How to Use HLK-LD6002H: Examples, Pinouts, and Specs

The HLK-LD6002H is a compact, high-efficiency AC-DC power supply module designed to convert an input voltage range of 85-265V AC into a stable 5V DC output. This module is ideal for powering low-power electronic devices, offering a reliable and efficient solution for embedded systems, IoT devices, and other small-scale electronics.

• Powering microcontrollers (e.g., Arduino, ESP32, Raspberry Pi Pico)
• IoT devices and smart home applications
• Low-power sensors and actuators
• Industrial control systems
• Consumer electronics requiring a 5V DC power source

The HLK-LD6002H is designed to meet the needs of compact and efficient power conversion. Below are its key technical specifications:

The HLK-LD6002H module has six pins for input and output connections. The table below describes each pin:

1. Connect the AC Input:

   • 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. Connect the DC Output:

   • Connect the +5V OUT pin to the positive terminal of your load or circuit.
   • Connect the GND pin to the ground terminal of your load or circuit.

3. Mounting and Placement:

   • Place the module in a well-ventilated area to prevent overheating.
   • Avoid placing the module near high-temperature components or in humid environments.

4. Safety Precautions:

   • Ensure the input voltage is within the specified range (85-265V AC).
   • Do not touch the module while it is powered to avoid electric shock.
   • Use proper fuses or circuit breakers for additional safety.

• Isolation: The module provides 3000V AC isolation, making it safe for use in most applications. However, ensure proper grounding to avoid electrical noise.
• Load Requirements: Do not exceed the maximum output current of 600mA to prevent damage to the module.
• Filtering: For sensitive applications, consider adding a capacitor (e.g., 470µF) across the output terminals to reduce noise and ripple.

The HLK-LD6002H can be used to power an Arduino UNO directly. Below is an example circuit and code:

• Connect +5V OUT to the Arduino's 5V pin.
• Connect GND to the Arduino's GND pin.
• Connect AC IN (L) and AC IN (N) to the AC power source.

// Example code to blink an LED using Arduino UNO powered by HLK-LD6002H

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 AC input connections or insufficient input voltage.
   • Solution: Verify that the AC IN (L) and AC IN (N) pins are connected correctly and that the input voltage is within the specified range.

2. Overheating:

   • Cause: Exceeding the maximum output current or poor ventilation.
   • Solution: Ensure the load does not exceed 600mA and place the module in a well-ventilated area.

3. High Output Noise:

   • Cause: Insufficient filtering for sensitive applications.
   • Solution: Add a capacitor (e.g., 470µF) across the output terminals to reduce noise and ripple.

4. Module Not Working After Installation:

   • Cause: Damage due to incorrect wiring or overvoltage.
   • Solution: Double-check all connections before powering the module. Replace the module if damaged.

Q1: Can the HLK-LD6002H power a Raspberry Pi?
A1: No, the HLK-LD6002H provides a maximum current of 600mA, which is insufficient for most Raspberry Pi models. Use a power supply with a higher current rating.

Q2: Is the module safe to use in outdoor applications?
A2: The HLK-LD6002H is not waterproof or weatherproof. Use it in indoor or enclosed environments only.

Q3: Can I use the module with a 12V DC input?
A3: No, the HLK-LD6002H is designed for AC input only. Using a DC input may damage the module.

Q4: What happens if I exceed the maximum output current?
A4: Exceeding 600mA may cause the module to overheat or fail. Always ensure the load is within the specified limits.