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PWS727
PWS728
Isolated, Unregulated
DC/DC CONVERTERS
FEATURES
q
100% TESTED FOR HIGH VOLTAGE
BREAKDOWN
q
COMPACT (28-pin DIP)
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5V OR 15V INPUT OPTIONS
q
SYNCHRONIZABLE (TTL)
APPLICATIONS
q
INDUSTRIAL PROCESS CONTROL
q
GROUND LOOP ELIMINATION
q
POINT-OF-USE ANALOG POWER
DESCRIPTION
The PWS727 is a DC/DC converter which uses mini-
mal PC board space and converts a single input 10 to
18VDC to bipolar voltages of the same value as the
input. The PWS728 converts a 4.7 to 6VDC to bipolar
voltages three times the value of the input. The con-
verters are capable of providing
卤15mA
(PWS727) or
卤12mA
(PWS728) at rated voltage and up to
卤30mA.
The PWS727 and PWS728 use a high-frequency
(800kHz nominal) surface mount oscillator that makes
it possible to minimize the transformer size. The trans-
former is composed of a split bobbin isolation trans-
former using a ferrite core and is encapsulated in a
plastic package, allowing a higher isolation voltage
rating. The design minimizes high frequency radiated
noise on the output by using a ground plane directly
under the high frequency components.
* Use a 10V zener on PWS728 to prevent
input spikes overstressing the diode bridge.
International Airport Industrial Park 鈥?Mailing Address: PO Box 11400
Tel: (602) 746-1111 鈥?Twx: 910-952-1111 鈥?Cable: BBRCORP 鈥?/div>
漏
鈥?Tucson, AZ 85734 鈥?Street Address: 6730 S. Tucson Blvd. 鈥?Tucson, AZ 85706
Telex: 066-6491 鈥?FAX: (602) 889-1510 鈥?Immediate Product Info: (800) 548-6132
PDS-987A
1989 Burr-Brown Corporation
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Printed in
PWS727/728
U.S.A. June, 1992
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