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AssigneeShanghai Nanxin Semiconductor Technology Co., Ltd.
InventorsXing LIANG, Wei ZHAO
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A biphasic Dickson switched capacitor converter with zero voltage switching is provided. The biphasic Dickson switched capacitor converter introduces an auxiliary circuit between middle points of two freewheeling bridge arms of a conventional biphasic Dickson converter, and charges at a middle point of a first freewheeling bridge arm are transferred to a second freewheeling bridge arm by controlling the auxiliary circuit during a dead time when main power transistors are turned off to realize zero voltage switching of the main power transistors and reduce a switching loss. An on-resistance of an introduced auxiliary power transistor is larger than an on-resistance of the main power transistors. An inductance value of an auxiliary inductor is small and a package size and cost are low. Therefore, the biphasic Dickson switched capacitor converter reduces the switching loss of switched capacitor converter, improve efficiency, have performance benefits and commercial prospects by introducing the auxiliary circuit.
A biphasic Dickson switched capacitor converter with zero voltage switching, wherein two freewheeling bridge arms comprising a first freewheeling bridge arm and a second freewheeling bridge arm are provided on two sides of an output end of a topology structure of the biphasic Dickson switched capacitor converter, and a power transistor in the biphasic Dickson switched capacitor converter is defined as a main power transistor, wherein a control auxiliary circuit is provided between the two freewheeling bridge arms, and the control auxiliary circuit is used for transferring charges on the first freewheeling bridge arm to the second freewheeling bridge arm during a dead time when main power transistors are turned off, wherein voltages at two ends of the main power transistors become zero to achieve zero voltage switching of the main power transistors.
Dependencies are inferred from the claim text.