? Overview ft2920 yes yes a power up to 7W, with high efficiency, built-in Adaptive BOOST boost circuit without an output filter G class audio power amplifier that integrates automatic volume control (ALC) circuit and the battery voltage tracking circuit that can operate over a wide voltage range of 3.0V ~ 5.5V and 3.6V power supply when, THD + N is 10%, you can output 7.4W of power at 4 ohm speakers, or output mode in the ALC 5.6 W of constant power. ft2920 the BOOST boost circuit switch is an asynchronous PWM boost rectifier circuit, with a current capacity, high work efficiency. ft2920 is a multi-level voltage supply Class G audio amplifier, its output stage supply voltage with the output signal size classification change, when the output signal is relatively small, BOOST boost circuit does not work, the output stage directly from the power supply (VDD ) power supply, when the output signal is large, BOOST boost circuit operates by the output stage supply voltage boosted, BOOST circuit to boost to an intermediate voltage, the output signal is large, it will rise to the highest voltage work doing so can improve the efficiency of the system to extend battery life. ft2920 with automatic volume control (ALC) function, the output signal is too large cause a rapid decline of the chip gain clipping distortion, the distortion control in a relatively small range, which can suppress the amplitude of the output signal of the input signal caused by excessive clipping distortion (less broken sound), and significantly improve the sound quality and create a very comfortable listening experience. ft2920 with a battery voltage tracking function. For BOOST circuit, in the constant output power for voltage drops, the operating current increases, ft2920 combined ALC function, when the battery voltage is too low can automatically reduce the maximum output power to prevent battery discharge current is too large and cause system crashes. ? Features Operating range:? 3.0V ~ 5.5V Class-G amplifier built-BOOST boost circuit without an output filter automatic volume control (ALC) to reduce sound broken battery voltage tracking BOOST circuit has a soft start function???? ? three output voltage options: 6.6V / 7.2V / 7.8V maximum output power (Non-ALC mode) 7.4W (4Ω load) 4.0W (8Ω load) constant output power (ALC mode) 5.6W (4Ω?? ? load) 3.1W (8Ω load) ALC dynamic range of up to 10.5dB 3 种 gain options:?? 26dB / 30dB / 34dB efficiency up to 84% sound fade function undervoltage lockout protection resettable overcurrent /??? Short circuit protection Over temperature protection package:?????? TSSOP-24L applications portable speakers, Bluetooth Speaker Consumer Electronics TV / Monitor