Invention Grant
- Patent Title: Constant current source based on self-oscillating soft-switching LLC converter topology
- Patent Title (中): 基于自激软开关LLC转换器拓扑的恒流源
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Application No.: US14334192Application Date: 2014-07-17
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Publication No.: US09307587B1Publication Date: 2016-04-05
- Inventor: Wei Xiong
- Applicant: Universal Lighting Technologies, Inc.
- Applicant Address: US AL Madison
- Assignee: Universal Lighting Technologies, Inc.
- Current Assignee: Universal Lighting Technologies, Inc.
- Current Assignee Address: US AL Madison
- Agency: Patterson Intellectual Property Law, P.C.
- Agent Mark J. Patterson
- Main IPC: H05B33/08
- IPC: H05B33/08 ; H05B37/02 ; H02M3/338

Abstract:
A driver circuit (e.g., an LED driver circuit) provides power to a load (e.g. an LED light source) from a DC power rail. A self-oscillating LLC series resonant inverter is configured to connect to the DC power rail, receive DC power from the DC power rail, and provide an AC output signal. A current limiting capacitor is connected to the self-oscillating LLC series resonant inverter. The current limiting capacitor receives the AC output signal from the self-oscillating LLC series resonant inverter and provides an AC current signal. The rectifier circuit receives the AC current signal from the current limiting capacitor and provides a DC current to the load.
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