|
IR公司的 IRS2092是集成了PWM調制器和保護的高壓高性能D類音頻放大器，工作頻率高達800kHz，±100 V額定電壓是可提供500W輸出功率，主要用在家庭影院，密你立體聲系統，通用音頻放大器等。本文介紹IRS2092主要特性，方框圖，典型連接圖，典型應用電路圖以及1700W單路D類音頻功率放大器框圖，主要特性，電路圖和材料清單。 The IRS2092 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. IRS2092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 • RoHS compliant IRS2092典型應用： • Home theater systems • Mini component stereo systems • Powered speaker systems • General purpose audio power amplifiers 
圖1。IRS2092方框圖
圖2。IRS2092典型連接圖
圖3。IRS2092典型應用電路圖 1700W單路D類音頻功率放大器 IRAUDAMP9：1.7 kW / 2-Ω Single Channel Class D Audio Power Amplifier Using the IRS2092S and IRFB4227 The IRAUDAMP9 reference design is a single-channel 1.7-kW ( @ 2Ω 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). 1700W單路D類音頻功率放大器主要應用： • Pro-Audio amplifiers • Powered speakers • Active Sub-woofers • P.A. Systems • Car audio amplifiers Musical Instrument amplifier 1700W單路D類音頻功率放大器主要特性： 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
圖4。1700W單路D類音頻功率放大器功能方框圖
圖5。1700W單路D類音頻功率放大器外形圖
圖5。IRS2092S保護電路功能框圖
圖6。1700W單路D類音頻功率放大器測試圖
圖7。1700W單路D類音頻功率放大器電路框圖
圖8。1700W單路D類音頻功率放大器電路圖（1）
圖9。1700W單路D類音頻功率放大器主板輸入/輸出電源連接圖
圖10。1700W單路D類音頻功率放大器主板電路圖（1）
圖9。1700W單路D類音頻功率放大器子板電路圖 IRAUDAMP9主板材料清單：
IRAUDAMP9子板材料清單：
IRAUDAMP9機械零件清單：
詳情請見： http://www.irf.com/product-info/datasheets/data/irs2092.pdf 和 http://www.irf.com/technical-info/refdesigns/iraudamp9.pdf |
