XL4015 5A CC/CV Adjustable Step-Down Buck Module with Dual V/A Display

XL4015 5A CC/CV Adjustable Step-Down Buck Module with Dual V/A Display is a precision Constant-Voltage / Constant-Current (CC/CV) step-down power supply and battery charger module featuring a stacked dual 3-digit LED display daughterboard that simultaneously shows real-time Output Voltage (top display, XX.XU) and Output Current (bottom display, X.XXA). Powered by the 180kHz XLSEMI XL4015E1 5A buck regulator IC, it steps down 5V–30V DC to an adjustable 0.8V–29V DC output with adjustable current limiting for laboratory power supplies, lithium/lead-acid battery charging, and high-power LED driving.

Key Features:

• Simultaneous Dual LED Voltage & Current Display: Dedicated plug-in display daughterboard reads live output voltage (XX.XU) on the top 7-segment display and live load current (X.XXA) on the bottom display without toggling buttons.
• True CC / CV Multi-Turn Regulation: Two onboard 3296W multi-turn potentiometers independently set the regulated output voltage (0.8V–29V) and the maximum constant-current limit (0A–5A).
• 3-Stage Charge & CC Status LEDs: Dedicated SMD indicator LEDs show Constant-Current limiting active (Red), Battery Charging in progress (Blue/Red), and Charge Complete (<10% of CC setting, Green).
• Up to 5A / 75W Output Capacity: High-efficiency (up to 95%) XL4015 switching stage delivers 3A continuously under natural convection and up to 5A with heatsink/airflow cooling.
• Screw Terminal + Standoff Construction: Includes 5.08mm input/output screw terminal blocks and brass/nylon standoffs supporting the dual-meter daughterboard.

Technical Specifications:

• Regulator IC: XLSEMI XL4015E1 180kHz 5A Buck Regulator
• Input Voltage Range: 5.0V to 30.0V DC
• Output Voltage Range (CV): 0.8V to 29.0V DC Continuously Adjustable (Minimum 1V dropout below VIN)
• Output Current Limit Range (CC): 0.05A to 5.0A Adjustable (3.0A Continuous Natural Cooling / 5.0A with Heatsink & Fan)
• Conversion Efficiency: Up to 95%
• Switching Frequency: 180 kHz
• Display Format: Top = Voltage (XX.XU, 0.1V resolution) | Bottom = Current (X.XXA, 0.01A resolution)

Mechanical Specifications:

• Assembly Structure: Two-Tier Stacked PCB (Main XL4015 CC/CV Power Board + Dual-LED V/A Meter Daughterboard)
• Terminals: 2 × 2-Pin Screw Terminal Blocks (IN+/IN-, OUT+/OUT-)

Dimensions:

• Length: 51 mm
• Width: 26.3 mm
• Height: 23 mm (Stacked Assembly)
• Weight: ~32 g

Pinout and Wiring:

• IN+ / IN-: Connect 5V–30V DC input power source. Warning: Observe polarity strictly; reversing input polarity will damage the IC.
• OUT+ / OUT-: Regulated 0.8V–29V CC/CV output to load or battery.
• Center Potentiometer (CV): Turn clockwise (CW) to increase output voltage; counterclockwise (CCW) to decrease.
• Edge Potentiometer (CC): Turn clockwise (CW) to increase current limit; counterclockwise (CCW) to decrease (can be adjusted directly under load while watching the bottom X.XXA display).

Datasheet Reference:

• Primary IC Datasheet: XLSEMI XL4015 180kHz 36V 5A Switching Buck Regulator Datasheet (PDF)

Commonly Used in:

• Compact Digital CC/CV Laboratory Bench Power Supplies
• Multi-Chemistry Battery Chargers (1S–6S Li-Ion, LiFePO4, 6V/12V/24V Lead-Acid)
• High-Power Constant-Current LED Array Drivers
• Solar Panel Battery Charge Controllers

Applications:

• Lets engineers set an exact current limit (e.g. 0.50A or 1.50A) directly on the live ammeter display when testing newly soldered prototype PCBs.
• Charges 1S–6S lithium or lead-acid battery packs with full visual visibility of both charging voltage and tapering charge current.
• Drives high-wattage COB LEDs safely at a fixed constant current without needing an external ammeter.

Equivalent Models:

• XL4015 5A Step-Down Adjustable Buck Power Supply with LED Voltmeter: Single-display (voltage-only, CV-only) XL4015 5A module.
• XL4015 5A DC-DC Step-Down Adjustable Buck Power Supply Module: Compact CC/CV bare board without the plug-in LED meter daughterboard.

Package Includes:

• 1 × XL4015 5A CC/CV Adjustable Step-Down Buck Module with Dual V/A Display