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Development Board, IR4321 Class-D Audio Amplifier Reference Design, 2-Channel, 90W


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Product Overview

IRAUDAMP21 reference design is a two-channel, 90W/ch (2Ω/±18V; no heatsink)/ 135W/ch (2Ω/±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.
  • OCP, high side and low side OVP, UVP, high side and low side DC-protection (DCP), OTP
  • Self-oscillating half-bridge topology with optional clock synchronization


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