Features 1.The buck converter has a wide input voltage range of 6V‑40V and can accurately adjust the output voltage and current. 2.The efficiency measured at 20A can convert 96V to 12V, and the efficiency is as high as 96%. 3.adopts 75V/80A high-current dual MOS tube design, input and output adopt high-frequency low-resistance electrolytic capacitors, low ripple and stable output. 4.These high current 30A screw terminals are convenient for wiring, and the buck module has 2 heat sinks to enhance the heat dissipation effect. 5.When there is a big difference between the input and output voltage, please reduce the power and current. Specification Item Type: Power Supply Module Introduction to Synchronous Rectification Technology: Synchronous rectification is a new technology that uses special power MOSFETs with extremely low on-state resistance to replace rectifier diodes to reduce rectification losses. It can greatly improve the efficiency of the DC/DC converter and there is no dead zone voltage caused by the Schottky barrier voltage. Power MOSFET is a voltage-controlled device, and its volt-ampere characteristic when it is turned on is linear. When using a power MOSFET as a rectifier, the gate voltage must be synchronized with the phase of the rectified voltage to complete the rectification function, so it is called synchronous rectification. Synchronous rectification technology is to greatly reduce the rectification loss at the output of the switching power supply, thereby improving the conversion efficiency and reducing the heating of the power supply itself. Module Parameters: Module Nature: Synchronous rectification, non-isolated buck constant current constant voltage module, CC CV charging module Scope of Application: High-power LED constant current drive, lithium battery charging (including ferroelectric), 4V, 6V, 12V, 14V, 24V battery charging, nickel-cadmium nickel-metal hydride battery (battery pack) charging, solar panels, wind generators Input Voltage: DC6-40V Output Voltage: Continuously adjustable (1.2-35VDC) for a long time below 32V (applicable to applications where the input voltage is higher than the output voltage and cannot be boosted) Output Current: Maximum 20A, within 15A for a long time (the temperature of the power tube exceeds 65 degrees, please add a fan to dissipate heat, please use derating for high voltage output) Current Limit Range: 0.2-20A (regulation) module, please add a fan if it exceeds 65 degrees. Minimum Pressure Difference: 3V Working Frequency: 150KHZ Conversion Efficiency: Up to about 96% efficiency is related to pressure difference and use environment Output Ripple: Ripple around 50mV (no noise) 20M bandwidth (for reference only) 24V input measured Working Temperature: -10℃ to +75℃) (Please pay attention to the temperature of the power tube in actual use, please strengthen heat dissipation or use derating if the temperature is too high) Potentiometer Adjustment Direction: CW (increase), CCW (decrease) Output Short Circuit Protection: Yes (instantaneous protection) constant current (current setting constant current value can not be short-circuited for a long time) Input Reverse Protection: None, Output Anti-reflow: None, for the load self-charged or inductive load needs to add a 2-pole tube! Wiring Mode: Terminal block Output Current Adjustment Method: 1. Adjust the CV potentiometer and set the output voltage to the voltage value you need according to your load requirements. 2. Set the CC potentiometer for about 30 turns in CCW (that is, set the output current to the minimum), connect the LED, and adjust the CC potentiometer to the current you need. For battery charging, after the battery is discharged, connect to the output and adjust CC to the current you need. (When charging, you must use the discharged battery to adjust, because the battery has more power. More, the smaller the charging current.) Wiring Instructions: OUT+: Output positive OUT-: Output negative +IN: Input positive -IN: Enter a negative number CV: Output voltage regulation CC: Output current adjustment EN: Enable, turn off output at low level; pause, valid at high voltage level When the input and output are grounded, CV outputs constant voltage without load, and CC outputs constant current Package List 1 x Power Supply Module