Integrated and protected Class D audio chipset
31 October 2007
Analogue, Mixed Signal, LSI
International Rectifier has introduced a chipset featuring the new IRS2092 integrated audio driver IC with protected PWM switching and IR's full complement of digital audio MOSFETs. The chipset targets medium power, high performance Class D audio amplifiers from 50 W to 500 W in home theatre, home stereo, active speaker, musical instrument and professional audio applications. Based upon a half bridge topology, the new audio driver IC integrates four essential functions for Class D design implementation including error amplifier, PWM comparator, gate driver and robust protection circuitry. As a result, this compact 16-pin IC offers high noise immunity and reduced start and stop click noise, while greatly reducing design tasks such as overload protection. Key IRS2092 features include an analog PWM modulator with frequency up to 800 kHz, programmable bidirectional over-current protection (OCP) with self-reset control, under-voltage lockout protection (UVLO), and programmable preset deadtime for a scalable power design.
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