum, and 470μF
capacitor and across the load.)
Load Change from I
O
= 50% to 75% of I
O,max
:
Peak Deviation
Settling Time (V
O
<10% peak deviation)
Load Change from I
O
= 75% to 50% of I
O,max
:
Peak Deviation
Settling Time (V
O
<10% peak deviation)
All
V
pk
t
s
V
pk
t
s
__
__
__
300
700
300
700
__
__
mV
pk
s
mV
pk
s
All
All
η
η
f
sw
96.0
95.5
150
%
%
kHz
All
All
All
All
All
C
O, max
I
O
I
O, lim
0
0
30
70
200
10,000
25
mV
rms
mV
pk-pk
μF
A
dc
A
dc
All w/o 9
option
All w/ 9
option
All w/o P or
9 option
All w/ 9
option
All w/ P
Option
All
0.2
0.5
0.2
1.2
0.40
2
% V
O, set
% V
O, set
% V
O, set
% V
O, set
V
dc
% V
O, set
Device
All
All w/o -P
-P Option
All
Symbol
V
O, set
V
O
V
O
V
O
Min
11.97
11.76
11.68
11.15
Typ
12.00
Max
12.03
12.24
12.32
Unit
V
dc
V
dc
V
dc
V
dc
General Specifications
Parameter
Calculated Reliability Based upon Telcordia SR-332 Issue 2:
Method
I,
Case 1, (I
O
=80%I
O, max
, T
A
=40°C, Airflow = 200 lfm), 90%
confidence
Weight – Open Frame
Weight – with Base plate option
May 9, 2013
©2012 General Electric Company. All rights reserved.
MTBF
FIT
Device
All
All
Typ
3,598,391
277.9
47.4 (1.67)
66.4 (2.34)
Unit
Hours
10
9
/Hours
g (oz.)
g (oz.)
Page 3
GE
36-75Vdc Input; 12.0Vdc, 25.0A, 300W Output
Isolation Specifications
Parameter
Isolation Capacitance
Isolation Resistance
Symbol
C
iso
R
iso
Min
10
Typ
1000
Data Sheet
QBVW025A0B Barracuda™ Series; DC-DC Converter Power Modules
Max
Unit
pF
MΩ
Feature Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions. See
Feature Descriptions for additional information.
Parameter
Remote On/Off Signal Interface
(V
IN
=V
IN, min
to V
IN, max
, Signal referenced to V
IN-
terminal)
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
Logic Low Specification
On/Off Thresholds:
Remote On/Off Current – Logic Low (Vin =100V)
Logic Low Voltage
Logic High Voltage – (Typ = Open Collector)
Logic High maximum allowable leakage current
(V
on/off
= 2.0V)
Maximum voltage allowed on On/Off pin
Turn-On Delay and Rise Times (I
O
=I
O, max
)
T
delay
=Time until V
O
= 10% of V
O,set
from either application
of Vin 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
delay
due to startup for parallel modules.
T
rise
=Time for V
O
to rise from 10% to 90% of V
O,set
, For C
O
>5000uF, I
O
must be < 50% I
O, max
during T
rise
.
* Increased T
rise
when pre-bias Vo exists at startup for
parallel modules.
Load Sharing Current Balance
(difference in output current across all modules with
outputs in parallel, no load to full load)
Remote Sense Range
Output Voltage Adjustment range
Output Overvoltage Protection
Overtemperature Protection
(See Feature Descriptions)
Input Undervoltage Lockout
Turn-on Threshold (Default)
Turn-off Threshold (Default)
Input Overvoltage Lockout
Turn-off Threshold (Default)
Turn-on Threshold (Default)
May 9, 2013
76
©2012 General Electric Company. All rights reserved.
86
79
V
dc
V
dc
Page 4
All w/o P
option
All w/o P
option
All w/ P
option
All w/ P
option
All w/o P
option
All w/ P
option
P Option
All w/ 9
option
All w/ 9
option
All w/o 9
option
All w/ 9
option
All
T
delay Enable
,
Device
Symbol
Min
Typ
Max
Unit
All
All
All
All
All
I
on/off
V
on/off
V
on/off
I
on/off
V
on/off
280
-0.3
2.0
310
0.8
14.5
10
14.5
150
10
180*
40*
15
300*
3
μA
V
dc
V
dc
μA
V
dc
ms
ms
ms
ms
ms
ms
A
V
dc
V
dc
V
dc
V
dc
°C
with Vin
T
delay, Enable
with on/off
T
delay
,
Enable
with Vin
T
delay, Enable
with on/off
T
rise
T
rise
I
diff
V
Sense
V
O, set
V
O,limit
V
O,limit
T
ref
8.1
14.5
V
O,set
+2.5V
140
0.5
13.2
17.0
V
O,set
+5.0V
33
31
35
33
36
34
V
dc
V
dc
GE
36-75Vdc Input; 12.0Vdc, 25.0A, 300W Output
Characteristic Curves, 12V
dc
Output
Data Sheet
QBVW025A0B Barracuda™ Series; DC-DC Converter Power Modules
The following figures provide typical characteristics for the QBVW025A0B (12V, 25A) at 25ºC. The figures are identical for either
positive or negative Remote On/Off logic.
INPUT CURRENT, I
i
(A)
INPUT VOLTAGE, V
O
(V)
EFFCIENCY,
η
(%)
OUTPUT CURRENT, I
O
(A)
Figure 1. Typical Input Characteristic.
Figure 2. Typical Converter Efficiency Vs. Output Current.
OUTPUT VOLTAGE,
V
O
(V) (50mV/div)
OUTPUT CURRENT
I
O
(A) (5A/div)
OUTPUT VOLTAGE
V
O
(V) (200mV/div)
TIME, t (2s/div)
TIME, t (500
μs/div)
Figure 3. Typical Output Ripple and Noise, I
o
= I
o,max
.
Figure 4. Typical Transient Response to 0.1A/µs Step Change
in Load from 50% to 75% to 50% of Full Load, Co=470µF and
48 Vdc Input.
OUTPUT VOLTAGE INPUT VOLTAGE
V
IN
(V) (20V/div)
V
O
(V) (5V/div)
TIME, t (20 ms/div)
OUTPUT VOLTAGE
V
O
(V) (5V/div)
On/Off VOLTAGE
V
ON/OFF
(V)(2V/div)
TIME, t (5 ms/div)
Figure 5. Typical Start-Up Using Vin with Remote On/Off
enabled, negative logic version shown.
Figure 6. Typical Start-Up Using Remote On/Off with Vin
applied, negative logic version shown.
May 9, 2013
©2012 General Electric Company. All rights reserved.
Page 5
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