The power module adopts the plug-in LM2596HV, the high voltage version of the LM2596.The maximum input voltage is 50V (limited by the filter capacitor withstand voltage).The external heat sink can withstand high current operation.The input terminal uses a 4A rectifier bridge stack to input AC power,and has a dedicated DC input port, which is commonly used for AC and DC input.The output voltage can be adjusted from 3.3V to 33V,and the output voltage will vary with different input voltage ranges. Input AC voltage AC5V-AC30V or DC5V-50V, due to the fluctuation of AC voltage, the recommended AC voltage range has reserved margin. The power module has a maximum input voltage of 50V (limited by the filter capacitor withstand voltage) and a heat sink. The output current can work stably at 2.2A output current for a long time, and can work at 3A output current for a short time. The front of the PCB has the name of the silk screen terminal, and the back side also has the name of the silk screen terminal. When soldering the lead, please recognize it and solder it to prevent damage. Electrical Parameters: Input voltage range: AC 5V-30V, DC 5V-50V Output output range: DC 3.3V-33V Output current range: up to 2.2A (the regulator chip can withstand a maximum current of 3A, can work at 3A output current for a short time Module size: 51mmx26mm Colour: as shown Material: PC+metal Package Contents: 5 * LM2596 power Supply module Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.