20A High power synchronous rectification step-down constant voltage constant current power supply module charging LED driver 300W high power

Introduction to Synchronous Rectification Technology:

Synchronous rectification is a new technology that uses power MOSFETs with low on state resistance to replace rectifier diodes and reduce rectification losses. It can greatly improve the efficiency of DC/DC converters and there is no dead zone voltage caused by Schottky barrier voltage. Power MOSFETs belong to voltage controlled devices, and their volt ampere characteristics exhibit a linear relationship when conducting. When using power MOSFETs as rectifiers, it is required that the gate voltage be synchronized with the phase of the rectified voltage in order to complete the rectification function, hence it is called synchronous rectification. Synchronous rectification technology greatly reduces the rectification losses at the output of switching power supplies, thereby improving conversion efficiency and reducing the heat generated by the power supply itself.

Module parameters

Module nature: Synchronous rectification non isolated voltage reduction 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 hydrogen battery (battery pack) charging, solar panels, wind turbines

Input voltage: 6-40VDC

Output voltage: continuously adjustable (1.2-35VDC) for a long time below 32V (suitable for applications where the input voltage is higher than the output voltage and cannot be boosted)

Output current: 20A for a long time (if the temperature of the power tube exceeds 65 degrees, please add a fan for heat dissipation, and if the output voltage is high, please reduce the rating for use)

Current limiting range: 0.2-20A (adjustable)Please add a fan when the module exceeds 65 degrees.

Pressure difference: 3V

Working frequency: 150KHZ

Conversion efficiency: about 96% efficiency is related to pressure difference and usage environment

Output ripple:Ripple of around 50mV (noise)20M bandwidth (for reference)Measured at 24V input

Working temperature: -10 ℃ to+75 ℃) (Please pay attention to the temperature of the power tube during actual use. If the temperature is too high, please strengthen heat dissipation or reduce the rating for use)

Potentiometer adjustment direction: clockwise (increase), counterclockwise (decrease)

Output short circuit protection: with (instantaneous protection) constant current (currently set constant current value)Cannot short circuit for a long time）

Input reverse protection: None,

Output anti backflow: None, for loads with built-in electricity or inductive loads, an additional 2 tubes are required!

Wiring method: terminal block

Module size:60*53*30MM

Net weight: approximately 85 grams

Output current regulation method:

1. Adjust the CV potentiometer and set the output voltage to the desired value according to your load requirements.

2. Set the CC potentiometer counterclockwise for about 30 turns (i.e. set the output current to), connect the LED, and adjust the CC potentiometer to the desired current. Used for battery charging, after discharging the battery, connect it to the output and adjust the CC to the current you need. (When used for charging, be sure to adjust it with the discharged battery, because the more battery remaining, the smaller the charging current.)