1. Introduction
This manual provides detailed instructions for the safe and efficient operation of your GODIYMODULES 90W DC-DC Buck-Boost Converter. This module is a versatile, regulated power supply designed for various applications requiring adjustable constant voltage and constant current output. It features a clear 1.8-inch display, multiple protection functions, and data storage capabilities.
2. Safety Information
Please read and understand all safety warnings and operating instructions before using this product. Failure to do so may result in electric shock, fire, or serious injury.
- Ensure the input voltage is within the specified range of 6-36V. Exceeding this range can damage the device.
- Do not operate the module in wet conditions or expose it to moisture.
- Always connect the input and output wiring correctly, observing polarity. The module features input and output anti-reverse connection protection, but incorrect wiring can still lead to issues.
- Do not exceed the maximum output current of 5A or output power of 90W.
- Ensure proper ventilation, especially during high-power operation, to prevent overheating. An external fan port is available for additional cooling.
- Keep out of reach of children.
- If the module shows signs of damage or malfunction, discontinue use immediately.
3. Product Overview
3.1 Features
- Input Voltage Range: 6-36V DC
- Output Voltage Range: 0.5-36V DC (Adjustable)
- Output Current Range: 0-5A (Adjustable)
- Maximum Output Power: 90W
- Voltage Resolution: 0.01V
- Current Resolution: 0.001A
- Voltage Accuracy: ±0.3% + 3 words (Calibratable)
- Current Accuracy: ±0.5% + 3 words (Calibratable)
- Display: 1.8-inch upgraded large screen (36 x 29mm visual range)
- Data Storage: 11 sets of data presets (M0-M10)
- Protection Functions: Input anti-reverse connection, Output anti-reverse, Output Overvoltage Protection (OVP), Output Overcurrent Protection (OCP), Output Overpower Protection (OPP), Overtemperature Protection (OTP), Undervoltage Protection (UVP), Time/Capacity limits.
- Modes: Constant Voltage (CV) and Constant Current (CC) modes.
- Construction: Gold-plated PCB for durability, silicone buttons.
- Cooling: Integrated fan and external fan port.
3.2 Components and Controls
The module features a user-friendly interface with a display, control buttons, and a rotary encoder for precise adjustments.
Figure 1: Front panel of the converter, showing the display, M/↑, V-SET, I-SET, OK/↓ buttons, and the rotary encoder. The display shows voltage, current, and power readings.
Figure 2: Rear view of the converter, highlighting the integrated cooling fan and the green terminal block for input and output connections.
- Display Screen: Shows real-time input/output voltage, current, power, and protection status.
- M/↑ Button: Short press to call up data group settings. Long press for OVP (Overvoltage Protection) setting.
- V-SET Button: Short press to enter voltage setting. Long press for OVP setting.
- I-SET Button: Short press to enter current setting. Long press for OCP (Overcurrent Protection) setting.
- OK/↓ Button: Short press to turn on/off output. Long press for sleep shutdown.
- Rotary Encoder: Short press to select setting bit. Long press to open/cancel lock function. Rotate left/right to switch display interface or adjust values.
- Terminal Block: For connecting input power and output load.
4. Setup
4.1 Mounting
The module is designed for panel mounting. Refer to the diagram below for suggested opening dimensions.
Figure 3: Product dimensions and suggested panel opening size for installation.
4.2 Wiring Connections
Connect your input power source and output load to the green terminal block. Ensure correct polarity.
- Input Power: Connect your DC power source (6-36V) to the input terminals. The module has input anti-reverse connection protection.
- Output Load: Connect your device or load to the output terminals. The module has output anti-reverse protection.
- External Fan (Optional): If continuous high-power operation is expected, connect an external cooling fan to the dedicated fan port.
5. Operating Instructions
5.1 Power On/Off
- Power On: Connect the input power source. The display will light up.
- Turn Output On/Off: Short press the OK/↓ button to toggle the output power.
- Sleep Shutdown: Long press the OK/↓ button to enter sleep mode. Press any button to wake up.
5.2 Setting Voltage and Current
Figure 4: Steps for setting output voltage and current, and calling out data group presets.
- Setting Voltage:
- Short press the V-SET button to enter voltage setting mode. The voltage value will blink.
- Rotate the rotary encoder to adjust the voltage value. Short press the encoder to shift the digit being adjusted.
- Short press V-SET or OK/↓ again to exit the setting mode.
- Setting Current:
- Short press the I-SET button to enter current setting mode. The current value will blink.
