Zero voltage switching power supply with burst mode
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United States of America Patent
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Dec 26, 2000
Grant Date -
N/A
app pub date -
Jan 11, 2000
filing date -
Jan 11, 2000
priority date (Note) -
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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.
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