Product Name: BIGTREETECH (BTT) TMC2209 V1.3 Item Type: Stepper Motor Driver Current: 2.0 Motor Voltage: 5.5...28V Logic Voltage: 3.3...5V Coil Current: 2.8A Peak Interface: Step/DIR /UART Extra Function: CoolStep and stallGuard he Flexible microPlyer interpolation unit can provide 256 microsteps. Stallguard4™ locked-motor test can provide an abnormal signal when the motor rotates abnormally. CoolStep™ current dynamic control can save 75% energy.