Data Sheet
March 27, 2008
QBK025A0B Series DC-DC Converter Power Modules:
36- 55Vdc Input, 12Vdc Output and 25A 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)
Delivers up to 25A Output current
High efficiency – 94% at 12V full load
Industry standard Quarter brick footprint
57.9mm x 36.8mm x 10.6mm
(2.28in x 1.45in x 0.42in)
Low output ripple and noise
Applications
Distributed power architectures
Servers and storage applications
Optical and Access Network Equipment
Enterprise Networks
Cost efficient open frame design
Intermediate input voltage range
Output overcurrent/voltage protection
Over-temperature protection
Single optimal regulated output
Wide operating temperature range (-40
0
C to 85
0
C)
Positive logic, Remote On/Off
Options
Negative logic, Remote On/Off
Active load sharing (Parallel Operation)
Baseplate option (-H)
Auto restart after fault shutdown
Case ground pin
Complies with and is licensed for Basic Insulation
rating per EN60950-1
CE mark meets 73/23/EEC and 93/68/EEC
directives
§
UL*
60950-1Recognized,
CSA
†
C22.2 No. 60950-1-
03 Certified, and
VDE
‡
0805:2001-12 (EN60950-1)
Licensed
ISO** 9001 and ISO 14001 certified manufacturing
facilities
Description
The QBK025A0B series of DC-DC converters are an expansion of a new generation of DC/DC power modules
designed to support 12Vdc intermediate bus applications where multiple low voltages are subsequently generated
using discrete/modular point of load (POL) converters. The QBK025A0B series provide up to 25A output current in
an industry standard quarter brick, which makes it an ideal choice for small space, high current and 12V
intermediate bus voltage applications. The converter incorporates synchronous rectification technology and
innovative packaging techniques to achieve efficiency reaching 94% 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.
†
‡
CSA
is a registered trademark of Canadian Standards Association.
VDE
is a trademark of Verband Deutscher Elektrotechniker e.V.
** ISO is a registered trademark of the International Organization of Standards
Document No: DS03-096 ver. 1.46
PDF name: qbus_qbk025a0b_ds.pdf
LINEAGEPOWER [ LINEAGE POWER CORPORATION ]
