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Re: Jaguar current sensing technical details?
Marshall,
Part of the answer to your questions above, Luminary Micro was not a part of TI when the Jag was under development. The series resistance also affects the max current that the bridge is capable of delivering to the load. Raising the value of the sense resistor opposes the lower "ON" resistance FETs that were chosen for this design.
In the case of the Tan Jags, high current on a CIM (say 100amps) develops a significant amount of power in the sense resistor. It is a 2 watt resistor trying to dissipate 5 watts. In sustained pushing matches, the resistor heats up a lot and in some cases desoldered itself from the board.
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Good Luck All. Learn something new, everyday!
Al
WB9UVJ
www.wildstang.org
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Storming the Tower since 1996.
Last edited by Al Skierkiewicz : 06-01-2011 at 08:02.
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