Product Data Sheet
S
MALL
5 W
ATT
R
EGULATED
P
ACKAGE
DC/DC C
ONVERTER
WP05R
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擄C to 85擄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.
3400 E Britannia Drive
WP05R 5/98 REV B
Tucson, Arizona 85706
Phone: 520.295.4100
Fax: 520.770.9369
Internet: http://www.cdpowerelectronics.com
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