1. Product Overview
The Dmyond DC DC 250W 10A Boost Converter is a non-isolated step-up module designed to convert a lower DC input voltage to a higher DC output voltage. It features adjustable output voltage and constant current capabilities, making it suitable for various applications such as mobile power supplies, LED drivers, and Arduino projects.
This module includes built-in overcurrent protection and input reverse polarity protection for enhanced safety and reliability.
2. Specifications
| Feature | Specification |
|---|---|
| Module Type | Non-isolated step-up (BOOST) |
| Input Voltage | DC 8.5V - 48V |
| Input Current | 10A (MAX) |
| Quiescent Current | 10mA (at 12V input, 20V output) |
| Output Voltage | 10V - 50V (Continuously adjustable) |
| Output Current | 0.2A - 8A (Continuously adjustable) |
| Output Power | 201W - 300W |
| Operating Frequency | 150KHz |
| Conversion Efficiency | Up to 96% |
| Overcurrent Protection | Yes |
| Input Reverse Polarity Protection | Yes |
| Installation | 4x 3mm screw holes |
| Module Dimensions (L x W x H) | 70mm x 36mm x 13mm |
| Weight | 65g |
3. Setup and Installation
Before connecting the module, ensure your power source is turned off. This module requires careful wiring to prevent damage.
3.1 Wiring Connections
Identify the input and output terminals on the module:
- VIN+: Input Positive
- VIN-: Input Negative
- OUT+: Output Positive
- OUT-: Output Negative
Connect your DC power source to the VIN+ and VIN- terminals. Connect your load (e.g., LED array, mobile device) to the OUT+ and OUT- terminals. Ensure all connections are secure and correct polarity is observed.
3.2 Mounting
The module features four 3mm screw holes for secure mounting. It is recommended to mount the module in an enclosure or on a stable surface to prevent accidental contact and ensure proper heat dissipation.
4. Operating Instructions
This module allows for continuous adjustment of both output voltage and output current.
4.1 Voltage Adjustment (V-ADJ)
- Connect the input power (DC 8.5V-48V).
- Connect a voltmeter to the output terminals (OUT+ and OUT-).
- Turn the potentiometer labeled V-ADJ (Voltage Adjust) clockwise to increase the output voltage, or counter-clockwise to decrease it. Adjust to your desired output voltage (10V-50V).
4.2 Current Adjustment (CC-ADJ)
The constant current feature is useful for driving LEDs or charging batteries.
- Connect the input power.
- Set the output voltage using the V-ADJ potentiometer to a value slightly higher than the forward voltage of your LED or charging voltage of your battery.
- Connect an ammeter in series with the load, or connect the load directly.
- Turn the potentiometer labeled CC-ADJ (Constant Current Adjust) counter-clockwise until the output current drops to its minimum.
- Then, slowly turn CC-ADJ clockwise to increase the current to your desired value (0.2A-8A).
Important: When adjusting the current, ensure the output voltage is set appropriately for your load to avoid damage.
5. Maintenance
The Dmyond Boost Converter module is designed for reliable operation with minimal maintenance. Follow these guidelines to ensure longevity:
- Cleanliness: Keep the module free from dust and debris. Use a soft, dry brush or compressed air for cleaning.
- Environmental Conditions: Operate the module within its specified temperature range (-40°C to +85°C). Avoid exposure to excessive moisture or corrosive environments.
- Heat Dissipation: If the input current exceeds 8A or the ambient temperature is high, ensure adequate heat dissipation. This may involve adding a heatsink or active cooling (fan) to the module. The module is equipped with a metal plate on the bottom for passive heat dissipation.
6. Troubleshooting
- No Output Voltage:
- Check input power supply connections and ensure correct polarity.
- Verify the input voltage is within the specified range (DC 8.5V-48V).
- Ensure the V-ADJ potentiometer is not set to minimum.
- Output Current Too Low/High:
- Adjust the CC-ADJ potentiometer.
- Ensure the load is correctly connected and functioning.
- Module Overheating:
- Reduce the input current if it exceeds 8A.
- Improve ambient ventilation or add additional cooling (heatsink/fan).
- Ensure the module is not operating in an excessively high ambient temperature.
- Overcurrent Protection Triggered:
- Reduce the load current.
- Check for short circuits in the output wiring or load.
- Input Reverse Polarity Protection:
- The module has built-in reverse polarity protection. If input polarity is reversed, the module will not operate, preventing damage. Correct the input wiring.
7. User Tips
- Initial Setup: When first powering on, it's good practice to start with the voltage adjustment potentiometer (V-ADJ) turned counter-clockwise to ensure a low output voltage, then slowly increase it to the desired level.
- Current Limiting: For sensitive loads like LEDs, always set the constant current limit (CC-ADJ) before connecting the final load to prevent overcurrent damage.
- Heat Management: For continuous high-power operation (e.g., near 250W or 10A), consider adding an external heatsink or a small fan to the module to maintain optimal performance and extend its lifespan.
- Measurement Accuracy: Use a reliable multimeter for accurate voltage and current measurements during setup and adjustment.
8. Warranty and Support
For any technical assistance, warranty claims, or support inquiries, please contact the seller or manufacturer directly.
An official user manual in PDF format is available for download: Download User Manual (PDF)
