Patent ID: 9648674
Date: 2017-05-09
CPC Classifications: G01R,H02M,H05B

Claim:
1. A method of calculating an average output current from a signal related to input current comprising: obtaining a first voltage related to an average value of the input current; dividing the first voltage by a signal related to a duty cycle of a power converter utilizing an analog division circuit comprising an operational amplifier having a feedback loop including a capacitor; operating a switch to couple output of the operational amplifier to input thereof through a capacitor; operating a first switch coupled between the output of the operational amplifier and a first node and being controlled by a pulse width modulation (PWM) signal; operating a second switch coupled between the node and a reference voltage and being controlled by the pulse width modulation (PWM) signal representing a duty cycle of a rectifier; and obtaining a signal related to the average value of the output current at output of the divider.