IR 公司的IRS2053M集成了三路高壓高性能D類音頻功率放大器驅(qū)動器和PWM調(diào)制器和保護電路.和外接MOSFET以及元件一起,可以實現(xiàn)完整的3路D類音頻功率放大器.本文介紹了IRS2053M 主要特性, 功能方框圖, 典型連接框圖, OTA輸入噪音電壓測試電路圖以及采用IRS2053M 和IRF6665的120Wx3路D類音頻功率放大器參考設(shè)計IRAUDAMP11主要特性, D類功率放大器方框圖和系統(tǒng)級IRAUDAMP11方框圖,電路圖以及所用電材料清單和機械材料清單.
The IRS2053 integrates three channels of high voltage, high performance Class D audio amplifier drivers with PWM modulators and protections. In conjunction with external MOSFET and external components, a complete 3 channel Class D audio amplifier can be realized. The IRS2053 is designed with floating analog inputs and protection control interface pin especially for half bridge topology. High and low side MOSFET are protected from over current conditions by a programmable bi-directional current sensing. Essential elements of PWM modulator section allow flexible system design. A small MLPQ48 package enhances the benefit of smaller size of Class D topology.
The IRS2053M digital audio driver is a three channel Class D audio driver housed in a 48 pin MLPQ. The IRS2053M features clipping detection outputs, DC offset detection input, over temperature sensor inputs and a fault reporting output.
IRS2053M 主要特性:
• 3 channel integrated analog input Class D audio amplifier drivers
• Versatile protection control enabling latched, nonlatched, or host controlled shutdown function
• DC offset detection input
• Clipping detection
• Thermal sensor inputs
• Fault output
• Programmable over current protection
• Programmable dead-time generation
• Startup click noise reduction
• Under voltage protection
• High noise immunity
圖1. IRS2053M 功能方框圖
圖2. IRS2053M 典型連接框圖
圖3. IRS2053M OTA輸入噪音電壓測試電路圖
采用IRS2053M 和IRF6665的120Wx3路D類音頻功率放大器參考設(shè)計
120W x 3 Channel Class D Audio Power Amplifier Using the IRS2053M and IRF6665
圖4.120Wx3路D類音頻功率放大器IRAUDAMP11外形圖
The IRAUDAMP11 Demo board is a reference design which uses only one IC (IRS2053M) to derive appropriate input signals, amplify the audio input, and achieve a three-channel 120 W/ch (4Ω, THD+N=1%) half-bridge Class D audio power amplifier. The reference design demonstrates how to use the IRS2053M Class D audio controller and gate driver IC, implement protection circuits, and design an optimum PCB layout using IRF6665 DirectFET MOSFETs. The reference design contains all the required housekeeping power supplies for ease of use. The three-channel design is scalable, for power and number of channels.
IRAUDAMP11主要特性:
Output Power: 120W x 3 channels (4Ω, THD+N=1%) or 170W x 3 channels (4Ω, THD+N=10%)
Residual Noise: 220V, IHF-A weighted, AES-17 filter
Distortion: 0.02% THD+N @ 60W, 4Ω
Efficiency: 90% @ 120W, 4Ω, single-channel driven, Class D stage
Multiple Protection Features: Over-current protection (OCP), high side and low side
Over-voltage protection (OVP),
Under-voltage protection (UVP), high side and low side
Over-temperature protection (OTP)
PWM Modulator: Self-oscillating half-bridge topology with optional clock synchronization
IRAUDAMP11指標(biāo):
IRAUDAMP11應(yīng)用:
AV receivers
Home theater systems
Mini component stereos
Powered speakers
Sub-woofers
Musical Instrument amplifiers
Automotive after market amplifiers
圖5.簡化IRAUDAMP11 D類功率放大器方框圖
圖6.系統(tǒng)級IRAUDAMP11方框圖
圖7.IRAUDAMP11 D類功率放大器電路圖
IRAUDAMP11電材料清單(BOM):
IRAUDAMP11機械材料清單(BOM):
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