Patent ID: 6686702
Filing Date: 2004-02-03
Classification: H05B

Abstract:
A transformerless high power xenon power supply comprising:a first DC power supply having: a rectifier, said rectifier having a first input for receiving AC power; a first output; and a first capacitor for filtering the voltage at said first output; at least a first current path comprising: a second input for receiving power from said first output; an inductor; a controllable switch having a switch input wherein, when said switch input is in a first binary state, said controllable switch is in a conducting state and, when said switch input is in a second binary state, said controllable switch is in a nonconducting state; a second output for providing power to a xenon bulb; and a second capacitor for filtering the voltage at said second output; a pulse width modulator having a pulse width modulated output, said pulse width modulated output in communication with said switch input such that, when said pulse width modulated output is in a first binary state, said controllable switch is in said conducting state and, when said pulse width modulated output is in a second binary state, said controllable switch is in said nonconducting state, wherein said second output is not electrically isolated from said first input.