Driving circuit of light emitting diode and lighting apparatus

A lighting apparatus, adapted to receive an AC power for lighting, the lighting apparatus comprising:

• an LED;
• and
• a driving circuit, coupled to the LED, and the driving circuit comprising:
• a rectifier unit, rectifying the AC power to generate a first operating voltage;
• a voltage-dividing circuit, coupled to the rectifier unit for receiving the first operating voltage to generate a voltage-dividing signal corresponding to the first operating voltage;
• a control unit, comprising a regulating unit and a PWM unit, wherein an output terminal of the regulating unit is coupled to the PWM unit, and the PWM unit outputs a PWM signal;
• a voltage converter, coupled between the control unit and the LED for driving the LED, and adjusting a driving voltage and a driving current of the LED according to the PWM signal;
• a resistor, coupled between an output terminal of the rectifier unit and a diode, and another terminal of the diode being coupled to a power input terminal of the regulating unit;
• and
• a first capacitor, coupled between the power input terminal of the regulating unit and a ground terminal,
• wherein the PWM unit adjusts the PWM signal according to the voltage-dividing signal and a feedback signal output by the voltage converter.