How to Use hlk 5m05: Examples, Pinouts, and Specs

The HLK-PM05 is a compact and efficient AC-DC power module designed to convert an 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 circuits. 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
• LED lighting and small appliances
• Prototyping and DIY electronics projects

1. Input Connection: Connect the AC-L and AC-N pins to the live and neutral lines of the AC power source. Ensure proper insulation and safety precautions when handling high-voltage AC connections.
2. Output Connection: Connect the +5V and GND pins to the load or circuit requiring a 5V DC power supply.
3. Mounting: Secure the module on a PCB or enclosure to prevent movement and ensure proper heat dissipation.
4. Filtering: For improved stability and reduced noise, add capacitors to the input and output:
   • Input: A 0.1µF ceramic capacitor and a 10µF electrolytic capacitor.
   • Output: 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 parts.
• Heat Dissipation: Avoid enclosing the module in a space with poor ventilation to prevent overheating.
• Load Requirements: Do not exceed the maximum output current of 1A to avoid damaging the module.
• Isolation: Ensure proper isolation between the AC and DC sides to prevent electrical hazards.

The HLK-PM05 can be used to power an Arduino UNO by providing a stable 5V DC supply. Below is an example circuit and code to blink an LED using the Arduino UNO powered by the HLK-PM05.

1. Connect the AC-L and AC-N pins of the HLK-PM05 to the AC power source.
2. Connect the +5V and GND pins of the HLK-PM05 to the 5V and GND pins of the Arduino UNO.
3. Connect an LED with a 220Ω resistor to pin 13 of the Arduino UNO.

// Simple LED Blink Example
// This code blinks an LED connected to pin 13 of the Arduino UNO.
// Ensure the HLK-PM05 is properly connected to power the Arduino.

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

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
}

1. No Output Voltage:

   • Check the AC input connections for proper wiring.
   • Verify that the AC power source is functioning correctly.
   • Ensure the load does not exceed the module's maximum output current.

2. Overheating:

   • Ensure the module is not enclosed in a poorly ventilated space.
   • Verify that the load is within the module's power rating (5W max).

3. Noise or Instability in Output Voltage:

   • Add filtering capacitors to the input and output as recommended.
   • Check for loose connections or poor soldering.

4. Module Not Powering the Load:

   • Confirm that the load operates at 5V and does not draw more than 1A.
   • Inspect the wiring for any short circuits or incorrect connections.

Q: Can the HLK-PM05 be used outdoors?
A: The HLK-PM05 is not weatherproof and should only be used in indoor, dry environments. For outdoor use, ensure it is enclosed in a weatherproof housing.

Q: Is the HLK-PM05 suitable for battery charging?
A: The HLK-PM05 can be used to power low-power battery chargers, but it is not designed for direct battery charging applications. Use a dedicated charging IC for optimal results.

Q: Can I use the HLK-PM05 with a 3.3V device?
A: The HLK-PM05 outputs 5V DC. To use it with a 3.3V device, you will need a voltage regulator or level shifter to step down the voltage.

Q: What happens if the input voltage exceeds 265V AC?
A: Exceeding the input voltage range can damage the module. Always ensure the input voltage stays within the specified range of 85-265V AC.