Controlled current manipulation for regenerative charging of gate capacitance
US11146265B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 12, 2019 |
| Grant date | Oct 12, 2021 |
| Priority date | — |
| Expiry date | Jul 12, 2039 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A circuit for regenerative gate charging includes an inductor coupled to a gate of a FET. An output control circuit is coupled to a timing control circuit and a bridged inductor driver, which is coupled to the inductor. A sense circuit is coupled to the gate and to the timing control circuit, which receives a control signal, generates output control signals in accordance with a first switch timing profile, and transmits the output control signals to the output control circuit. In accordance with the first switch timing profile, the output control circuit holds switches of the bridged inductor driver in an ON state for a first period and holds all of the switches in an OFF state for a second period. Gate voltages are sampled during the second period and after the first period. The timing control circuit generates a second switch timing profile using the sampled voltages.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.