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LW025 Single-Output-Series Power Modules: 36 Vdc to 75 Vdc Inputs; 25 W

Tyco Electronics 

Advance Data Sheet

March 1999

LW025 Single-Output-Series Power Modules:

36 Vdc to 75 Vdc Inputs; 25 W

Features

The LW025 Single-Output-Series Power Modules use

advanced, surface-mount technology and deliver high-quality,

compact, dc-dc conversion at an economical price.

Options

■ Choice of on/off configuration

■ Case ground pin

■ Synchronization

■ Short pins: 2.79 mm ± 0.25 mm

(0.110 in. ± 0.010 in.)

■ Short pins: 3.68 mm ± 0.25 mm

(0.145 in. ± 0.010 in.)

Description

■ Low profile: 9.91 mm (0.390 in.) with 0.38 mm

(0.015 in.) standoffs, 9.53 mm (0.375 in.) with

standoffs recessed

■ Wide input voltage range: 36 Vdc to 75 Vdc

■ Input-to-output isolation

■ Operating case temperature range: –40 °C to

+110 °C

■ Metal case

■ Overcurrent protection

■ Remote on/off

■ Output voltage adjust: 90% to 110% of VO, nom

■ Output overvoltage protection

■ UL* 1950 Recognized, CSA† C22.2 No. 950-95

Certified, VDE 0805 (EN60950, IEC950) Licensed

■ CE mark meets 73/23/EEC and 93/68/EEC

directives‡

■ Within FCC and EN55022 (CISPR 22) Class A

radiated limits

Applications

■ Distributed power architectures

■ Telecommunications

The LW025 Single-Output-Series Power Modules are low-profile dc-dc converters that operate over an input

voltage range of 36 Vdc to 75 Vdc and provide precisely regulated outputs. The output is isolated from the

input, allowing versatile polarity configurations and grounding connections. The module has a maximum power

rating of 25 W at a typical full-load efficiency of 79%.

The power modules feature remote on/off and output voltage adjustments of 90% to 110% of the nominal out-

put voltage. 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.

‡ This product is intended for integration into end-use equipment. All the required procedures for CE marking of end-use equipment should

be followed. (The CE mark is placed on selected products.)

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