How to Use HLK-5M05: Examples, Pinouts, and Specs

The HLK-5M05 is a compact and efficient AC-DC power module designed to convert a wide input voltage range of 85-265V AC into a stable 5V DC output. With a maximum power output of 5W, this module is ideal for powering low-power electronic devices and embedded systems. Its small form factor and high reliability make it a popular choice for applications requiring a compact and efficient power supply solution.

• IoT devices and smart home systems
• Embedded systems and microcontroller-based projects
• Industrial control equipment
• Consumer electronics
• LED lighting systems

The HLK-5M05 is designed to meet the needs of a wide range of applications. Below are its key technical specifications:

The HLK-5M05 module has six pins, as described in the table below:

1. Input Connections: Connect the AC(L) and AC(N) pins to the live and neutral lines of the AC power source, respectively. Ensure proper insulation and safety precautions when handling high-voltage AC connections.
2. Output Connections: Connect the +5V pin to the positive terminal of your load and the GND pin to the ground terminal of your load.
3. Mounting: Secure the module on a PCB or enclosure using appropriate mounting techniques. Ensure adequate spacing and insulation to prevent short circuits.
4. Filtering: For improved performance and reduced noise, it is recommended to add input and output capacitors:
   • Input: Use a 0.1µF ceramic capacitor and a 10µF electrolytic capacitor.
   • Output: Use a 0.1µF ceramic capacitor and a 470µF electrolytic capacitor.

• Safety: Always handle the module with care when connected to AC power. Ensure proper insulation and avoid touching live connections.
• Heat Dissipation: Although the module is efficient, ensure adequate ventilation or heat dissipation if used in high-temperature environments.
• Load Requirements: Do not exceed the maximum output current of 1A to avoid overloading the module.
• Testing: Before connecting the module to your final circuit, test it with a dummy load to verify proper operation.

The HLK-5M05 can be used to power an Arduino UNO by providing a stable 5V DC output. Below is an example circuit and code:

1. Connect the AC(L) and AC(N) pins to the AC power source.
2. Connect the +5V pin of the HLK-5M05 to the 5V pin of the Arduino UNO.
3. Connect the GND pin of the HLK-5M05 to the GND pin of the Arduino UNO.

// Example code to blink an LED using Arduino UNO powered by HLK-5M05

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. No Output Voltage

   • Cause: Incorrect input connections or no AC power supply.
   • Solution: Verify that the AC(L) and AC(N) pins are connected to a live AC power source.

2. Output Voltage Fluctuations

   • Cause: Insufficient filtering or unstable input voltage.
   • Solution: Add recommended input and output capacitors for filtering.

3. Module Overheating

   • Cause: Overloading or insufficient ventilation.
   • Solution: Ensure the load does not exceed 1A and provide adequate ventilation.

4. Short Circuit Protection Triggered

   • Cause: Output terminals are shorted.
   • Solution: Disconnect the module, resolve the short circuit, and reconnect.

1. Can the HLK-5M05 be used with a 12V DC input?

   • No, the HLK-5M05 is designed for AC input only (85-265V AC). It cannot operate with a DC input.

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

   • Yes, the HLK-5M05 is designed with safety features such as overload, overvoltage, and short-circuit protection, making it suitable for consumer electronics.

3. Can I use the HLK-5M05 to power multiple devices?

   • Yes, as long as the total current draw does not exceed 1A, you can use the module to power multiple devices.

4. What precautions should I take when using the module?

   • Ensure proper insulation, avoid touching live connections, and do not exceed the module's rated specifications.