Unipolar Stepper Motor Controller With UCN5804B

Monday, October 8th, 2018 - Motor Circuit

The circuit of unipolar stepper motor controller with UCN5804B is very simple because it uses a specially designed IC UCN5804B as unipolar stepper motor driver. The circuit controller or stepper motor driver is said to be very simple because it only requires 2 inputs are inputs control the direction of the play with this logic HIGH and LOW (Direct) and Input speed rotation step (Step) with a TTL pulse. In addition a circuit of stepper motor controller only uses 2 external components, namely R1 and R2 which serves as a current-limiting. Working voltage UCN5804B stepper motor driver IC is a DC voltage of +5 volts and can control stepper motors with a working voltage of +5 volts to +20 volts DC. Circuit UCN5804B unipolar stepper motor controller can be used to control a stepper motor with input cable 5, 6 and 8 line. For stepper motors with line input cable 5, the common line can be branched into 2 lines, while for stepper motors with 8 line input cable, the common line can be combined 2 lines before being connected to the controller circuit. To create a circuit of unipolar stepper motor controller with UCN5804B circuit schematic can be seen as follows.

The Circuit of Unipolar Stepper Motor Controller With UCN5804B

Unipolar Stepper Motor Controller With UCN5804B

Feature Unipolar Stepper Motor Controller With UCN5804B

IC UNC5804B the unipolar stepper motor controller circuit above has many features as follows:

  • Maximum current of 1.5 Ampere
  • Maximum motor voltage 35 volts
  • Can be configured in Wave-Drive, Two-Phase and Half Step Formats
  • Equipped clamper diodes in chip
  • The output can be controlled
  • 2 line inputs
  • Power On reset
  • Internal thermal shutdown

Configuration Unipolar Stepper Motor Controller With UCN5804B

To select the working configuration of the unipolar stepper motor controller with UCN5804B This can be done with the configuration of pin 9 and pin 10 as follows:

Configuration Options Pin 9 Pin 10
Wave-Drive GND GND
Two-phase 5V GND
Half Step Formats GND 5V

R1 and R2 on the circuit controller or stepper motor driver IC UCN5804B above serves as a current limiter, which is the maximum current of 1.5 amperes. So the value of this resistor is determined or adapted to the working voltage used for stepper motor controlled by a circuit of unipolar stepper motor controller with UCN5804B.

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