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US 2012/0069615 A1Published application
Bridgeless power factor correction converter
AssigneeTDK Corporation
InventorSatoshi TOMIOKA
Life of this patent
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Abstract
A bridgeless power factor correction converter is configured such that a gate driver controls the ON ratio of a booster converter switch so that the ON ratio is gradually increased from 0, i.e., performs soft start control, every time the voltage polarity of an AC input in a totem-pole bridgeless power factor converter (TPBL converter is inverted) is inverted.
Claims3
A bridgeless power factor correction converter, having no bridge rectifier circuit that rectifies an alternating current input from an alternating current power supply, the bridgeless power factor correction converter comprising:
- a switching device for a booster converter;
- and
- a gate driver that gradually increases an ON ratio of the switching device every time a voltage polarity of the alternating current input is inverted.
Dependencies are inferred from the claim text.