Reverse current preventing circuit with an automatic correction of reference
US7292018B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 7, 2006 |
| Grant date | Nov 6, 2007 |
| Priority date | — |
| Expiry date | Jun 30, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A synchronous switching voltage converter has a first switch, a second switch, and an inductor, coupled together to a switch node. A reverse current preventing circuit has a fixed reference current source, a correcting circuit, a variable reference current generating circuit, and a comparing circuit. Based on a comparison between an inductor current and the fixed reference current source, the correcting circuit generates a correcting signal. The variable reference current generating circuit generates a variable reference current signal, which is adjusted in accordance with the correcting signal. Based on a comparison between the inductor current and the variable reference current signal, the comparing circuit applies a preventing signal to the second switch so as to turn off the second switch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.