For StepStick and Pololu A4988 compatible hardware Drive capability up to 1.7A (RMS) continuous coil current -2.8A peak Step / Dir interface with microstep interpolation (up to 256 microsteps) Configure via CFG pin or UART interface stealthChop2-for quiet operation and smooth motion Extended period-high dynamic motor control chopper (available through UART, OTP, CFG pins Enable) coolStep-current control to save energy Stall Guard4-sensorless motor load detection TMC2209 is an ultra-quiet motor driver IC for two-phase stepper motors. TMC2209 is pin compatible with many traditional drivers and TMC2208. TRINAMICs' advanced StealthChop2 chopper ensures noise-free operation of the motor, achieving high efficiency and motor torque. Its combination of fast current regulation and resonance suppression function can achieve high dynamic movement. StallGuard is used to return to the origin without sensor to prevent stalling. The built-in power MOSFET can handle motor currents up to 2A RMS, with protection and diagnostic functions, and stable and reliable operation. An easy-to-use UART interface opens up tuning and control options. Store application tuning in OTP memory. The drive can be set for noise-free operation and very precise operation through a separate pulse direction, thereby achieving a cost-effective and highly competitive solution Colour:Blue+white Material:plastic Size:2.01x1.51cm Package Contents: 5 x TMC2209 V3.0 5 x radiator Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.