Invention Grant
- Patent Title: Constant current regulator with current sensing circuit loop
- Patent Title (中): 具有电流检测电路回路的恒流稳压器
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Application No.: US11907545Application Date: 2007-10-15
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Publication No.: US07652462B2Publication Date: 2010-01-26
- Inventor: Ming-Chia Wang , Hung-Chi Chu , Yuhren Shen
- Applicant: Ming-Chia Wang , Hung-Chi Chu , Yuhren Shen
- Applicant Address: TW Hsin-Chu, Hsien
- Assignee: Vastview Technology, Inc.
- Current Assignee: Vastview Technology, Inc.
- Current Assignee Address: TW Hsin-Chu, Hsien
- Agency: Rosenberg, Klein & Lee
- Priority: TW96131569A 20070824
- Main IPC: G05F1/40
- IPC: G05F1/40 ; G05F1/10
Abstract:
A constant current regulator includes a current sensing circuit loop connected to a switch unit of the constant current regulator to detect a current flowing through the switch unit and to generate a detection current that is in proportion to the current flowing through the switch unit. The detection current flows through a detection resistor to induce a detection voltage. A differential amplifier bases on a set voltage and the received detection voltage to generate an error voltage to a pulse width modulation controller, which in turn causes a gate driver circuit to control the switching operation of the switch unit thereby supplying a constant current to a load connected to an output voltage of the regulator.
Public/Granted literature
- US20090051338A1 Constant current regulator with current sensing circuit loop Public/Granted day:2009-02-26
Information query
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