Constant current control circuit
US9198240B2 · kind B2 · utility
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4Claims
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Key dates
| Filing date | Mar 16, 2013 |
| Grant date | Nov 24, 2015 |
| Priority date | — |
| Expiry date | Feb 22, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A constant current control circuit includes a current source output module and at least two output circuits. Each of the output circuits includes an automatic constant current regulating module, a power transistor drive and control module electrically coupled to automatic constant current regulating module, and a load module formed of one or more LED devices and electrically coupled to a power transistor drive and control module. The constant current control circuit in operation tracks changes in current of each output circuit and regulates the currents of all the output circuits accordingly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.