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：
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