Current driver circuit and method of operation therefor
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United States of America Patent
Stats
-
Dec 21, 2010
Grant Date -
Aug 28, 2008
app pub date -
Apr 18, 2005
filing date -
Apr 18, 2005
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A current driver circuit comprises a digital circuitry having a current adjustment function and operably coupled to a current driver for providing a current to a current consuming device. The digital circuitry comprises, or is operably coupled to, a function arranged to determine a load impedance associated with the current consuming device. The current adjustment function varies a current limit applied to the current driver in response to a variation in the load impedance.In this manner, the load impedance (or temperature) of a current consuming device, such as a light bulb, is used to continuously or intermittently adjusting the current limit of a current driver circuit, such as a lamp driver, to minimize the energy dissipated in case of an overload condition.
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