IR IR4302 100Wx2路D类音频功率放大器解方案

IR公司的IR4302和IR4312集成了两路PWM控制器和数字音频MOSFET,组成高性能D类音频放器,其输出功率为100Wx2路(10%THD+N 4Ω 负载,带散热器),60Wx2路(10%THD+N 4Ω ,不带散热器),具有多种保护功能如过流保护(OCP),过压保护(OVP),欠压保护(UVP)和超温保护(OTP),主要用于家庭影院,PC音频系统,卡拉OK放大器,游戏控制器,扬声器系统和通用音频功率放大器.本文介绍了IR4302主要特性,功能方框图,典型应用电路以及采用IR4302的100W / 4欧姆x 2路D类音频功率放大器主要特性,电路图,材料清单和PCB布局图.

The IR4302, IR4312 integrates 2 channel PWM controller and digital audio MOSFETs forming a high performance Class D audio amplifier. As a result of fully optimized MOSFETs co-packed with a dedicated controller IC, the IR4302, IR4312 operates without mechanical heatsink attached in a typical music playback usage. High voltage ratings and noise immunity in the controller IC ensures reliable operation over various environmental conditions. A small 7x7 mm PQFN package enhances the benefit of smaller size of Class D topology. The IR4302, IR4312 are a lead-free, ROHS compliant.

IR4302主要特性:

 2 channel integrated analog input Class D audio amplifier in a small 7 x 7 mm PQFN44 package

 No mechanical heatsink required

 High peak music power output

 Split or single power supply
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