Hard switching disable for switching power device
US10477626B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 20, 2017 |
| Grant date | Nov 12, 2019 |
| Priority date | — |
| Expiry date | Nov 15, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/162
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A controller for driving a power switch incorporates a hard turn-on disable circuit to prevent the power switch from turning on when the power switch is sustaining a high voltage value. The hard turn-on disable circuit includes a hard turn-on detection circuit and a protection logic circuit. The hard turn-on disable circuit is configured to block or to pass the system input signal to the normal gate drive circuit of the power switch depending on the detection indicator signal. In particular, the protection logic circuit blocks the system input signal VIN in response to a high voltage detection so that the power switch ignores the system input signal VIN, which may be erroneous, and the power switch is prevented from undesirable hard switching.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.