[SOLVED] L298 Rs(current sensing resister) value calculation

[Ranbeer Singh]

I want to run a 12v 3A BLDC motor with L298 chip. I am not understanding what means of Rs and How to calculate it's value.

 

[FvM]

Rs has no meaning for L298 itself. It will be used in constant current control, e.g. in combination with L297. Read the datasheet.

The Rs resistance values value has two implications:
- power dissipation I²Rs
- suitable input voltage range of the current comparator in L297 or similar circuit

 

[Ranbeer Singh]

how calculate it. I have a 12v 3a bldc motor.

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Datasheet says 'Rr and Rsense depend from the load current'