Apparatus and method for adjusting working frequency of voltage regulator down circuit (VRD) by detecting current
US7795852B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 22, 2008 |
| Grant date | Sep 14, 2010 |
| Priority date | — |
| Expiry date | May 10, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/0009
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention provides an apparatus for adjusting a working frequency of a VRD. The apparatus includes a current detecting circuit, a variable resistance module, and a controller. The current detecting circuit is adapted for determining an output load state of the VRD by detecting a value of a current outputting from the VRD, and outputting a control signal for adjusting the working frequency of the VRD according to the output load state of the VRD. The variable resistance module is coupled to the VRD, and is adapted for providing an external resistor to the VRD. The controller is coupled to the current detecting circuit, and is adapted for receiving the control signal, and adjusting a resistance of the variable resistance module, so as to adjust the working frequency of the VRD.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.