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IR公司的IR4301和R4311集成了PWM控制器和數(shù)字音頻MOSFET,組成了高性能D類音頻放大器,具有高峰值音樂功率輸出,不需要機(jī)械的散熱器,單電源或雙電源工作,差分或單端輸入,過流,超溫和欠壓保護(hù),并具復(fù)位功能,IR4301能向4歐姆輸出160W功率,IR4311能向4歐姆輸出35W功率,主要用在家庭影院系統(tǒng),塢站音頻系統(tǒng),電子音樂,卡拉OK放大器,游戲控制臺,揚(yáng)聲器系統(tǒng)和通用音頻功率放大器.本文介紹了IR4301和IR4311主要特性,方框圖,多種連接電路和應(yīng)用電路,以及采用IR4301的130W/4Ω x 2路D類音頻功率放大器IRAUDAMP12參考設(shè)計(jì)主要特性,電路圖,材料清單和PCB布局圖. The IR4301, IR4311 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 IR4301, IR4311 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 5x6 mm MLPQ package enhances the benefit of smaller size of Class D topology. The IR4301, IR4311 are a lead-free, ROHS compliant. IR4301和IR4311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 Start and stop click noise reduction High noise immunity RoHS compliant IR4301和IR4311產(chǎn)品特性: 
IR4301和R4311典型應(yīng)用: Home theatre systems Docking station audio systems PC audio systems Musical instruments Karaoke amplifiers Game consoles Powered speaker systems General purpose audio power amplifier
圖1.IR4301和IR4311方框圖
圖2.IR4301和IR4311反相放大器連接圖
圖3.IR4301和IR4311差分放大器連接圖
圖4.IR4301和IR4311單電源連接圖 采用IR4301的130W/4Ω x 2路D類音頻功率放大器IRAUDAMP12參考設(shè)計(jì) The IRAUDAMP12 reference design is a two-channel, 130W/ch (4Ω/±31V; no heatsink)/ 160W/ch (4Ω/±34V; *with heatsink) half-bridge Class D audio power amplifier. This reference design demonstrates how to use the IR4301 IC, implement protection circuits, and design an optimum PCB layout using PowIRaudio integrated Class D IC. This reference design does not require heatsink or fan cooling for normal operation (one-eighth of continuous rated power).The reference design provides all the required housekeeping power supplies for ease of use. The two-channel design is scalable for power and the number of channels.
圖5.130W 2路D類音頻功率放大器IRAUDAMP12外形圖 D類音頻功率放大器IRAUDAMP12主要特性:
D類音頻功率放大器IRAUDAMP12應(yīng)用: AV receivers Home theater systems Mini component stereos Powered speakers Sub-woofers Musical Instrument amplifiers Car audio amplifiers
圖6. D類音頻功率放大器子板電路圖
圖7. D類音頻功率放大器主板電路圖
圖8. D類音頻功率放大器主板時(shí)鐘和管理電路圖 IRAUDAMP12 子板材料清單:
IRAUDAMP12 主板材料清單:
圖9.IRAUDAMP12子板PCB布局圖:頂層
圖10.IRAUDAMP12子板PCB布局圖:底層
圖11.IRAUDAMP12主板PCB布局圖:頂層
圖12.IRAUDAMP12主板PCB布局圖:底層 詳情請見: 
ir4301.pdf
(455.97 KB)
iraudamp12.pdf
(611.24 KB)
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