Apparatus and method for magnetic charger IC for batteries with recycling of the LC filter for re-use as a battery step-down converter
US7570020B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 30, 2005 |
| Grant date | Aug 4, 2009 |
| Priority date | — |
| Expiry date | Feb 17, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/0045
- 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, a common LC circuit, and a battery charger 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 voltage from an AC adapter and the other may receive voltage from the battery. The first switching regulator controller circuit is employed to provide system power when the AC adapter is connected. When the battery is used to provide the system power, the second switching regulator controller circuit is used to down-convert the battery voltage to provide the system power.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.