Zero Current Switching
First Claim
1. A method for providing non-resonant zero-current switching in a switching power converter operating in a continuous current mode, said switching power converter converting power from input power to output power, said switching power converter including a main switch connected to at least one main inductor, wherein an auxiliary inductor is connectible with the main inductor, wherein main current flows from an input to an output, the method comprising the steps of:
- connecting the auxiliary inductor with the main inductor thereby charging the auxiliary inductor so that an auxiliary current flows from the output to the input opposing said main current; and
upon a total current substantially equaling zero, switching on the main switch, wherein said total current includes a sum of said main current and said auxiliary current.
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Accused Products
Abstract
A method for providing non-resonant zero-current switching in a switching power converter operating in a continuous current mode. The switching power converter converts power from input power to output power. The switching power converter includes a main switch connected to a main inductor, wherein an auxiliary inductor is connectible with the main inductor. The main current flows from an input to an output. The auxiliary inductor is connected with the main inductor thereby charging the auxiliary inductor so that an auxiliary current flows from the output to the input opposing the main current. Upon a total current including a sum of the main current and the auxiliary current. substantially equals or approaches zero, the switch is turned on.
169 Citations
15 Claims
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1. A method for providing non-resonant zero-current switching in a switching power converter operating in a continuous current mode, said switching power converter converting power from input power to output power, said switching power converter including a main switch connected to at least one main inductor, wherein an auxiliary inductor is connectible with the main inductor, wherein main current flows from an input to an output, the method comprising the steps of:
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connecting the auxiliary inductor with the main inductor thereby charging the auxiliary inductor so that an auxiliary current flows from the output to the input opposing said main current; and upon a total current substantially equaling zero, switching on the main switch, wherein said total current includes a sum of said main current and said auxiliary current. - View Dependent Claims (2)
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3. A switching converter including at least one stage selected from the group consisting of a buck stage and a boost stage, said at least one stage comprising:
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a main switch connecting an input voltage terminal to a first node; a main inductor connected at one end to said first node and at the other end operatively connected at a second node to a voltage output; and an auxiliary inductor adapted for connecting in parallel with the main inductor between said first and second nodes. - View Dependent Claims (4, 5, 6, 7, 8)
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9. A switching converter comprising:
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a plurality of main switches interconnected in a full bridge topology, said main switches including a first switch, a second switch, a third switch and a fourth switch, wherein a pair of input voltage terminals are attachable at a first node connecting said first and third switches and at a second node connecting said second and fourth switches;
wherein a first output voltage terminal is operatively attached at a third node connecting said third and fourth switches and a second output voltage terminal is operatively attached at a fourth node connecting said first and second switches;a first main inductor attachable between said first output voltage terminal and said third node; a second main inductor attachable between said second output voltage terminal and said fourth node; and an auxiliary inductor connectible between said third node and said fourth node. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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Specification