ft2830_1X4.5W_电荷泵自适应升压6.3V_音质纯净

   The ft2830 is a highly efficient 4.5W Class-G audio power amplifier with automatic level control (ALC) for use in battery-powered portable devices. It integrates a filterless Class-D audio power amplifier with a Class-G charge pump regulator based upon proprietary Dual-PumpTM topology. It operates from 3.2V to 4.6V supply. When operating with a 4.2V supply voltage, the ft2830 can deliver into a 4Ω load a maximum output power up to 4.5W with 10% THD+N, or a constant output power at 3.5W with 0.5% THD+N. Its high efficiency, up to 83%, helps extend battery life. 
   
  In ft2830, the power supply rail for the amplifier’s output stage is internally boosted and regulated at 6.2V by an adaptive charge pump regulator based upon the Dual-PumpTM topology, allowing for a much louder audio output than a stand-alone one directly connected to the battery. It makes ft2830 an ideal audio solution for portable devices that are powered by a single-cell lithium battery while requiring higher audio loudness. For applications where minimum EMI emission is required, the charge pump regulator can be disabled.   

   The ft2830 features ALC to constantly monitor and safeguard the audio outputs against the boosted supply voltage, preventing output clipping distortion, excessive power dissipation, or hazardous speaker over-load. Once an over-level condition is detected, the ALC lowers the voltage gain of the audio amplifier proportionally to eliminate output clipping distortion while maintaining a maximum dynamic range of the audio outputs allowed by the boosted supply voltage.