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FEATURES
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IGBT OUTPUTS
WIDE SUPPLY RANGE—16-450V
20A TO 100°C CASE
3 PROTECTION CIRCUITS
SYNCHRONIZED OR EXTERNAL OSCILLATOR
FLEXIBLE FREQUENCY CONTROL
APPLICATIONS
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MOTORS
REACTIVE LOADS
MAGNETIC BEARINGS
LARGE PIEZO ELEMENTS
OFF-LINE DRIVERS
C-D WELD CONTROLLER
EXTERNAL CONNECTIONS
12-PIN POWER DIP
PACKAGE STYLE CR
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.
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BLOCK DIAGRAM AND TYPICAL APPLICATION
MOTOR TORQUE CONTROL
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APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL prodlit@apexmicrotech.com
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