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DRV10970: Range of current in which the current limit equation holds good

Avish Gupta
Intellectual 470 points
Part Number: DRV10970
Other Parts Discussed in Thread: DRV11873

Dear Sir,

The current limit in DRV10970 used to limit the motor phase current during application is controlled by connecting an external resistor to the CS pin (PIN 17). As per the data sheet, the current limit follows the equation: 

Ilimit=(VILIM_THR *ACL )/RCS

where Ilimit is the current limit VILIM_THR is the voltage threshold which has a fixed maximum value of 1.25V and ACL is the constant current limit attenuator factor which has a maximum value as 28000 A/A and RCS is the external resistor which can be changed to control the current limit. However, there is no mention of the range of current in which this equation holds good. The data sheet of DRV11873 mentions that  the current limit equation holds good only for the range 500mA to 2A.

Is there such a limit for DRV10970 as well? What is the range of current in which the equation holds good?

Datasheet Links:

DRV10970: http://www.ti.com/lit/ds/symlink/drv10970.pdf

DRV11873: http://www.ti.com/lit/ds/symlink/drv11873.pdf