PWM conversion circuit, PWM conversion method, and LED dimming system

摘要

Problem to be solved: to provide a PWM conversion circuit, a PWM conversion method and an LED dimming system capable of stably converting a phase control output from a phase control type dimmer to a PWM control output.A phase control output from the phase control type dimming unit 2 is input.The PWM conversion circuit 3 converts the input phase controlled output to a PWM control output;A pulse waveform generator 30 for generating a DC pulse waveform corresponding to the phase control output andThe presence or absence of the pulsed waveformIt has a measurement section counting and counting by a measurement sampling signal over a fixed unit count timeBased on the measurement results of the measurement sectionA control processing means 6 for outputting a PWM control signal of pulse width corresponding to the measurement results andIs provided.Diagram