Multi-output power supply device having charge pump circuit
US8102157B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 16, 2008 |
| Grant date | Jan 24, 2012 |
| Priority date | — |
| Expiry date | Jun 20, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/007
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A multi-output power supply device of low noise is disclosed that converts a first input voltage to plural different voltages. The multi-output power supply device includes a first power supply circuit for generating a constant voltage from the first input voltage, and outputs the constant voltage through a first output terminal; and one or more second power supply circuits each including a charge pump circuit for generating a constant voltage from the output voltage from the first power supply circuit. Each of the second power supply circuits changes a period of a charging and discharging cycle for charging and discharging a flying capacitor according to an electric current output from the second output terminal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.