Over-temperature protection circuit of an LED driving power supply
US11363696B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 1, 2019 |
| Grant date | Jun 14, 2022 |
| Priority date | — |
| Expiry date | Apr 1, 2039 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The application relates to an over-temperature protection circuit of an LED driving power supply. The over-temperature protection circuit comprises a temperature detection circuit for sensing a temperature change; a switch control circuit connected to the output end of the temperature detection circuit and controlling the on-off of the circuit according to the output signal of the temperature detection circuit; a shunt circuit connected to an output end of the switch control circuit and shunting current when the switch control circuit is in an on state; a current detection circuit connected to an output end of the shunt circuit and changing a current detection signal according to an output current of the shunt circuit; the output end of the current detection circuit is connected with the feedback loop. The application has the advantages of low cost, stable performance, little environmental influence and high precision.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.