Power supply device and driving method thereof
US8514591B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 18, 2012 |
| Grant date | Aug 20, 2013 |
| Priority date | — |
| Expiry date | May 18, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/0025
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a power supply device generating an output power by using an AC line voltage generated through rectification of an AC input, and a driving method thereof. The power supply device controls the switching operation of the power switch by using a sensing voltage corresponding to the drain current flowing to the power switch and the feedback voltage corresponding to the output voltage. The power supply device controls the feedback current every switching cycle to generate a threshold voltage, and compares the sensing voltage and the threshold voltage to control the turn-off of the power switch. The feedback current includes the first current to generate the feedback voltage, and the threshold voltage follows a curved line waveform in which the increasing slope is decreased during the switching cycle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.