IR Introduces 25W to 500W Scalable Output Power Class D Audio Power Amplifier Reference Design

EL SEGUNDO, Calif.—(BUSINESS WIRE)—September 18, 2008— International Rectifier, IR® (NYSE: IRF), a world leader in power management technology, today introduced the IRAUDAMP7 reference design for Class D audio amplifiers above 25W per channel including home theater applications, musical instruments and car entertainment. With a power range from 25W to 500W, the IRAUDAMP7 offers a high degree of scalability on a single layer PCB.

The IRAUDAMP7S two-channel, 120W half-bridge design provides 91 percent efficiency at 120W in Class D stage, eight ohms, and a THD+N of 0.005 percent at 1 kHz, 60W, eight ohms, (both typical). The IRAUDAMP7D features IRs IRS2092 protected digital audio driver IC in a DIP16 package together with through-hole components while the IRAUDAMP7S features the IRS2092S in an SOIC package with surface-mount components. Both reference designs are paired with the IRFI4019H-117P digital audio dual MOSFET to further enhance scalability, and are wave solder process compatible.

The IRAUDAMP7 provides designers with quick and easy scalability. For example, a 125W design can be functionally scaled to 60W within minutes simply by changing seven of the 50 components required on a single layer board, said Jun Honda, IRs systems engineering manager, Energy Saving Products.

The IRAUDAMP7 incorporates critical protection features including over-current protection, over-voltage protection, under-voltage protection, DC-protection, and over-temperature protection. Housekeeping functions include a +/- 5V supply for analog signal processing for the preamplifier and a +12V supply (Vcc) referenced to -B for the Class D gate driver stage.

More information is available at the International Rectifier website at

Availability and Pricing:

The IRAUDAMP7 reference design is available immediately. Pricing is US $199 each and is subject to change.

About International Rectifier

International Rectifier (NYSE:IRF) is a world leader in power management technology. IRs analog- and mixed-signal ICs, advanced circuit devices, integrated power systems, and components enable high-performance computing and reduce energy waste from motors, the worlds single largest consumer of electricity. Leading manufacturers of computers, energy-efficient appliances, lighting, automobiles, satellites, aircraft, and defense systems rely on IRs power-management benchmarks to power their next generation products. For more information, go to

Trademark Notice

IR® is a registered trademark of International Rectifier Corporation. All other product names noted herein may be trademarks of their respective holders.


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