Technical part 3.0 : Motor Driver of stepper motor

Motor Driver of stepper motor, SD02B

SD02B is designed to drive unipolar or bipolar stepper motor. The board incorporates most of the components of the typical applications. With minimum interface, the board is ready to Plug and Play. Simply add in power and a few push buttons, this driver is ready to drive unipolar or bipolar stepper motor. SD02B will actually drive stepper motor in bipolar method. However, since unipolar stepper motor can also be used as bi-polar stepper motor, thus this driver can be used to drive both unipolar and bipolar stepper motor. This stepper motor driver has been designed with capabilities and features of:

• Now comes with UART interface for easier communication between the user’s circuit and SD02B. By using the new UART control, user can

-On/Off, Run/Brake and change motor’s rotation direction
-Set motor speed
-Request for encoder value
-Track an encoder value and brake the motor
-Set new baud rate for the driver

• Support up to 2A per phase
• Smoother stepper motor rotation with 2/5/10 micro-stepping feature
• Able to drive stepper motor from 3V to 40V.
• 8V to 24V compatible for driver circuit supply voltage
• 5V logic level compatible inputs.
• Maximum speed up to 1000 steps per second or 1KHz pulses
• Enable/Disable pin for low power consumption mode.
• Heat sink with fan for fast thermal release

Circuit diagram of motor driver and stepper motor