A Home Isolated Flyback LED Lamp Driver Circuit Design Supporting Radar Sensor Control Dimming

This paper designs an isolated flyback light emitting diode (LED) lamp driver circuit that uses an integrated chip as the driver with high power factor and constant current characteristics to provide accurate constant current control, the chip operates in critical conduction mode (CRCM) with high efficiency . The circuit design uses the primary control mode, which eliminates the need for optocouplers, secondary feedback control and loop compensation, thus simplifying the design and reducing costs. In addition, the circuit designed in this paper has LED short-circuit protection, open-circuit protection, over-temperature protection, supports radar sensor pulse width modulation (PWM) and linear dimming, and can be widely used in household LED lamps.