Patent ID: 7525293

Claim:
A power supply comprising: a bridge rectifier operable to rectify an alternating current (AC) voltage and generate an input voltage; a converter to convert an input voltage into an output voltage, the converter including a capacitor and an inductor; a switching circuit operable to alternately switch the input voltage to the converter, the switching circuit comprising a first transistor and a second transistor; a controller operable to adjust a switching frequency of the first transistor and the second transistor to substantially match a resonant frequency of the capacitor and the inductor; a feedback circuit operable to generate a feedback dimming control signal to the controller for reducing the output voltage of the converter; and a current limit circuit operable to send a first error signal to the controller in an event that the power supply exceeds a pre-determined current limit, the controller operable to shut down the converter responsive to the error signal.