Self-oscillating circuit for driving high-side and low-side switching devices with variable width pulses
US6657399B2 · kind B2 · utility
5Cited by
8References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 14, 2002 |
| Grant date | Dec 2, 2003 |
| Priority date | — |
| Expiry date | Mar 24, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A self-oscillating circuit for driving high-side and low-side switching devices, such as MOSFETs connected in a half-bridge configuration. The circuit alternately turns on the switching devices by providing alternating gate pulses varying in duration or width. The pulses are separated by dead time to prevent cross conduction. At start up, the pulses increase from a minimum duration of zero to a maximum duration, while dead time duration simultaneously decreases to its minimum duration, to provide soft start.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.