Preliminary Data Sheet
January 21, 2011
QBVW033A0B Series Power Modules; DC-DC Converters
36-75V
dc
Input; 12V
dc
Output; 33A Output Current
BARRACUDA SERIES
Features
Compliant to RoHS EU Directive 2002/95/EC (-Z
versions)
High and flat efficiency profile – >95.5% at 12V
dc
,
30% load to 100% output
Wide Input voltage range: 36-75V
dc
Delivers up to 33A
dc
output current
Fully very tightly regulated output voltage
Low output ripple and noise
Industry standard, 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)
UL* 60950-1 Recognized,
CSA
†
C22.2 No. 60950-1-
‡
03 Certified, and
VDE
0805:2001-12 (EN60950-1)
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
RoHS
Compliant
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)
Base plate option (-H=option code)
Passive Droop Load Sharing (-P=option code)
Description
The QBVW033A0B series of dc-dc converters are a new generation of 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 QBVW033A0B series
operate from an input voltage range of 36 to 75Vdc and provide up to 33A output current at output voltages of 12V
dc
in an industry standard 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.
*
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.
Document No: pds10-018 ver 0.5
PDF Name: QBVW033A0B_PDS.pdf
Preliminary Data Sheet
January 21, 2011
QBVW033A0B Series Power Modules; DC-DC Converters
36-75V
dc
Input; 12V
dc
Output; 33A 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 device reliability.
Parameter
Input Voltage*
Continuous
Operating transient
≤
100mS
Operating Input transient slew rate, 50V
IN
to 75V
IN
(Output may exceed regulation limits, no protective
shutdowns shall activate, C
O
=220µF to C
O, max
)
Non- operating continuous
Operating Ambient Temperature
(See Thermal Considerations section)
Storage Temperature
All
T
stg
-55
125
°C
V
dc
I/O Isolation Voltage (100% factory Hi-Pot tested)
All
2250
* 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
TBD
100
85
V
dc
V
dc
V/µs
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 Reflected Ripple Current, peak-to-peak
(5Hz to 20MHz, 12μH source impedance; V
IN
= 48V,
I
O
= I
Omax
; see Figure 10)
Input Ripple Rejection (120Hz)
All
Device
Symbol
V
IN
I
IN,max
I
IN,No load
I
IN,stand-by
100
It
2
Min
36
-
Typ
48
-
80
Max
75
12
Unit
V
dc
A
dc
mA
All
All
All
22
-
-
-
1
mA
μF
As
2
-
All
-
24
-
mA
p-p
All
-
50
-
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.
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2
Preliminary Data Sheet
January 21, 2011
QBVW033A0B Series Power Modules; DC-DC Converters
36-75V
dc
Input; 12V
dc
Output; 33A Output Current
Electrical Specifications
(continued)
Parameter
Output Voltage Set-point
(V
IN
=V
IN,nom
, I
O
=TBDA, T
A
=25°C)
Output Voltage
(Over all operating input voltage, resistive load, and
temperature conditions until end of life)
Output Regulation
Line (V
IN
=TBDV to V
IN, 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
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 75% 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
__
mV
pk
s
mV
pk
s
All
All
All
All
All
C
O, max
I
O
I
O, lim
0
0
40
70
200
10,000
33
mV
rms
mV
pk-pk
μF
A
dc
A
dc
All
All w/o -P
-P Option
All
1.0
1.0
0.2
0.2
% V
O, set
% V
O, set
V
dc
% V
O, set
Device
All
Symbol
V
O, set
V
O
Min
TBD
TBD
Typ
12.00
Max
TBD
12.36
Unit
V
dc
% V
O, set
All
η
f
sw
95.5
96.0
150
%
kHz
__
__
300
700
__
Isolation Specifications
Parameter
Isolation Capacitance
Isolation Resistance
Symbol
C
iso
R
iso
Min
10
Typ
1000
Max
Unit
pF
MΩ
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
MTBF
FIT
Device
All
All
Typ
TBD
TBD
47.4 (1.67)
66.4 (2.34)
Unit
Hours
10 /Hours
g (oz.)
g (oz.)
9
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3
Preliminary Data Sheet
January 21, 2011
QBVW033A0B Series Power Modules; DC-DC Converters
36-75V
dc
Input; 12V
dc
Output; 33A Output Current
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 or
operation of Remote On/Off from Off to On with Vin
already applied for at least one second.
T
rise
= Time for V
O
to rise from 10% of V
O,set
to 90%
of V
O,set
, I
O
must be < 50% I
O, max
.
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)
76
81
79
V
dc
V
dc
34
32
35
33
36
34
V
dc
V
dc
All
All
All
T
delay,
Enable with
Vin
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
μA
V
dc
V
dc
μA
V
dc
TBD
150
10
15
ms
ms
ms
°C
T
delay
,
Enable with
on/off
T
rise
T
ref
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4
Preliminary Data Sheet
January 21, 2011
QBVW033A0B Series Power Modules; DC-DC Converters
36-75V
dc
Input; 12V
dc
Output; 33A Output Current
Characteristic Curves, 12V
dc
Output
The following figures provide typical characteristics for the QBVW033A0B (12V, 33A) at 25ºC. The figures are identical for
either positive or negative Remote On/Off logic.
INPUT VOLTAGE, V
O
(V)
OUTPUT VOLTAGE On/Off VOLTAGE
V
O
(V) (5V/div)
V
ON/OFF
(V)(2V/div)
INPUT CURRENT, I
i
(A)
TIME, t (5 ms/div)
Figure 1. Typical Input Characteristic at Room
Temperature.
Figure 4. Typical Start-Up Using Remote On/Off with
Vin applied, negative logic version shown.
OUTPUT CURRENT OUTPUT VOLTAGE
I
O
(A) (5A/div)
V
O
(V) (200mV/div)
EFFCIENCY,
η
(%)
OUTPUT CURRENT, I
O
(A)
TIME, t (500
μs/div)
Figure 2. Typical Converter Efficiency Vs. Output
current at Room Temperature and 48 Vdc Input.
Figure 5. Typical Transient Response to 0.1A/µs Step
Change in Load from 25% to 50% to 25% of Full Load
at Room Temperature, Co=470µF and 48 Vdc Input.
OUTPUT CURRENT OUTPUT VOLTAGE
I
O
(A) (10A/div
)
V
O
(V) (200mV/div)
OUTPUT VOLTAGE INPUT VOLTAGE
V
IN
(V) (20V/div)
V
O
(V) (5V/div)
TIME, t (20 ms/div)
TIME, t (500
μs/div)
Figure 3. Typical Start-Up Using Vin with Remote
On/Off enabled, negative logic version shown.
Figure 6. Typical Transient Response to 0.1A/µs Step
Change in Load from 50% to 75% to 50% of Full Load
at Room Temperature, Co=470µF and 48 Vdc Input.
5
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