To solve the problem that drive chip does not supporting dimming and to be used for different specifications of LEDs, the design of a single-stage PFC high power LED driver power supply is proposed, and the circuit is improved to support analog dimming. Then the design of the analog dimming circuit is introduced, and the realization principle of constant voltage and constant current is analyzed. The whole driver power supply has good constant current characteristic, high power factor and high efficiency. The experimental results show that the power supply can