Apparatus and method for dual source, single inductor magnetic battery charger
US7560898B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 30, 2005 |
| Grant date | Jul 14, 2009 |
| Priority date | — |
| Expiry date | Jan 31, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J2207/40
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A voltage regulation and battery charging system is provided. The system may include a switching regulator selection control circuit, two switching regulator controller circuits, two power transistors, a common synchronous transistor, and a common LC circuit. The two switching regulator controller circuits may synchronously switch the two power transistors and the one common synchronous transistor. One of the switching regulator controller circuits may receive a voltage from an AC adapter and the other may receive a voltage from a USB port. Further, the switching regulation selection control circuit selects which of the two switching regulator controller circuits controls the regulation of the system output voltage employing the common LC filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.