Switching power supply
US6292376A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 14, 2000 |
| Grant date | Sep 18, 2001 |
| Priority date | — |
| Expiry date | Aug 14, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/33507
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An improved switching power supply which saves power when under a small to no load, wherein a transformer is provided comprising a primary winding to which a DC current is supplied by turning ON and OFF a switching device and a secondary winding for supplying an output signal to the load; an ON state control circuit turns ON the switching device by using the output signal induced at the secondary winding; an OFF state control circuit turns OFF the switching device using a current control signal obtained from the output signal from the secondary winding and a reference signal; and wherein a delay circuit prolongs the time at which the switching device makes the OFF to ON transition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.