Switching power supply
US7492615B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 1, 2007 |
| Grant date | Feb 17, 2009 |
| Priority date | — |
| Expiry date | Jun 27, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/335
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A feedback circuit (3) generates an error amplification signal VEAO for stabilizing an output voltage Vo at the reference voltage. The reference voltage is set beforehand in the feedback circuit (3). The peak value of drain current ID passing through a switching element (1) is controlled by the error amplification signal VEAO and the output voltage Vo is stabilized. Meanwhile, when a load (132) increases, a reference voltage variable circuit (13) increases the internal reference voltage of the feedback circuit (3) based on the error amplification signal VEAO, so that fluctuations in output voltage due to load fluctuations are reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.