IRAUDAMP21

IRAUDAMP21 is a reference design. It is a two-channel, 90W/ch (2ohm/±18V; no heatsink)/ 135W/ch (2ohm/±22V; with heatsink) half-bridge Class D audio power amplifier. This reference design demonstrates how to use the IR4321 IC, implement protection circuits, and design an optimum PCB layout using PowIRaudio integrated Class D IC. This reference design does not require heatsink or fan cooling for normal operation (one-eighth of continuous rated power). The reference design provides all the required housekeeping power supplies for ease of use. The two-channel design is scalable for power and the number of channels. Typical applications include AV receivers, home theatre systems, mini component stereos, powered speakers, sub-woofers, musical instrument amplifiers and car audio amplifiers.

• 90W x 2 ch (10%THD+N 2ohm load; no heatsink), 135W x 2 ch (10%THD+N 2ohm load; with heatsink)
• Over-current protection (OCP), high side and low side over-voltage protection (OVP)
• Under-voltage protection (UVP)
• high side and low side DC protection (DCP)
• Over-temperature protection (OTP)
• Self-oscillating half-bridge topology with optional clock synchronization
• Supply voltages of ±12 to ±18V without heatsink, ±12 to ±22V with heatsink
• 400KHz self-oscillating frequency at no input signal, adjustable
• 26dB gain setting at 1Vrms input yields rated power
• ±70mA idling supply current and 2.4W total idle power consumption at no input signal

Warnings

Market demand for this product has caused an extension in leadtimes. Delivery dates may fluctuate. Product exempt from discounts.