Method and apparatus for driving a power MOS device as a synchronous rectifier
US7948296B2 · kind B2 · utility
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11References
16Claims
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Key dates
| Filing date | Oct 13, 2006 |
| Grant date | May 24, 2011 |
| Priority date | — |
| Expiry date | Feb 24, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A synchronous rectifier comprising a MOSFET device, and a gate driver for driving the gate of the MOSFET device, the MOSFET device comprising first and second MOSFET transistors coupled with their drain-source paths in parallel to receive an alternating current waveform for rectification by the drain-source paths of the MOSFET transistors, the first transistor having a low Rdson and the second transistor having a high Rdson whereby the apparent Rdson of the MOSFET device is increased when the current through the MOSFET device is below a threshold thereby enabling zero crossing detection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.