Patent ID: 9030178
Filing Date: 2015-05-12
Classification: H02M

Abstract:
1. A current control circuit for a power converter, comprising: a converter including at least one inductor and at least one switch and configured to receive an input voltage and generate a output voltage to a capacitance; a voltage divider circuit electrically connected to the capacitance and generating a feedback voltage in accordance with the output voltage of the converter; a current sampling circuit electrically connected to the converter and configured to generate a current detecting signal in accordance with the inductor current of the inductor of the converter; a first gain circuit configured to multiply the current detecting signal by a first gain adjusting parameter to generate a first signal; a differential amplifier including one end receiving a reference voltage and the other end electrically connected to the feedback voltage and output an error signal by comparing the reference voltage and the feedback voltage; a second gain circuit configured to multiply the error signal by a second gain adjusting parameter to generate a second signal; an adder weighting the first signal, the second signal and the feedback voltage to generate a third signal; a saw tooth wave generator configured to provide a ramp signal; a modulation comparator comparing the third signal and the ramp signal to generate a driving signal; and a driver including one end receiving the driving signal and the other end electrical connected to the switch within the converter and configured to generate a duty cycle ratio to control the switch.