Invention Grant
- Patent Title: Tail-less LED control circuit
- Patent Title (中): 无尾LED控制电路
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Application No.: US12787599Application Date: 2010-05-26
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Publication No.: US08319444B2Publication Date: 2012-11-27
- Inventor: Chiawei Liao , Jing-Meng Liu , Leng-Nien Hsiu
- Applicant: Chiawei Liao , Jing-Meng Liu , Leng-Nien Hsiu
- Applicant Address: TW Hsinchu
- Assignee: Richtek Technology Corporation, R.O.C.
- Current Assignee: Richtek Technology Corporation, R.O.C.
- Current Assignee Address: TW Hsinchu
- Agency: Tung & Associates
- Main IPC: H05B37/00
- IPC: H05B37/00

Abstract:
The present invention discloses a tail-less LED control circuit, which includes: a power supply stage having an output terminal which provides electrical power to an LED circuit; an output capacitor coupled to the output terminal; an LED driver circuit coupled to the power supply stage for controlling the power supply stage to provide the electrical power to the LED circuit, the LED driver circuit receiving a PWM dimming signal for adjusting brightness of the LED circuit; and a MOSFET switch coupled to the output capacitor in series, the MOSFET switch switching synchronously with the PWM dimming signal to alleviate LED afterglow, wherein the MOSFET switch includes a body diode having an anode-cathode direction against the discharge direction of the output capacitor.
Public/Granted literature
- US20100301761A1 Tail-less LED Control Circuit Public/Granted day:2010-12-02
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