Invention Grant
- Patent Title: Constant current control based on indirect current sensing for critical conduction mode buck converter
- Patent Title (中): 基于临界导通模式降压转换器间接电流检测的恒流控制
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Application No.: US13864563Application Date: 2013-04-17
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Publication No.: US09125250B1Publication Date: 2015-09-01
- 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: H05B37/00
- IPC: H05B37/00 ; H05B37/02 ; H02M3/156
Abstract:
A light fixture includes a converter operable to drive a light source of the light fixture. The buck converter is operable to provide a predetermined average current to the light source or load. A switch of the buck converter is located in the low side of the buck converter such that a controller of the buck converter may drive the switch directly without the use of an isolation transformer. The buck converter controls operation of the switch based on current through the switch and current through the primary inductor of the buck converter.
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