Current sensing circuit and switching regulator including the same
US8368363B2 · kind B2 · utility
10Cited by
15References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 14, 2009 |
| Grant date | Feb 5, 2013 |
| Priority date | — |
| Expiry date | Dec 12, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/0009
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A current sensing circuit configured to sense current flowing through a switching transistor of a non-insulated switching regulator, the current sensing circuit includes a voltage divider circuit portion; a first transistor; a first impedance element; a second transistor; a third transistor; and a first voltage comparing circuit portion, wherein control terminals of the first transistor, the second transistor, and the third transistor are connected to each other and a connecting portion of the control terminals is connected to a connecting portion between the third transistor and the first constant current source.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.