原创 IR IRS2093四路高压D类音频放大方案

 2009-9-23 08:26  2165 6 6 分类: 消费电子


作者：时间：2009-05-06 来源:

IR 公司的IRS2093是四路高压高性能D类音频放大器驱动器,并集成了PWM调制器和保护功能,和外接的MOSFET和一些元件一起,可以实现完整的四路D类音频放大器. IRS2093具有可编程的过流保护,可编程的死区时间发生,开关滴答声降噪电路,欠压保护以及高噪音免疫度.本文介绍了IRS2093的主要特性,方框图以及典型应用连接图和OTA输入噪音电压测试电路. The IRS2093 integrates four 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 4 channel Class D audio amplifier can be realized. The IRS2093 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. IRS2093主要特性: 4 channel integrated analog input Class D audio amplifier drivers in a 48 pin MLPQ package Programmable over current protection Programmable dead-time generation Versatile protection control enabling latched, non-latched, or host controlled shutdown function Versatile input structure for self-oscillating PWM, external clock synchronization, or natural carrier based PWM modulations Start and stop click noise reduction Under voltage protection High noise immunity IRS2093主要特性小结: 图1.IRS2093方框图图2.IRS2093典型连接图图3.OTA输入噪音电压测试电路