Digital power supply for LED illuminating lamp

The invention belongs to the technical field of digital power supplies, and particularly relates to a digital power supply for an LED illuminating lamp. The digital power supply is characterized in that a 220V alternating-current power supply is sequentially connected with an input protection circuit, an EMI filter circuit, a rectification filter circuit, a power factor correction circuit, a powerconversion circuit, an output filter circuit and a direct-current output circuit through lines, the output filter circuit is also connected with a sampling circuit, an ADC module, a control algorithmcontroller, a PWM signal generator, a drive circuit and a power conversion circuit in sequence, and a communication module is in bidirectional interactive connection with the PWM signal generator, the control algorithm controller and the ADC module. According to the invention, the influence of the defects of large heat productivity, low precision and the like of the analog switching power supplyon the LED illuminating lam