Power supply control apparatus and method suitable for use in an electronic device
US5925942A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 16, 1997 |
| Grant date | Jul 20, 1999 |
| Priority date | — |
| Expiry date | Jul 16, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J7/0036
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A power supply control apparatus (113) for an electronic device (102) includes a terminal (115) to couple to a battery (103), a connector (122) to couple to an external power supply (172), a switch circuit (140) coupled to the terminal (115) and the connector (122), and a controller (108) coupled to the switch circuit (140). The switch circuit (140) connects the terminal (115) to power the electronic device (102) from the terminal (115) when the battery (103) is attached and disconnects the terminal (115) to power the electronic device (102) from the connector (122) when the external power supply (172) is attached. The controller (108) selectively controls the switch circuit (140) to connect the connector (122) to the terminal (115) so as to charge the battery (103) from the external power supply (172).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.