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

1.3 Specification

The DRV8421xEVM is preprogrammed with firmware for quick and easy evaluation. An onboard eZ-FET header is available to connect an external debugger for reprogramming or debugging purposes but is not required for normal operation. A 3.3V LDO generates a 3.3V rail from the VM power supply. This 3.3V is used to power the MSP430, and motor driver EN pin on the DRV8421B. Signal header J7 uses removable shunts to pass the signals from the MCU to the motor driver. Remove any of these shunts to easily jump in the control signals to the driver. Provide an external motor power supply to the J4 screw terminal within the operating range of the device. An optional power jack (J8) can be used instead of the screw terminal (J4) for convenience; however, only one power supply must be used at a time. The DRV8421 supports 4V to 18V supply voltage range.