Charge pump with current limiting circuit
US6504422B1 · kind B1 · utility
115Cited by
6References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 21, 2000 |
| Grant date | Jan 7, 2003 |
| Priority date | — |
| Expiry date | Nov 21, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/32
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A charge pump power supply includes two or more modes of operation. An input protection circuit is connected between an input of the power supply and a voltage source. The input protection circuit regulates the voltage at the input of the power supply, limits current at the input when switching from a weaker mode to a stronger mode, and prevents current reversal when switching from a stronger mode to a weaker mode. In some modes, the power supply continuously provides current to the load, obviating the need for an output capacitor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.