Pre-charging mechanism for multi-input switching charger
US9411387B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 13, 2014 |
| Grant date | Aug 9, 2016 |
| Priority date | — |
| Expiry date | Jul 4, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J2207/20
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A circuit for a switching charger includes multiple input supply nodes, and a number of charging paths. Each input supply node is connectable to a power source. Each charging path may include a middle node connected to a coupling switch and a pass transistor. The coupling switch may be configured to activate a corresponding charging path of the charging paths. A pre-charging switch may be coupled to a corresponding middle node of each charging path. The pass transistor of an activated one of the charging paths may be configured to provide a switching voltage at an input of a charging sub-circuit. The pre-charging switch may be configurable to pre-charge a middle node of a non-activated path to a high voltage to prevent an unwanted high current passing through a body diode of a corresponding pass transistor of the non-activated path.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.