Non-synchronous switching regulator with improved output regulation at light or low loads
US6747441B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 20, 2002 |
| Grant date | Jun 8, 2004 |
| Priority date | — |
| Expiry date | Aug 20, 2022 |
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 or switching regulator is provided with a control circuit that controls a switching signal to a first switch. The switching signal is also coupled to a second switch in an inverted state, such as the first and second switches are switched “ON” and “OFF” in opposing states. The first switch and the second switch are coupled through a common node. The second switch is also coupled to ground. An inductor is coupled to the common node and an output capacitor. The switching signal generates an operating current through the inductor that charges the output capacitor to provide a regulated voltage at an output terminal. The second switch is designed to handle the small reverse current that occurs when the first switch is turned off preventing the regulator from entering a discontinuous mode during light load conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.