Data Sheet
May 2000
QW050A1 and QW075A1 Power Modules:
dc-dc Converters; 36 to 75 Vdc Input, 5 Vdc Output; 50 W and 75 W
Features
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Small size: 36.8 mm x 57.9 mm x 12.7 mm
(1.45 in. x 2.28 in. x 0.50 in.)
High power density
High efficiency: 84% typical
Low output noise
Constant frequency
Industry-standard pinout
Metal baseplate
2:1 input voltage range
Overvoltage and overcurrent protection
Remote on/off
Remote sense
Adjustable output voltage
Overtemperature protection
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The QW Series Power Modules use advanced, surface-mount
technology and deliver high-quality, efficient, and compact
dc-dc conversion.
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Applications
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Distributed power architectures
Workstations
Computer equipment
Communications equipment
ISO
* 9001 Certified manufacturing facilities
UL
†
1950 Recognized,
CSA
‡
C22.2 No. 950-95
Certified, and
VDE
§
0805 (EN60950, IEC950)
Licensed
CE mark meets 73/23/EEC and 93/68/EEC direc-
tives**
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Options
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Heat sinks available for extended operation
Auto-restart after overcurrent shutdown
*
ISO
is a registered trademark of the International Organization
for Standardization.
†
UL
is a registered trademark of Underwriters Laboratories, Inc.
‡
CSA
is a registered trademark of Canadian Standards Associa-
tion.
§
VDE
is a trademark of Verband Deutscher Elektrotechniker e.V.
** This product is intended for integration into end-use equipment.
All the required procedures for CE marking of end-use equip-
ment should be followed. (The CE mark is placed on selected
products.)
Description
The QW050A1 and QW075A1 Power Modules are dc-dc converters that operate over an input voltage range of
36 Vdc to 75 Vdc and provide a precisely regulated dc output. The outputs are fully isolated from the inputs,
allowing versatile polarity configurations and grounding connections. The modules have maximum power rat-
ings from 50 W to 75 W at a typical full-load efficiency of 84%.
The sealed modules offer a metal baseplate for excellent thermal performance. Threaded-through holes are pro-
vided to allow easy mounting or addition of a heat sink for high-temperature applications. The standard feature set
includes remote sensing, output trim, and remote on/off for convenient flexibility in distributed power applications.
ETC [ ETC ]
