WP05R 5/98 REV B

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FEATURES

SMALL PACKAGE SIZE: 1" X 2"

INDUSTRY STANDARD PINOUT

SURFACE MOUNT DEVICES (SMD)

LOW-COST ALTERNATE SOURCE

CONTINUOUS SHORT CIRCUIT PROTECTION

UL1950 RECOGNITION

(SOME MODELS PENDING)

MEETS FCC CLASS B

APPLICATIONS

TELECOMMUNICATION EQUIPMENT

BATTERY POWERED SYSTEMS

PORTABLE INSTRUMENTS

PROCESS CONTROL EQUIPMENT

TRANSPORTATION EQUIPMENT

DISTRIBUTED POWER SYSTEMS

SPACE-CRITICAL APPLICATIONS

DESCRIPTION

The WP05R Series is a family of high performance DC/DC

converters that offer high efficiency and regulated outputs

over a 2:1 input voltage range of either 18-36VDC or 36-

72 VDC.

Surface mount devices and manufacturing technology make

it possible to offer performance equivalent to competition

at a lower cost.

A self oscillating flyback topology coupled with a rugged

MOSPOWER transistor are used to produce a highly reli-

able product with a minimum parts count. The internal

body diodes of these FETS protect the unit against input

voltage reversal. An external fuse is required to limit the

body diode current to 2 amps.

The WP05R Series offers low noise (approximately 50 to

75mVp-p) without the addition of an external capacitor.

The series is also 6-sided shielded, further reducing

system noise. This shield is connected to -VIN.

No external heatsink is required for the WP05R Series

to supply its rated 5 watts. With a minimum amount of

airflow, the temperature range may be extended from

70°C to 85°C. (See derating curve.)

The package of the WP05R Series is plastic. This

eliminates the layout precautions required by metal

enclosed devices. The encapsulant material is rated

UL94V-0 for flammability and offers excellent heat

transfer characteristics.

Internal circuitry provides continuous short-circuit pro-

tection and automatic restart after the short is removed.

Product Data Sheet

3400 E Britannia Drive

Tucson, Arizona 85706

Phone: 520.295.4100

Fax: 520.770.9369

Internet: http://www.cdpowerelectronics.com

WP05R