SLVA767A September   2016  – December 2016 SN75469 , TPL7407L , TPL9201 , ULN2003A , ULN2003B , ULN2003V12 , ULN2004A , ULQ2003A , ULQ2003A-Q1 , ULQ2004A , ULQ2004A-Q1

 

  1.   Stepper Motor Driving With Peripheral Drivers (Driver ICs)
    1.     Trademarks
    2. 1 Peripheral Driver (Driver IC) Overview
    3. 2 Stepper Motors
      1. 2.1 Unipolar Stepper Motors
      2. 2.2 Bipolar Stepper Motors
    4. 3 Stepper Motor Driving Overview
      1. 3.1 Unipolar Stepper Motor Driving Block Diagram
      2. 3.2 Detailed Design Considerations
      3. 3.3 Bipolar Stepper Motor Driving Block Diagram
      4. 3.4 Detailed Design Considerations
    5. 4 Stepper Motor Driving Patterns
      1. 4.1 Wave Drive Operation
      2. 4.2 Full-Step Operation
      3. 4.3 Half-Step Operation

3.4 Detailed Design Considerations

When using a peripheral driver for stepper motor driving applications there are a few design considerations that should be highlighted.

  1. VCC1 and VCC2 should be within the acceptable recommended voltage range - see device Electrical Characteristics for further information.
  2. Logic Inputs should be within the acceptable recommended voltage range - see device Electrical Characteristics for further information.
  3. The current through each motor phase (Iphase) is a function of the high-level output voltage (VOH), the low-level output voltage (VOL) and the phase resistance (Rphase)
    • Equation 2 provides the equation for the Relay Current
    • See device Electrical Characteristics for the maximum allowable continuous output current per channel (IO), high-level output voltage (VOH), and low-level output voltage (VOL)
      • Equation 2. BipolarMotorDriver-Equation.gif