</a>放大器" title="放大器">放大器" title="放大器">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:
http://www.irf.com/product-info/datasheets/data/auirs2092s.pdf
和
http://www.irf.com/technical-info/refdesigns/iraudamp9.pdf