PWS745
Multi-Channel Isolated
DC/DC CONVERTER COMPONENTS
FEATURES
q
COMPACT SIZE
q
LOW COST PER CHANNEL
q
DRIVES UP TO 8 CHANNELS
q
750/1500VAC ISOLATION
q
FLEXIBLE USE WITH PWS740/PWS750
COMPONENTS
q
0.4 IN. MAXIMUM MOUNTING HEIGHT
APPLICATIONS
q
INDUSTRIAL CONTROL
q
GROUND-LOOP ELIMINATION
q
PC-BASED DATA ACQUISITION
q
POINT-OF-USE POWER CONVERSION
q
5V TO
鹵
15V FROM DIGITAL SUPPLIES
DESCRIPTION
The PWS745 is a set of components useful in the
construction of single or multi-channel isolated
DC/DC converters. By themselves, or in combination
with the PWS740 and PWS750 families of compo-
nents, they allow compact, optimal, and low-cost so-
lutions to many power supply problems.
The PWS745-1 DIP oscillator/driver can be used to
drive up to eight channels of independently isolated
power. The switching MOSFETs are built into the
driver to allow simple low-cost assembly of the multi-
channel converter. The PWS745-1 also is capable of
operating at 5VDC and can be easily synchronized
with TTL level signals. While offering the user an
alternative to the TO-3 package of the PWS740, the
PWS745-1
V
IN
DRIVE
GATE
T
TTL
IN
Oscillator
TTL
OUT
Driver
COM2
GND
Soft Start
DRIVE
GATE
鈥?Tucson, AZ 85734 鈥?Street Address: 6730 S. Tucson Blvd. 鈥?Tucson, AZ 85706
Telex: 066-6491 鈥?FAX: (520) 889-1510 鈥?Immediate Product Info: (800) 548-6132
廬
PWS745-1 also allows the user to select varying levels
of power, isolation voltage, mounting technology and
system configuration by choosing among the several
component families. For example, the PWS745-1 can
directly drive the PWS740, PWS745, or PWS750
transformers. It also can drive the FETs of a PWS750
distributed power system. The operating frequency is
compatible with the ISO120 family of isolation ampli-
fiers and is capable of multi-channel synchronized
operation to eliminate troublesome beat frequencies.
The PWS745-2 is a 15V to
鹵15V
output version, while
the PWS745-4 is the 5V to
鹵15V
output version. The
PWS740-3 high-speed bridge provides a convenient
rectifier for the selected transformer output.
PWS745-2 (15V Operation)
PWS745-4 (5V Operation)
T
O
AC
COM1
V
D
GND
T
T
O
AC
International Airport Industrial Park 鈥?Mailing Address: PO Box 11400
Tel: (520) 746-1111 鈥?Twx: 910-952-1111 鈥?Cable: BBRCORP 鈥?/div>
漏 1990 Burr-Brown Corporation
PDS-1095
1
Printed in U.S.A. March, 1992
PWS745
next