Patent Number: 6,166,926

Title: Zero voltage switching power supply with burst mode

Abstract: In a tuned switch mode power supply, a supply inductance is coupled to a capacitance to form a tuned, resonant circuit. A transistor switch is coupled to the resonant circuit for generating current pulses in the inductance, coupled to a load circuit to provide an output of the power supply. Resonant voltage pulses are developed between a pair of main current conducting terminals of the transistor switch. A controller is coupled to the transistor switch for generating a switch control signal, during a run mode of operation. The transistor switch is turned on periodically, when the resonant voltage pulses reaches a zero voltage, to provide for zero voltage switching. The generation of the current pulses is disabled to provide for a burst mode operation, in a standby mode operation.

Inventors: Nath; Gautam (Olympia, WA), Fitzgerald; William Vincent (Zionsville, IN)

Assignee: Thomson Licensing S.A.

International Classification: H02M 3/24 (20060101); H02M 3/338 (20060101); H02M 003/335 ()

Expiration Date: 12/26/2017