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L298 current sense resistor

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Wp100

Well-Known Member
Hi,

I'm using the L298 H bridge chip to do simple dc motor control and want to include a current monitor using the current sense resistors.
These are typically 0.22 ohms 5watt, but the datasheets clearly state, without reason, that wirewound resistors should not be used ?

Can anyone say why this is so, and if a wirewound resistor was used what effect it would have ?

Here in the UK is virtually impossible to buy such a non wirewound resistor, the only alternative is to parallel a load of smaller carbon rersistors to make up the value / wattage.

thanks
 

jbeng

Member
They're concerned about the inductive effects of wirewound resistors...

Jeff
 
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