Patent ID: 9653991
Date: 2017-05-16
CPC Classifications: H02M,H05B,Y02B

Claim:
1. A power converter comprising: an inductor; a switch turned on or turned off according to a control signal to control a current flowing through the inductor; and a control unit outputting the control signal to turn on or turn off the switch by integrating a current flowing through the switch to compare the integrated current with a pre-set reference voltage, wherein the control unit comprises a first signal generator outputting a first signal corresponding to the control signal for turning on the switch and a second signal generator outputting a second signal corresponding to the control signal for turning off the switch, the second signal generator comprises an integrator and integrates the current flowing through the switch, the integrator integrates the current flowing through the switch by averaging an amount of the current flowing in a first period and a second period which are different from each other, each of the first period and the second period is divided into a first sub-period in which a current smaller than a reference current flows and a second sub-period in which a current greater than the reference current flows, and the integrator outputs an average value by averaging the amount of the current flowing through the switch using a measured voltage corresponding to the current flowing through the switch in the first sub-period of the first period and the current flowing through the switch in the second sub-period of the second period.