Method and circuit for driving an LED load with phase-cut dimmers
US9301352B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 13, 2014 |
| Grant date | Mar 29, 2016 |
| Priority date | — |
| Expiry date | Mar 13, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Embodiments of a dimmable driver circuit for a light-emitting diode (LED) load and a method for driving an LED load are described. In one embodiment, a dimmable driver circuit for an LED load includes an alternating current (AC)-direct current (DC) rectifier configured to convert an AC input voltage into a DC voltage, a damper and filter circuit configured to provide a latching current to a phase-cut dimmer and to suppress an inrush current caused by phase-cut dimming, and to filter electromagnetic interference (EMI) noise from the DC voltage, and a switching converter circuit connected to the damper and filter circuit and configured to operate in a boundary conduction mode (BCM) with a constant on-time to generate DC power for the LED load in response to the DC voltage. Other embodiments are also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.