Reference Design Produces 25W to 500W Class D Audio Amps

The IRAUDAMP7 reference design for Class D audio amplifiers covers a power range from 25W to 500W, offering a high degree of scalability on a single layer PCB. The two-channel, 120W half-bridge design provides 91% efficiency at 120W into eight Ohms and a THD+N of 0.005% at 1 kHz/60W into eight Ohms. The IRAUDAMP7D employs an IRS2092 protected digital audio driver 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 team with the IRFI4019H-117P digital audio dual MOSFET and are wave-solder compatible. Other shared features include over-current, over-voltage, under-voltage, dc, and over-temperature protection. Functions include a ±5V supply for analog signal processing for the preamplifier and a +12V supply referenced to -B for the Class D gate driver stage. Price for the IRAUDAMP7 reference design is $199 each. INTERNATIONAL RECTIFIER, El Segundo, CA. (310) 252-7726.