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