NS4225 is a filter-free, 25W per channel, D-class stereo audio power amplifier. It adopts advanced techniques to greatly reduce EMI interference across the entire bandwidth, minimizing the impact on other components. Its output filter-free PWM modulation structure reduces external components, PCB area and system cost. When working in the PBTL mode, NS4225 is a single-channel audio amplifier. At this time, the output drive capability is stronger, and the power amplifier efficiency is higher. NS4225 has built-in overcurrent protection, overtemperature protection and undervoltage protection functions, which effectively protect the chip from damage under abnormal working conditions. NS4225 is available in a TSSOP-24 package and has an operating temperature range of -40 to 85°C.