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IR Introduces 25W to 500W Scalable Output Power Class D Audio Power Amplifier Reference Design
19 September 2008
 EL SEGUNDO, Calif. - 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 IR's 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, IR's 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.
Specifications
Datasheets and application notes are available on the International Rectifier website at www.irf.com.
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. IR's analog- and mixed-signal ICs, advanced circuit devices, integrated power systems, and components enable high-performance computing and reduce energy waste from motors, the world's single largest consumer of electricity. Leading manufacturers of computers, energy-efficient appliances, lighting, automobiles, satellites, aircraft, and defense systems rely on IR's power-management benchmarks to power their next generation products.
Founded in 1947, IR operates from headquarters in Los Angeles with operations in 20 countries. IR's corporate web site is www.irf.com, Asia web site is www.irf-asia.com, and China web site is www.irf.com.cn.
Trademark Notice
IR® is a registered trademark of International Rectifier Corporation. All other product names noted herein may be trademarks of their respective holders.
For more information, contact Winnie Wong,wwong1@irf.com
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