Thai ft2820 is a party with AGC (ALC) function, based on the dual charge pump boost patented technology (Dual-PumpTM), power up to 4W of Class-G audio amplifier, ft2820 can voltage 3.0V ~ 5.5V When working, the power supply voltage 4.2V, THD + N of less than 10%, can be sustained up to 4W of output power at 4Ω speakers. ft2820 efficiency of up to 82%, can help extend battery life in portable devices. ft2820 internal adaptive boost circuit, the output power is relatively small, ft2820 power output stage powered by a CVDD, when the output power is large, through a dual charge pump boost rectifier technology, ft2820 power output stage circuit in On 6V voltage, greatly increase the output voltage swing, traditional single lithium battery-powered devices can also be a greater voice, therefore, ft2820 more suitable on a single lithium battery-powered portable products and the need for more power output. ft2820 with AGC (ALC) function, you can suppress the output signal clipping distortion (anti-breaking sound) due to the input of the music, the voice signal amplitude is too large due to be adaptively prevent the battery voltage battery applications output decline caused by clipping, dramatically improves sound quality, create a very comfortable listening experience.