This module uses external high power MOS, encapsulates large current and high voltage Schottky diode, and enhances heat dissipation and copper coating. The performance is better than that of XL6009/LM2577. When the output voltage is set, it does not change with the input voltage. Current can be set to limit the output current, constant current drive, battery charging and other occasions. With its own output anti-backfilling function, no anti-backfilling diode is added when charging the battery.