In LED lighting, the related device functions and functions are described as follows:
1. Input protection circuit device: chip resistor, varistor, thermistor, thermistor.
2. EMI filter phone devices: DC medium and high voltage capacitors, SMD power inductors, three-terminal EMI filter capacitors.
3. Rectifier circuit: DC medium and high voltage capacitors, diodes, AC ceramic capacitors, line power inductance.
4. DC-DC conversion circuit: voltage stabilizing diode, chip resistor, ultra-low resistance resistor.