SLVUD80 September   2025

 

  1.   1
  2.   Description
  3.   Features
  4. 1DRV8844AEVM PCB
  5. 2Evaluation Module Overview
    1. 2.1 Introduction
    2. 2.2 Kit Contents
    3. 2.3 Specifications
    4. 2.4 Device Information
  6. 3Evaluation Module Operation
    1. 3.1 Input Control
      1. 3.1.1 Brushed-DC Control
    2. 3.2 LEDs
    3. 3.3 EVM Description
    4. 3.4 Power Connections and Ground Planes
    5. 3.5 Test Points
    6. 3.6 Jumpers
    7. 3.7 Power Outputs
  7. 4Hardware Design Files
    1. 4.1 Schematics
    2. 4.2 PCB Layouts
    3. 4.3 Bill of Materials
  8. 5Trademarks

3.1.1 Brushed-DC Control

When driving a brushed-DC motor with the DRV8844AEVM, the motor terminals either needs to be connected across OUT1 to OUT2 or OUT3 to OUT4. While driving a load connect across OUT1 to OUT2, the direction and decay switches are in the same setting. The speed of the motor can then be controlled with CH1 potentiometer.

DRV8844AEVM Brushed-DC Motor Connection Figure 3-2 Brushed-DC Motor Connection

For example, when Channel 1 & Channel 2 FWD and SLOW DECAY are both selected (switches to left position) while a brushed-DC motor is connected across OUT1 to OUT2, then CH1 potentiometer drives a motor in the forward direction switching between a forward drive and slow decay state. The potentiometer varies the duty cycle of the inputs between 0% to 100%.

DRV8844AEVM Input Switch Configuration for Brushed-DC Motor Connection (Forward-Slow Decay) Figure 3-3 Input Switch Configuration for Brushed-DC Motor Connection (Forward-Slow Decay)