Loss-less load current sensing driver and method therefor
US5959464A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 3, 1996 |
| Grant date | Sep 28, 1999 |
| Priority date | — |
| Expiry date | Sep 3, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2217/0027
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A loss-less load current sensing driver and method includes providing current (603) to a load from a power supply through a transistor. A voltage drop is measured (605) across the transistor responsive to the provision of current to the load. A temperature of the transistor is measured (607) and a temperature-indicating signal is provided. The temperature-indicating signal is translated (609) into a predicted transistor on-resistance. A magnitude of the current provided to the load is determined dependent on the measured voltage drop across the transistor and the predicted transistor on-resistance, preferably by dividing (611) the measured voltage drop by the predicted transistor on-resistance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.