Switching power supply apparatus provided with series-connected charge pump circuits
US7394673B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 31, 2006 |
| Grant date | Jul 1, 2008 |
| Priority date | — |
| Expiry date | Sep 1, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/071
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A first charge pump circuit converts an input voltage (Vin) into a predetermined voltage, to be outputted as a first output voltage (Vout1). A second charge pump circuit converts the first output voltage (Vout1), outputted from the first charge pump circuit, into a predetermined voltage, to be outputted as a second output voltage (Vout2). A control circuit controls charge-discharge states of the first charge pump circuit and the second charge pump circuit. The control circuit synchronously controls a state in which a first output capacitor of the first charge pump circuit is charged, and a state in which a second flying capacitor of the second charge pump circuit is charged.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.