The OKY3907 is a stepper motor controller manufactured by OKYSTAR, and features a TMC2100 controller with a 1.7A current output and a 4.75 to 46V input voltage range. It has an integrated driver, and is designed to provide superior motor control and torque response in demanding applications. Its advanced design provides smooth torque and speed transitions, reducing noise and vibration and increasing servo responsiveness. It is used in a wide variety of applications, such as industrial automation, consumer electronics, medical equipment, and robotics.