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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 (2R/±18V; no heatsink)/ 135W/ch (2R/±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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Class D Audio Power Amplifier




Reference Design Board IR4321


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CAD Models - Notice
CAD Models and drawings are provided to you on a revocable limited licence for your internal use only but remain the property of the manufacturer who retain all intellectual property rights and ownership. They are provided to assist you in decision making and as design guide but are not guaranteed to be error free, accurate or up to date and is not intended to be taken as advice.
Use of these CAD models and other options provided are downloaded and used entirely at your own risk and by continuing you confirm acceptance of the above.

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