IR IR4301 130W 2路D類音頻功率放大器參考設計

發布時間：2012-5-29 12:51 發布者：1770309616

IR公司的IR4301和R4311集成了PWM控制器和數字音頻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,并具復位功能,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,塢站音頻系統,電子音樂,卡拉OK放大器,游戲控制臺,揚聲器系統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IRAUDAMP12參考設計主要特性,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產品特性:

IR4301和R4311典型應用:

 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IRAUDAMP12參考設計

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) 和

iraudamp12.pdf (611.24 KB)

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