Data Sheet
May 2000
QW050F1 and QW075F1 Power Modules:
dc-dc Converters; 36 to 75 Vdc Input, 3.3 Vdc Output; 33 W to 50 W
Applications
I
Distributed power architectures
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Workstations
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Computer equipment
I
Communications equipment
Options
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Heat sinks available for extended operation
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Auto-restart after overcurrent shutdown
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.)
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High power density
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High efficiency: 81% typical
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Low output noise
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Constant frequency
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Industry-standard pinout
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Metal baseplate
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2:1 input voltage range
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Overvoltage and overcurrent protection
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Remote on/off
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Remote sense
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Adjustable output voltage
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Overtemperature protection
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ISO* 9001 Certified manufacturing facilities
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UL
1950 Recognized, CSA
C22.2 No. 950-95
Certified, and VDE
§
0805 (EN60950, IEC950)
Licensed
I
CE mark meets 73/23/EEC and 93/68/EEC direc-
tives**
* ISOis a registered trademark of the International Organization
for Standardization.
ULis a registered trademark of Underwriters Laboratories, Inc.
CSAis a registered trademark of Canadian Standards Associa-
tion.
§ VDEis 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.)
The QW Series Power Modules use advanced, surface-mount
technology and deliver high-quality, efficient, and compact
dc-dc conversion.
Description
The QW050F1 and QW075F1 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 33 W to 50 W at a typical full-load efficiency of 81%.
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.