600W 12-80V Step-Down Module – Precision CV/CC Control with Minimal Energy Loss
Need to step down voltage from a 24V, 48V, or even 72V source to an exact requirement? Achieve stable, flicker-free power with this 600W adjustable step-down module. It provides complete control over output voltage and current, with real-time values displayed clearly on the integrated digital screen.
Note: The maximum output voltage is calculated as Input Voltage × 0.8 (e.g., at 60V input, the maximum output is 48V). This module is not compatible with 72V battery systems. When using this for battery charging, we recommend adding a diode to prevent reverse current flow.
Why choose this step-down module? (Key Advantages):
- Independent CV/CC Adjustment — Independently tune voltage (2.5V–50V) and current (0–20A), perfect for loads with strict startup or charging requirements.
- Dual Digital Display — Monitor output voltage and current simultaneously without the need for an external multimeter.
- High Efficiency (≥93%) — At 600W, this means less than 42W of thermal loss, significantly better than standard converters which often lose 90–120W.
- 25A Overcurrent Protection — If the load exceeds your set limit, the circuit automatically restricts current to prevent damage.
- Reverse Polarity Protection — Built-in safety ensures the module remains intact if connections are accidentally reversed.
- Wide Operating Temperature — Stable performance from -40°C to +85°C, making it suitable for both unheated workshops and enclosed metal housings.
- Compact Footprint: 125×70×32mm — Designed to fit easily into most project enclosures without requiring a complete layout redesign.
Performance and Technical Details
This converter utilizes a high-frequency switching buck topology, ensuring the output voltage remains stable even during sudden load fluctuations. The VADJ potentiometer controls voltage, while the IADJ potentiometer sets the current limit—each operating independently. Three LED indicators provide instant status feedback: blue (CV mode/no load), green (active current), and red (CC mode active)—giving you clear visual confirmation without needing an oscilloscope.
| Parameter | Specification |
|---|---|
| Input Voltage | DC 12V – 80V (Not compatible with 72V batteries) |
| Output Voltage | 2.5V – 50V adjustable (Max = Vin × 0.8) |
| Max Output Current | 20A (Automatic protection at 25A) |
| Maximum Power | 600W |
| Efficiency | ≥ 93% |
| Display | Digital – Simultaneous voltage and current |
| Operating Mode | CV (Constant Voltage) / CC (Constant Current) |
| Integrated Protections | Overcurrent (25A), Reverse Polarity |
| Operating Temperature | -40°C – +85°C |
| Storage Temperature | -20°C – +50°C |
| Relative Humidity | 65% ± 20% |
| Dimensions | 125mm × 70mm × 32mm |
Setup and Usage Instructions
- Connect your power source to the IN+ and IN- terminals, ensuring correct polarity (DC 12V–80V).
- Connect your load to the OUT+ and OUT- terminals.
- Adjust output voltage by turning the VADJ potentiometer — clockwise to increase, counter-clockwise to decrease.
- Set the current limit by turning the IADJ potentiometer — clockwise to increase the maximum allowed current, counter-clockwise to reduce it.
- Monitor the LED indicators: blue = CV mode (no load); green = active current; red = CC mode active.
- For battery charging: You must install a diode on the output line to block reverse current from flowing back into the module.
Package Contents
- 1× 600W 20A 12-80V DC-DC Step-Down Module with Digital Display
Frequently Asked Questions
Can I use a 72V battery as an input source?
No. A 72V battery can generate voltage spikes that exceed the module’s safe operating limit. The input voltage must remain strictly between 12V and 80V.
What is the maximum output voltage if the input is 60V?
48V. The formula is: Maximum Output Voltage = Input Voltage × 0.8. Apply this calculation to any input value.
Does this work for charging Li-Ion or LiPo batteries?
Yes, the CC (Constant Current) mode is ideal for the charging phase. Remember to add a diode on the output; without it, reverse current from the battery could damage the module.
Do I need extra cooling at maximum power?
For loads exceeding 400–450W, adding a heatsink or a small cooling fan will significantly extend the lifespan of the components. At a continuous 600W, active cooling is highly recommended.
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