Load current dependent reduction of charge battery current
US7746036B2 · kind B2 · utility
5Cited by
15References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 2, 2008 |
| Grant date | Jun 29, 2010 |
| Priority date | — |
| Expiry date | Oct 1, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F1/30
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Circuits and methods to charge batteries of a portable device simultaneously with supplying power to the device for its operation, using a power source with limited maximum current, as e.g. an USB port, have been achieved. The system invented relies upon digital control only. No direct sensing of the current required for the operation of the portable device is required. The control takes care that the sum of the charging current and of the current to run the portable device does not exceed the maximum allowable current of the power source. The current required to run the portable device has precedence over the charging current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.