LED driver suitable for low-voltage operation and method therefor
US11985744B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 19, 2022 |
| Grant date | May 14, 2024 |
| Priority date | — |
| Expiry date | Sep 2, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/44
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In one form, a switching controller includes a buck controller and a bypass circuit. The buck controller has an input for receiving a variable voltage, an output for providing a buck voltage by switching the variable voltage into an inductive output filter according to a switching signal having a variable duty cycle to regulate a current into a load. The bypass circuit is coupled to the buck controller for comparing the variable duty cycle of the switching signal to a threshold, for activating a bypass signal in response to the variable duty cycle exceeding the threshold, and for subsequently de-activating the bypass signal according to a predetermined algorithm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.