IR 公司的IRS2093是四路高壓高性能D類(lèi)音頻放大器驅動(dòng)器,并集成了PWM調制器和保護功能,和外接的MOSFET和一些元件一起,可以實(shí)現完整的四路D類(lèi)音頻放大器. IRS2093具有可編程的過(guò)流保護,可編程的死區時(shí)間發(fā)生,開(kāi)關(guān)滴答聲降噪電路,欠壓保護以及高噪音免疫度.本文介紹了IRS2093的主要特性,方框圖以及典型應用連接圖和OTA輸入噪音電壓測試電路.
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主要特性小結:


圖1.IRS2093方框圖



圖2.IRS2093典型連接圖


圖3.OTA輸入噪音電壓測試電路