IRAUDAMP4A: Stereo 120W @ 4Ω, ±25 ~ 35V in

Summary

The IRAUDAMP4A reference design is an example of a two-channel 120 W half-bridge Class D audio power amplifier. The reference design will demonstrate how to use the IRS20957, implement protection circuits, and design an optimum PCB layout using the IRF6645 DirectFET MOSFETs.

The resulting design requires no heatsink for normal operation (one-eighth of continuous rated power). The reference design contains all the required housekeeping power supplies for ease of use. The two-channel design is scalable, for power and the number of channels.

(Infineon Technologies bought International Rectifier)

Specifications

Manufacturer	Infineon Technologies
Category	Audio Amplifiers
Eval Board Part Number	IRAUDAMP4A-ND
Eval Board Supplier	Infineon Technologies
Eval Board	Board not Stocked
Amplifier Type	Class D
Number of Outputs	Stereo
Output Power (RMS) @ Load	120 W x 2 @ 4 Ω
Voltage In	±25 ~ 35 V
THD+N (1kHz) @ Conditions	< 0.004% @ 60 W (4 Ω, ±35 V)
Features	Over Current Protection Over Voltage Protection Thermal Protection Under Voltage Protection, Brown-Out
Efficiency @ Conditions	>95%, ±35V in, 4 Ω @ 120 W >80%, ±35V in, 4 Ω @ 10 ~ 170 W
Standby Current [Typical]	100 µA
Quiescent Current [Typical]	100 mA
Component Count + Extras	293 + 29
Application / Target Market	Audio: Hi Fi Audio: Home Theater Systems Audio: Powered Speakers Portable Devices
Design Author	Infineon Technologies
Main I.C. Base Part	IRF6645 IRS20957
Quiescent Current [Maximum]	- Not Given
Standby Current [Maximum]	- Not Given
Date Created By Author	2009-12
Date Added To Library	2017-05