BTS7960B 43A H-Bridge Motor Driver

BTS7960B 43A H-Bridge Motor Driver Documentation

Overview

The BTS7960B is a high-current, high-performance H-bridge motor driver IC designed for driving DC motors, solenoids, and other inductive loads. It is capable of handling high currents up to 43A and is suitable for use in a wide range of applications, including robotics, electric vehicles, and industrial automation.

Pinout and Functional Description

The BTS7960B has a 24-pin package and the following pinout:

VCC (pins 1, 24): Power supply voltage (5V to 27V)
 GND (pins 2, 3, 4, 23): Ground
 IN1 (pin 5), IN2 (pin 6): Input control signals (logic level)
 EN (pin 7): Enable input (active high)
 RBOOT (pin 8): Bootstrap diode connection
 LB (pin 9), HB (pin 10): Low-side and high-side driver outputs
 SENSE (pin 11): Current sense output
 VSENSE (pin 12): Voltage sense input
 THERMAL (pin 13): Overtemperature detection output
 DIAG (pin 14): Diagnostic output
 NC (pins 15-22): No connection

Example Code

### Example 1: Basic Motor Control with Arduino

This example demonstrates how to use the BTS7960B to control a DC motor using an Arduino board.

```cpp
const int IN1 = 2;  // Input control signal 1
const int IN2 = 3;  // Input control signal 2
const int EN = 4;   // Enable input

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

void loop() {
  // Forward direction
  digitalWrite(IN1, HIGH);
  digitalWrite(IN2, LOW);
  digitalWrite(EN, HIGH);
  delay(1000);

// Reverse direction
  digitalWrite(IN1, LOW);
  digitalWrite(IN2, HIGH);
  digitalWrite(EN, HIGH);
  delay(1000);

// Stop motor
  digitalWrite(EN, LOW);
  delay(1000);
}
```

### Example 2: PWM Motor Control with ESP32

This example demonstrates how to use the BTS7960B to control a DC motor using Pulse Width Modulation (PWM) with an ESP32 board.

```cpp
const int IN1 = 18;  // Input control signal 1
const int IN2 = 19;  // Input control signal 2
const int EN = 23;   // Enable input
const int PWM_CHANNEL = 0;  // PWM channel

void setup() {
  pinMode(IN1, OUTPUT);
  pinMode(IN2, OUTPUT);
  pinMode(EN, OUTPUT);
  ledcSetup(PWM_CHANNEL, 5000, 10);  // Set up PWM channel
  ledcAttachPin(EN, PWM_CHANNEL);  // Attach PWM channel to enable pin
}

void loop() {
  // Set motor speed using PWM
  ledcWrite(PWM_CHANNEL, 512);  // 50% duty cycle
  digitalWrite(IN1, HIGH);
  digitalWrite(IN2, LOW);
  delay(1000);

ledcWrite(PWM_CHANNEL, 1023);  // 100% duty cycle
  digitalWrite(IN1, HIGH);
  digitalWrite(IN2, LOW);
  delay(1000);

ledcWrite(PWM_CHANNEL, 0);  // 0% duty cycle (stop motor)
  digitalWrite(IN1, LOW);
  digitalWrite(IN2, LOW);
  delay(1000);
}
```

### Example 3: Current Sensing and Overcurrent Protection with Raspberry Pi

This example demonstrates how to use the BTS7960B's current sense output to monitor motor current and implement overcurrent protection using a Raspberry Pi.

```python
import RPi.GPIO as GPIO
import time

GPIO.setmode(GPIO.BCM)

IN1 = 17  # Input control signal 1
IN2 = 23  # Input control signal 2
EN = 24  # Enable input
SENSE = 25  # Current sense output

GPIO.setup(IN1, GPIO.OUT)
GPIO.setup(IN2, GPIO.OUT)
GPIO.setup(EN, GPIO.OUT)
GPIO.setup(SENSE, GPIO.IN)

def read_current_sense():
  # Read current sense output (approx. 100mV/A)
  current = (GPIO.input(SENSE)  3.3) / 100
  return current

while True:
  # Set motor direction and enable
  GPIO.output(IN1, GPIO.HIGH)
  GPIO.output(IN2, GPIO.LOW)
  GPIO.output(EN, GPIO.HIGH)

# Monitor motor current
  current = read_current_sense()
  if current > 10:  # Overcurrent threshold (10A)
    print("Overcurrent detected! Stopping motor.")
    GPIO.output(EN, GPIO.LOW)
    time.sleep(1)
  else:
    print("Motor current:", current, "A")

time.sleep(0.1)
```

Notes and Considerations

The BTS7960B requires a bootstrap capacitor (typically 100nF to 1uF) connected between the RBOOT pin and the high-side driver output (HB) to ensure proper operation.
 The EN input should be driven high to enable the motor driver. Driving it low will disable the driver and shut down the motor.
 The current sense output (SENSE) can be used to monitor motor current and implement overcurrent protection. The output voltage is approximately 100mV/A.
 The BTS7960B has built-in overtemperature protection, which can be monitored using the THERMAL output. When the junction temperature exceeds 170C, the THERMAL output will go low.
 Always follow proper PCB design and layout guidelines to ensure reliable operation and minimize electromagnetic interference (EMI).
 Consult the datasheet and application notes for more detailed information on using the BTS7960B in your specific application.