Quick-reset circuit for auxiliary power supply
US5956240A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 15, 1996 |
| Grant date | Sep 21, 1999 |
| Priority date | — |
| Expiry date | Nov 15, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Run/standby switching including switching to standby upon excessive current loading are provided in a switched mode power supply useful as an auxiliary power supply in a television. A switching controller IC is coupled between a primary transformer winding on the rectified raw B.sup.+ input voltage and ground. A switching transistor is coupled to the control input of the controller and is biased by the raw B.sup.+ input voltage for pulling down the control input. A run/standby control circuit and an overcurrent protective circuit disable the switching transistor during run mode operation and enable the switching transistor upon an overcurrent fault. The switched-mode power supply is further provided with a quick-reset capability to enable the power supply to consistently provide output voltages which are within nominal output voltage levels despite rapidly repeated dislocations in the operational mode of the apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.