XL4015 5A CC/CV Buck Converter - Adjustable LED Driver & Lithium Battery Charger

Specifications

• Input Voltage: 5V to 32V DC

• Output Voltage: 0.8V to 30V DC (Continuously Adjustable)

• Output Current: 0A to 5A (Adjustable limit)

• Conversion Efficiency: Up to 95%

• Regulation Modes: Constant Current (CC) and Constant Voltage (CV)

• Switching Frequency: 180KHz

• Status Indicators: Red (CC/Full), Blue (Charging)

• Wiring: Screw Terminals for "IN+"/"IN-" and "OUT+"/"OUT-"

Key Applications & Projects

• Lithium-Ion Charging: Safely charge 1S to 7S battery packs by setting the exact termination voltage and current limit.

• LED Array Driver: Power 10W to 50W LED beads with stable constant current to prevent flickering and burnout.

• Adjustable Bench Supply: Convert any DC adapter into a lab-style power source with current protection.

• Solar Charge Controller: Manage the fluctuating output of solar panels to safely charge lead-acid or lithium batteries.

Unlock New Capabilities (Project Evolution)

• Feature Upgrade: The dedicated Current Adjustment pot acts as an electronic fuse. If your project has a short circuit, the module will simply drop the voltage to maintain the current limit rather than blowing components.

• Effort Level: Intermediate. Calibration requires a multimeter and a basic understanding of your load's CC/CV requirements.

PACKAGE INCLUDED

• 1 x XL4015 5A Constant Current Constant Voltage Module

FREQUENTLY ASKED QUESTIONS (FAQ)

• What is the maximum input voltage? It can handle up to 32V DC.
• Can I step up the voltage? No, this is a "buck" or step-down converter; the input must be higher than the desired output.
• How do I adjust the current limit? Turn the "Adjust current" potentiometer clockwise to increase the limit.
• How do I set it for battery charging? Set the voltage to the battery's full charge level (e.g., 4.2V for Li-ion), then short the output with an ammeter to set the max charge current.
• What do the LEDs indicate? Red (on left) is for Constant Current; Blue is for active charging; Green (on right) is for a full charge or idle state.
• Does the inductor orientation matter? No, whether vertical or horizontal, the performance and specifications are identical.
• Is it safe to charge a 12V battery from a 24V source? Yes, as long as you calibrate the CC and CV settings correctly.
• What is the minimum output voltage? It can be adjusted down to 0.8V.
• Can it handle 5A continuously? For continuous 5A draw, active cooling (a fan or a large heatsink) is required. 3A-4A is safe for passive cooling.
• What is the efficiency? It reaches up to 95% efficiency depending on the voltage drop.
• Does it have reverse polarity protection? No, connecting the input backward will damage the module instantly.
• Can I use this as a solar controller? Yes, it is excellent for managing battery charging from solar panels under 32V.
• What frequency does it operate at? It uses a high switching frequency of 180KHz for clean power.
• How many potentiometers are on the board? There are two: one for voltage and one for current limit.
• Are the terminals clearly marked? Yes, the board is labeled for IN+, IN-, OUT+, and OUT-.
• Can I drive a 50W LED? Yes, provided the voltage and current requirements fall within 0.8-30V and under 5A.
• Does the voltage change if I adjust the current? No, the settings are independent until the load attempts to draw more than your set current limit.
• How do I know the battery is full? The Blue charging light will turn off and the Green (or Red, depending on batch) "Full" LED will light up.
• What size are the mounting holes? The board features standard mounting holes for M3 standoffs.
• Is this better than an LM2596? Yes, for high current; the XL4015 handles up to 5A whereas the LM2596 is generally capped at 3A.