Driving circuit and control circuit
US8502461B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 25, 2011 |
| Grant date | Aug 6, 2013 |
| Priority date | — |
| Expiry date | Mar 9, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/375
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A driving circuit, comprising a power supply, a transistor unit and a feedback control circuit, is disclosed. The power supply is adaptor to provide an electric power to drive a load. The transistor unit comprises at least one load coupling end to couple to the load for adjusting an amount of current flowing through the load. The feedback control circuit controls an amount of the electric power provided by the power supply according to a voltage level of the least one load coupling end. Wherein, the feedback control circuit comprises an error amplifying circuit and a feedback control switch. The error amplifying circuit generates an error amplified signal according to the voltage level of the least one load coupling end, and the feedback control switch is coupled to an output of the error amplifying circuit and is switched between a turn-on state and a turn-off state based on a dimming signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.