Switching power supply with input voltage reduction detection
US5917714A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 28, 1998 |
| Grant date | Jun 29, 1999 |
| Priority date | — |
| Expiry date | May 28, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A switching power supply which takes out an output current from a secondary winding when a switching circuit for switching a current flowing through a primary winding is turned off and supplies a DC output to a load device having a control input for decreasing an amount of consumption power thereof. The switching power supply includes a voltage reduction detection circuit for detecting a voltage generated at the secondary winding when the switching circuit is in an on-state and for outputting to the control input a reduction signal representing reduction of an input voltage of the primary winding side when the detected voltage is out of a predetermined range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.