SPECIFICATIONS

3-in-1 Power Management Board! XL4015 5A DC-DC Step Down Buck Converter, CV CC Adjustable 4-38V to 1.25-36V, for Li-ion Battery Charger, LED Driver, DIY Power Supply.

Key Features & Benefits:

⚡ 5A High Current, 75W High Power: Robust performance for driving high-power LEDs or fast charging battery packs.

🔋 Constant Voltage & Constant Current Modes: Integrated CC mode makes it perfect as a smart Li-ion/Battery Charger and High-Power LED Constant Current Driver, preventing overcharge and over-current.

🎛️ Dual Pots for Independent Adjustment: Blue for Voltage (CV), White for Current (CC). LED indicator shows CV (Green) or CC (Red) mode clearly.

🛡️ Multiple Protections: Built-in Over-Current Protection (8A limit) and Over-Temperature Protection, safe even if output is shorted.

🔌 Wide Voltage Range: 4-38V input, 1.25-36V adjustable output. Ideal for automotive, solar, lab power supply projects.
Product Description: The XL4015 is more than a simple step-down converter. It combines Adjustable Power Supply, Intelligent Battery Charger, and LED Constant Current Driver into one board. Whether you need to safely charge your 3.7V/12V/24V Li-ion packs, drive high-power LED strips, or provide a stable lab power for your Arduino/Raspberry Pi projects, it's a versatile must-have on every maker's bench.

🚨 Critical User Guide: Read Before Use!

❌ 【What This IS & IS NOT】: This is a Step-Down (Buck) Converter, NOT a Step-Up (Boost).

Input voltage MUST be higher than output. It has NO reverse polarity protection. Double-check polarity before connecting!

⚠️ 【Most Critical Wiring Rule】:

DO NOT short Input & Output Ground directly! You MUST connect GND IN and GND OUT terminals separately to your power source ground and load ground. Shorting them will bypass the current sense resistor, disabling CC mode and likely burning the chip under load!

Always follow terminal labels: V-IN +/- to power source, V-OUT +/- to load/battery/LED.

✅ 【Required Setup for CC Mode】: When using as a Charger or LED Driver, you MUST set it up under NO LOAD first:

1. Connect input power.

2. With OUTPUT OPEN, measure voltage and adjust Blue Pot (CV) to target voltage (e.g., battery full voltage).

3. Set multimeter to 10A, short the OUTPUT terminals directly, adjust White Pot (CC) to target current (e.g., charge current).

4. Remove the short, then connect your battery or LED. This order is crucial!

🔧 【Heat & Operation Notes】:

Heatsink REQUIRED: You MUST add a heatsink when output current exceeds 3A or power >35W (recommend our Heatsink Combo SKU) to prevent overheating or damage.

Voltage Drop Notice: In CC mode, the 0.05Ω sense resistor causes a small voltage drop (0-0.3V) under load. This is normal.

Specifications:

Model: XL4015

Input Voltage: DC 4V - 38V

Output Voltage: DC 1.25V - 36V (Adjustable)

Output Current: 0 - 5A (Max, Adjustable Limit)

Output Power: Max 75W

Efficiency: Up to 96%

Switching Frequency: 180kHz

Operating Temperature: -40℃ ~ +85℃

Protections: Over-Current, Over-Temperature

Dimensions: 51.2mm × 26.2mm × 15mm

Terminals: Screw Terminals

Package Includes:

1 x XL4015 5A DC-DC Step Down Power Module