Switching power supply having a low power burst mode
US6252783A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 10, 2000 |
| Grant date | Jun 26, 2001 |
| Priority date | — |
| Expiry date | Apr 10, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A switching power supply includes a power switch and a mode controller that provides a mode control signal having a first level associated with a normal mode of operation of the switching power supply and a second level associated with a standby mode of operation of the switching power supply. The switching power supply further includes a feedback circuit coupled to the mode controller and a switching controller coupled to the feedback circuit. The feedback circuit has a voltage controlled current source that provides a feedback current which varies in response to the mode control signal. The switching controller switches the power switch in response to the feedback current so that in the normal mode of operation the power switch switches continuously at a predetermined frequency and in the standby mode of operation the power switch is switched on and off in bursts having a predetermined frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.