International Rectifier has introduced a Class D audio chipset comprising the IRS20965 digital audio driver IC with protected pulse width modulation (PWM) switching and a full complement of audio MOSFETs optimised for high-performance audio amplifier applications.
The driver features high- and low-side independent floating PWM input to allow deadtime control from an external PWM controller. Shoot-through prevention logic provides additional safety in the event of PWM controller failure. The IC also features an over-current sensing output and 2 A gate drive output capability.
Operating up to 800 kHz, other key features of the IRS20965 include programmable, bidirectional over-current detection with self-reset function, high noise immunity, ±100 V ratings to deliver up to 500 W output power and 3,3 V / 5 V logic compatible input.
The new chipset brings the additional flexibility of an external controller which programs performance and protection features. For example, it allows non-shutdown overload protection while maintaining high audio performance.
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