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AN1042 - High Fidelity Switching Audio Amplifiers Using TMOS Power MOSFETs

Key Features

  • d generates rise and fall times of about 30 nanoseconds. It is designed to put out a maximum current of ±5 amp.

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Datasheet Details

Part number AN1042
Manufacturer onsemi
File Size 121.27 KB
Description High Fidelity Switching Audio Amplifiers Using TMOS Power MOSFETs
Datasheet download datasheet AN1042 Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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AN1042/D High Fidelity Switching Audio Amplifiers Using TMOS Power MOSFETs Prepared by: Donald E. Pauly ON Semiconductor Special Consultant http://onsemi.com APPLICATION NOTE With the introduction of complementary bipolar power transistors in the late 1960s, switching amplifiers became theoretically practical. At low frequencies, bipolar transistors have switching efficiencies of 99% and will directly drive a low impedance speaker filter. The requirement for switching frequencies above 100 kHz resulted in excessive losses however. Bipolar drive circuitry was also complex because of its large base current requirement. With the advent of complementary (voltage/current ratings) TMOS power MOSFETs, gate drive circuitry has been simplified.