Patent ID: 7924584

Claim:
A power supply comprising: a bi-forward converter operable to convert an alternating current (AC) input voltage into an AC output voltage; a controller directly coupled with the bi-forward converter and operable to control a voltage level of the AC output voltage; a feed forward circuit operable to detect a peak AC voltage associated with the AC input voltage, the feed forward circuit including: a voltage divider operable to divide the AC input voltage, and a peak detector operable to detect a peak AC voltage associated with the divided AC input voltage and send the detected peak AC voltage to the controller; and a dimmer and feedback circuit operable to provide a feedback dimming control voltage to the controller, wherein the controller is further operable to adjust the AC output voltage of the bi-forward converter responsive to the peak AC voltage detected by the feed forward circuit and the feedback dimming control voltage provided by the dimmer and feedback circuit such that the AC output voltage remains substantially constant over a range of detected peak voltages including the detected peak AC voltage.