Switch circuit having protection function to interrupt input of control signal
US6205010A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Nov 14, 1997 |
| Grant date | Mar 20, 2001 |
| Priority date | — |
| Expiry date | Nov 14, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2017/0806
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
In an electric power switch circuit with an overcurrent or overheating protection function, unnecessary ON-OFF cycling is prevented. A MOSFET is used as an electric power element for energizing a load according to a control signal. A temperature detector detects the temperature in the neighborhood of the MOSFET, and a control unit opens a switch, interrupting input of the control signal to the MOSPET when the temperature detected by the temperature detecting means is higher than the predetermined temperature. An interruption status retaining device maintains the interruption of the control signal, preventing repetitive ON-OFF cycling.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.