NS4216 is a differential input, ultra-low EMI, filterless, 20W (10W×2) dual-channel D-class audio power amplifier. The chip has two control ends to control the left and right channels of the chip, and the chip's working mode can be controlled by high and low levels: when the LCTRL/RCTRL pin voltage is high, the chip's L/R channel enters the working mode, and the chip is turned off at low voltage, which is flexible and convenient to use. NS4216 adopts advanced technology to greatly reduce EMI interference in the full bandwidth range, and minimizes the impact on other external components. Its output filterless PWM modulation structure reduces external components, PCB area and system cost. NS4216 can provide up to 20W (10W×2) output power to 4Ω load at 9V working voltage, and its efficiency of over 90% is more suitable for portable audio systems. NS4216 has built-in overcurrent protection, overheating protection and undervoltage protection functions to effectively protect the chip from damage under abnormal working conditions. NS4216 provides eTSSOP-24 package, with a rated working temperature range of -40℃ to 85℃.