APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL prodlit@apexmicrotech.com

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FEATURES

• WIDE SUPPLY RANGE—16-100V

• 30A CONTINUOUS TO 60°C case

• 3 PROTECTION CIRCUITS

• ANALOG OR DIGITAL INPUTS

• SYNCHRONIZED OR EXTERNAL OSCILLATOR

• FLEXIBLE FREQUENCY CONTROL

APPLICATIONS

• MOTORS TO 4HP

• REACTIVE LOADS

• LOW FREQUENCY SONAR

• LARGE PIEZO ELEMENTS

• OFF-LINE DRIVERS

• C-D WELD CONTROLLER

DESCRIPTION

The SA03 is a pulse width amplifier that can supply 3000W

to the load. An internal 45kHz oscillator requires no external

components. The clock input stage divides the oscillator

frequency by two, which provides the basic switching of

22.5 kHz. External oscillators may also be used to lower the

switching frequency or to synchronize multiple amplifiers.

Current sensing is provided for each half of the bridge giv-

ing amplitude and direction data. A shutdown input turns off

all four drivers of the H bridge output. A high side current

limit and the programmable low side current limit protect the

amplifier from shorts to supply or ground in addition to load

shorts. The H bridge output MOSFETs are protected from

thermal overloads by directly sensing the temperature of the

die. The 12-pin hermetic MO-127 power package occupies

only 3 square inches of board space.

BLOCK DIAGRAM AND TYPICAL APPLICATION

EXTERNAL CONNECTIONS

M I C R O T E C H N O L O G Y

SA03

12-PIN POWER DIP

PACKAGE STYLE CR