600W 25A Buck Step-Down DC-DC Converter Module – CV/CC Adjustable
600W 25A Buck Step-Down DC-DC Converter Module – CV/CC Adjustable
LOTHYE 600W 25A Buck Constant Voltage / Constant Current Step-Down Power Module
Whether you're powering a battery charging station, LED array, motor controller, or custom electronics project, this high-power adjustable DC-DC buck converter delivers precision voltage and current control in a compact, fan-cooled package. With an input range of DC 12–75V and an adjustable output of DC 2.5–50V at up to 25A, it's one of the most versatile step-down modules available for engineers, hobbyists, and makers alike.
Made in Mainland China.
Key Features
- Wide Input Range: DC 12V–75V — compatible with a broad range of DC power sources
- Adjustable Output Voltage: DC 2.5V–50V (step-down only; max output ≈ input × 0.8)
- High Output Current: Up to 25A continuously adjustable from 1–25A
- Maximum Output Power: 600W peak; recommended sustained use under 500W
- Dual CV/CC Control: Separate potentiometers for constant voltage (CV) and constant current (CC) adjustment
- High Efficiency: Up to 95% typical conversion efficiency at 80 kHz switching frequency
- Fan-Cooled Design: Active cooling keeps the module running reliably at high loads
- Short-Circuit Protection: Current-limited short-circuit protection built in
- Output Indicator Light: Visual confirmation of active output
- Compact Size: 100 × 60 × 35 mm — easy to integrate into enclosures and projects
Technical Specifications
| Module Type | Non-isolated buck regulator |
| Input Voltage | DC 12V – 75V |
| Output Voltage | DC 2.5V – 50V (adjustable) |
| Max Output Voltage | ≈ Input voltage × 0.8 |
| Output Current | 1A – 25A adjustable (25A max) |
| Output Power | 600W peak / <500W sustained |
| Switching Frequency | 80 kHz |
| Efficiency | Up to 95% typical |
| Cooling | Active fan cooling |
| Short-Circuit Protection | Yes (constant current limiting) |
| Input Reverse Polarity Protection | None — verify polarity before powering on |
| Output Anti-Backfeed Protection | None — add a series diode for battery/inductive loads |
| Input Overvoltage Protection | None — maintain input margin |
| Output Indicator | Yes |
| Dimensions | 100 × 60 × 35 mm |
| Brand | LOTHYE |
| Condition | New |
Wiring Guide
- IN+ — Input positive
- IN− — Input ground
- OUT+ — Output positive
- OUT− — Output ground
Always confirm positive/negative polarity before powering on. No input reverse-polarity protection is included.
How to Adjust Voltage (CV)
After powering on, monitor the output with a voltmeter. Turn the CV potentiometer clockwise to increase voltage and counterclockwise to decrease it until you reach your desired output level.
How to Set Constant Current (CC)
- Set the output voltage to 5V.
- Turn the current potentiometer fully counterclockwise (~20 turns). Output will drop to near zero.
- Set your multimeter to current (ampere) mode and connect its test leads to the module's output terminals.
- Slowly turn the current potentiometer clockwise until the multimeter displays your desired current value.
Safety Notes
- If the module temperature exceeds 75°C under load, add additional heat sinking or reduce load (derate).
- For inductive or battery loads, add a series diode at the output positive terminal to prevent back-feed.
- Always double-check input polarity — no reverse protection is present.
- For sustained operation, keep power below 500W for best reliability.
Related Products You May Like
- Air Compressor Pressure Gauge 0-10/0-12/0-25 Bar | DIY Tool
- Electromagnetic Induction Tester – Coil & Circuit Fault Detector
- 360° Bicycle Chain Cleaner Tool | Bike Gear Cleaning Kit
Learn more: OSHA on personal protective equipment
Frequently Asked Questions
Q: What is the maximum safe continuous output power for this buck converter module?
A: While this step-down power module is rated at 600W peak, it is recommended to keep sustained operation below 500W for long-term reliability. If the module's temperature exceeds 75°C during load, either reduce the load (derate) or add supplemental heat dissipation such as a heatsink or additional airflow.
Q: Can this module boost voltage — for example, from 12V input to 24V output?
A: No. This is a step-down (buck) only converter. The output voltage must always be lower than the input voltage, with a maximum output of approximately 80% of the input voltage. It cannot boost voltage above the input level.
Q: Does this DC-DC converter module include reverse polarity or overvoltage protection?
A: No — this module does not include input reverse polarity protection or input overvoltage protection. Always verify the correct positive/negative connections before applying power, and ensure your input voltage stays within the 12–75V range with adequate margin. Short-circuit protection is included via the constant current limiting function.
Q: How do I use this module as a battery charger?
A: Set the output voltage to your battery's target charge voltage using the CV potentiometer, then set the maximum charge current using the CC potentiometer. Because the module has no output anti-backfeed protection, add a series diode at the OUT+ terminal when connecting to a battery to prevent reverse current flow into the module.