XL4016 PWM Adjustable 4-36V To 1.25-36V Step-Down Board Module Max 8A 200W DC-DC Step Down Buck Converter Power Supply

XL4016 PWM Adjustable 4-36V To 1.25-36V Step-Down Board Module Max 8A 200W DC-DC Step Down Buck Converter Power Supply
Core Specifications
Electrical Parameters

Input Voltage: 4V – 38V DC
Output Voltage: 1.25V – 36V DC (adjustable)
Output Current:

Peak: 8A
Recommended continuous: ≤5A without cooling

Maximum Power: Up to 200W (with proper cooling)
Efficiency: Up to ~94–95%

Switching & Control

Control Method: PWM (Pulse Width Modulation)
Switching Frequency: ~180 kHz

Physical & Mechanical

Typical Size: ~60 × 37 mm (varies by manufacturer)
Cooling: Usually includes aluminum heatsink
Adjustment: Multi-turn potentiometer (fine voltage tuning)

Protection Features
Most XL4016 modules include:

Over-current protection
Thermal shutdown
Short-circuit protection

Performance Characteristics
1. Current Handling

Claims 8A, but:

Real stable operation ≈ 4–5A without fan
Above that → requires active cooling (fan + good airflow)

2. Power Limit Reality

200W is theoretical:

Example: 24V → 12V @ 8A = 96W ✔️ stable
Full 200W only achievable with ideal conditions + cooling

3. Voltage Drop Requirement

Needs input ≥ output + ~2V margin to regulate properly

Working Principle (Simplified)

Uses switching regulator topology (buck converter):

MOSFET switches ON/OFF at high frequency
Inductor + diode smooth output
PWM duty cycle controls output voltage

Typical Applications

Car battery → 12V/5V conversion
Solar charge systems
LED strip drivers
Motor speed control
DIY power supplies
Battery charging modules

Practical Usage Tips (Very Important)

Always:

Add input fuse for safety
Use thick wires for high current
Add cooling fan above 5A load

Never:

Run near 8A continuously without cooling
Use as boost converter (it is step-down only)

Advantages

High current capability (cheap vs alternatives)
Wide input/output range
High efficiency (~95%)
Compact and easy to use