10A Adjustable Step-Down Power Supply Module with LCD Display
10A Adjustable Step-Down Power Supply Module with LCD Display
10A Adjustable Step-Down Power Supply Module with LCD Screen
Take full control of your DC power projects with this versatile 10A Adjustable Step-Down Power Supply Module. Featuring both Constant Voltage (CV) and Constant Current (CC) modes, this compact buck converter module delivers precise, stable power output for electronics prototyping, battery charging, LED driving, and DIY electrical projects. The built-in LCD display provides a clear three-digit readout of voltage and current at a glance — no guesswork required.
Made in Mainland China.
Key Features
- Wide Input Range: DC 7V–36V input supports a broad variety of power sources
- Adjustable Output: DC 2V–32V output, continuously adjustable — ideal for stepping down voltage to match your load
- High Current Capacity: Up to 10A peak output (8A recommended for sustained use); up to 150W max output power (100W recommended)
- Dual-Mode Control: Switch between Constant Voltage and Constant Current modes for flexible application
- LCD Readout: Real-time voltage and current display with 0.01V / 0.01A accuracy
- High Efficiency: Up to 95% conversion efficiency to minimize energy waste and heat
- Built-in Protections: Short circuit protection (via CC current limiting), input reverse connection protection, and output reverse flow protection
- Wide Operating Temperature: -20°C to +75°C — monitor power transistor temperature and add heatsinking when operating at high loads
- Easy Mounting: Includes two acrylic top/bottom plates, 8 nylon columns, and 8 M3 screws for secure installation
- Flexible Connections: Terminal block or solder terminal — IN for input, OUT for output
Technical Specifications
| Input Voltage | DC 7V – 36V |
| Output Voltage | DC 2V – 32V (continuously adjustable; input must exceed output by at least 1V) |
| Output Current | Adjustable; peak 10A (8A or 60W recommended for natural heat dissipation) |
| Max Output Power | 150W (100W recommended; reduce power at high voltage differentials) |
| Operating Temperature | -20°C to +75°C |
| Display Accuracy | 0.01V / 0.01A, 3-digit LCD |
| Conversion Efficiency | Up to 95% |
| Short Circuit Protection | Yes (constant current limiting) |
| Input Reverse Protection | Yes |
| Output Reverse Flow | Yes |
| Module Dimensions | 80mm × 53mm × 35mm |
| Connection Method | Terminal block or solder terminal |
Package Includes
- 1× 10A Adjustable Step-Down Power Supply Module
- 2× Acrylic mounting plates (top & bottom)
- 8× Nylon columns
- 8× M3 screws
Important Notes
- This is a step-down (buck) converter only — output voltage must always be lower than input voltage by at least 1V.
- For loads exceeding 4A or 60W, add external heatsinking or active cooling to the power transistor.
- At high voltage differentials, reduce total power output to stay within safe thermal limits.
- Slight color variations from product images may occur due to screen calibration differences. Allow ±1–10mm dimensional tolerance due to manual measurement.
For general electrical safety guidance when working with DC power supplies and modules, visit the U.S. Consumer Product Safety Commission (CPSC).
Frequently Asked Questions
Q: Can this step-down power supply module also boost voltage above the input?
A: No — this is a buck (step-down) converter only. The output voltage must always be at least 1V lower than the input voltage. For example, with a 12V input, the maximum usable output is approximately 11V.
Q: How much current can I continuously draw from this module?
A: The module supports a peak of 10A, but for reliable, continuous operation we recommend staying at or below 8A. At room temperature, natural convection cooling is sufficient up to about 4A or 60W. Beyond that, adding a heatsink or small fan to the power transistor is strongly advised.
Q: What does the Constant Current (CC) mode do?
A: In CC mode, the module automatically limits output current to your preset value, making it ideal for charging lithium batteries, driving high-power LEDs, or protecting sensitive components from overcurrent. When the load demands more current than the set limit, the module reduces voltage to maintain the current cap.
Q: How do I read the LCD display?
A: The three-digit LCD shows real-time output voltage (in Volts, 0.01V resolution) and output current (in Amps, 0.01A resolution) simultaneously, so you can monitor your circuit's power draw without any additional test equipment.
Q: Is this module suitable for beginners in electronics?
A: Yes — the included acrylic mounting plates, nylon columns, and screws make assembly straightforward. The terminal block connections are easy to wire. Just ensure your input power source is properly rated and observe the polarity markings (IN/OUT) on the terminals.