Zero current detecting circuit and related synchronous switching power converter
US8441238B2 · kind B2 · utility
11Cited by
8References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 8, 2011 |
| Grant date | May 14, 2013 |
| Priority date | — |
| Expiry date | Dec 21, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A zero current detecting circuit is disclosed. The zero current detecting circuit includes a first zero current comparator for determining current variation on an inductor of a synchronous switching power converter so as to accordingly turn off a down-bridge transistor of the synchronous power converter; a second zero current comparator for determining whether the first zero current comparator turns off the down-bridge transistor too early or too late and outputting a comparison result, and a counter coupled to the second zero current comparator for ascending or descending a control bit according to the comparison result.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.