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IR rolls Class D audio power amplifier reference design

Posted: 23 Sep 2008 ?? ?Print Version ?Bookmark and Share

Keywords:power amplifier? audio Class D? reference design?

From International Rectifier Corp. (IR) comes 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, 8?, and a THD+N of 0.005 percent at 1kHz, 60W, 8? (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 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.

The IRAUDAMP7 reference design is available immediately.





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