SLOU571 June   2024

 

  1.   1
  2.   Description
  3.   Get Started
  4.   Features
  5.   Applications
  6.   6
  7. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  8. 2Hardware
    1. 2.1 EVM Setup and Mode Select
      1. 2.1.1 Jumpers
      2. 2.1.2 DRV8421A: Brushed-DC Setup
      3. 2.1.3 DRV8421A: Stepper Setup
      4. 2.1.4 DRV8421B: Brushed-DC Setup
      5. 2.1.5 DRV8421B: Stepper Setup
      6. 2.1.6 EVM Control
        1. 2.1.6.1 DRV8421A: Brushed-DC Motor Control
        2. 2.1.6.2 DRV8421A: Stepper Motor Control
        3. 2.1.6.3 DRV8421B: Brushed-DC Motor Control
        4. 2.1.6.4 DRV8421B: Stepper Motor Control
      7. 2.1.7 Parallel Mode
        1. 2.1.7.1 DRV8421A: Parallel Mode
        2. 2.1.7.2 DRV8421B: Parallel Mode
      8. 2.1.8 Removing and Installing Supported Motor Drivers
  9. 3Hardware Design Files
    1. 3.1 Schematics
    2. 3.2 PCB (Top-Assembly View)
    3. 3.3 Bill of Materials (BOM)
  10. 4Additional Information
    1. 4.1 Trademarks

2.1.7.2 DRV8421B: Parallel Mode

The two H-bridges can be used in parallel to deliver twice the current to a single motor. For the DRV8421B, the 2-wire version, parallel mode operation can be achieved by taking the following steps:

  1. IN1 and IN2 must be tied together
    1. Remove third jumper from the top from jumper (J7)
    2. Use this jumper to populate jumper (J11)
  2. OUT1 and OUT3 must be tied together
    1. Use external wire connections
  3. OUT2 and OUT4 must be tied together
    1. Use external wire connections

While in parallel mode, the speed adjust comes from the MCU Ctrl 1 input potentiometer.

DRV8421AEVM, DRV8421BEVM Parallel Mode Operation with DRV8421B Figure 2-14 Parallel Mode Operation with DRV8421B