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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 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 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.
SA03 Maximum Ratings
SUPPLY VOLTAGE, +VS.................................................. 100V SUPPLY VOLTAGE, VCC ....................................................16V POWER DISSIPATION, internal ....................................300W TEMPERATURE, pin solder - 10s ...................................300 TEMPERATURE, junction2 .............................................150 TEMPERATURE, storage .................................65 to +150 OPERATING TEMPERATURE RANGE, case .......55 to +125 INPUT VOLTAGE, +PWM ........................................0 to +11V INPUT VOLTAGE, PWM....................................... 0 to +11V INPUT VOLTAGE, ILIM ...........................................0 to +10V
SA03 Features
• WIDE SUPPLY RANGE-16-100V • 30A CONTINUOUS TO 60 CASE • 3 PROTECTION CIRCUITS • ANALOG OR DIGITAL INPUTS • SYNCHRONIZED OR EXTERNAL OSCILLATOR • FLEXIBLE FREQUENCY CONTROL
SA03 Typical Application
• MOTORS TO 4HP • REACTIVE LOADS • LOW FREQUENCY SONAR • LARGE PIEZO ELEMENTS • OFF-LINE DRIVERS • C-D WELD CONTROLLER