Patent ID: 9166483
Filing Date: 2015-10-20
Classification: H02M,H05B,Y02B

Abstract:
1. A single stage AC-DC power converter for powering a load, comprising: a buck power factor correction (PFC) circuit having a PFC controller, the buck PFC circuit configured to: draw an alternating current (AC) input current having a first total harmonic distortion (THD), sense a rectified input voltage from a full-wave rectifier via the PFC controller, output a direct current (DC) voltage and a DC current and supply constant current to the load; and a passive voltage multiplier circuit disposed between the full-wave rectifier and a sensed voltage input pin of the PFC controller, and configured to multiply the rectified input voltage to be sensed by the PFC controller, thereby causing the input AC current drawn by the buck PFC circuit to have a second THD lower than the first THD.