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XL4015 5A DC-DC Step-Down Buck Converter Module | 5–32V to 0.8–30V | Adjustable CC/CV | LED & Li Battery Charging

$8.16 USD

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XL4015 5A DC-DC Step-Down Buck Converter Module — Adjustable Constant Current / Constant Voltage

A high-efficiency, high-current DC-DC step-down (buck) converter module based on the XL4015 IC, featuring dual adjustable constant current (CC) and constant voltage (CV) control. With a 5A output capability, 95% conversion efficiency, and an input range of 5–32V, this module is the go-to solution for LED driver circuits, lithium battery charging (Li-ion, LiPo, LiFePO4), and adjustable bench power supply builds. Two onboard potentiometers allow independent adjustment of output voltage and current limit — making it a versatile power management module for a wide range of DIY and professional applications.

Specifications

IC	XL4015
Input Voltage	5V – 32V DC
Output Voltage	0.8V – 30V DC (adjustable)
Output Current	5A (max continuous)
Output Power	75W (max)
Conversion Efficiency	Up to 95%
Switching Frequency	300kHz
Output Ripple	≤50mV (20MHz bandwidth)
Load Regulation	±0.5%
Voltage Regulation	±2.5%
Operating Temperature	-40°C to +85°C
Module Dimensions	51 × 26.3 × 14mm
Control Mode	CC (constant current) + CV (constant voltage)

CC/CV Mode Explained

This module operates in two modes, automatically switching between them based on load conditions:

Constant Voltage (CV) mode: the output voltage is regulated to the set value regardless of load current (up to the current limit). Used for powering fixed-voltage loads like LED strips, microcontrollers, and general electronics.
Constant Current (CC) mode: when the load demands more current than the set limit, the module reduces output voltage to maintain the set current. Used for battery charging (where current must be controlled) and LED driving (where forward current must be limited).

Key Features

✅ 5A output current — handles high-current loads including high-power LEDs and battery charging
✅ 95% conversion efficiency — minimal heat generation, suitable for continuous operation
✅ Dual CC/CV adjustment — independent voltage and current limit potentiometers
✅ Wide input range 5–32V — compatible with 12V, 24V, and solar panel inputs
✅ Wide output range 0.8–30V — covers 3.3V, 5V, 12V, and custom voltage requirements
✅ 300kHz switching frequency — small inductor and capacitor requirements, compact module size
✅ -40°C to +85°C operating range — suitable for automotive and outdoor applications
✅ Compact 51 × 26.3 × 14mm — fits in tight enclosures and project boxes

Common Applications

Li-ion / LiPo battery charging — set CV to 4.2V (1S) or 8.4V (2S), set CC to 0.5C–1C charge rate
LiFePO4 battery charging — set CV to 3.65V per cell, set CC to desired charge rate
High-power LED driver — set CC to LED rated forward current for constant brightness
Adjustable bench power supply — combine with a 24V or 30V input for a variable 0–30V / 0–5A lab supply
Solar panel MPPT charging — step down solar panel voltage to battery charging voltage
Motor speed control — adjust output voltage to control DC motor speed
Voltage conversion — step down 24V to 5V/12V for mixed-voltage systems

Lithium Battery Charging Guide

Battery Type	CV Setting	CC Setting
Li-ion / LiPo 1S	4.20V	0.5C – 1C of battery capacity
Li-ion / LiPo 2S	8.40V	0.5C – 1C of battery capacity
LiFePO4 1S	3.65V	0.5C – 1C of battery capacity
LiFePO4 2S	7.30V	0.5C – 1C of battery capacity

Frequently Asked Questions

Q: Does this module have short-circuit protection?
A: The XL4015 IC includes current limiting which provides protection against overload. For hard short-circuit protection, add an external fuse on the output.

Q: Can I use this to charge a 12V lead-acid battery?
A: Yes. Set CV to 14.4V (bulk charge) or 13.8V (float charge) and set CC to the appropriate charge rate for your battery capacity.

Q: Do I need a heatsink?
A: At full 5A output, the module will generate heat. The onboard components include a heatsink pad, but for sustained high-current operation, ensure adequate airflow or add an external heatsink to the main switching IC.