Thermally compensated current sensing of intrinsic power converter elements
USRE42307E1 · kind E1 · reissue
Assignee
Inventors
Key dates
| Filing date | Mar 21, 2007 |
| Grant date | Apr 26, 2011 |
| Priority date | — |
| Expiry date | Mar 21, 2027 |
Classification
- Technology area (CPC —)General
Abstract
A DC-to-DC converter includes one or more power switches, a pulse width modulation circuit for generating control pulses for the power switches, and an output inductor connected to the power switches. A thermally compensated current sensor is connected to an intrinsic current sensing element exhibiting a temperature-based parameter non-linearity. The thermally compensated current sensor has a temperature coefficient that substantially matches a temperature coefficient of an intrinsic power converter element used to measure current flow, thus linearizing the current measurement. Also, a current feedback loop circuit cooperates with the pulse width modulation circuit to control the power switches responsive to the thermally compensated current sensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.