20A High-power synchronous rectifier continuously adjustable step-down constant voltage constant current power supply module charging LED drive 300W

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-time voltage caused by the Schottky barrier voltage. Power MOSFET is a voltage-controlled device, and its volt-ampere characteristics are linear when it is turned on. 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 greatly reduces the rectification loss at the output end of the switching power supply, thereby improving the conversion efficiency and reducing the heat of the power supply itself.

Parameter description:
Module nature: synchronous rectification, non-isolated step-down constant current and 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 batteries Charging, Ni-Cd Ni-MH


Battery (battery pack) charging, solar panel, wind turbine The application cannot be boosted) 

Output current: maximum 20A within 15A for a long time (please add a fan to dissipate heat if the temperature of the power tube exceeds 65 degrees, please derate for high voltage output) 
Current limit range: 0.2-20A (adjustment) If the module exceeds 65 degrees, please Add a fan. 
Minimum dropout voltage : 3V 
Operating frequency: 150KHZ
Conversion efficiency: up to about 96% Efficiency is related to dropout voltage and use environment : -10℃ to +75℃) (Please pay attention to the temperature of the power tube in actual use. If the temperature is too high, please strengthen the heat dissipation or use derating) 
Potentiometer adjustment direction: clockwise (increase), counterclockwise (decrease)  
Output short circuit protection: yes (Instantaneous protection)
Constant current (currently set constant current value cannot be short-circuited for a long time) 
Input reverse connection protection: no, 
output anti-reverse perfusion: no, for the load with its own electricity or inductive load, an external 2-pole tube is required! 
Wiring method: terminal block
Module size: 60*53*30MM 
Net weight: about 85 grams

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 counterclockwise for about 30 turns (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 fully discharged, connect it to the output, and adjust the CC to the current you need. more, the smaller the charging current.)
 
Wiring instructions:
OUT+: output positive
OUT-: output negative
+IN: input positive
-IN: input negative
CV: output voltage regulation
CC: output current regulation
EN: enable, low level closes the output ;Pause, high voltage level active
When input and output are grounded, no-load CV output constant voltage, CC output constant current