Control circuit for switching power supply
US8604758B1 · kind B1 · utility
Assignees
Inventors
Key dates
| Filing date | Aug 12, 2012 |
| Grant date | Dec 10, 2013 |
| Priority date | — |
| Expiry date | Aug 12, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A control circuit includes a power controller, a comparator, and first to fifth electronic switches. When an electronic device is operating with light load, a voltage received by the inverting terminal of the comparator is less than a voltage received by the non-inverting terminal of the comparator, such that the first and fourth electronic switches are turned on, and the second, third, and fifth electronic switches are turned off. A first power supply is output to the switching power supply. When the electronic device is operating with heavy load, the voltage received by the inverting terminal of the comparator is greater than the voltage received by the non-inverting terminal of the comparator, such that the first and fourth electronic switches are turned off, and the second, third, and fifth electronic switches are turned on. A second power supply is output to the switching power supply.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.