Smooth switching power control circuit and method
US5861720A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 25, 1996 |
| Grant date | Jan 19, 1999 |
| Priority date | — |
| Expiry date | Nov 25, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S315/07
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A power control circuit achieves a relatively smooth turn-on conduction transition characteristic and a relatively low power consumption. A controlled transition circuit conducts current to a load when in a fully conductive state. The transition circuit transitions from a non-conductive state to the fully conductive state over a predetermined amount of time to limit the di/dt and the interference signals generated by the di/dt. A low forward voltage conduction circuit also conducts current to the load in a conductive state and diverts current to the transition circuit when in a non-conductive state. The conduction circuit creates a second predetermined voltage across the terminals when in the conductive state which is substantially less than the first predetermined voltage to reduce the power consumption.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.