Invention Grant
- Patent Title: Constant current driving system with stable output current
- Patent Title (中): 恒流驱动系统，输出电流稳定
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Application No.: US12754616Application Date: 2010-04-06
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Publication No.: US08314600B2Publication Date: 2012-11-20
- Inventor: Yung-Hsin Chiang
- Applicant: Yung-Hsin Chiang
- Applicant Address: KY Grand Cayman
- Assignee: IML International
- Current Assignee: IML International
- Current Assignee Address: KY Grand Cayman
- Agent Winston Hsu; Scott Margo
- Priority: TW98111416A 20090406
- Main IPC: G05F1/565
- IPC: G05F1/565
Abstract:
Constant current driving circuit includes a latch, an ON timer, and an OFF timer. The latch outputs a switch control signal according to an ON signal and an OFF signal for controlling a power switch. The power switch is coupled between an input voltage source and an inductor. When the switch control signal controls the power switch to turn on/off, the input voltage source is able/unable to couple to the inductor through the power switch. The inductor provides an output current and an output voltage. The ON timer detects if the output current reaches a peak value for accordingly outputting the OFF signal. The OFF timer outputs the ON signal according to the output voltage and the switch control signal for control the interval of the switch control signal representing “OFF”.
Public/Granted literature
- US20100253308A1 Constant Current Driving System with Stable Output Current Public/Granted day:2010-10-07
Information query
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