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

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FEATURES

• IGBT OUTPUTS

• WIDE SUPPLY RANGE—16-450V

• 20A TO 100°C CASE

• 3 PROTECTION CIRCUITS

• SYNCHRONIZED OR EXTERNAL OSCILLATOR

• FLEXIBLE FREQUENCY CONTROL

APPLICATIONS

• MOTORS

• REACTIVE LOADS

• MAGNETIC BEARINGS

• LARGE PIEZO ELEMENTS

• OFF-LINE DRIVERS

• C-D WELD CONTROLLER

DESCRIPTION

The SA08 is a pulse width modulation amplifier that can

supply 9KW to the load. An internal oscillator requires no

external components. The clock input stage divides the oscil-

lator frequency by two, which provides the switching frequency

of 22.5 kHz. The oscillator may also be used to synchronize

multiple amplifiers. Current sensing is provided for each half

of the bridge giving 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 IGBTs 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

MOTOR TORQUE CONTROL

EXTERNAL CONNECTIONS

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

SA08

12-PIN POWER DIP

PACKAGE STYLE CR