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

3.2 LEDs

While using fast or slow decay to drive a load with PWM control, either the INx or ENx input signals uses PWM. To help visualize and eliminate confusion of which signal is using PWM or which is static GPIO, the DRV89644EVM has LEDs associated with each signal. When configured for slow decay, the PWM signal is applied to the INx pin (blue LED) and for fast decay the PWM signal is applied to the ENx pin (green LED). When LED with PWM dims and brighten depending on the duty cycle position of the potentiometer – OFF corresponding to 0% and full brightness corresponding to 100% duty cycle. CLR_FAULT and nSLEEP signals are displayed with yellow LEDs. ON LED corresponds to 3.3V to pin.

DRV8844AEVM Onboard LED Signals Figure 3-4 Onboard LED Signals