Controlling an active clamp switching power converter circuit based on a sensed voltage drop on an auxiliary winding
US11050350B1 · kind B1 · utility
2Cited by
1References
17Claims
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Key dates
| Filing date | Mar 20, 2020 |
| Grant date | Jun 29, 2021 |
| Priority date | — |
| Expiry date | Mar 20, 2040 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An active clamp switching power converter circuit includes a sensing circuit that generates a sensed auxiliary winding voltage of an auxiliary winding around the core. A primary side controller controls switching of a power switch coupled to a primary winding to control current through the primary winding and controls switching of the active clamp switch based on the sensed voltage to control leakage energy when the power switch is turned off. The primary side controller regulates timing of the switching to achieve a zero voltage switching condition prior to turning on the power switch for power efficient operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.