L298 current sense resistor

[Wp100]

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]

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

Jeff