How to Use HLK-5M05B: Examples, Pinouts, and Specs

The HLK-5M05B is a compact and efficient AC-DC power module manufactured by Hi-Link. It is designed to convert an input voltage range of 85-265V AC into a stable 5V DC output, delivering up to 5W of power. This module is widely used in applications requiring reliable and space-saving power solutions, such as IoT devices, home automation systems, industrial control systems, and embedded electronics.

• Powering microcontrollers (e.g., Arduino, ESP32, Raspberry Pi peripherals)
• IoT devices and smart home systems
• Industrial automation and control circuits
• Consumer electronics
• LED lighting systems

The HLK-5M05B is designed to meet the needs of modern electronic systems with its compact size, high efficiency, and robust protection features.

The HLK-5M05B has a total of 4 pins for input and output connections. Below is the pinout description:

The HLK-5M05B is straightforward to use in electronic circuits. Follow the steps below to integrate it into your design:

1. Input Connection:

   • Connect the AC IN (L) pin to the live wire of the AC power source.
   • Connect the AC IN (N) pin to the neutral wire of the AC power source.
   • Ensure proper insulation and safety precautions when handling AC connections.

2. Output Connection:

   • Connect the DC OUT (+) pin to the positive rail of your circuit.
   • Connect the DC OUT (-) pin to the ground rail of your circuit.

3. Mounting:

   • Secure the module on a PCB or enclosure using appropriate mounting techniques.
   • Ensure adequate spacing around the module for heat dissipation.

4. Testing:

   • Power on the AC source and measure the output voltage using a multimeter to confirm a stable 5V DC output.

• Safety: Always handle the module with care when working with high-voltage AC inputs. Use proper insulation and avoid touching live connections.
• Heat Dissipation: Although the module is efficient, ensure adequate ventilation or heat sinking if used in high-temperature environments.
• Load Requirements: Do not exceed the maximum output current of 1A to avoid damage to the module.
• Filtering: For sensitive applications, consider adding external capacitors or filters to reduce noise on the output.

The HLK-5M05B can be used to power an Arduino UNO directly. Below is an example circuit and code:

1. Connect the AC IN (L) and AC IN (N) pins to the AC mains (use proper insulation).
2. Connect the DC OUT (+) pin to the Arduino's 5V pin.
3. Connect the DC OUT (-) pin to the Arduino's GND pin.

// Example code to blink an LED using Arduino UNO powered by HLK-5M05B
// Ensure the HLK-5M05B is properly connected to the Arduino's 5V and GND pins.

const int ledPin = 13; // Pin connected to the onboard LED

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

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

1. Can the HLK-5M05B be used with a 12V DC input?

   • No, the module is designed for AC input only (85-265V AC).

2. Is the module safe for use in consumer electronics?

   • Yes, the HLK-5M05B complies with CE and RoHS safety standards.

3. What happens if the load exceeds 1A?

   • The module has built-in overcurrent protection and will shut down to prevent damage.

4. Can I use the HLK-5M05B in outdoor applications?

   • The module is not waterproof. Use it in a sealed, weatherproof enclosure for outdoor use.

By following this documentation, you can safely and effectively integrate the HLK-5M05B into your electronic projects.