1. Introduction
This manual provides detailed instructions for the Aideepen DCE003 DC-DC Step Down Board, a high-efficiency buck converter power supply module. This module is designed to convert a high direct current input voltage (7V-100V) into a stable, lower fixed output voltage (5V, 9V, 12V, or 24V). It features overheat and overload shutdown protection, ensuring reliable operation in various electronic applications.
2. Key Features
- Fixed output voltages: 5V, 9V, 12V, 24V.
- Wide input voltage range: 7V-100V (input must be greater than output voltage).
- Integrated overheat and overload shutdown protection for enhanced safety.
- Compact design with ultra-small volume: 25.5 x 16.5 x 7mm.
- Motherboard half-hole design for versatile mounting options (welding wire or patch).
- High conversion efficiency, up to 96%.
- Low output ripple: <30mA.
- Output accuracy: ±0.1V.
- Low no-load current: 1mA.
- Operating temperature range: -40°C to +125°C.
- Natural heat dissipation.
- Designed for easy operation and installation.
3. Technical Specifications
| Parameter Name | Parameter Value Description |
|---|---|
| Input voltage | 7V~100V (Input must be greater than output) |
| Output voltage | 5V/9V/12V/24V |
| Output current | 3A (maximum peak), long term current within 2A |
| Conversion efficiency | 96% (highest) |
| Output ripple | <30mA |
| Output accuracy | ±0.1V |
| No-load current | 1mA |
| Operating temperature | -40°C~+125°C |
| Working humidity | 20%~90% |
| Size | 25.5 x 16.5 x 7mm |
| PCB layers | 2 layers |
| Shutdown function | With shutdown function |
| Heat dissipation mode | Natural heat dissipation |
| Installation mode | Welding wire, patch |
| Isolation or not | Unisolated |
| Production technology | Reflow welding |
| Design aging standard | 720 hours without failure |
| Ex-factory aging standard | 72 hours without failure |
| Service life | 35000 hours without fault (output current does not exceed rating) |
| Inspection standard | All test (factory test + aging test + storage test) |
| Special technology | Motherboard half hole |
| Working frequency | 1MHz |
4. Setup and Installation
The DCE003 module is designed for easy integration into various projects. It supports both welding wire and patch installation methods due to its motherboard half-hole design.
4.1 Interface Description
Refer to Figure 4 for a detailed layout of the module's input and output interfaces.
- IN-: Negative input terminal.
- IN+: Positive input terminal.
- OUT-: Negative output terminal.
- OUT+: Positive output terminal.
- EN (On/off): This pin controls the module's output.
- Connect to input positive level (IN+) to turn on the output.
- Disconnect (or connect to ground) to close the output.
- By default, if the EN pin is left unconnected, the module powers on the output.
4.2 Connection Steps
- Prepare Power Source: Ensure your input power source is within the 7V-100V range and can supply sufficient current for your application. Remember, the input voltage must be greater than your desired output voltage.
- Connect Input: Connect the positive terminal of your input power source to the IN+ pin and the negative terminal to the IN- pin of the module.
- Select Output Voltage: The module offers fixed output voltages (5V, 9V, 12V, 24V). Ensure you have selected the correct variant for your needs.
- Connect Output: Connect the positive terminal of your load to the OUT+ pin and the negative terminal to the OUT- pin of the module.
- Control Output (Optional): If you wish to control the output with an on/off function, connect a switch or control signal to the EN pin. Applying a positive voltage (e.g., from IN+) will enable the output, while disconnecting it will disable the output. If no control is needed, the output will be on by default.
- Verify Connections: Double-check all connections for correct polarity and secure attachment before applying power.
5. Operating Instructions
Once properly connected, the DCE003 module operates automatically to provide a stable output voltage. The module is designed for continuous operation within its specified parameters.
5.1 Power On/Off
- Automatic Power On: If the EN pin is left unconnected, the module will automatically provide the fixed output voltage as soon as input power is applied.
- Controlled Power On/Off: To use the shutdown function, connect the EN pin to a control signal. A high logic level (e.g., connected to IN+) will enable the output, and a low logic level (e.g., disconnected or connected to ground) will disable the output.
5.2 Overheat and Overload Protection
The module includes built-in protection mechanisms:
- Overheat Protection: If the module's internal temperature exceeds safe operating limits, it will automatically shut down to prevent damage. Operation will resume once the temperature returns to a safe level.
- Overload Protection: If the output current exceeds the maximum rated value (3A peak, 2A long-term), the module will engage protection to prevent damage to itself and the connected load. Ensure your load's current draw does not consistently exceed 2A.
6. Application Scenarios
The DCE003 module's versatility and robust design make it suitable for a wide range of applications:
- Smart Home Devices
- Medical Treatment Equipment
- Industrial Internet of Things (IIoT)
- Vehicle Power Supply Systems
- Single Chip Microcomputer Motherboards
- Wireless RF Data Transmission Equipment
- General electronic projects requiring stable DC voltage conversion.
7. Maintenance
The DCE003 module is designed for long-term, maintenance-free operation. To ensure optimal performance and longevity:
- Keep Clean: Ensure the module is free from dust and debris, which can hinder natural heat dissipation.
- Environmental Conditions: Operate the module within the specified working temperature (-40°C to +125°C) and humidity (20%~90%) ranges.
- Avoid Physical Stress: Do not subject the module to excessive bending, impact, or vibration.
- Proper Ventilation: While it uses natural heat dissipation, ensure it's not enclosed in a way that severely restricts airflow, especially when operating at higher loads.
8. Troubleshooting
If you encounter issues with your DCE003 module, consider the following common troubleshooting steps:
- No Output Voltage:
- Check input voltage: Ensure the input voltage is within 7V-100V and is greater than the selected output voltage.
- Check input polarity: Verify that IN+ and IN- are connected correctly.
- Check EN pin: If using the shutdown function, ensure the EN pin is connected to a positive level to enable output. If not using it, ensure it's left unconnected (default on).
- Check for overload/overheat: The module might have shut down due to excessive load or temperature. Reduce the load or allow it to cool down.
- Check output connections: Ensure OUT+ and OUT- are correctly connected to the load and there are no short circuits.
- Unstable Output Voltage:
- Check input voltage stability: Ensure the input power source is stable and free from significant fluctuations.
- Check load current: Ensure the load current does not exceed the long-term current rating of 2A.
- Verify connections: Loose connections can cause instability.
- Module Overheating:
- Reduce load: Operating close to or above the 2A long-term current limit can cause heating.
- Improve ventilation: Ensure adequate airflow around the module.
- Check for short circuits: A short circuit on the output can cause excessive current draw and heating.
If the problem persists after these steps, consult the official support channels or the full user manual PDF for more detailed diagnostics.
9. User Tips
No specific user tips were available from customer reviews or Q&A for this product at the time of manual creation. General best practices for DC-DC converters include:
- Always double-check input/output polarity before applying power to prevent damage.
- Consider adding input and output capacitors if your application requires extremely stable power or has noisy loads.
- For high current applications, ensure good soldering practices for low resistance connections.
10. Warranty and Support
For detailed warranty information, technical support, or further inquiries, please refer to the official product documentation or contact the manufacturer/seller directly.
A comprehensive user manual in PDF format is available for download: DCE003 User Manual (PDF).
