Invention Grant
US08258719B2 Method and circuit arrangement for regulating a LED current flowing through a LED circuit arrangement, and associated circuit composition and lighting system
有权
用于调节流过LED电路布置的LED电流的方法和电路布置，以及相关的电路组成和照明系统
- Patent Title: Method and circuit arrangement for regulating a LED current flowing through a LED circuit arrangement, and associated circuit composition and lighting system
- Patent Title (中): 用于调节流过LED电路布置的LED电流的方法和电路布置，以及相关的电路组成和照明系统
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Application No.: US12864803Application Date: 2009-01-28
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Publication No.: US08258719B2Publication Date: 2012-09-04
- Inventor: Gian Hoogzaad
- Applicant: Gian Hoogzaad
- Applicant Address: NL Eindhoven
- Assignee: NXP B.V.
- Current Assignee: NXP B.V.
- Current Assignee Address: NL Eindhoven
- Priority: EP08101113 20080130
- International Application: PCT/IB2009/050342 WO 20090128
- International Announcement: WO2009/095865 WO 20090806
- Main IPC: G05F1/00
- IPC: G05F1/00 ; H05B37/02 ; H05B39/04 ; H05B41/36
Abstract:
The invention provides a method for regulating a LED current (ILED) flowing through a LED circuit arrangement at a mean LED current level. The method includes establishing an oscillating converter current (IL), establishing a first and a second current control indicator representative of a flow of a converter current (IL); regulating a peak and valley current level of the converter current in dependence on the first current control indicator; controlling a converter current period (T) of an oscillation of the converter current in dependence on the second current control indicator to be within a period control range (Tref) and feeding at least part of the converter current to the LED circuit arrangement. The invention also provides a circuit arrangement for regulating a LED current using the method, a LED driver IC using the circuit arrangement, a circuit composition with at least one LED and the circuit arrangement, and a lighting system with the circuit composition.
Public/Granted literature
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