Shop name:Chong Qing Shuo Yue Ke Ji You Xian Gong Si For StepStick and Pololu A4988 hardware Drive capability up to 1.7A () continuous coil current -2.8A Step / Dir interface with microstep interpolation (up to 256 microsteps) Configure via pin or UART interface stealthChop2-for quiet operation and smooth motion Extended period-high dynamic motor control chopper (available through UART, OTP, 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 with many drivers and TMC2208. TRINAMICs' advanced StealthChop2 chopper ensures noise-free operation of the motor, achieving high efficiency and motor torque. 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 -in MOSFET can handle motor currents up to 2A , with protection and diagnostic functions, and stable and reliable operation. An easy-to- UART interface opens up tuning and control . Store application tuning in OTP memory. can be set for noise-free operation and very precise operation through a separate 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 and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.