Patent ID: 8829868
Filing Date: 2014-09-09
Classification: H02M

Abstract:
1. A method of operating a first switch mode power converter, the method comprising: sensing an output current of the first switch mode power converter with reference to a ground of a converter circuit of the first switch mode power converter over only a portion of a waveform of the output current; determining a compensation signal that is a direct function of a duty cycle of a portion of the converter circuit of the first switch mode power converter; compensating a sensed current signal that is proportional to the sensed output current at least for any variation in the duty cycle of the portion of the converter circuit of the first switch mode power converter by summing the compensation signal with the sensed current signal; averaging a signal that is at least proportional to a compensated sensed current signal to produce an averaged signal; and controlling the circuit of the first switch mode power converter based at least in part on the averaged signal.