Floating power supply for a driver circuit configured to drive a high-side switching transistor
US11251691B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 3, 2020 |
| Grant date | Feb 15, 2022 |
| Priority date | — |
| Expiry date | Sep 3, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K19/01735
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A high-side switching transistor of a rectifier circuit is driven by a high-side driver circuit to supply current to an output node. The high-side driver circuit is powered between a capacitive bootstrap node and the output node. A boot charge circuit charges the bootstrap capacitor by supplying current to the bootstrap node. The boot charge circuit includes: a first current path that selectively supplies a first charging current to the bootstrap node when the rectifier circuit is operating in a switching mode; and a second current path that selectively supplies a second charging current to the bootstrap node when the rectifier circuit is operating in a reset mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.