LED driving circuit and LED lamp
US12302465B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 9, 2023 |
| Grant date | May 13, 2025 |
| Priority date | — |
| Expiry date | Jul 26, 2043 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An LED driving circuit includes a rectifying unit, a filtering unit, a power conversion unit and a leakage protection unit. The leakage protection unit includes: a main control chip capable of detecting an impedance of a power grid and turning on or off an LED driving circuit loop depending on whether the impedance of the power grid exceeds a set value; and a first switching element arranged outside the main control chip and controlled thereby to turn on or off the LED driving circuit loop synchronously with the main control chip. The present disclosure includes the first switching element capable of turning on or turning off the LED driving circuit loop, and the first switching element is arranged independently of the main control chip, achieving shunting of the current flowing through the leakage protection unit, reducing an operating temperature of the main control chip for compatibility with high power products.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.