DC 300W 20A Adjustable Step Down Converter Voltage Buck DC CV Constant Current Features: Synchronous Rectification Technology Introduction Synchronous rectification is a new technology that uses dedicated power MOSFETs with very low on-state resistance Instead of rectifier diodes,synchronous rectification is a new technology that reduces rectification losses It can greatly improve the efficiency of DC/DC converters and does not have the dead band voltage caused by the Schottky barrier voltage Power MOSFETs are voltage-controlled devices,which have a linear volt-ampere characteristic during conduction When using power MOSFETs as rectifiers Requires the gate voltage must be synchronized with the phase of the rectified voltage to complete the rectification function Therefore,it is called synchronous rectification Synchronous rectification technology is to greatly reduce the rectification losses at the output of the switching power supply Thus improving the conversion efficiency and reducing the heat of the power supply itself Specification: Module nature:synchronous rectifier non-isolated step-down constant current and constant voltage module CC CV charging module Scope of application High power LED constant current driver,lithium battery charging(including ferroelectric),4V,6V,12V,14V,24V battery charging Ni-Cd-Ni-MH battery(battery pack)charging,solar panels,wind turbines Input voltage:DC6-40V Output voltage:continuously adjustable(1.2-35VDC)for a long time below 32V For applications where the input voltage is higher than the output voltage can not be raised Output current:maximum 20A for a long time within 15A Power tube temperature exceeds 65 degrees,please add a fan to dissipate heat,high voltage output please reduce the amount of use Adjustable resistance:100K Current limit range:0.2-20A(adjustment)module more than 65 degrees,please add a fan Minimum voltage difference:3V Operating frequency:150KHZ Conversion efficiency:up to about 96%,efficiency and differential pressure and the use of environmental related Output ripple: ripple about 50mV(excluding noise)20M bandwidth(for reference only)input 24V measurement Operating temperature:-10℃ to+75℃ In actual use,please pay attention to the temperature of the power tube If the temperature is too high,please strengthen the heat dissipation or reduce the amount of use Potentiometer adjustment direction:clockwise(increase),counterclockwise(decrease) Output short-circuit protection:with (instantaneous protection)constant current Current set constant current value can not be short-circuited for a long time Input anti-reverse connection protection:no Output anti-reverse current:no,for load self-charging or inductive load requires 2 additional diodes Wiring method:terminal block Module size:60*53*30MM Net weight:about 85G Output current adjustment method 1.Adjust the CV potentiometer and set the output voltage to the value you need according to your load requirements 2.Set the CC potentiometer counterclockwise for about 30 turns(i.e.output current is set to the minimum value) 3.Connect the LED and adjust the CC potentiometer to the current you need For battery charging,discharge the battery,then connect to the output and adjust the CC to your desired current Note:For charging,you must discharge the battery to adjust it accurately Because the more power remaining in the battery,the smaller the charging current Wiring instructions OUT+:output positive OUT-:output negative +IN:Input positive -IN:Input negative CV:output voltage adjustment CC:Output current regulation EN:Enable,low level to turn off the output,pause,high voltage level to activate When both input and output are grounded CV outputs constant voltage and CC outputs constant current at no load Package includes: 1PCS*300W 20A Adjustable buck module Note: Only includes the above package products Specifications are manually tested,for reference only Please refer to the actual product,thank you