Invention Grant
US08350498B2 Dynamic current equalization for light emitting diode (LED) and other applications
有权
用于发光二极管(LED)和其他应用的动态电流均衡
- Patent Title: Dynamic current equalization for light emitting diode (LED) and other applications
- Patent Title (中): 用于发光二极管(LED)和其他应用的动态电流均衡
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Application No.: US12799611Application Date: 2010-04-28
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Publication No.: US08350498B2Publication Date: 2013-01-08
- Inventor: Hok-Sun Ling
- Applicant: Hok-Sun Ling
- Applicant Address: US CA Santa Clara
- Assignee: National Semiconductor Corporation
- Current Assignee: National Semiconductor Corporation
- Current Assignee Address: US CA Santa Clara
- Agent Wade J. Brady, III; Frederick J. Telecky, Jr.
- Main IPC: H05B37/02
- IPC: H05B37/02 ; G09G3/14

Abstract:
A system includes multiple dynamic current equalizers (DCEs). Each DCE includes a first control loop configured to regulate a current through a circuit branch associated with the dynamic current equalizer. The first control loop includes a first amplifier having two inputs. Each DCE also includes a second control loop configured to regulate a control signal. The second control loop includes a second amplifier having two inputs coupled to the inputs of the first amplifier. The first amplifier has an input offset compared to the second amplifier. The DCEs are configured such that one DCE regulates the control signal while one or more other DCEs regulate the currents through the associated circuit branches based on the control signal. The DCEs can be configured to achieve one or more ratios between multiple currents flowing through multiple circuit branches, where the one or more ratios are defined by resistances coupled to the DCEs.
Public/Granted literature
- US20110266972A1 Dynamic current equalization for light emitting diode (LED) and other applications Public/Granted day:2011-11-03
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