Dynamic current equalization for light emitting diode (LED) and other applications
US8350498B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 28, 2010 |
| Grant date | Jan 8, 2013 |
| Priority date | — |
| Expiry date | Jan 31, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/46
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.