LM2596 DC-DC Buck Converter Adjustable Step Down Power Supply Module

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Component Name

Overview

The LM2596 DC-DC Buck Converter Adjustable Step Down Power Supply Module is a high-performance, compact, and adjustable DC-DC power supply module designed for a wide range of applications, including robotics, automation, IoT devices, and battery-powered systems. This module utilizes the LM2596 switching regulator IC from Texas Instruments, which provides high efficiency, reliability, and flexibility.

Functionality

The LM2596 DC-DC Buck Converter Adjustable Step Down Power Supply Module is designed to step down a higher input voltage to a lower output voltage, allowing for efficient power conversion and regulation. The module can accept an input voltage range of 7-35V and provide an adjustable output voltage range of 1.25-30V, making it suitable for a variety of applications.

The module's primary function is to

Regulate the output voltage to a specific level, ensuring stable power supply to the load

Reduce power losses and heat generation, increasing overall system efficiency

Protect the load from input voltage fluctuations and noise

Key Features

Adjustable Output Voltage: The module features an onboard potentiometer, allowing users to adjust the output voltage to their desired level within the specified range.
High Efficiency: The LM2596 Buck Converter IC ensures high efficiency, typically above 90%, reducing power losses and heat generation.
Wide Input Voltage Range: The module can accept input voltages ranging from 7V to 35V, making it suitable for various power sources, including batteries, wall adapters, and solar panels.
Compact Design: The module is designed to be compact and lightweight, making it ideal for space-constrained applications.
Overcurrent Protection: The module features built-in overcurrent protection, which prevents damage to the device in case of excessive current draw.
Short-Circuit Protection: The module includes short-circuit protection, ensuring that the device is protected against short-circuit conditions.
High-Quality Components: The module is built with high-quality components, ensuring reliability and longevity.
Easy to Use: The module requires minimal external components and is easy to integrate into existing systems.

Specifications

Input Voltage Range

7-35V

Output Voltage Range

1.25-30V (adjustable)

Output Current

Up to 3A (dependent on input voltage and output voltage)

Efficiency

Typically above 90%

Operating Frequency

150kHz

Dropout Voltage

1.5V

Operating Temperature Range

-40C to 125C

Dimensions

36mm x 24mm x 14mm (1.42in x 0.94in x 0.55in)

Applications

The LM2596 DC-DC Buck Converter Adjustable Step Down Power Supply Module is suitable for a wide range of applications, including

Robotics and automation systems

IoT devices and sensor networks

Battery-powered systems and wearable devices

Industrial control systems and instrumentation

Telecommunication equipment and networking devices

Conclusion

The LM2596 DC-DC Buck Converter Adjustable Step Down Power Supply Module is a reliable and efficient power supply solution for various applications. Its compact design, high performance, and adjustable output voltage make it an ideal choice for designers and engineers looking to implement a robust power management system.

Pin Configuration

LM2596 DC-DC Buck Converter Adjustable Step Down Power Supply Module Documentation
Pinout Explanation
The LM2596 DC-DC Buck Converter Adjustable Step Down Power Supply Module has a total of 5 pins, which are explained below:
1. VIN (Input Voltage): This is the input voltage pin, which accepts a DC voltage range of 7V to 40V. This pin should be connected to a suitable power source, such as a battery or a wall adapter.
2. VOUT (Output Voltage): This is the output voltage pin, which provides the regulated DC output voltage. The output voltage is adjustable through the trimmer potentiometer (R1) and can be set to a value between 1.25V and 35V.
3. ADJ (Adjust Pin): This pin is connected to the middle pin of the trimmer potentiometer (R1) and is used to adjust the output voltage. It is not intended for direct connection to a power source or a load.
4. GND (Ground): This is the ground pin, which should be connected to the negative terminal of the input power source and the negative terminal of the load.
5. EN (Enable Pin): This pin is used to enable or disable the converter. When the EN pin is connected to GND, the converter is disabled, and when it is connected to VIN, the converter is enabled. Leaving the EN pin unconnected or connecting it to a logic high (e.g., 5V) also enables the converter.
Connection Structure
When connecting the pins, follow the structure below:
Step 1: Input Voltage Connection
Connect the positive terminal of the input power source (7V to 40V) to the VIN pin.
Step 2: Output Voltage Connection
Connect the positive terminal of the load to the VOUT pin.
Step 3: Ground Connection
Connect the negative terminal of the input power source to the GND pin.
Connect the negative terminal of the load to the GND pin.
Step 4: Adjust Output Voltage (Optional)
Connect the middle pin of the trimmer potentiometer (R1) to the ADJ pin.
Adjust the trimmer potentiometer (R1) to set the desired output voltage.
Step 5: Enable the Converter (Optional)
Connect the EN pin to VIN to enable the converter.
Connect the EN pin to GND to disable the converter.
Leave the EN pin unconnected or connect it to a logic high (e.g., 5V) to enable the converter by default.
Important Notes
Make sure to use suitable wiring and components to handle the maximum current output of the converter, which is 3A.
Ensure that the input voltage is within the specified range (7V to 40V) to prevent damage to the converter.
Use a suitable heat sink if the converter is expected to operate at high temperatures or with high currents.

