Product category:
Reference Designs
News Release from: International Rectifier | Subject: IRAUDAMP3 Class D audio reference design
Edited by the Electronicstalk Editorial
Team on 19 July 2006
Class D audio power amplifier needs no
heatsink
Compact reference design combines high-voltage analogue IC and power MOSFETs to complete a six-channel 120W half-bridge Class D audio power amplifier with no heatsink.
International Rectifier has introduced the IRAUDAMP3 Class D audio reference design The new, compact reference design features the IRS20124S high-voltage analogue IC and IRF6645 DirectFET power MOSFETs to complete a six-channel 120W half-bridge Class D audio power amplifier with no heatsink
This article was originally published on Electronicstalk on 15 Feb 2001 at 8.00am (UK)
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The IRS20124S high-voltage IC incorporated in this reference design features an internal selectable dead-time generation circuit and is immune to noise and supply voltage fluctuations to help achieve a total harmonic distortion (THD) of 0.01% at 60W, 4ohm and 94% efficiency at 120W, 4ohm single channel.
Additionally, the IC has built-in bidirectional current sensing and an integrated shutdown function to protect the output MOSFETs when an over-current condition occurs such as a short-circuited speaker wire.
The IRAUDAMP3, which has a footprint of 29.03cm2 for each two channel control and switch function, also utilises IRF6645 DirectFET power MOSFETs.
The innovative DirectFET packaging technology enhances performance in Class D audio amplifier circuits by reducing lead inductance to improve switching performance and reduce EMI noise.
The higher thermal efficiency enables 120W operation into 4ohm, eliminating the need for a heatsink to shrink circuit size, provide greater layout flexibility and reduce overall amplifier system cost.
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