BP5929 is a high-performance stepless color adjustment control chip that can drive two channels of MOSFETs. By adjusting the duty cycle of the input PWM signal, the luminous proportions of two channels of LED light sources are adjusted to achieve the purpose of color adjustment. The output currents of the two channels of LEDs are complementary. During the color adjustment process, the total current remains unchanged and is equal to the current of the constant current source. BP5929 can be compatible with PWM signals with amplitudes of 3.3V/5V. The floating high-voltage side can withstand a voltage of up to 600V with respect to GND and can be widely adapted to various LED constant current drive circuits.