原标题：IR IRS2052M两路立体声高压D类音频放大方案

　　IR公司的IRS2052M集成了PWM调制器和保护电路的两路200V高压高性能D类音频放大器驱动器,和外接MOSFET和外接元件可以组成完整的两路D类音频放大器,可选择死区时间和可编程双向过流保护,并集成了时钟振荡器和无开关声的起动和关断.主要用在高性能的家庭影院系统和汽车音频放大器.本文介绍了IRS2052M主要特性和指标, 功能方框图和典型应用框图.

　　The IRS2052M integrates two 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 2 channel Class D audio amplifier can be realized. The IRS2052M 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 IRS2052M is a lead-free, ROHS compliant.

　　IRS2052M主要特性:

　　• 2 channel integrated analog input Class D audio amplifier driver

　　• Versatile protection control enabling latched, non-latched, or host controlled shutdown function

　　• Integrated clock oscillator

　　• Clipping detection

　　• External thermal sensor input

　　• On-chip thermal shutdown with warning

　　• Programmable over current protection

　　• Programmable dead-time generation

　　• Start and stop click noise reduction

　　• Under voltage protection

　　• High noise immunity

　　IRS2052M主要指标:

　　图1.IRS2052M功能方框图

　　图2.IRS2052M典型应用框图

　　图3.IRS2052M OTA输入噪音电压测量电路图