300W 20A DC-DC Buck Converter Step Down Module Power Synchronous Rectification

Description

What is Synchronous Rectification:
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.
Features:
*6-40V wide voltage input
*97% high efficiency of synchronous rectification
* Constant voltage and constant current output continuously adjustable
*Two 85V 80A high current MOS transistors
*Use 23M sendust and 3 0.8MM pure copper wires to be wound in parallel.
Module Parameters:
Module nature: synchronous rectification non-isolated step-down constant current constant voltage module
Input voltage: 6V-40V DC
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: 0.3.-20A (adjustment) module over 65 degrees, please add a fan.
Minimum pressure difference: 3V
Working frequency: 150KHZ
Conversion efficiency: up to about 97% 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: clockwise (increase), counterclockwise (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 prevention: No, it is used to load self-charged or inductive load requires an external diode!
Wiring mode: terminal block
Module size: 60*53*30MM
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
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 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.)