Walfront Programmable Adjustable Regulated Power Supply Module

1. Introduction

Thank you for choosing the Walfront Programmable Adjustable Regulated Power Supply Module. This versatile DC-DC buck-boost converter is designed for electronic equipment, mechanical engineering, and motor applications, offering precise and adjustable voltage and current output. This manual provides essential information for the safe and effective operation of your module.

Please read this manual thoroughly before operating the device and keep it for future reference.

2. Safety Information

To ensure safe operation and prevent damage to the module or connected equipment, please observe the following precautions:

• Input/Output Short Circuit: The module input IN- must not be short-circuited with output OUT-, otherwise the constant current function will fail.
• Power Supply Capacity: Always ensure that the power of the input power supply is greater than the power required by the output load.
• Input Voltage for Full Load: If the module is to output at full load, the input voltage must be above 8V. When the input voltage is 5V, the output power is approximately 15W.
• Current Limitation: The maximum current value of the module is 4A, provided that it is limited by the maximum output power. For example, when the output is 17V, the current should not be greater than 2A.
• Heat Dissipation: When using this module over 3A or 35W, it is crucial to strengthen heat dissipation to prevent overheating.
• Under-Voltage Protection: The module has an input under-voltage protection function, default is about 4.8V (adjustable). When the input voltage drops below this value, the output will automatically disconnect. Be aware of voltage drop on input wires, especially with large input currents.
• Reverse Polarity Protection: The input terminal features anti-reverse protection; reverse connection will not burn the module.
• Output Anti-Backflow: The output terminal has anti-backflow protection, eliminating the need for an external anti-backflow diode when charging batteries.

3. Product Overview

The Walfront Power Module is a highly efficient and stable DC-DC converter with programmable features. It allows for precise adjustment of output voltage and current, making it suitable for a wide range of applications.

Figure 3.1: Walfront Power Module. This image shows the compact design of the power module, featuring a digital display for voltage and current readings, along with control buttons for adjustment and mode selection. The module includes input and output terminals for connection.

Key Features:

• Precise & Fast Adjustment: Numerical control adjustment for precise and fast voltage (0.5-30V) and current (0-4A) regulation.
• Input Terminal Anti-Reverse Protection: Prevents damage from incorrect input polarity.
• Low Output Ripple: Features π-type filtering for clean output.
• Output Anti-Backflow Protection: Safe for battery charging without external diodes.
• Stable Performance: Equipped with multiple software protection mechanisms and a thicker heat sink for enhanced stability.
• Automatic Protection: Automatically shuts off output if operating parameters exceed protection thresholds.

4. Setup

Follow these steps for initial setup of your power module:

1. Identify Terminals: Locate the input (IN+ / IN-) and output (OUT+ / OUT-) terminals on the module.
2. Connect Input Power: Connect your DC power source to the IN+ and IN- terminals. Ensure the input voltage is within the specified range (DC 5.5-30V or 6.0-36V depending on model variant). Observe polarity.
3. Connect Load: Connect your electronic equipment or load to the OUT+ and OUT- terminals. Ensure the load's power requirements do not exceed the module's output capabilities.
4. Verify Connections: Double-check all connections to ensure they are secure and correctly polarized before applying power.

5. Operating Instructions

The module features numerical control for precise adjustment of output voltage and current.

5.1. Power On/Off

• Apply input power to turn on the module. The display will illuminate.
• Remove input power to turn off the module.

5.2. Adjusting Output Voltage and Current

Specific button functions may vary slightly by model variant (4KX/5KX), but generally involve dedicated buttons for voltage and current adjustment, and possibly a mode button to switch between setting modes.

• Use the designated voltage adjustment buttons (e.g., UP/DOWN arrows or rotary encoder) to set the desired output voltage (0.5-30V or 0.6-36V).
• Use the designated current adjustment buttons to set the desired output current limit (0-4A or 0-5A). This acts as a constant current limit.
• The digital display will show the current output voltage and current.

5.3. Calibration Notes

• Voltage Calibration: To ensure accuracy, voltage calibration should be performed with a voltage above 12V.
• Current Calibration: To ensure accuracy, current calibration should be performed with a current above 1A.

6. Maintenance

The Walfront Power Module is designed for reliable operation with minimal maintenance. Follow these guidelines to ensure its longevity:

• Cleaning: Keep the module clean and free from dust and debris. Use a soft, dry cloth for cleaning. Do not use liquid cleaners or solvents.
• Ventilation: Ensure adequate airflow around the module, especially when operating at higher power levels, to facilitate heat dissipation. Do not block ventilation holes.
• Storage: When not in use for extended periods, store the module in a cool, dry place away from direct sunlight and extreme temperatures.
• Heat Sink: Periodically check the heat sink for any accumulation of dust that might impede heat dissipation. Clean gently if necessary.

7. Troubleshooting

If you encounter issues with your power module, refer to the following common problems and solutions:

8. Specifications

Technical specifications for the Walfront Power Module:

9. Warranty and Support

Specific warranty information for this product is not provided in the available data. For warranty claims or technical support, please contact your retailer or the manufacturer, Walfront, directly through their official channels. Please have your purchase details and product model information ready when contacting support.