Charge/discharge protection circuit and power-supply unit
US7719235B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 20, 2007 |
| Grant date | May 18, 2010 |
| Priority date | — |
| Expiry date | Nov 15, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J7/00306
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Provided is a charge/discharge protection circuit, which has a simple circuit configuration using a double-throw semiconductor switching device and is capable of recovering from a state where charging/discharging is inhibited with the double-throw semiconductor switching device being turned off. The charge/discharge protection circuit includes a charge/discharge control circuit which is provided with a second terminal for detecting which one of a charger and a load is connected to an external terminal. The second terminal has a first resistor and a first switch connected in series between a power source, and has a second resistor and a second switch connected in series between a ground.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.