Single mode buck/boost regulating charge pump
US6522558B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 12, 2001 |
| Grant date | Feb 18, 2003 |
| Priority date | — |
| Expiry date | Jun 12, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/072
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A charge pump receives a direct current input voltage at a first level and provides a substantially constant direct current output voltage at a second level. Variations of the input voltage level above and below the output voltage level are handled seamlessly by a continuous mode control scheme that controls a charging current of the charge pump. The charge pump includes an error amplifier which produces a control signal based on a comparison of a feedback voltage proportional to the output voltage and a reference voltage. The control signal controls a variable current source to regulate the charging current provided to a charge storage component.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.