Code Examples

LM2596 DC-DC Buck Converter Adjustable Step Down Power Supply Module

Overview

The LM2596 DC-DC Buck Converter is a high-performance, adjustable step-down power supply module based on the popular LM2596 switching regulator IC. This module is designed to convert higher input voltages (up to 40V) to a lower output voltage (adjustable from 1.5V to 35V) while maintaining high efficiency (up to 92%) and low ripple.

Features

Input voltage: 4V to 40V
 Output voltage: Adjustable from 1.5V to 35V
 Output current: Up to 3A
 High efficiency: Up to 92%
 Low ripple: <50mV
 Overcurrent protection
 Thermal shutdown protection

Pinout

VIN: Input voltage (4V to 40V)
 VOUT: Output voltage (adjustable from 1.5V to 35V)
 GND: Ground
 ADJ: Adjustable output voltage pin
 EN: Enable pin (active low)

Code Examples

Example 1: Basic Use with Arduino

This example demonstrates how to use the LM2596 DC-DC Buck Converter module with an Arduino board to power a 5V device from a 12V power source.

```c++
const int enPin = 2;  // Enable pin connected to digital pin 2

void setup() {
  pinMode(enPin, OUTPUT);
  digitalWrite(enPin, HIGH);  // Enable the module
}

void loop() {
  // The module will output a steady 5V to power the device
}
```

Example 2: Adjustable Output Voltage with Raspberry Pi

This example demonstrates how to use the LM2596 DC-DC Buck Converter module with a Raspberry Pi to adjust the output voltage to power a device that requires a specific voltage.

```python
import RPi.GPIO as GPIO

# Set up the GPIO library
GPIO.setmode(GPIO.BCM)

# Define the enable pin
enPin = 17

# Set up the enable pin as an output
GPIO.setup(enPin, GPIO.OUT)

# Enable the module
GPIO.output(enPin, GPIO.HIGH)

# Adjust the output voltage using the ADJ pin
adjPin = 18
GPIO.setup(adjPin, GPIO.OUT)
GPIO.output(adjPin, GPIO.HIGH)  # Adjust the output voltage to 3.3V

try:
    # The module will output the adjusted voltage (3.3V) to power the device
    while True:
        pass
except KeyboardInterrupt:
    # Disable the module when finished
    GPIO.output(enPin, GPIO.LOW)
    GPIO.cleanup()
```

Example 3: Overcurrent Protection Demonstration

This example demonstrates how to use the LM2596 DC-DC Buck Converter module's overcurrent protection feature.

```c++
const int enPin = 2;  // Enable pin connected to digital pin 2
const int ledPin = 13;  // LED connected to digital pin 13

void setup() {
  pinMode(enPin, OUTPUT);
  pinMode(ledPin, OUTPUT);
  digitalWrite(enPin, HIGH);  // Enable the module
}

void loop() {
  digitalWrite(ledPin, HIGH);  // Turn on the LED

// Simulate an overcurrent condition by short-circuiting the output
  pinMode(VOUT, OUTPUT);
  digitalWrite(VOUT, LOW);

delay(1000);  // Wait for the module to detect the overcurrent condition

digitalWrite(enPin, LOW);  // Disable the module
  digitalWrite(ledPin, LOW);  // Turn off the LED
  delay(1000);  // Wait before re-enabling the module
}
```

In this example, the module will automatically shut down when an overcurrent condition is detected, and the LED will turn off. After a 1-second delay, the module will be re-enabled, and the LED will turn back on.