1. Product Overview
The XY7025S is a high-performance CNC DC Buck Boost Converter designed for laboratory use, offering constant voltage and current regulation. It features a wide input/output range, MPPT solar charging support, and comprehensive protection functions, making it suitable for various applications including battery charging.
Figure 1: XY7025S CNC DC Buck Boost Converter (Main Board and Display Unit)
2. Package Contents
- 1 x DC Buck-Boost Power Supply Base Plate (Main Circuit Board)
- 1 x Display Unit
3. Safety Information and Warnings
- No Output Reverse Connection Protection: This product does not have output reverse connection protection. Connecting the battery's positive and negative poles in reverse will damage the device.
- Battery Charging Expertise: Battery charging requires specific professional knowledge. Non-professionals should not attempt to charge batteries directly without proper understanding to prevent fire and explosion hazards.
- Backflow Protection: For battery charging applications, it is recommended to connect a backflow protection diode to the output end to prevent current from flowing back into the converter.
4. Setup
4.1 Component Identification
Figure 2: Main Circuit Board Components and Connections
Refer to Figure 2 for the location of key components and connection points:
- IN+ / IN-: Input terminals for DC power supply.
- OUT+ / OUT-: Output terminals for regulated power.
- Power Switch (hard switch ON/OFF): Controls the main power to the unit.
- MPPT Hardware Switch: Activates the Maximum Power Point Tracking function, with an indicator light illuminating upon activation.
- External Temperature Sensor Interface: For connecting an optional NTC 3950B 10K external temperature probe.
- Input Common-Mode Inductors: Reduce input power ripple for low ripple output.
- High-Power, High-Temperature Iron-Silicon-Aluminum Magnetic Ring Inductors: Ensure stable operation.
- Output 2-Stage Filtering: Enhances output stability and reduces noise.
- Intelligent Temperature-Controlled Fan: With large-area ventilation heat sinks for efficient cooling.
4.2 Initial Connection
- Connect your DC input power source to the IN+ and IN- terminals. Ensure correct polarity.
- Connect your load or battery (with a backflow protection diode, if charging) to the OUT+ and OUT- terminals. Ensure correct polarity.
- Connect the display unit to the main board via the provided cable.
- If using the over-temperature protection feature for battery charging, connect the external temperature probe to the designated interface and stick the probe onto the battery.
- Ensure all connections are secure before proceeding.
5. Operating Instructions
5.1 Display Unit and Button Functions
Figure 3: Display Unit Button Functions
The display unit features silicone buttons with indicators for comfortable use and clear status indication. The power button indicates output status with red (off) and green (on) lights, and a red breathing light for power off.
| Button | Short Press Function | Long Press Function |
|---|---|---|
| VSET | Set output voltage (CV) | Quickly recall data set M1 |
| SW | Enter quick settings | Enable four-way screen rotation |
| ISET | Set output current (CC) | Enter or exit the data group settings UI |
| Encoder Button | Shift (navigate menus/parameters) | Lock the button |
| Power Button (ON/OFF) | Turn power output on/off | Shut down the device |
5.2 MPPT Solar Charging
The XY7025S supports MPPT (Maximum Power Point Tracking) solar charging. To enable this feature, activate the MPPT hardware switch on the main board. An indicator light will illuminate when MPPT is active.
5.3 Over-Temperature Protection
When an external temperature probe is connected and placed on the battery, the device supports over-temperature protection. If the battery temperature exceeds a set limit, the charging process will automatically stop to prevent damage.
6. Maintenance
The XY7025S is designed for reliable operation with minimal maintenance. Keep the device clean and free from dust. Ensure proper ventilation around the unit, especially the heat sinks and fan, to prevent overheating. No user-serviceable parts are inside the sealed unit; do not attempt to disassemble.
7. Troubleshooting
- Device Not Powering On: Check input power connections and ensure the hard power switch is in the ON position.
- No Output: Verify that the output power is turned on via the Power Button on the display unit (short press). Check for any active protection modes (see Section 8.1).
- Device Stops Charging/Output: The device may have activated an internal protection mechanism. Common reasons include:
- Over-Temperature Protection (OTP/ETP): If an external temperature probe is used, the charging will stop if the battery or internal temperature exceeds safe limits. Allow the unit to cool down.
- Input Under-Voltage Protection (LVP): The input voltage may be too low.
- Output Over-Voltage Protection (OVP): The output voltage may have exceeded the set limit.
- Output Over-Current Protection (OCP): The output current may have exceeded the set limit.
- Output Over-Power Protection (OPP): The output power may have exceeded the set limit.
- Damage from Reverse Polarity: If the battery was connected with reverse polarity to the output, the device may be permanently damaged as it lacks reverse connection protection.
8. Specifications
8.1 Protection Features
Figure 4: Multiple Protection Features
- LVP: Input Under-Voltage Protection
- OVP: Output Over-Voltage Protection
- OPP: Output Over-Power Protection
- OTP: Internal Over-Temperature Protection
- OAH: Output Over-Capacity Protection
- OHP: Output Over-Time Out Protection
- OWH: Output Over-Energy Protection
- ETP: External Over-Temperature Protection (requires external probe)
8.2 General Specifications
| Feature | Description |
|---|---|
| Model | XY7025S |
| Type | CNC DC Buck Boost Converter, Adjustable Voltage Regulator |
| Max Current | 25A |
| Max Power | 1750W |
| Display | 1.8-Inch Full-View High-Brightness True Color LCD |
| Shell Material | Integrated injection-molded, flame-retardant shell with double-buckle design |
| Dimensions (Approx.) | Length: 17 cm, Width: 9 cm, Height: 6 cm |
| Weight (Approx.) | 0.299 kg |
| Accessory Type | Battery Accessories |
Figure 5: Display Unit Features
9. User Tips
- Professional Use: Due to the nature of power electronics and battery charging, it is highly recommended that users have a certain level of professional knowledge to operate this device safely and effectively.
- Backflow Diode: When charging batteries, always consider adding an external backflow protection diode to the output to safeguard the converter.
- Temperature Monitoring: Utilize the external temperature probe feature for critical battery charging applications to prevent overheating and ensure battery longevity. Place the probe directly on the battery being charged.
- Batch Variations: Be aware that minor differences in product appearance, color, or printed text may occur between manufacturing batches, but these do not affect the functionality or performance of the device.
10. Warranty and Support
For any technical support or inquiries regarding the XY7025S CNC DC Buck Boost Converter, please contact the seller, Extraordinary Digital Store. Specific warranty details are typically provided at the point of purchase or by the seller.