... current 2A,Maximum working voltage 30V, 2-phase driver. Stepper motor driver,High performance, low priceRB2303 is a microstep driver, voltage ... 28mm-42mm. Owe to bipolar constant current chopping circuit, the motor can run smoothly and hardly has any noise;Rising the ... greatly improve high speed performance and output torque of the motor. Once the pulse stops for 300ms,the phase current will ...