Data Sheet
November 9, 2007
QBK033A0B Series Power Modules; DC-DC Converters
36-60 Vdc Input; 12Vdc Output; 33A Output Current
RoHS Compliant
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 efficiency – 94.5% at 12V full load
Delivers up to 33A output current
Low output ripple and noise
Industry standard Quarter brick:
57.9 mm x 36.8 mm x 10.6 mm
(2.28 in x 1.45 in x 0.42 in)
Applications
Distributed power architectures
Intermediate bus voltage applications
Servers and storage applications
Networking equipment including Power over
Ethernet (PoE)
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)
ISO** 9001 certified manufacturing facilities
UL*
60950-1 Recognised,
CSA
†
C22.2 No. 60950-3-01
‡
Certified, and EN 60950-1 (VDE 0805): 2001-12
Licensed
CE mark meets 73/23/EEC and 93/68/EEC directives
§
2250 Vdc Isolation tested in compliance with IEEE
802.3
¤
PoE standards
Options
Negative Remote On/Off logic
Active load sharing (Parallel Operation)
Baseplate option (-H)
Auto restart after fault shutdown
Case ground pin
Description
The QBK033A0B 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. The QBK033A0B series operate off an input voltage range from 36 to 60Vdc and provide up to 33A
output current at 12V in an industry standard quarter brick. The converter incorporates synchronous rectification
technology and innovative packaging techniques to achieve efficiency reaching 94.5% at 12V full load. This leads to
lower power dissipations such that for many applications a heat sink is not required.
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.
†
Document No: DS05-018 ver 1.17
PDF Name: QBK033A0B_ds.pd
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 the required procedures for CE marking of end-user
equipment should be followed. (The CE mark is placed on selected products.)
** ISO is a registered trademark of the International Organization of Standards
¤ IEEE and 802 are registered trademarks of the Institute of Electrical and Electronics Engineers, Incorporated.
Data Sheet
November 9, 2007
QBK033A0B Series Power Modules; DC-DC Converters
36 – 60 Vdc Input; 12Vdc 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
Non- operating continuous
Operating Ambient Temperature
(See Thermal Considerations section)
Storage Temperature
All
T
stg
-55
125
°C
Vdc
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
V
IN
T
A
-0.3
-0.3
-40
60
75
85
Vdc
Vdc
°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 60V, I
O
=I
O, max
)
Inrush Transient
Input Reflected Ripple Current, peak-to-peak
(5Hz to 20MHz, 12μH source impedance; V
IN
= 48V,
I
O
= I
Omax
; see Figure 9)
Input Ripple Rejection (120Hz)
All
It
2
Device
Symbol
V
IN
I
IN,max
Min
36
-
Typ
48
-
Max
60
13
Unit
Vdc
Adc
2
-
-
1
As
All
-
24
-
mAp-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 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.
Tyco Electronics Power Systems
2
Data Sheet
November 9, 2007
QBK033A0B Series Power Modules; DC-DC Converters
36 – 60 Vdc Input; 12Vdc Output; 33A Output Current
Electrical Specifications
(continued)
Parameter
Output Voltage Set-point
(V
IN
=V
IN,nom
, I
O
=15A, T
a
=25°C)
Device
All
Symbol
V
O, set
Min
Typ
12
Max
Unit
V
dc
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 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 Capacitance
Output Current
Output Current Limit Inception
Efficiency
V
IN
=V
IN, nom
, T
A
=25°C
I
O
=I
O, max ,
V
O
= V
O,set
Switching Frequency
Dynamic Load Response
(dIo/dt=1A/10μs; 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
All
All
All
All
All
All
All
All
All
V
O
11.4
⎯
12.6
V
dc
⎯
⎯
⎯
0.2
3
150
0.3
5
250
%Vo
%Vo
mV
⎯
⎯
C
O, max
I
o
I
O, lim
η
f
sw
0
0
⎯
⎯
⎯
70
200
⎯
⎯
⎯
10,000
33
mV
rms
mV
pk-pk
μF
Adc
Adc
%
kHz
38
94.5
300
⎯
⎯
⎯
V
pk
t
s
V
pk
t
s
⎯
__
300
700
⎯
__
mV
μs
mV
μs
__
__
300
700
__
Isolation Specifications
Parameter
Isolation Capacitance
Isolation Resistance
Symbol
C
iso
R
iso
Min
⎯
10
Typ
2000
⎯
Max
⎯
⎯
Unit
pF
MΩ
Tyco Electronics Power Systems
3
Data Sheet
November 9, 2007
QBK033A0B Series Power Modules; dc-dc Converters
36 – 60 Vdc Input; 12Vdc Output; 33A Output Current
General Specifications
Parameter
Calculated MTBF (I
O
=80% of I
O, max
, T
A
=40°C,
airflow=1m/s(200LFM))
Weight – Open Frame
Weight – with Baseplate option
Device
All
⎯
⎯
Min
Typ
1,423,448
49 (1.73)
63.5 (2.24)
⎯
⎯
Max
Unit
Hours
g (oz.)
g (oz.)
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
)
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
.
(Min @ V
IN,MAX
, Typ@ V
IN,NOM
, Max @ V
IN,MIN
)
Output Overvoltage Protection (Clamp)
Overtemperature Protection
(See Feature Descriptions)
Input Undervoltage Lockout
Turn-on Threshold
Turn-off Threshold
⎯
32
35
34
36
⎯
V
V
All
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
V
μA
V
Device
Symbol
Min
Typ
Max
Unit
T
delay,
Enable with
Vin
⎯
20
⎯
ms
T
delay
,
Enable with
All
All
All
on/off
⎯
29
13
⎯
5
40
⎯
125
⎯
68
15
⎯
ms
ms
V
°C
T
rise
T
ref
4
Tyco Electronics Power Systems
Data Sheet
November 9, 2007
QBK033A0B Series Power Modules; DC-DC Converters
36 – 60 Vdc Input; 12Vdc Output; 33A Output Current
Characteristic Curves
The following figures provide typical characteristics for the QBK033A0B (12V, 33A) at 25ºC. The figures are identical
for either positive or negative Remote On/Off logic.
14
12
On/Off VOLTAGE OUTPUT VOLTAGE
INPUT CURRENT, I
i
(A)
10
8
Io=32A
Io=16A
6
4
2
0
30
33
36
39
42
45
48
51
54
57
60
Io=0A
INPUT VOLTAGE, V
O
(V)
V
ON/OFF
(V) (2V/div)
V
O
(V) (5V/div)
TIME, t (10 ms/div)
Figure 1. Typical Input Characteristic at Room
Temperature.
96
95
94
Figure 4. Typical Start-Up Using Remote On/Off,
negative logic version shown.
OUTPUT VOLTAGE, OUTPUT CURRENT
EFFCIENCY,
η
(%)
93
92
91
90
89
88
87
86
0
5
10
15
20
25
30
35
Vin=36V
Vin=48V
Vin=60V
OUTPUT CURRENT, I
O
(A)
(V) (200mV/div)
I
O
(A) (5A/div)
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 VOLTAGE, OUTPUT CURRENT
OUTPUT VOLTAGE,
60 Vin
V
O
(V) (100mV/div)
48 Vin
36 Vin
TIME, t (1μs/div)
(V) (200mV/div)
I
O
(A) (5A/div)
TIME, t (500
μs/div)
Figure 3. Typical Output Ripple and Noise at Room
Temperature and I
o
= I
o,max
.
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.
Tyco Electronics Power Systems
5
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