SX1308 DC-DC Boost Converter Step-Up Adjustable Power Module - 2V-24V to 3V-28V 2A 1.2MHz High Efficiency Voltage Regulator Board for DIY Electronics and Arduino Projects

The SX1308 DC-DC Boost Converter is a highly efficient, compact, and versatile step-up voltage regulator module designed for DIY electronics, hobbyist projects, and prototyping. Built around the high-performance SX1308 active integrated circuit, this module is capable of stepping up low input voltages starting from as low as 2V up to a stable, adjustable output of up to 28V. Whether you need to power a 12V relay from a single-cell lithium battery or drive a 24V LED strip from a standard 5V USB power source, this booster module provides a reliable and space-saving solution. Its high switching frequency and internal low-resistance power MOSFET ensure minimal energy loss and excellent thermal performance in a wide range of applications.

At the heart of this module is the SX1308 converter chip, which operates at a fixed switching frequency of 1.2MHz. This exceptionally high frequency is a key technical advantage, as it allows the use of tiny, low-profile external inductors and ceramic capacitors. Consequently, the entire module maintains an ultra-small footprint while delivering clean, low-ripple DC output. The internal power switch is an N-channel MOSFET with a very low on-resistance (RDS(on)), which minimizes conduction losses and enables conversion efficiencies up to 95%. The module features an onboard multi-turn precision potentiometer (trimpot). By rotating the screw on this potentiometer, users can fine-tune the output voltage to their exact requirements. Additionally, the SX1308 chip incorporates several safety mechanisms, including cycle-by-cycle current limiting to prevent over-current damage, under-voltage lockout (UVLO) to protect batteries from deep discharge, and thermal shutdown protection that disables the device if the internal junction temperature exceeds safe operating limits.

• Input Voltage Range: 2V to 24V DC
• Maximum Output Voltage: Up to 28V DC (adjustable via potentiometer)
• Maximum Output Current: 2A (recommended continuous current is lower, depending on thermal dissipation)
• Switching Frequency: 1.2MHz typical
• Maximum Efficiency: Up to 95%
• Internal MOSFET On-Resistance: Varies by module revision, check datasheet for exact silicon parameters
• Under-Voltage Lockout (UVLO): Varies by module revision, check datasheet
• Operating Temperature Range:
• 40 degrees Celsius to +85 degrees Celsius
• Storage Temperature Range:
• 55 degrees Celsius to +150 degrees Celsius
• Module Dimensions: Varies by module revision, check datasheet for exact physical dimensions
• Weight: Varies by module revision, check datasheet

This adjustable boost converter is widely used in a variety of electronic designs and systems. Common applications include:

• Portable Battery-Powered Systems: Stepping up single-cell Li-Po (3.7V) or AA/AAA battery packs to 5V, 9V, or 12V to power microcontrollers and sensors.
• Arduino and Raspberry Pi Projects: Providing auxiliary power rails for high-voltage peripherals like servos, solenoids, relays, and LCD screens.
• LED Driving: Powering high-voltage LED arrays or strips from low-voltage USB ports or power banks.
• Wireless Communication Modules: Ensuring stable voltage supply for power-hungry RF transmitters, Wi-Fi modules, or cellular modems.
• DIY Power Supplies: Creating a compact, adjustable bench power supply for testing low-power electronic circuits on a breadboard.

To integrate the SX1308 step-up module into your project, follow these essential guidelines:

1. Connection: Solder your input power wires to the VIN+ (positive input) and VIN- (negative ground) pads. Connect your load to the VOUT+ (positive output) and VOUT- (negative ground) pads. Double-check polarities before applying power, as reverse polarity can permanently damage the module.

2. Initial Calibration: When using the module for the first time, you may need to turn the brass screw on the multi-turn potentiometer counter-clockwise for 10 to 20 full rotations before you observe any change in the output voltage. This is normal behavior for precision trimpots.

3. Voltage Constraints: This is a step-up (boost) converter only. The input voltage must always be lower than the desired output voltage. Applying an input voltage higher than the set output voltage will result in the input voltage passing directly to the output (minus diode drop) without regulation, which may damage connected components.

4. Thermal Management: While the module is rated for up to 2A peak current, continuous operation at high currents or high voltage differentials will generate heat. If the module becomes hot to the touch during operation, it is highly recommended to reduce the load, add a small heatsink to the SX1308 IC, or provide active cooling (such as a small fan) to prevent thermal shutdown.

1 x SX1308 DC-DC Adjustable Step-Up Boost Converter Module