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IR rolls out reference design for audio amplifier

Posted: 02 Sep 2004 ?? ?Print Version ?Bookmark and Share

Keywords:international rectifier? ir? iraudamp1? audio amplifier reference design? ir2011s?

International Rectifier (IR) disclosed the availability of its IRAUDAMP1 Class D audio amplifier reference design featuring the 200V-rated IR2011S high-speed gate driver IC. The IR2011S drives a pair of IRFB23N15D HEXFET MOSFETs for each channel in the power stage to provide the amplified audio PWM (pulse width modulated) waveform.

IR said that its new reference design is a complete analog input, Class D audio power amplifier with 500W + 500W peak stereo output into four ohms. The IRAUDAMP1 is based on a self-oscillating PWM modulator for the lowest component count and a robust design, with protection functions and housekeeping power supplies to simplify use. This reference design is intended to demonstrate how to use the IR2011S, implement protection circuit features and design an optimum PCB layout.

David Tam, VP of Consumer and Industrial Sector Business, said that their goal is to simplify engineers' chores in circuit design and maximize efficiency. "The IRAUDAMP1 reference design is a complete and robust solution for designers looking to move up to the performance potential of a Class D audio amplifier, and to realize a smaller footprint," Tam added.

The IR2011 200V-rated high- and low-side MOSFET driver IC is designed for 100W to 1,000W Class D audio amplifier circuits. Housed in an 8-pin DIP or SO-8 package, it has a maximum ambient temperature rating of 125C, which improves safety margins compared to similar devices rated at 85C.

The IRAUDAMP1 Class D audio reference design is available for $500 each. Meanwhile, the IR2011 (in 8-pin DIP) is priced at $1.25 and the IR2011S (in an SO-8 package) at $1.30.

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