iraudamp3| Application Note
IRAUDAMP3
120W x 6 Channel Class D Audio Power Amplifier using IRS20124S and IRF6645
By Jun Honda, Johan Strydom and Jorge Cerezo
Table of Contents
Page Introduction .......................................................................................... 1 Specifications ....................................................................................... 2 Functional Description.......................................................................... 4 Protection .............................................................................................11 Typical Performance ............................................................................15 Design Documents ..............................................................................20
The IRAUDAMP3 reference design is an example of a complete six-channel 120W half-bridge Class D audio power amplifier. The reference design is intended to demonstrate how to use the IRS20124S, implement protection circuits, and design an optimum PCB layout using IRF6645 DirectFET MOSFETs. The modular design consists of a motherboard with three identical daughter boards. The resulting design requires no heat-sinking for normal operation. The reference design includes all the required housekeeping power supplies for ease of use.
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