Datasheet

TMC2590-EVAL Evaluation Board • Document Revision V1.0 • 2019-AUGUST-16
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Figure 9: CoolStep™ & StallGuard2™ window
The above values activate CoolStep ™ but the values can be fine tuned to make CoolStep ™ work reliable
and in a way as you need it in your application. For that it is important to understand what each setting is
doing.
• Current minimum : The current minimum setting will be the lowest current when CoolStep ™ is
activated. With 1A RMS the current will either be reduced to a quarter or to the half of this current
when no or less force is applied to the motor shaft.
• Current down step : Current down steps defines the speed of the current to drop down after load
gets released from the motor shaft.
• Current up step : This setting defines the step height when hitting the lower StallGuard2 ™ threshold
(Hysteresis start).
• Hysteresis width: This setting defines the area of the StallGuard2™ threshold (Hysteresis end).
• Hysteresis start : This setting defines the switching point, related to the StallGuard2 ™ value, to boost
up the current by one step.
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