Description
Description
The XL4015 5A CC-CV Step-Down Power Module is a versatile, high-performance DC-DC buck converter designed for applications requiring precise constant current (CC) and constant voltage (CV) regulation. Whether you need to charge lithium-ion batteries, drive high-power LEDs, or create a benchtop power supply with adjustable current limiting, this module delivers reliable, efficient performance.
At the heart of this module is the XL4015 chip from XLSEMI – a 180KHz fixed frequency PWM buck converter that integrates a high-current 5A power MOSFET . Unlike standard voltage-only regulators, this module features dedicated CC-CV control circuitry, allowing you to independently set both the output voltage and the maximum output current .
CC-CV (Constant Current – Constant Voltage) Explained:
This module operates in two distinct modes, automatically switching between them based on load conditions :
| Mode | Description | When Active |
|---|---|---|
| Constant Current (CC) | Output current is held at the user-set limit; voltage drops as needed | When load tries to draw more than the set current (e.g., charging a deeply discharged battery) |
| Constant Voltage (CV) | Output voltage is held at the user-set value; current varies with load | When load draws less than the set current limit (e.g., battery near full charge) |
Key Applications :
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Lithium Battery Charger: Set the float voltage (e.g., 4.2V for single Li-Ion cells) and charging current – the module automatically switches from CC to CV when the battery reaches full charge. An onboard LED indicates charging status .
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LED Constant Current Driver: Drive high-power LEDs at their specified current (e.g., 3A, 5A) without needing additional resistors. The module maintains a constant current regardless of LED forward voltage variations.
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Adjustable Bench Power Supply: With built-in current limiting, this module can power sensitive circuits safely – if your prototype shorts, the current limit prevents damage.
Comprehensive Protection Features :
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Built-in thermal shutdown – Automatically shuts down when overheated
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Current limiting – User-adjustable from 0-5A via onboard potentiometer
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Output short protection – Reduces switching frequency from 180KHz to 48KHz during shorts
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Charge status indicator – LEDs show charging in progress and battery full
Important Operating Note: This module is a step-down (buck) converter only. The input voltage must always be at least 1.5V higher than the desired output voltage. It cannot step up voltage .
Whether you are building a custom battery charger, designing an LED lighting system, or creating a safe benchtop power supply, the XL4015 CC-CV module provides the precision current limiting and voltage regulation you need.
Key Features
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CC-CV (Constant Current – Constant Voltage) Control – Independently adjustable current limit (0-5A) and output voltage (1.25-32V) for battery charging and LED driving
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5A Maximum Output Current – Integrated 5A power MOSFET delivers up to 5A (4A-4.5A recommended continuous with heatsink)
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Wide Input Voltage Range – Accepts DC 5V to 36V input, compatible with 12V, 24V, and 36V power systems
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Adjustable Output Voltage – Output can be set from 1.25V to 32V via onboard multi-turn potentiometer
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High Conversion Efficiency – Up to 96% efficiency minimizes power loss and heat generation
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75W Maximum Output Power – Capable of delivering up to 75W output power (with adequate cooling)
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Dual LED Indicators – Shows module status: power on, constant current mode active, battery charging, and battery full
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Comprehensive Protection – Built-in thermal shutdown, over-current limiting, and output short protection
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Low Output Ripple – <50mV typical ripple provides clean DC output for sensitive electronics
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Wide Operating Temperature – -40°C to +85°C for reliable operation in various environments
Technical Parameters
| Parameter | Value |
|---|---|
| Input Voltage Range | DC 5V – 36V (max 40V absolute) |
| Output Voltage Range | DC 1.25V – 32V (adjustable) |
| Output Current Range | 0 – 5A (adjustable current limit) |
| Output Power (Max) | 75W (with adequate cooling) |
| Conversion Efficiency | Up to 96% |
| Switching Frequency | 180 KHz (fixed) |
| Output Ripple | < 50mV (typical) |
| Short Circuit Current Limit | 8A (typ.) |
| Operating Temperature | -40°C to +85°C |
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