The IRAUDAMP1 Class D audio amplifier reference design is a complete and robust solution. It features the 200V-rated IR2011S high-speed gate driver IC, which drives a pair of IRFB23N15D HEXFET MOSFETs for each channel in the power stage to provide the amplified audio PWM waveform. The reference design is a complete analogue input, Class D audio power amplifier with dual 500W peak stereo output into four Ohms. The design is based on a self-oscillating PWM modulator for the lowest component count, with protection functions and housekeeping power supplies to simplify use. Performance highlights include a THD+N of 0.008% at 1kHz, 100W, 4Ohms, an efficiency of 93% at 350W, 1kHz, 4Ohms, a wide operating supply voltage range of ±25 to 60V. Protection circuits include over-voltage and over-current protection. DC voltage output protection prevents speaker damage from DC current. The IR2011 200V-rated high- and low-side MOSFET driver IC is designed for 100W-1000W Class D audio amplifier circuits. Housed in an 8-pin DIP or SO-8 package, it is rated for a maximum ambient temperature of 125°C.
