LM2596 DC-DC Buck Converter Module with Dual USB Output
Overview: The LM2596 DC-DC Buck Converter Module is a versatile, adjustable step-down power supply board designed to convert higher input voltages to a stable lower output, featuring dual USB ports for convenient charging or powering of devices. Based on the LM2596 IC, this compact module offers efficient voltage regulation with up to 92% efficiency, making it perfect for reducing battery or solar panel voltages to power USB gadgets, microcontrollers, or DIY electronics projects. The red PCB design includes a potentiometer for fine-tuning output voltage and robust capacitors for stable performance.
Key Specifications:
Parameter
Value/Detail
IC Chip
LM2596 (Buck Converter)
Input Voltage Range
4.5V – 40V DC
Output Voltage Range
1.25V – 37V DC (adjustable via potentiometer)
Output Current
2A max (continuous; derate above 1.5A)
Output Power
Up to 15W max
Efficiency
Up to 92% (peak at mid-range loads)
Switching Frequency
150kHz (low ripple)
USB Output
5V DC (fixed, 2.1A max per port)
Dimensions
Approx. 60mm x 26mm x 15mm
Weight
~20g
Operating Temperature
-40°C to +85°C
Connections:
Input (VIN+/VIN–): Screw terminals or pin headers for 4.5V-40V DC input (positive to VIN+, ground to VIN–).
Output (VOUT+/VOUT–): Screw terminals for adjustable output (1.25V-37V) or direct connection to load.
USB Ports (x2): Dual 5V USB outputs (2.1A max per port) for charging phones, tablets, or powering USB devices.
Adjustment: Rotate the onboard multi-turn potentiometer with a screwdriver to set the desired output voltage (clockwise to increase).
Features and Benefits:
Wide Input Range: Steps down from 4.5V to 40V, accommodating various power sources like car batteries or solar panels.
Dual USB Charging: Two high-current USB ports provide 5V output for simultaneous device charging with up to 2.1A per port.
High Efficiency: LM2596 IC with inductor and capacitors ensures minimal power loss and stable output under load.
Adjustable Output: Fine-tune voltage from 1.25V to 37V for custom applications without external regulators.
Compact and Durable: Red PCB with gold-plated contacts and a heat-resistant design for reliable long-term use.
Built-in Protection: Includes over-temperature and short-circuit protection for safe operation.
Applications:
Charging smartphones, tablets, or power banks from 12V/24V sources.
Powering Arduino, Raspberry Pi, or sensors with adjustable voltage.
Solar power regulation for battery charging systems.
Automotive accessory power supplies and LED drivers.
DIY electronics and hobbyist projects requiring stable DC output.
Note: Adjust output voltage with no load connected using a multimeter, and avoid exceeding 2A to prevent overheating (add heatsink if needed). Input must be higher than the desired output for buck conversion.
