2A, HALF-BRIDGE DRIVER

FEATURES

••••• Source or sink 5A peak

••••• Half-bridge with internal diodes

••••• TTL input compatibility

••••• Either dual- or tri-state output

••••• Direct PWM motor drive from microprocessor

••••• Built-in thermal protection

••••• SG3635P replaces UDN2935Z

HIGH RELIABILITY FEATURES

- SG1635

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♦ Available to MIL-STD-883

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♦ LMI level "S" processing available

DESCRIPTION

The SG1635 is a monolithic integrated circuit designed to interface

low-level logic signals with high-current, inductive, or capacitive

loads. This device is particularly adept at high-speed pulse width

modulation for motor drives or Class D audio amplifiers, and when

used in pairs, they can provide full bridge drive for bi-directional

control.

With TTL-compatible units, this device will either source or sink up

to 5A of peak current with interlock protection to insure that source

and sink cannot be on simultaneously. Additional protection is

provided by thermal shutdown of the source output if the chip

temperature rises above 160°C. High speed internal commutating

diodes are also included.

BLOCK DIAGRAM - SG1635/3635

6/91 Rev 1.1 5/94

Copyright

© 1994

11861 Western Avenue

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∞ Garden Grove, CA 92841

1

(714) 898-8121

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∞ FAX: (714) 893-2570

SG1635/SG3635

TRUTH TABLE

Enable

Pulse

Output

0

0

High

0

1

High

1

0

Low

1

1

Off - High Z

1 = Open or High