1Overcurrent protection,more safe and reliable to use. 2Step down voltage adjustable, can be used as battery charger, constant current LED driver module. 3LCD display, dual display of voltage and current. 4With short circuit protection and input reverse polarity protection. 5Wide range of output voltage,large output current and has a maximum conversion efficiency of 95%. Item Type:Power Supply Module Model:WD5020 Input Voltage:7~50V Output Voltage:0~36V Continuous Adjustable(Can only be used as a step downmodule, the input must be greater than the output 1V or more) Output Current:Adjustable,20A Maximum(It is recommended to use it in 15A. It can naturally dissipate heat at 10A or below 140W. If it exceeds, please strengthen the heat dissipation Constant current requires output voltage of 2V or more to adjust. Current regulation can only work under constant current state.) Output Power: Up to 300W (recommended to use within 250W, please reduce power when using large differential pressure) Working Temperature: -20~+75 (pay attention to the power tube temperature when using, please strengthen the heat dissipation) Working Frequency: 300KHz Conversion efficiency: up to 95% Short Circuit Protection: Yes, constant current value currently set by constant current Input Reverse Connection Protection: Yes Output Backflow: No, please add a diode for charging Wiring Method: Terminal block or soldering terminal, VIN is input, VOUT is output Size:100 x 60 x 48mm / 3.94 x 2.36 x 1.89in Calibration method: This module has a calibration function, so you don't have to worry about the measurement display being inaccurate. Just calibrate once The module has been calibrated when left factory, if the module displayed inaccurately, you can use the following method to perform a calibration Voltage calibration: Under no-load condition, press and hold the ''+'' button, power on, enter the voltage calibration mode, the LCD screen starts to flash, release the ''+'' button, press the ''+'' button to add, ''- ''to reduce, calibrate to the correct input voltage, such as: input voltage is 12.65V, then adjust the current voltage to 12.65V, automatically save after 2 seconds, the power is off and the calibration is completed Setting instructions: The "+" button sets the display mode and is divided into three types: 1. F-0 mode: display output voltage; 2. F-1 mode: display input voltage; 3. F-2 mode: alternately display input and output voltages; Instructions for use: Press the + button to cycle through the three display modes. Press the - button to save and exit. Press the - button alone toswitch the backlight of the LCD screen. Application range (three applications) Note that the constant current adjustable current must be in the constant current mode when the actual load output current is greater than the set current. Otherwise, it will work in the constant voltage state. It is not the current adjusted to 2A, that is, any equipment will change to 2A. Know. Constant current above 2V output voltage will take effect 1.