80W DC-DC Boost Buck Converter Module – Auto Step-Up & Step-Down

80W DC-DC Auto Boost Buck Converter – Adjustable Voltage Regulator Module

Keep your electronics running at exactly the right voltage with this high-efficiency 80W DC-DC Auto Step-Up & Step-Down Power Supply Module. Whether your input voltage is above or below your target output, this smart converter automatically adjusts — making it ideal for automotive, DIY electronics, battery-powered projects, and laboratory bench use.

Housed in a premium aluminum enclosure and delivering up to 91% conversion efficiency, this module features a built-in voltage display, overheat protection, and easy one-button calibration. Stabilize power to 12V in a vehicle, power a laptop from a solar array, or regulate a custom electronics bench — all with one compact, reliable board.

Key Features

• Auto Step-Up & Step-Down: Output stays stable regardless of whether input is higher or lower — true buck-boost operation
• Wide Input Range: DC 4.5V – 30V input; DC 0.8V – 33V adjustable output
• High Power Output: Up to 80W continuous (5A max output current)
• 91% Conversion Efficiency: Measured at 12V input / 19V output / 2A load
• Built-In Voltage Display: Toggle between input (red indicator) and output (green indicator) voltage readings with a quick button press
• Overheat Protection: Automatically protects the module during heavy loads
• Aluminum Housing: High-grade enclosure for improved heat dissipation and durability
• Display On/Off Control: Hold button 1–2 seconds to toggle display for power saving
• Calibration Mode: Hold button 2+ seconds to enter voltage reference calibration for both input and output

Specifications

Button Function Guide

• Quick Press (<0.5 sec): Toggle display between input voltage (red light) and output voltage (green light)
• Hold 1–2 seconds: Turn display off; press again to turn back on
• Hold 2+ seconds: Enter voltage reference calibration mode
  • Red light blinks = adjusting input reference (default: 3.33V)
  • Hold 1+ sec to save and proceed to output reference (green light blinks)
  • Hold 1+ sec to save and return to normal display

Important Usage Notes

• Do not reverse the positive and negative terminals — incorrect polarity will damage the module
• For continuous 80W operation, add external heatsinking or active cooling; natural convection supports approximately 60W sustained load
• Audible inductor noise under high-current conditions is normal and not a defect
• Allow 1–3 cm measurement tolerance and minor color variation from images due to screen differences

Package Contents

• 1× DC-DC Boost Buck Power Supply Module

For general safe practices when working with DC power electronics, refer to the OSHA Electrical Safety Guidelines.

Frequently Asked Questions

Q: What is the difference between a boost-buck (SEPIC) converter and a regular buck or boost converter?

A: A standard buck converter can only step voltage down, and a standard boost converter can only step voltage up. This auto step-up and step-down module does both automatically — it continuously monitors the input and adjusts to maintain your set output voltage whether the input is higher or lower. This makes it ideal for battery-powered systems where voltage fluctuates during discharge.

Q: Can I use this module in my car or truck to stabilize voltage for sensitive electronics?

A: Yes. Automotive electrical systems typically vary between 11V and 14.8V depending on engine load and alternator output. This module can be set to a stable 12V output, protecting sensitive accessories from voltage spikes or drops. Just ensure your load does not exceed 5A (or 80W) and that polarity is connected correctly.

Q: How do I calibrate the voltage display if it reads inaccurately?

A: Hold the button for more than 2 seconds to enter calibration mode. The red LED will blink, indicating input voltage reference adjustment. Use a known-accurate multimeter to check the actual voltage and adjust the reference value accordingly — increase the reference if the display reads low, and decrease it if it reads high. After saving input calibration (hold 1+ sec), the green LED will blink for output calibration. Save again to return to normal mode.

Q: Does this module need external cooling for high-power use?

A: The aluminum housing provides natural convection cooling sufficient for loads up to approximately 60W in well-ventilated environments. For sustained 80W operation, it is strongly recommended to attach an external heatsink or add a small active cooling fan to prevent the onboard overheat protection from triggering.