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IR公司的IRAUDAMP9是采用IRS2092S和IRFB4227的單路1.7 kW / 2-Ω 數字D類音頻功率放大參考設計,輸出功率1.7kW(2 Ω 負載, 1kHz, THD+N=10%),THD+N失真0.07%(@ 600W, 2Ω),效率97%(@ 1.7 kW, 2Ω),具有多種輸出保護特性如OCP,OVP,UVP,DCP和OTP,主要用于專業音響放大器,揚聲器,有源亞低音,功率放大器,汽車音頻放大器和樂器放大器.本文介紹了AUIRS2092主要特性,方框圖,典型應用電路,以及D類音頻功率放大器參考設計IRAUDAMP9功能框圖,主板和子板電路圖以及材料清單,PCB布局圖. The AUIRS2092 is a high voltage, high performance Class D audio amplifier driver with PWM modulator and protection. In conjunction with two external MOSFET and a few external components, a complete Class D audio amplifier with protection can be realized. International Rectifier’s proprietary noise isolation technology allows high current gate drive stage and high speed low noise error amplifier reside on a single small silicon die.Open elements of PWM modulator section allow flexible PWM topology implementation. AUIRS2092主要特性: • Integrated analog input Class D audio amplifier driver in a small 16 pin package • Floating inputs enable easy half bridge implementation • Programmable bidirectional over-current protection with self-reset function • Programmable preset deadtime for improved THD performances • Start and stop click noise reduction • High noise immunity • ±100 V ratings deliver up to 500 W in output power • Operates up to 800 kHz • Leadfree, RoHS compliant • Automotive Qualified† AUIRS2092典型應用: • Automotive mini component stereo systems • Automotive powered speaker systems • Automotive audio power amplifiers 
圖1.AUIRS2092方框圖
圖2.AUIRS2092典型連接電路圖
圖2.AUIRS2092 OTA輸入噪音電壓測量電路圖 采用IRS2092S和IRFB4227的1.7 kW / 2-Ω單路D類音頻功率放大器參考設計IRAUDAMP9 The IRAUDAMP9 reference design is a single-channel 1.7-kW ( @ 2?load) half-bridge Class D audio power amplifier. This reference design demonstrates how to use the IRS2092S Class D audio controller and external gate buffer, to implement protection circuits, and design an optimum PCB layout using the IRFB4227 (x 2 Pairs) TO-220 MOSFETs. This reference design may require additional heatsink or fan for normal operation (one-eighth of continuous rated power). The reference design provides all the required housekeeping power supplies for ease of use. The 1-channel design is capable of delivering higher than its rated power with provision of larger heat sink ( Rth <2?C / W). 參考設計主要特性: Output Power: 1.7 kW Single channel (2 Ω load, 1kHz, THD+N=10%), Residual Noise: 290μV, IHF-A weighted, AES-17 filter Distortion: 0.07% THD+N @ 600W, 2Ω Efficiency: 97% @ 1.7 kW, 2Ω Multiple Protection Features: Output Over-current protection (OCP), high side and low side Input Over-voltage protection (OVP), Input Under-voltage protection (UVP), Output DC-offset protection (DCP), Over-temperature protection (OTP) PWM Modulator: Self-oscillating half-bridge topology with optional clock synchronization 參考設計應用: Pro-Audio amplifiers Powered speakers Active Sub-woofers P.A. Systems Car audio amplifier Musical Instrument Amplifier
圖3.1.7kW音頻功率放大器參考設計外形圖
圖4.1.7kW音頻功率放大器參考設計功能框圖
圖5.1.7kW音頻功率放大器參考設計保護電路功能框圖
圖6.1.7kW音頻功率放大器參考設計主板電路圖
圖7.1.7kW音頻功率放大器參考設計主板輸入/輸出保護電路圖
圖8.1.7kW音頻功率放大器參考設計主板電路圖:Vaa,Vss和Vcc電源DC/DC轉換器
圖9.IRAUDAMP9子板電路圖 IRAUDAMP9主板材料清單(BOM):
IRAUDAMP9子板材料清單(BOM):
IRAUDAMP9機械材料清單:
圖10.IRAUDAMP9主板PCB布局圖(頂層)
圖11.IRAUDAMP9主板PCB布局圖(底層)
圖12.IRAUDAMP9子板PCB布局圖(頂層)
圖13.IRAUDAMP9子板PCB布局圖(底層) 詳情請見: 
auirs2092s.pdf
(320.19 KB)
和
iraudamp9.pdf
(4.33 MB)
來源：網絡 |
