15A Single DC Motor Driver wiki-DFRobot

Introduction

This is an ultra small DC motor driver for small scale projects using the popular IC - LM2575. This provides a powerful way to drive 36V @ 15A motors. UVLO (Under Voltage Latch-Out) features a safe guard for your system. It is very considerate to own an 5V output for Arduino or any other devices, and its interface includes ESD (electro-static discharge) protection.

Specification

• Voltage supply: DC 12 ~ 36 V
• Voltage supply limit: 6.5 ~ 40 V
• Control signal Level (Compatible 3.3V/5V)
  • High: DC 2.0 ~ 5.5 V
  • Low: DC0 ~ 0.8 V
• Maximum continuous operating current:
  • 12A (no heat sink)
  • 15A (with simple heat sink)
  • 20A (with Thick Heat Sink/ Cooling System)
• Peak current: 110 A
• Speed control: PWM
  • Minimum valid Pulse Width: 200 ns
• Maximum Output Current @5V: 500 mA
• Working Temperature: -25 ~ 85 °C
• Mounting Hole: M3
• Dimension (Length * Width * Height): 55 x 55 x 20(mm)/2.165 x 2.165 x 0.787 (in)
• Weight: 42g

Board Overview

Control Method

In this table

• "0": TTL_Low

• "1": TTL_High

• "PWM": PWM speed setting

• "x": Any TTL, and it is default TTL_Low while no PWM signal.

  Note1: IN1 & IN2 To protect your motor, before switching the motor steering direction, make sure firstly to BRAKE motor by setting IN1 - 0 & IN2 - 0, especially when the PWM was set as 100%, full speed. And the suggestion time to brake is >0.1S, depending on your motor.

Tutorial

Here you will learn how to use PWM signal to control the motor through this motor driver, do some wiring according to the Connection Diagram below, and then upload the sample code below to the Arduino card, here we use a UNO as the controller, you could see your motor run forward for 3 second and then run reversely for another 3 seconds and repeat this behavior then.

This tutorial will cover how to use PWM to control a motor using the shield.

Requirements

• Hardware
  • 1 x DFRduino UNO (or similar)
  • 1 x DC Motor Driver
  • 1 x DC Motor
  • 1 x Fuse@20A
  • Jumper wires

• Software
  • Arduino IDE Click to Download Arduino IDE from Arduino®.

Connection Diagram

Facility Safety and the Personal Safety: Please add a fuse@20A between the Power source and the module (9-36V). The 5VO port is for 5V output for other module, can NOT be used as Power_In.

Installation Tips The module needs a cooling system once your motor runs over 15 amps, like Electronics Blower Fan, Heatsink, etc. The backside of the driver, as right-hand picture shows, that its conducting layer can be very wide, so you should take some measurements to ensure it won't short-circuit, like applying 1mm layer conductive epoxy or any other similar materials.

Important: Pluggable Connector You may find that the connector is designed as pluggable type to adapt with Male or Female wires.

Sample Code

/*
* @file Motor driver DRI0042_Test.ino
* @brief DRI0042_Test.ino  Motor control program
*
* control motor positive inversion
*
* @author bernie.chen@dfrobot.com
* @version  V1.0
* @date  2016-8-10
*/
const int IN1=5;
const int IN2=4;
const int PWM=6;

void setup() {
     pinMode(IN1, OUTPUT);
     pinMode(IN2, OUTPUT);
     pinMode(PWM, OUTPUT);
}

void loop() {
 Motor_Brake();
 delay(100);
 Motor_Forward(200);//Forward, PWM setting 0-255
 delay(3000);
 Motor_Brake();
 delay(100);
 Motor_Backward(200);//Reverse, PWM setting 0-255
 delay(3000);
}

void Motor_Forward(int Speed) {
     digitalWrite(IN1,HIGH);
     digitalWrite(IN2,LOW);
     analogWrite(PWM,Speed);
}

void Motor_Backward(int Speed) {
     digitalWrite(IN1,LOW);
     digitalWrite(IN2,HIGH);
     analogWrite(PWM,Speed);
}

void Motor_Brake(){
     digitalWrite(IN1,LOW);
     digitalWrite(IN2,LOW);
}

FAQ

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