300W 20A DC-DC Buck Converter Step Down Module Constant Current LED Driver Power Step Down Voltage Module Electrolytic Capacitor
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 driver, lithium battery charging (including ferroelectric), 4V, 6V, 12V, 14V, 24V battery charging, NiCd-NiMH 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 boosted)
Output current: maximum 20A long time within 15A (power tube temperature exceeds 65 ℃ please add fan cooling, high voltage output please reduce the amount of use)
Current limit range: 0.2-20A (adjustment) If the module temperature exceeds 65 degrees Celsius please add a fan.
Minimum voltage difference: 3V
Operating frequency: 150KHZ
Conversion efficiency: up to about 96% efficiency with the differential pressure and the use of environmental related
Output ripple: ripple about 50mV (excluding noise) 20M bandwidth (for reference only) input 24V measured
(Operating temperature: -10℃ to +75℃) (Please pay attention to the temperature of the power tube in actual use, please strengthen the heat dissipation or reduce the amount of use if the temperature is too high)
Potentiometer adjustment direction: clockwise (increase), counterclockwise (decrease)
Output short-circuit protection: there is (instantaneous protection) constant current (the current setting constant current value can not be a long time short circuit)
input reverse connection protection: no, the
output anti-reverse current: no, for load self-charged or inductive load requires additional 2 diodes!
Wiring method: terminal block
Module size: 60*53*30MM
Net weight: about 85 grams
Output current adjustment method.
1, adjust the CV potentiometer, according to your load requirements, set the output voltage to the voltage value you need.
2, counterclockwise set CC potentiometer about 30 turns, (set the output current to the minimum), connected to the LED, adjust the CC potentiometer to your desired current. If it is used for battery charging, after the battery is discharged, then receive the output, adjust CC to your desired current, (when used for charging, be sure to use the discharged battery to adjust to be accurate, because the more power left 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: low level to turn off the output; pause, high voltage level is valid
When the input and output ground, no-load CV output constant voltage, CC output constant current
