FL7701 is an intelligent LED lamp integrated driver with PFC function. It uses digital control algorithm and has internal self-bias voltage circuit and stable UVLO circuit. FL7701 also has an intelligent internal circuit that can automatically change the internal reference voltage to adapt to input voltage conditions. The device also has a soft-start function to reduce the surge current during power-up. In the application circuit, the diode rectifier bridge stage does not use electrolytic capacitors. The system design requirements will generate high pulse waveforms.