Mobile phone charger
US7821228B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Nov 29, 2007 |
| Grant date | Oct 26, 2010 |
| Priority date | — |
| Expiry date | Mar 11, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J7/342
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A charger includes a battery module, a boosting and charging circuit, a low voltage boosting circuit, and a charging interface. The battery module provides an operating voltage for the boosting and charging circuit and the low voltage boosting circuit. When the operating voltage is greater than a reference voltage of the boosting and charging circuit, the boosting and charging circuit module works and outputs a charging voltage to the charging interface. When the operating voltage is smaller than the reference voltage of the boosting and charging circuit but greater than a starting voltage of the low voltage boosting circuit, the low voltage boosting circuit works and boosts the operating voltage to the boosting and charging circuit, and then the boosting and charging circuit module works and outputs the charging voltage to the charging interface for the mobile phone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.