How to Use DC-DC Buck-Mode Power Module (8~28V to 5V 1.6A): Examples, Pinouts, and Specs

Introduction

The DC-DC Buck-Mode Power Module (DFR0571), manufactured by DFRobot, is a compact and efficient step-down voltage regulator. It converts a higher input voltage (ranging from 8V to 28V) to a stable 5V output, capable of delivering up to 1.6A of current. This module is ideal for powering low-voltage devices such as microcontrollers, sensors, and other 5V-compatible electronics.

Explore Projects Built with DC-DC Buck-Mode Power Module (8~28V to 5V 1.6A)

Use Cirkit Designer to design, explore, and prototype these projects online. Some projects support real-time simulation. Click "Open Project" to start designing instantly!

Battery-Powered DC-DC Converter System for Multi-Voltage Power Distribution

This circuit converts a 38.5V battery output to multiple lower voltage levels using a series of DC-DC converters and a power module. It includes an emergency stop switch for safety and distributes power to various components such as a relay module, USB ports, and a bus servo adaptor.

Open Project in Cirkit Designer

Multi-Stage Voltage Regulation and Indicator LED Circuit

This circuit is designed for power management, featuring buck and boost converters for voltage adjustment, and linear regulators for stable voltage output. It includes LEDs for status indication, and terminal blocks for external connections.

Open Project in Cirkit Designer

DC-DC Converter and Relay Module Power Distribution System

This circuit consists of a DC-DC converter powering a 6-channel power module, which in turn supplies 5V to a 2-relay module. The power module distributes the converted voltage to the relay module, enabling it to control external devices.

Open Project in Cirkit Designer

Battery-Powered 18650 Li-ion Charger with USB Output and Adjustable Voltage Regulator

This circuit is a battery management and power supply system that uses three 3.7V batteries connected to a 3S 10A Li-ion 18650 Charger Protection Board Module for balanced charging and protection. The system includes a TP4056 Battery Charging Protection Module for additional charging safety, a Step Up Boost Power Converter to regulate and boost the voltage, and a USB regulator to provide a stable 5V output, controlled by a push switch.

Open Project in Cirkit Designer

Common Applications

• Powering microcontrollers like Arduino, Raspberry Pi, or ESP32.
• Supplying stable 5V power to sensors, relays, and other peripherals.
• Battery-powered systems requiring efficient voltage regulation.
• Automotive electronics where 12V or 24V systems need to power 5V devices.

Technical Specifications

Below are the key technical details of the DFR0571 module:

Pin Configuration and Descriptions

The module has three main pins for input and output connections:

Usage Instructions

How to Use the Component in a Circuit

1. Connect Input Voltage:

   • Connect the positive terminal of your power source (8V to 28V) to the VIN pin.
   • Connect the negative terminal of your power source to the GND pin.

2. Connect Output Load:

   • Connect the VOUT pin to the positive terminal of your 5V device or load.
   • Connect the GND pin to the ground of your load.

3. Verify Connections:

   • Double-check all connections to ensure proper polarity and avoid short circuits.

4. Power On:

   • Turn on the power source. The module will regulate the input voltage to a stable 5V output.

Important Considerations and Best Practices

• Input Voltage Range: Ensure the input voltage is within the specified range (8V to 28V). Exceeding this range may damage the module.
• Heat Dissipation: Although the module is highly efficient, prolonged operation at maximum current (1.6A) may generate heat. Ensure adequate ventilation or consider adding a heatsink if necessary.
• Polarity Protection: The module does not have built-in reverse polarity protection. Always connect the input voltage with the correct polarity.
• Load Requirements: Do not exceed the maximum output current of 1.6A to prevent damage to the module or connected devices.

Example: Using with Arduino UNO

The DFR0571 module can be used to power an Arduino UNO from a 12V power source. Below is an example circuit and Arduino code:

Circuit Connections

• Connect the 12V power source to the VIN and GND pins of the module.
• Connect the VOUT pin of the module to the 5V pin of the Arduino UNO.
• Connect the GND pin of the module to the GND pin of the Arduino UNO.

Arduino Code Example

// Example code to blink an LED connected to pin 13 of Arduino UNO
// Ensure the Arduino is powered via the DFR0571 module

void setup() {
  pinMode(13, OUTPUT); // Set pin 13 as an output
}

void loop() {
  digitalWrite(13, HIGH); // Turn the LED on
  delay(1000);            // Wait for 1 second
  digitalWrite(13, LOW);  // Turn the LED off
  delay(1000);            // Wait for 1 second
}

Troubleshooting and FAQs

Common Issues and Solutions

1. No Output Voltage:

   • Cause: Input voltage is below 8V or connections are incorrect.
   • Solution: Verify that the input voltage is within the 8V to 28V range and check all connections.

2. Overheating:

   • Cause: Module is operating at maximum current (1.6A) for extended periods or poor ventilation.
   • Solution: Improve ventilation or add a heatsink to the module.

3. Output Voltage Fluctuations:

   • Cause: Input voltage is unstable or load exceeds 1.6A.
   • Solution: Use a stable power source and ensure the load does not exceed the module's current rating.

4. Module Not Working After Connection:

   • Cause: Reverse polarity or input voltage exceeded 28V.
   • Solution: Check polarity before connecting and ensure the input voltage is within the specified range.

FAQs

Q1: Can this module be used to power a Raspberry Pi?
A1: Yes, the module can power a Raspberry Pi, but ensure the total current draw (including peripherals) does not exceed 1.6A.

Q2: Does the module have short-circuit protection?
A2: No, the module does not have built-in short-circuit protection. Use external protection if needed.

Q3: Can I adjust the output voltage?
A3: No, the output voltage is fixed at 5V and cannot be adjusted.

Q4: Is the module suitable for automotive applications?
A4: Yes, the module can be used in automotive applications, as it supports input voltages up to 28V, commonly found in 12V and 24V systems.