BTS7960 43A Dual H‑Bridge Motor Driver User’s Guide

Overview

The BTS7960 module is a high‑power motor driver based on Infineon’s BTS7960 half‑bridge chips. It’s designed to control large DC motors with PWM speed control and bidirectional drive.

• Voltage range: 6 V – 27 V
• Peak current: up to 43 A (continuous ~20–25 A with cooling)
• Logic level: 5 V (Arduino, STM32, ESP32 compatible)
• Applications: robotics, e‑mobility, pumps, actuators, heavy DC loads

Pinout & Connections

Control Logic

• Forward motion:
  • RPWM = PWM signal
  • LPWM = LOW
• Reverse motion:
  • LPWM = PWM signal
  • RPWM = LOW
• Stop:
  • Both PWM inputs LOW
• Enable pins:
  • Keep R_EN and L_EN HIGH for normal operation

Example Arduino Wiring

int RPWM = 9;   // Forward PWM pin
int LPWM = 10;  // Reverse PWM pin
int REN  = 7;   // Right enable
int LEN  = 8;   // Left enable

void setup() {
  pinMode(RPWM, OUTPUT);
  pinMode(LPWM, OUTPUT);
  pinMode(REN, OUTPUT);
  pinMode(LEN, OUTPUT);
  digitalWrite(REN, HIGH);
  digitalWrite(LEN, HIGH);
}

void loop() {
  // Forward at 50% speed
  analogWrite(RPWM, 128);
  analogWrite(LPWM, 0);
  delay(2000);

  // Reverse at 75% speed
  analogWrite(RPWM, 0);
  analogWrite(LPWM, 192);
  delay(2000);

  // Stop
  analogWrite(RPWM, 0);
  analogWrite(LPWM, 0);
  delay(2000);
}

Applications

• Heavy robotics (drive motors, tracked vehicles)
• Electric scooters or carts (with proper safety circuits)
• Industrial pumps, fans, actuators
• High‑power DC motor experiments

Best Practices

• Cooling: Always use a heatsink/fan for >20 A loads.
• Power supply: Ensure motor supply can handle surge currents.
• Wiring: Use thick gauge wires for motor terminals.
• Protection: Add fuses or circuit breakers for safety.
• Not for steppers: Despite “stepper” in some listings, this module is not suitable for precise stepper motor control. It’s for brushed DC motors.