Overcurrent protection circuit for protecting overcurrent flowing through switching element and switching circuit with the overcurent protection circuit
US12212132B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 12, 2019 |
| Grant date | Jan 28, 2025 |
| Priority date | — |
| Expiry date | Apr 18, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/158
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An overcurrent protection circuit is provided for protecting an overcurrent flowing through a switching element that is controlled to be turned on and off based on a drive signal. The overcurrent protection circuit includes: a first transistor that is an N-channel field effect transistor (FET) having a drain connected to a control terminal of the switching element and a grounded source; a second transistor that is a PNP bipolar transistor having an emitter connected to the control terminal of the switching element, a collector connected to a gate of the first transistor and grounded via a first capacitor, and a base pulled up to a predetermined pull-up voltage; and a ground circuit connected in parallel with the first capacitor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.