Self-driven AC-DC synchronous rectifier for power applications
First Claim
1. A system, comprising:
- a set of power switches that receive an input power signal and rectify the input power signal to generate a rectified power signal as an output to facilitate synchronous rectification of the input power signal; and
a self-driven gate-drive (SDGD) subsystem that facilitates control of respective switching of respective power switches of the set of power switches, wherein the SDGD subsystem is powered by the rectified power signal or the input power signal, wherein the SDGD subsystem comprises a set of capacitors comprising a first capacitor, a second capacitor, and a third capacitor, and wherein the SDGD subsystem controls respective charging of the first capacitor, the second capacitor, and the third capacitor to facilitate maintaining a first power switch of the set of power switches in a first switch state during a start-up phase of operation of the system until the SDGD subsystem is determined to be operating in steady state.
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Accused Products
Abstract
Systems, methods, and devices that employ self-driven gate-drive circuitry to facilitate controlling power switches to emulate a diode bridge to synchronously rectify a power signal are presented. A single-phase or multi-phase synchronous rectifier can comprise at least a first pair of switches of a first conducting path and a second pair of switches of a second conducting path that can form or emulate a diode bridge. To facilitate emulating turn-on and turn-off conditions of a diode, a switch can be turned on when voltage across the switch is forward-biased and turned off when switch current is reversed; also, there can be at least one current-controlled switch in each conducting path. Self-driven gate-drive circuitry employs low power components that can facilitate controlling respective switching of the at least first pair and second pair of switches, wherein switching of the switches is also controlled at start-up to emulate a diode bridge.
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Citations
20 Claims
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1. A system, comprising:
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a set of power switches that receive an input power signal and rectify the input power signal to generate a rectified power signal as an output to facilitate synchronous rectification of the input power signal; and a self-driven gate-drive (SDGD) subsystem that facilitates control of respective switching of respective power switches of the set of power switches, wherein the SDGD subsystem is powered by the rectified power signal or the input power signal, wherein the SDGD subsystem comprises a set of capacitors comprising a first capacitor, a second capacitor, and a third capacitor, and wherein the SDGD subsystem controls respective charging of the first capacitor, the second capacitor, and the third capacitor to facilitate maintaining a first power switch of the set of power switches in a first switch state during a start-up phase of operation of the system until the SDGD subsystem is determined to be operating in steady state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method, comprising:
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generating a rectified power signal in response to an input power signal received by a set of power switches, wherein respective power switches of the set of power switches are arranged with respect to each other to emulate functionality of a diode rectifier; supplying at least a portion of the rectified power signal to a self-driven gate-drive (SDGD) subsystem associated with the set of power switches to facilitate controlling respective switching of the respective power switches of the set of power switches; and controlling respective charging of a first capacitor, a second capacitor, and a third capacitor of the SDGD subsystem to charge the first capacitor to a first voltage that is higher than a second voltage of the second capacitor before the third capacitor is charged to a third voltage that facilitates switching the first power switch from a first switch state to a second switch state, wherein the controlling of the respective charging of the first capacitor, the second capacitor, and the third capacitor facilitates maintaining the first power switch in the first switch state during initiation of the SDGD subsystem until the SDGD subsystem is operating in steady state. - View Dependent Claims (14, 15, 16, 17)
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18. A self-driven synchronous rectifier device, comprising:
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a set of power switches that is configured to receive an input voltage signal and rectify the input voltage signal to generate a rectified voltage signal as an output; and a self-driven gate-drive (SDGD) subsystem that controls respective switching of respective power switches of the set of power switches, wherein the SDGD subsystem receives at least a portion of the rectified voltage signal, wherein the SDGD subsystem comprises a set of capacitor components comprising a first capacitor component, a second capacitor component, and a third capacitor component, and wherein the SDGD subsystem controls respective charging of the first capacitor component, the second capacitor component, and the third capacitor component to facilitate maintaining a first power switch of the set of power switches in a first switch state during initiation of operation of the SDGD subsystem until the SDGD subsystem is operating in steady state. - View Dependent Claims (19, 20)
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Specification