Synchronous rectification control method and control circuit and switching voltage regulator
US9966854B2 · kind B2 · utility
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20Claims
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Key dates
| Filing date | Sep 26, 2014 |
| Grant date | May 8, 2018 |
| Priority date | — |
| Expiry date | Jul 7, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In one embodiment, a synchronous rectification control method can include: (i) setting or updating a count value when a rectification switch is turned on; (ii) generating an off enable signal after a delay time corresponding to the count value has elapsed; (iii) turning off the rectification switch based on the off enable signal, and comparing a drain-source voltage of the rectification switch against a reference voltage; and (iv) generating a comparison signal for updating the count value based on the drain-source voltage and the reference voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.