DROK USB Buck Converter Instruction Manual

1. Introduction

This manual provides detailed instructions for the DROK USB Buck Converter module. This DC-DC step-down module is designed to convert a higher input voltage (6-32V DC) to a stable 5V DC output, with Quick Charge 3.0 capabilities allowing for automatic voltage adjustment between 3-12V for compatible devices. It is suitable for various applications such as mobile phone charging, car charging systems, and DIY power supplies.

2. Product Features

• Input Voltage Range: DC 6V-32V
• Output Voltage: Default DC 5V; automatically adjusts to 3-12V when Quick Charge is triggered.
• Output Power: 24W maximum.
• Quick Charge Protocols: Supports BC 1.2, QC 2.0/3.0, MTK PE 1.1/PE 2.0, SFCP.
• Protection Features: Includes input over-voltage protection, input under-voltage protection, input over-current protection, output over-current protection, output short-circuit protection, and over-temperature protection.
• LED Indicator: Provides visual indication of the module's working status.

3. Specifications

4. Setup

Before connecting the module, ensure your power source is within the specified input voltage range (DC 6-32V). Observe proper polarity when making connections.

4.1 Wiring Connections

The module features screw terminals for input power and a standard USB-A port for output.

• Input+: Connect the positive (+) terminal of your DC power source here.
• Input-: Connect the negative (-) terminal of your DC power source here.
• USB Output: Connect your USB charging cable to this port.

Image: Top-down view of the DROK USB Buck Converter module, clearly indicating the 'Input+' and 'Input-' screw terminals on the left, and the 'USB Output' port on the right. The module also shows two capacitors and an inductor.

Image: Angled view of the DROK USB Buck Converter module with key dimensions labeled: 35mm length, 8.5mm height, and 17mm width. This provides a clear understanding of the module's compact size.

5. Operating Instructions

Once the module is correctly wired to a DC power source, it is ready for operation.

• Power On: Apply DC power within the 6-32V range to the input terminals. The blue LED indicator on the module will illuminate, signifying it is active.
• Connect Device: Plug your USB-compatible device (e.g., smartphone, tablet) into the USB output port using an appropriate charging cable.
• Quick Charge Functionality: If your connected device supports Quick Charge (QC 2.0/3.0, MTK PE 1.1/PE 2.0, SFCP), the module will automatically negotiate and adjust its output voltage between 3V and 12V to optimize charging speed. For devices without Quick Charge support, the output will default to 5V.

6. Maintenance

The DROK USB Buck Converter is designed for reliable operation with minimal maintenance. To ensure longevity and optimal performance:

• Keep the module in a dry environment, away from moisture and corrosive substances.
• Avoid exposing the module to extreme temperatures or direct sunlight.
• Periodically inspect connections for tightness and ensure no debris accumulates on the circuit board.
• Do not attempt to modify the module, as this may void the warranty and pose safety risks.

7. Troubleshooting

If you encounter issues with your DROK USB Buck Converter, refer to the following troubleshooting steps:

• No Output/LED Off:
  • Verify that the input power source is connected correctly and providing voltage within the 6-32V DC range.
  • Check the polarity of the input connections (Input+ to positive, Input- to negative).
  • Ensure the power source is active and supplying sufficient current.
• Device Not Fast Charging:
  • Confirm that your device and charging cable support one of the Quick Charge protocols (QC 2.0/3.0, MTK PE 1.1/PE 2.0, SFCP).
  • Some devices may require specific cables for fast charging. Try a different cable.
• Protection Features Triggered (LED blinking or output cut off):
  • Over/Under Voltage Protection: If the input voltage exceeds 32V or drops below 6V, the module will activate protection. Adjust the input voltage to be within the specified range (as shown in the video from 0:15 to 0:44).
  • Over Current Protection: If the output current exceeds the maximum limit (e.g., 24W), the module will protect itself. Reduce the load on the USB output (as shown in the video from 0:45 to 0:59).
  • Short Circuit Protection: A direct short on the output will trigger protection. Remove the short circuit immediately (as shown in the video from 0:45 to 0:59).
  • Over Temperature Protection: Prolonged operation under heavy load or in a high ambient temperature may cause the module to overheat and trigger protection. Allow the module to cool down and ensure adequate ventilation (as shown in the video from 1:00 to 1:03).

8. Safety Information

Please read and understand the following safety precautions before using the DROK USB Buck Converter:

• Do not exceed the specified input voltage range of DC 6-32V. Exceeding this range can damage the module and connected devices.
• Ensure correct polarity when connecting input power. Incorrect polarity can cause irreversible damage.
• Avoid short-circuiting the output terminals. The module has short-circuit protection, but repeated or prolonged short circuits can reduce its lifespan.
• Operate the module in a well-ventilated area to prevent overheating, especially under heavy loads.
• Keep the module away from children and pets.
• If the module shows signs of damage, discontinue use immediately.

9. Warranty and Support

DROK products are designed for quality and reliability. This product is covered by a one-year warranty from the date of purchase against defects in materials and workmanship. If you experience any issues or require technical assistance, please contact DROK customer support through the retailer where the product was purchased or visit the official DROK website for contact information.

Please retain your proof of purchase for warranty claims.