Charger and electronic device
US9350197B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 24, 2013 |
| Grant date | May 24, 2016 |
| Priority date | — |
| Expiry date | Feb 7, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J7/04
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A charger includes a mains plug, a voltage conversion unit, a power port, a feedback resistor module, and a microprocessor. The power port includes a positive voltage pin, a negative voltage pin, and a control pin. The feedback resistor module is connected between the negative voltage pin, a feedback port of the voltage conversion unit, and ground. The microprocessor is connected to the control pin and the feedback resistor module. The feedback port of the voltage conversion unit outputs a constant voltage, and a current output by the charger is equal to a ratio between the constant voltage and a resistance value of the feedback resistor module. The microprocessor increases the resistance value of the feedback resistor module when receiving a first control signal, and decreases the resistance value of the feedback resistor module when receiving a second control signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.