XL4015 5A Step-Down Module with Voltmeter
₵75.00
The XL4015 Step Down Module is a powerful 5A DC-DC buck converter that features a built-in LED voltmeter. It allows you to efficiently step down input voltages (up to 36V) to a precise lower output while monitoring the voltage levels in real-time.
How to use the button: The small button on the board switches the display between Input Voltage and Output Voltage. A generic LED usually lights up to indicate which one you are currently viewing.
Although rated for 5A, we recommend adding a small heatsink if you plan to run it above 3A for long periods to prevent overheating.
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Core Functionality and Specifications
The module is based on the XL4015 integrated circuit, a powerful and efficient switching regulator.
Key Specifications
| Feature | Specification |
| Main IC | XL4015 Buck Converter |
| Input Voltage VIN | 4V to 38V DC |
| Output Voltage V OUT | 1.25V to 36VDC (Adjustable) |
| Max Output Current | 5A (Rated), 4.5A Continuous (Cooling recommended above 3A |
| Max Output Power | 75W |
| Conversion Efficiency | Up to 96% |
| Switching Frequency | 180kHz |
| Adjustment | Multi-turn Trimming Potentiometer (Pot) |
Important Consideration: Step-down Requirement
As a step-down (buck) converter, the module requires the Input Voltage (VIN) to be at least 1.5V to 2V higher than the Output Voltage (V OUT) for proper regulation.
Digital Voltmeter Feature
The integrated 3-bit digital display is a major convenience feature of this specific module variant.
- Display Type: 0.56-inch 3-digit LED display (typically red or blue).
- Measurement: Displays the DC voltage.
- Mode Button: A small tactile button allows the user to switch the display between showing the Input Voltage (VIN) and the Output Voltage (VOUT). This is invaluable for monitoring both source and load conditions without needing an external multimeter.
- Calibration: Some versions include a calibration feature accessible via the button to ensure accuracy.
Module Pinout and Connections
The module has four main terminal points, usually screw terminals for secure wiring.
| Terminal | Name | Function | Connection |
| IN+ | Input Positive | Connects to the positive pole of the Power Source. | (e.g., 12V battery) |
| N- | Input Negative | Connects to the negative pole of the Power Source (Ground). | (e.g., Battery Ground) |
| OUT+ | Output Positive | Connects to the positive pole of the Load. | (e.g., 5V microcontroller circuit) |
| OUT- | Output Negative | Connects to the negative pole of the Load (Ground). | (e.g., Load Ground) |
Adjustment
The output voltage is adjusted using the multi-turn trimming potentiometer (often blue/white) mounted on the board. Turning the pot allows you to precisely set the desired V_OUT.
Applications
The XL4015 module is versatile and suitable for many applications:
- Bench Power Supply: Used to create a basic, variable voltage lab power supply from a fixed high-voltage adapter.
- Battery Charging: Can be used as a constant current/constant voltage (CC/CV) charger for lithium batteries (requires a specific variant with separate current and voltage pots).
- LED Drivers: Powering high-power LED strips or arrays.
- Microcontroller Power: Efficiently stepping down a 12V or 24V source to a stable 5V or 3.3V for embedded electronics.
- Solar Regulation: Used in small solar systems to step down panel voltage to charge a battery.
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