Introduction
This manual provides instructions for the DollaTek Mini DC-DC Boost Converter Module. This module is designed to step up a low input voltage from a lithium battery (e.g., 3.7V) to a higher, adjustable output voltage (5V, 8V, 9V, or 12V). It is suitable for various DIY electronic projects requiring a stable higher voltage supply from a lower voltage source.
Module Overview
The module features input and output terminals, voltage selection pads, and an LED indicator. Understanding these components is crucial for proper operation.
Image 1: DollaTek Mini DC-DC Boost Converter Module with key components labeled. This image shows the SS14 Schottky diode, 3R3 chip inductor, wiring interfaces, and the LED indicator.
Image 2: Underside of the DollaTek Mini DC-DC Boost Converter Module, illustrating the A and B pads for output voltage selection (5V, 8V, 9V, 12V).
Setup and Connection
Before connecting the module, ensure your input voltage source is within the specified range and that the output voltage is set correctly for your application.
- Identify Terminals: Locate the input terminals (marked 'IN' or '+' and '-') and output terminals (marked 'OUT' or '+' and '-'). Refer to Image 1 for visual identification.
- Set Output Voltage: The default output voltage is 12V. To change the output voltage, refer to the "Voltage Adjustment" section below. This step should be performed before applying power.
- Connect Input Power: Connect your DC input power source (e.g., a 3.7V lithium battery) to the input terminals. Ensure correct polarity: positive to '+' and negative to '-'. The input voltage range is 2.5V to 5V. Important: The input voltage must be lower than the desired output voltage.
- Connect Load: Connect your device or circuit requiring the boosted voltage to the output terminals. Ensure correct polarity.
- Power On: Once all connections are secure and verified, apply power to the input. The LED indicator on the module will illuminate (if not disabled) to show operation.
Operating Instructions
Voltage Adjustment
The output voltage of the module can be adjusted to 5V, 8V, 9V, or 12V by modifying the solder pads labeled 'A' and 'B' on the PCB. The default setting is 12V. To change the voltage, use a soldering iron to connect or disconnect the pads as per the table below. '0' indicates the pad is disconnected (open), and '1' indicates the pad is connected (shorted).
| Pad A | Pad B | Output Voltage (VOUT) |
|---|---|---|
| 0 (Open) | 0 (Open) | 5V |
| 0 (Open) | 1 (Shorted) | 8V |
| 1 (Shorted) | 0 (Open) | 9V |
| 1 (Shorted) | 1 (Shorted) | 12V (Default) |
The pad next to the LED indicator can also be disconnected to turn off the LED, reducing quiescent current if desired.
LED Indicator
The module includes an LED indicator that illuminates when power is applied and the module is operating. This LED consumes approximately 1mA when the output is 12V. If the indicator is disabled, the input current without a load is less than 1mA.
Maintenance
The DollaTek Mini DC-DC Boost Converter Module is a low-maintenance electronic component. No regular maintenance is required. Keep the module clean and free from dust and moisture. Avoid physical stress or impact to prevent damage to the delicate electronic components.
Troubleshooting
- No Output Voltage / LED Not Lit:
- Check input power source: Ensure it is connected correctly and providing voltage within the 2.5V-5V range.
- Verify polarity: Double-check that input and output connections respect polarity (+ to +, - to -).
- Confirm voltage setting: Ensure the A/B pads are configured correctly for the desired output voltage.
- Input voltage must be lower than output voltage: The boost converter requires the input to be lower than the target output.
- Module Overheating:
- Check load current: Ensure the connected load does not exceed the module's maximum output current capacity for the given input voltage (e.g., 0.3A at 12V output with 3.7V input).
- Verify input voltage: Operating at the lower end of the input voltage range for a high output current can increase heat generation.
- Ensure adequate ventilation: Allow for proper airflow around the module, especially under heavy loads.
- Output Voltage Unstable or Incorrect:
- Re-check A/B pad configuration: Ensure solder connections are clean and correct according to the voltage adjustment table.
- Inspect solder joints: Poor solder joints can lead to intermittent connections.
- Consider adding an output capacitor: For loads with high impulse currents, an additional capacitor at the output may improve stability.
Specifications
- Input Voltage Range: 2.5V - 5V DC (Input voltage must be lower than the set output voltage)
- Output Voltage: Adjustable to 5V, 8V, 9V, 12V (Default: 12V)
- Output Capacity (with 3.7V Lithium Battery Input):
- 5V: 1A
- 8V: 0.5A
- 9V: 0.45A
- 12V: 0.3A
- Output Capacity (with 5V Input):
- 8V: 0.7A
- 9V: 0.7A
- 12V: 0.5A
- LED Indicator Current: Approximately 1mA (at 12V output). Less than 1mA without load if indicator is off.
- Dimensions: 22 mm x 11 mm (0.87 inches x 0.43 inches)
- Material: Electronic components
- Model Number: 6543815031
- Brand: DollaTek
Image 3: Dimensions of the DollaTek Mini DC-DC Boost Converter Module, showing its compact size of 22mm by 11mm.
Warranty and Support
Specific warranty information is not provided in the product details. For any technical support or inquiries regarding the DollaTek Mini DC-DC Boost Converter Module, please contact your retailer or the manufacturer directly. Ensure to provide your product model number (6543815031) and purchase details for efficient assistance.
