IR R4301 90Wx2 D类音频放大器参考设计

IR公司的IR4301集成了PWM控制器和数字音频MOSFET,组成了高性能的D类音频放大器,具有高峰值音乐输出功率和不需要机械散热器,可采用单电源或双电源,差分或单端输入,过流,超温和欠压保护与自重起功能,主要用在家庭影院,PC音频系统,卡拉OK放大器,游戏控制台,扬声器,音乐设备以及通用音频功率放大器.本文介绍了IR43x1主要特性, 功能方框图,反相和差分放大器应用电路,以及IRAUDAMP21 90Wx2 D类音频放大器参考设计主要指标,电路图,材料清单和PCB元件布局图.

The IR43x1 integrates 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 IR43X1operates 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 5x6 mm PQFN package enhances the benefit of smaller size of Class D topology. The IR43x1 are a lead-free, ROHS compliant.

IR43x1主要特性:

 Integrated analog input Class D audio amplifier in a small 5 x 6 mm PQFN package
 High peak music power output
 No mechanical heatsink required
 Split or single power supply
 Differential or single-ended input
 Over-current, over-temperature and under voltage protections with self-reset function ..

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