XL6019 5A Adjustable Boost Converter Module – High Power Upgrade to XL6009 & LM2577 (3-40V Input, 5A Output)

Usage Guide

Pinout Description

The module features screw terminal blocks for easy connections:

Note: Input and output grounds are common (connected together on the board).

Wiring Instructions

Step 1 – Connect Input Power

• Connect the positive (+) wire of your DC power source to the IN+ terminal

• Connect the negative (-) wire of your power source to the IN- terminal

Step 2 – Connect Load

• Connect the positive (+) wire of your load to the OUT+ terminal

• Connect the negative (-) wire of your load to the OUT- terminal

Step 3 – (Optional) Connect Enable Pin for Remote Control

• For always-on operation, leave EN pin disconnected (floating – default HIGH)

• For remote control, connect EN to a microcontroller GPIO pin (3.3V or 5V logic compatible)

  • EN HIGH (1.4V – VIN) → Module ON

  • EN LOW (0V – 0.8V) → Module OFF

Step 4 – Power On and Adjust

• Apply power to the input

• Use a digital multimeter to measure voltage between OUT+ and OUT-

• Adjust the blue potentiometer to your desired voltage

Adjusting the Output Voltage

⚠️ CRITICAL: The “Endless Turn” Issue

This is the most common point of confusion. The potentiometer often ships at its maximum resistance position. If you turn the screw and see no voltage change, you need to turn it counter-clockwise for 10-15 full rotations before the voltage begins to increase. Keep turning while watching your multimeter until the voltage starts to rise. The potentiometer is multi-turn, so you won’t damage it.

Proper Adjustment Procedure:

1. Power the module using your input source (5V-40V DC)

2. Connect a multimeter to the OUT+ and OUT- terminals

3. Use a small screwdriver to turn the blue potentiometer:

   • Turn counter-clockwise (left) to INCREASE output voltage

   • Turn clockwise (right) to DECREASE output voltage

4. Monitor the multimeter while adjusting

5. Adjust before connecting load – It is recommended to set output voltage with no load connected

Typical Voltage Settings by Application:

Understanding the XL6019’s Versatility

Unlike the XL6009 which is limited to boost (step-up) operation, the XL6019 chip can be configured in multiple topologies :

⚠️ Important: Most ready-made modules are configured as boost converters only. Check your specific module’s documentation to confirm its configuration. If you need buck-boost capability, verify before purchasing.

Power Ratings and Thermal Management

The XL6019 chip has a 5A switching current limit, but practical output current depends on several factors:

Recommended Output Current Guidelines:

Power Calculation Examples:

Important Current Relationship: Boost converters draw more input current than output current due to power conservation:

Power In × Efficiency = Power Out or VIN × IIN × Efficiency = VOUT × IOUT

Example: To get 1.5A at 24V output (36W) from a 12V input, the input current must be approximately 3.2A-3.5A (accounting for efficiency losses). Ensure your input power source can supply sufficient current.

Heat Management Tips:

• Add a heatsink to the XL6019 chip for continuous loads above 1.5A

• Ensure adequate airflow around the module

• Consider using a higher input voltage to reduce the voltage conversion ratio and associated heat

• The module includes thermal shutdown protection, but good thermal design is still recommended

Important Operating Restrictions

Voltage Limitation (Critical):
This module is configured as a step-up (boost) converter only in most ready-made versions. If your module is a standard boost converter, the output voltage must always be set higher than the input voltage. If the input voltage exceeds the set output voltage, the module will not regulate down, and the output will approximately follow the input voltage, potentially damaging your load.

For buck-boost versions: The output voltage can be higher or lower than the input, making them ideal for automotive applications where input voltage fluctuates (e.g., 9V-30V input to stable 12V output) .

Reverse Polarity Warning:
Most modules do NOT have reverse polarity protection. Double-check your IN+ and IN- connections before applying power. Connecting backwards will instantly destroy the module.

Short Circuit Protection:
The XL6019 chip includes over-current limiting, but this is not a full short circuit protection feature. Adding a small fuse on the input line is good safety practice.

Using the Enable Pin (If Available)

Some XL6019 modules expose the EN pin for remote control :

Connecting to a Microcontroller (Arduino Example):

// XL6019 Enable Pin Control Example
// Connect EN pin to any digital GPIO pin

const int ENABLE_PIN = 7;  // GPIO connected to XL6019 EN pin

void setup() {
  pinMode(ENABLE_PIN, OUTPUT);
  digitalWrite(ENABLE_PIN, HIGH);  // Start with module ON
}

void loop() {
  digitalWrite(ENABLE_PIN, HIGH);  // Module ON
  delay(10000);
  
  digitalWrite(ENABLE_PIN, LOW);   // Module OFF (shutdown)
  delay(5000);
}

Example Applications

Installation Tips

• Polarity Check: Always double-check input polarity before applying power

• Initial Setup: Adjust output voltage with no load connected first

• Enable Pin: Leave floating for always-on operation; connect to control signal for remote management

• Keep Wires Short: Long wires add resistance and inductance, reducing efficiency

• Use a Fuse: Add a fuse (e.g., 5A) on the input line as safety protection

• Heat Sinking: For loads >1.5A continuous, attach a heatsink to the XL6019 chip

• Start with Low Load: When first testing, use a low-current load to verify voltage setting before connecting sensitive equipment