IR公司的IRS2052M集成了PWM調制器和保護電路的兩路200V高壓高性能D類(lèi)音頻放大器驅動(dòng)器,和外接MOSFET和外接元件可以組成完整的兩路D類(lèi)音頻放大器,可選擇死區時(shí)間和可編程雙向過(guò)流保護,并集成了時(shí)鐘振蕩器和無(wú)開(kāi)關(guān)聲的起動(dòng)和關(guān)斷.主要用在高性能的家庭影院系統和汽車(chē)音頻放大器.本文介紹了IRS2052M主要特性和指標, 功能方框圖和典型應用框圖.
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主要指標:


圖1.IRS2052M功能方框圖

圖2.IRS2052M典型應用框圖

圖3.IRS2052M OTA輸入噪音電壓測量電路圖

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