- Rotate the rotary encoder to adjust the current value. Short press the encoder to shift the digit being adjusted.
- Short press I-SET or OK/↓ again to exit the setting mode.
5.3 Data Group Settings (Memory Presets)
The module can store up to 11 sets of data (M0-M10) including voltage, current, and protection parameters.
- Call Out Data Group:
- Short press the M/↑ button to enter the data group settings interface.
- Rotate the rotary encoder to switch between data groups M0-M10.
- Press OK/↓ to confirm and exit, applying the selected preset.
- Saving Data Group: To save current settings to a data group, adjust your desired voltage and current, then navigate to the data group interface using the M/↑ button, select the desired memory slot (M0-M10) with the rotary encoder, and long press the M/↑ button to save.
5.4 Quick Settings for OVP/OCP (Overvoltage/Overcurrent Protection)
Figure 5: Steps for quickly setting Overvoltage Protection (OVP) and Overcurrent Protection (OCP) limits, and illustrations for display switching and the locking function.
- Setting OVP: Long press the V-SET button to enter OVP settings. Short press the rotary encoder to shift digits, rotate to adjust the value. Press V-SET or OK/↓ to exit.
- Setting OCP: Long press the I-SET button to enter OCP settings. Short press the rotary encoder to shift digits, rotate to adjust the value. Press I-SET or OK/↓ to exit.
5.5 Switching Display Interface
Rotate the rotary encoder on the normal display interface to cycle through different display screens, which may include graphs, detailed protection settings, and other parameters.
5.6 Locking Function
To prevent accidental changes to settings:
- Lock: On the normal display interface, long press and hold the rotary encoder for 2 seconds to lock the set voltage and current. A lock symbol will appear on the screen.
- Unlock: Long press and hold the rotary encoder for 2 seconds again to unlock.
- Note: Even when locked, the OK/↓ button can still operate normally, allowing you to turn the output on/off.
6. Maintenance
- Cleaning: Use a soft, dry cloth to clean the module. Do not use liquids or abrasive cleaners.
- Ventilation: Ensure the cooling fan and ventilation openings are free from dust and obstructions. Clean regularly if operating in dusty environments.
- Storage: Store the module in a dry, cool environment when not in use.
- Calibration: The voltage and current accuracy are calibratable. Refer to advanced user guides or manufacturer support for calibration procedures if needed.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No display/No power | Input power not connected or incorrect voltage; faulty wiring. | Check input power source (6-36V). Verify all wiring connections for correct polarity and secure contact. |
| Output not turning on | Output disabled; protection triggered (OVP, OCP, etc.). | Short press OK/↓ to enable output. Check display for protection indicators (e.g., OVP, OCP) and adjust settings or load accordingly. |
| Output voltage/current unstable | Input power fluctuations; excessive load; poor connections. | Ensure stable input power. Reduce load if exceeding specifications. Check wiring for loose connections. |
| Module gets hot during operation | High power output; insufficient ventilation. | Ensure adequate airflow around the module. Consider connecting an external fan to the fan port for continuous high-power operation (above 60W). |
| Unexpected current draw on output when source removed | Internal design characteristic (as noted in a review). | This is a known characteristic (approx. 7mA). Consider adding a switch or disconnecting the load if this is an issue for your application. |
| Module damaged when charging protected batteries | Voltage spike from battery BMS hitting upper limit. | When charging protected batteries, set the voltage limit below the full charge voltage of the battery to prevent voltage spikes. |
8. Specifications
| Parameter | Value |
|---|---|
| Brand | GODIYMODULES |
| Model | SK90C |
| Input Voltage | 6-36V DC |
| Output Voltage | 0.5-36V DC |
| Output Current | 0-5A |
| Output Power | 90W (Max) |
| Voltage Resolution | 0.01V |
| Current Resolution | 0.001A |
| Voltage Accuracy | ±0.3% + 3 words |
| Current Accuracy | ±0.5% + 3 words |
| Screen Size | 1.8 inch (36 x 29mm visual range) |
| Data Set Storage | 11 sets (M0-M10) |
| Input Anti-Reverse Connection | Yes |
| Output Anti-Reverse | Yes |
| Mounting Type | Surface Mount |
| Item Weight | 0.12 kg |
9. Warranty and Support
For warranty information, technical support, or service inquiries, please contact GODIYMODULES directly or refer to their official website. Keep your purchase receipt for warranty claims.
