The TMC2660 provides a high power density, therefore, careful thermal management is a must. In order to ensure safe long-term operation, the device should, under normal conditions, not heat up to more than 125°C. In worst case conditions, up to 150°C is safe. The thermal conditions in standstill are more critical, depending on the microstep position, where the standstill occurs, a single coil might carry a peak current identical to the device peak current. This condition may not persist to ensure thermal conditions. Therefore the standstill current must be reduced to 70% of the RMS current or less. In most applications, a reduction to much less than 50% of the run current is sensible, because often holding torque requirements are relaxed. This will save a lot of energy.