Feature 1 Overcurrent protection,more safe and reliable to use. 2 Step down voltage adjustable, can be used as battery charger, constant current LED driver module. 3 LCD display, dual display of voltage and current. 4 With short circuit protection and input reverse polarity protection. 5 Wide range of output voltage,large output current and has a maximum conversion efficiency of 95%.Item Type:Power Supply ModuleModel:WD5020Input Voltage:7~50VOutput Voltage:0~36V Continuous Adjustable(Can only be used as a step down module, 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: 300KHzConversion efficiency: up to 95%Short Circuit Protection: Yes, constant current value currently set by constant currentInput Reverse Connection Protection: YesOutput Backflow: No, please add a diode for charging! Wiring Method: Terminal block or soldering terminal, VIN is input, VOUT is outputSize: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. Use as a normal step-down module with overcurrent protectionInstructions:(1) Under no-load conditions, adjust the constant piezoelectric device CV to make the output voltage reach the desired voltage value;(2) Connect the load, connect the line with a thick point, adjust the "constant current potentiometer " counterclock is to reduce the size, the default factory is 10A, if the actual need is lower than the constant current 10A output, you need to adjust the counter clock The loop current display will change. (The current value displayed by the ammeter is 4A, then the maximum current of the module is limited to 4A, and the red indicator light of the constant current indicator lights when the current reaches 4A)2. Use as a battery chargerInstructions:The important thing: Many parents have received the MOS tube when they first started using it. In particular, they are used to recharge the battery and connect the motor to the motor. Remember to add a diode to the output of the module to prevent backflow. Reflow must be burned, diodes are available for sale! Remember, remember! !(1) Determine the float voltage and charge current of the battery; (If the lithium battery parameter is 3.7V/2200mAh, then the float voltage is 4.2V, and the maximum charge current is 1C, ie 2200mA)(2) Under no-load conditions, adjust the "constant piezoelectric positioner CV" to make the output voltage reach the float voltage;(3) The battery is connected to the back end of the anti-backflow diode. The connected line is thick. Adjust the constant current potentiometer . The reverse clock is turned down. The default factory is 10A. If the actual output is lower than the constant current 10A output, It takes a few turns of the reverse clock to adjust the current display to change. (The current value displayed by the ammeter is 4A, then the maximum current of the module is limited to 4A, and the red indicator light of the constant curr