Advanced Data Sheet
February 10, 2011
QBDW033A0B Series Power Modules; DC-DC Converters
36-75V
dc
Input; 9.6-12V
dc
Output; 33A Output Current
BARRACUDA™ SERIES
Features
Compliant to RoHS EU Directive 2002/95/EC (-Z
versions)
Compliant to ROHS EU Directive 2002/95/EC with
lead solder exemption (non-Z versions)
High and flat efficiency profile >95.0% at 12V
dc
, 30%
to 100% rated output
Wide input voltage range: 36-75V
dc
Delivers up to 33A
dc
output current
Remote sense and output voltage trim
Fully regulated output voltage
Output voltage adjust: 8.1V
dc
to 13.2V
dc
Low output ripple and noise
Industry standard, DOSA compliant, Quarter brick:
57.9 mm x 36.8 mm x 10.6 mm
(2.28 in x 1.45 in x 0.42 in)
Constant switching frequency
Positive remote On/Off logic
Output over current/voltage protection
Digital interface with PMBus™ Rev.1.1 compliance
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 73/23/EEC and 96/68/EEC 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 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 other systems requiring a tightly
regulated output voltage
Options
Negative Remote On/Off logic
Active load sharing (Parallel Operation)
Baseplate option (-H)
Auto restart after fault shutdown
Description
The QBDW033A0B series of dc-dc converters are a new generation of DC/DC power modules designed to support
9.6 -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 QBDW033A0B series
operate from an input voltage range of 36 to 75Vdc and provide up to 33A output current at output voltages from
8.1V
dc
to 12V
dc
in a DOSA standard quarter brick. The converter incorporates digital control, synchronous rectification
technology, a fully regulated control topology, and innovative packaging techniques to achieve efficiency approaching
97% peak at 12V
dc
output. This leads to lower power dissipations such that for many applications a heat sink is not
required. 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.
*
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: ADS10-006 ver 0.3
PDF Name: QBDW033A0B_ADS.pdf
Advanced Data Sheet
February 10, 2011
QBDW033A0B Series Power Modules; DC-DC Converters
36-75V
dc
Input; 9.6-12V
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
12.5
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)
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
It
2
Min
36
-
Typ
48
-
50
Max
75
12
Unit
V
dc
A
dc
mA
All
All
10
-
-
1
mA
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 TBD 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.
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Advanced Data Sheet
February 10, 2011
QBDW033A0B Series Power Modules; DC-DC Converters
36-75V
dc
Input; 9.6-12V
dc
Output; 33A Output Current
Electrical Specifications
(continued)
Parameter
Output Voltage Set-point
(V
IN
=V
IN,nom
, I
O
=15A, 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
=V
IN, min
to V
IN, max
)
Load (I
O
=I
O, min
to I
O, max
)
Temperature (T
A
= -40ºC to +85ºC)
Output Voltage Adjustment Range (via Trim resistor
or PMBus)
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 (Adjustable via
PMBus)
Efficiency (V
IN
=V
IN, nom
, V
O
= V
O,set
, T
A
=25°C)
I
O
= 50% I
O, max
I
O
= 100% I
O, max
Switching Frequency
Dynamic Load Response
(dIo/dt=1A/10s; V
in
=V
in
,nom; T
A
=25°C; Tested
with a 10
μF
aluminum and a 1.0
μF
tantalum
capacitor across the load.)
Load Change from Io= 50% to 75% of Io,max:
Peak Deviation
Settling Time (Vo<10% peak deviation)
Load Change from Io= 75% to 50% of Io,max:
Peak Deviation
Settling Time (Vo<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
All
C
O, max
I
o
I
O, lim
η
η
f
sw
220
0
40
96
95
TBD
70
200
10,000
33
mV
rms
mV
pk-pk
μF
A
dc
A
dc
%
%
kHz
All
All
All
All
8.1
0.2
0.2
1.0
13.2
% V
O, set
% V
O, set
% V
O, set
V
dc
Device
All
Symbol
V
O, set
Min
11.84
Typ
12
Max
12.12
Unit
V
dc
V
O
-3.0
+3.0
% V
O, set
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 Baseplate option
MTBF
FIT
Device
All
All
Min
Typ
TBD
TBD
TBD
TBD
Max
Unit
Hours
10 /Hours
g (oz.)
g (oz.)
9
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Advanced Data Sheet
February 10, 2011
QBDW033A0B Series Power Modules; DC-DC Converters
36-75V
dc
Input; 9.6-12V
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
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
) (Adjustable via PMBus)
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
. (Adjustable via PMBus)
Output Overvoltage Protection (Adjustable via
PMBus)
Overtemperature Protection (Adjustable via PMBus)
(See Feature Descriptions) (Default)
Input Undervoltage Lockout (Adjustable via PMBus)
Turn-on Threshold (Default)
Turn-off Threshold (Default)
Input Overvoltage Lockout (Adjustable via PMBus)
Turn-off Threshold (Default)
Turn-on Threshold (Default)
78
81
79
82
V
dc
V
dc
31
34.5
31.5
36
V
dc
V
dc
All
All
T
ref
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
5
-0.3
2.0
10
15
0.8
3.5
4.0
13.5
μA
V
dc
V
dc
μA
V
dc
13
TBD
TBD
TBD
TBD
17
ms
ms
ms
V
dc
°C
T
delay
,
Enable with
on/off
T
rise
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Advanced Data Sheet
February 10, 2011
QBDW033A0B Series Power Modules; DC-DC Converters
36-75V
dc
Input; 9.6-12V
dc
Output; 33A Output Current
Characteristic Curves
The following figures provide typical characteristics for the QBDW033A0B (12V, 33A) at 25ºC. The figures are identical for
either positive or negative Remote On/Off logic.
V
ON/OFF
(V) (2V/div)
V
O
(V) (5V/div)
INPUT CURRENT, I
i
(A)
INPUT VOLTAGE, V
O
(V)
OUTPUT VOLTAGE
On/Off VOLTAGE
TIME, t (10 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.
V
O
(V) (200mV/div)
I
O
(A) (10A/div)
OUTPUT CURRENT, I
O
(A)
OUTPUT CURRENT OUTPUT VOLTAGE
EFFCIENCY,
η
(%)
TIME, t (500
μs/div)
Figure 2. Typical Converter Efficiency Vs. Output
current at Room Temperature.
Figure 5. Typical Transient Response to Step change
in Load from 25% to 50% to 25% of Full Load at Room
Temperature and 48 Vdc Input.
OUTPUT CURRENT OUTPUT VOLTAGE
V
O
(V) (200mV/div)
I
O
(A) (10A/div)
INPUT VOLTAGE
OUTPUT VOLTAGE
V
O
(V) (5V/div)
V
IN
(V) (20V/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 Step Change
in Load from 50% to 75% to 50% of Full Load at Room
Temperature and 48 Vdc Input.
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