Patent ID: 8198873
Filing Date: 2012-06-12
Classification: G05F,H02M,Y02B,Y02P

Abstract:
1. A power converter comprising a converter input, a converter output, a power factor pre-regulation stage, an isolation stage and a control unit, the power factor pre-regulation stage further comprising a buck power factor correction (PFC) circuit implemented using low side drive and low side current sensing and a bulk capacitor, the buck PFC circuit supplying current to the bulk capacitor, wherein the control unit comprises means to measure circuit parameters of the power converter, means to cause the buck PFC circuit to provide additional line current to the bulk capacitor in response to the measured circuit parameters of the power converter, a loop control circuit, and the means to cause the buck PFC circuit to provide additional line current to the bulk capacitor in response to the measured circuit parameters of the power converter comprises increasing the loop gain of the loop control circuit.