Bootstrap capacitor charge circuit with limited charge current
US6924626B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 10, 2003 |
| Grant date | Aug 2, 2005 |
| Priority date | — |
| Expiry date | Dec 21, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F1/613
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A bootstrap capacitor charging circuit comprising a bootstrap capacitor, a semiconductor switch controlled by a control terminal, the control terminal coupled to a source of charging current for the bootstrap capacitor, the switch having two main terminals, the first main terminal coupled to the source of charging current and the second main terminal coupled to the bootstrap capacitor, and a voltage regulator device having a regulation voltage and coupled to the control terminal of the switch, the switch turning off when a voltage across the capacitor approximately equals the regulation voltage of the voltage regulation device, thereby limiting the charging current into the bootstrap capacitor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.