Patent ID: 9543836
Date: 2017-01-10
CPC Classifications: G01R,H02M,Y02B

Claim:
1. A control device of a power converter circuit which has an inductor and a switch or switches and repeats accumulation of energy to an inductor at each turn on timing of the switch or switches and release of the energy from the inductor to output an output voltage at each turn off timing of the switch or switches, comprising: an on-time information generation circuit which receives a power converter circuit information including at least the output voltage from the power converter circuit, and generates an on-time information of the switch or switches as a numerical number; a zero cross detecting circuit which detects a time when a current flowing through the inductor becomes zero by inputting a voltage between both terminals of the inductor, and generates a zero cross detection signal when the current becomes zero; and a PWM signal generation circuit which receives the on-time information and the zero cross detection signal, and generates a turn on signal and a turn off signal, the PWM signal generation circuit generates the turn on signal when the zero cross detecting signal is received, and generates the turn off signal when a time based on the on-time information is passed, wherein the edge detecting circuit comprises a constant voltage circuit and a flip-flop circuit.