DC-DC converter for the control of a battery charge current in portable electronic devices
US9276469B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 13, 2010 |
| Grant date | Mar 1, 2016 |
| Priority date | — |
| Expiry date | Feb 27, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/158
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A DC-DC converter controls a supply current (IIN) provided to a rechargeable battery. The converter comprises an electrical input terminal that receives supply current (IIN). An electrical output terminal is connected to the battery through a coil with a resistor in series therebetween. A controllable selector connects the input terminal to the output terminal during a first time interval in order to supply the battery and to connect the input terminal to a ground potential during a successive second time interval. Also, a feedback module generates a control signal for the selector from a resistor feedback signal, indicative of a variation of a battery charge current (IOUT). The feedback module has an electronic block that receives the feedback signal. The electronic block processes the feedback signal to measure a variation of the supply current (IIN) and provide the control signal to adjust the duration of the first time interval.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.