1. Introduction
This manual provides detailed instructions for the safe and efficient operation of your XY-6506 or XY-6509 DC Step-Down Converter. This device is an adjustable regulated power supply designed to provide a stable, constant voltage output from a higher DC input voltage. It features multiple input interfaces and an intelligent temperature control fan for reliable performance.
2. Safety Information
- Ensure the input voltage is within the specified range (DC 6.0V-70V).
- WARNING: Do not connect two or more input interfaces simultaneously. This can damage the device.
- Always connect the load to the output terminals before applying power.
- Observe correct polarity when connecting input and output.
- Do not operate the device in wet conditions or expose it to extreme temperatures.
- Keep the device away from flammable materials.
- Ensure proper ventilation; do not block the exhaust fan.
- If the device malfunctions, disconnect power immediately and seek professional assistance.
3. Key Features
- Adjustable DC step-down (buck) conversion.
- Constant voltage output.
- Digital display for real-time voltage and current monitoring.
- Multiple input interfaces: PD, Power Battery, DC 5.5*2.5 plug, Plug-in Terminal.
- Intelligent temperature control fan for efficient cooling.
- Compact and robust design.
4. Specifications
| Parameter | Value |
|---|---|
| Model | XY-6506 / XY-6509 |
| Input Voltage Range | DC 6.0V - 70V |
| Output Voltage | Adjustable (Lower than input voltage) |
| Max Output Current (XY-6506) | 6.000A (as shown in display) |
| Max Output Current (XY-6509) | 9.000A (as shown in display) |
| Cooling | Intelligent Temperature Control Fan |
| Input Interfaces | PD, Power Battery, DC 5.5*2.5 plug, Plug-in Terminal |
5. Setup and Connections
Refer to the images below for a visual guide to the device's interfaces.
Figure 1: Front panel of the converter (example display: 65.00V, 6.000A)
Figure 2: Front panel of the converter (example display: 65.00V, 9.000A)
Figure 3: Rear panel with input interfaces and exhaust fan.
The rear panel features multiple input options: a PD interface (for PD charging heads, automatically activating 20V output), a power battery interface, a DC 5.5*2.5 plug input, and a plug-in terminal. An exhaust fan for intelligent temperature control is also visible. Input voltage range is DC 6.0-70V. Crucially, do not connect two or more input interfaces simultaneously.
5.1. Input Connection
Choose ONE suitable input interface from the rear panel:
- PD Interface: Connect a PD charging head. The device will automatically activate to output 20V high voltage.
- Power Battery Interface: Connect a compatible power battery.
- DC 5.5*2.5 Plug: Use a standard DC 5.5*2.5mm power adapter.
- Plug-in Terminal: For custom wiring, ensure correct polarity (positive and negative).
Important: Only use one input source at a time. Connecting multiple sources simultaneously can cause severe damage to the converter.
5.2. Output Connection
The output terminals are located on the front panel (typically red for positive, black for negative). Connect your load to these terminals, ensuring correct polarity.
6. Operation
The front panel features a digital display, control buttons (VSET, SW, ISET), a rotary encoder, and an ON/OFF button.
6.1. Power On/Off
After connecting the input and output, press the ON/OFF button to enable or disable the output power.
6.2. Setting Output Voltage (VSET)
- Press the VSET button. The voltage value on the display will start blinking.
- Rotate the encoder to adjust the desired output voltage.
- Press the encoder button briefly to switch between digits for fine adjustment.
- Press VSET again to confirm the setting and exit voltage adjustment mode.
6.3. Setting Output Current Limit (ISET)
This device operates in constant voltage mode, but you can set a current limit to protect your load.
- Press the ISET button. The current value on the display will start blinking.
- Rotate the encoder to adjust the desired maximum output current.
- Press the encoder button briefly to switch between digits for fine adjustment.
- Press ISET again to confirm the setting and exit current adjustment mode.
6.4. Display Switching (SW)
The SW button allows you to cycle through different display modes, such as input voltage, output voltage, output current, and power.
7. Maintenance
- Cleaning: Use a soft, dry cloth to clean the device. Do not use abrasive cleaners or solvents.
- Ventilation: Ensure the exhaust fan and ventilation openings are free from dust and obstructions. Periodically clean the fan if necessary.
- Storage: Store the device in a cool, dry place when not in use.
- Inspection: Regularly check all connections for tightness and signs of wear or damage.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No display/No power | No input power; incorrect input connection; input voltage too low/high. | Check input power source; ensure correct polarity; verify input voltage is within 6.0V-70V. |
| No output voltage/current | Output is OFF; output short circuit; overcurrent protection activated. | Press ON/OFF button to enable output; check load for short circuits; reduce load or increase current limit. |
| Output voltage/current unstable | Poor connections; faulty load; device overheating. | Check all wiring connections; test with a different load; ensure adequate ventilation. |
| Fan constantly running/loud | High load/temperature; fan obstruction. | This is normal under heavy load; ensure ventilation is clear. |
9. User Tips
- When using the PD interface, ensure your PD charging head can supply sufficient power for your desired output.
- Always double-check your voltage and current settings before connecting sensitive electronics.
- For long-term use at higher power, ensure the device is placed in a well-ventilated area to allow the intelligent fan to operate effectively.
10. Warranty and Support
For any issues not covered in this manual, or for warranty inquiries, please contact the seller or manufacturer directly. Keep your purchase receipt as proof of purchase.
