Pulse width modulation amplifier
M.S. Kennedy Corporation
switchmode amplification in severe operating conditions. The MSK 4205 can be used as a drop in replacement for the
APEX SA03 in applications that do not utilize the thermal limit feature. All of the drive/control circuitry for the lowside and
highside are internal to the device. The clock input stage divides the internal oscillator frequency by two, which provides the
switching frequency of 22.5KHz. An external oscillator may be used to lower the frequency or synchronize multiple amplifiers. Current sensing is provided for each half of the bridge and fixed highside current limit is provided internally. Lowside
current limit is user controlled with the use of an external resistor network. An internal highside charge pump allows 100%
duty cycle. The design is packaged in a hermetic 12 pin bolt down power package.
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