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Driver Integrates Four Channels In Single Compact IC to Shrink Board Size by 50 percent

8th May 2009

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International Rectifier has introduced the IRS2093 driver IC for high performance Class D Audio applications from 50W to 150W including home theater systems and car audio amplifiers. Based upon a half bridge topology, the IRS2093 integrates four channels of high-voltage, high performance Class D audio amplifier drivers with PWM modulators in a single IC. Housed in a compact MLPQ48 package, the new IC shrinks board size by a further 50 percent compared to previous offerings.

With the addition of an external MOSFET and passive components, a complete four channel Class D audio amplifier can be realized in a 50 percent smaller footprint, delivering the efficiency and size advantages of Class D while providing the high audio performance traditionally associated with Class AB solutions.

The IRS2093 offers error amplifier, PWM comparator, gate driver, and robust protection circuitry. In addition the new 200V device features 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.

The IC may be co-designed with IR’s extensive range of digital audio MOSFETs addressing output power from 50W to 150W. These MOSFETs have been optimized around parameters critical to audio performance such as efficiency, THD, and EMI. The devices are RoHS compliant and industrial qualified.