Key benefits Wide input and output range: accepts DC 5–30 V input and provides a fully adjustable DC 0.5–30 V output to match many devices and battery voltages. Precise monitoring and control: builtin LCD shows input voltage, output voltage, output current, output power, output capacity and output time for easy, ataglance system monitoring. Reliable, protected operation: multiple hardware and software protections reduce risk from wiring errors, overcurrent and other abnormal conditions. Flexible power handling: designed for continuous 3 A output; with improved heat dissipation it can sustain up to 4 A. Nominal max output power is 35 W, and can reach 50 W with enhanced cooling. Main functions and features Adjustable output: output voltage can be set anywhere from 0.5 V to 30 V to suit a wide range of loads. Current capability: safe continuous output current of 3 A; 4 A achievable with improved thermal management. Power limits: rated for 35 W continuous; with better heat dissipation the module can deliver up to 50 W. LCD readout: simultaneous display of input voltage, output voltage, output current, output power, cumulative output capacity and elapsed output time. Default ON/OFF setting: module can be programmed to start in ON or OFF state. Antireverse input protection: prevents damage if input polarity is accidentally reversed. Antibackflow output protection: prevents reverse current into the module so no external antibackflow diode is required when charging. Software protections: adjustable protection thresholds (overvoltage, overcurrent, etc.). When set thresholds are exceeded the module automatically turns the output off. Compatibility and performance Function: operates as a stepup/stepdown (buck/boost) converter with overcurrent protection and precise output adjustment. Compatibility: suitable for use with batteries, USB power sources, solar panels and other DC supplies within the 5–30 V input range. Performance focus: designed for stable voltage/current delivery with realtime monitoring and configurable protection to safeguard the load and the module. Practical applications (use scenarios) 1) power LED driver: set the module as a constantcurrent source or limit the output to drive LEDs safely. Use the LCD to monitor current and power during long runs. 2) Solar power/battery charging controller: combine the module with a solar panel and battery to control charging voltage/current; antibackflow protection eliminates the need for an extra diode. 3) Generalpurpose DC power supply or converter: use it as a compact buck/boost converter for testing, prototyping, or powering 12 V/24 V devices from various DC sources. User notes For sustained operation above 3 A or near the 35 W rating, provide improved heat dissipation (heatsinking or airflow) to reach the higher current/power limits safely. Configure protection thresholds and the default ON/OFF behavior through the module's settings to match your application and protect connected batteries or loads. The antireverse and antibackflow protections simplify wiring and improve safety, but always verify polarity before connecting to avoid unnecessary stress on any components. What this module solves Eliminates the need for multiple fixedvoltage supplies by providing a wide adjustable output. Simplifies safe battery charging and LED driving with builtin antibackflow and software protections. Provides clear status and usage data on the LCD so users can monitor performance, diagnose issues and quantify delivered charge and run time.