LM2596 Adjustable Buck Converter CC CV 5-35V to 1.25-30V 2.5A

DC-DC Buck Converter for low-power applications where you need to reduce the voltage from up to 35V and also have the ability to adjust the output current.

Applications:

-LED Driver
-Battery charger
-Solar panels and wind turbines

Triple Potentiometer Control System

This buck converter features three precision potentiometers for complete control over voltage and current parameters. Turning clockwise increases, and anticlockwise decreases. Sometimes to activate the converter 20+ turns are needed.

Potentiometer 1 (P1) – Voltage Adjustment: Continuously adjustable output voltage from 1.25V to 30V, allowing precise voltage regulation for your specific application requirements.

Potentiometer 2 (P2) – Charging Cut-off Control: When charging batteries, this potentiometer adjusts the current threshold at which charging automatically stops. For example, when a battery reaches full charge, the current drawn from the buck converter drops significantly. With P2, you can set the cut-off current to stop feeding the battery, preventing overcharging.

Potentiometer 3 (P3) – Current Adjustment: Sets the maximum output current up to 2.5A. This is essential for LED applications where excessive current flow can cause overheating and damage. LEDs are sensitive to current limits, and exceeding manufacturer specifications leads to reduced lifespan or complete failure. By limiting the current with P3, you ensure safe operation within the LED’s rated parameters.

Specifications of the DC DC Converter:

• Non-isolated
• Non-synchronous rectification
• Input voltage: 5-35V
• Output voltage: 1.25-30V continuously adjustable
• Output current: adjustable, up to 2.5A
• Working temperature: -40 ~ 85 °C
• Conversion efficiency: up to 95%
• Short circuit protection: Yes
• Overheating protection: Yes (automatically shuts down the output after overheating)

Size: 48 x 24 x 13 mm

CV / CC Module Features

This converter operates in both Constant Voltage (CV) and Constant Current (CC) modes, making it ideal for battery charging applications and LED driver circuits. The dual-mode operation ensures safe, efficient power delivery regardless of load conditions.

The compact 48 x 24 x 13 mm form factor fits easily into tight spaces while delivering up to 95% conversion efficiency. Built-in short circuit and overheating protection with automatic shutdown ensures reliable operation across the full -40 to 85°C temperature range.