400W 18A Step Down Module:
Features:
The module adopts a step rectification scheme, with extremely high efficiency, with a maximum efficiency of 96%
The output voltage and current are continuously adjustable
The maximum input voltage can reach 95V, and the maximum output voltage is 90V
Input anti reverse connection, positive and negative reverse connection without burning
There is a soft start switch
Parameters:
Module name: 500w step-down constant voltage constant current adjustable power module
Module nature: Non isolated step-down module
Input voltage: 12-95V
Output voltage range: 1.5-90V (can only reduce voltage, cannot increase voltage, output voltage can only be lower than input voltage)
Input output pressure difference: 2V
Output constant current: 0.3-18A (continuously adjustable)
Output rated current: 15A
Rated output power: 400w
Input overvoltage protection: None (overpressure prohibited)
Working temperature: -10~+65 degrees Celsius
Working frequency: 120KHz
Conversion efficiency: up to 96% (efficiency is related to input and output voltage, current, and voltage difference)
Short circuit protection: Yes (constant current protection)
Input reverse protection: Yes (MOS transistor reverse connection)
Output anti backflow: None (charging the battery, connecting the output to an inductive load, such as adding anti backflow diodes when connecting to the motor)
Precautions:
1. If the input voltage exceeds 36V, first turn the ON/OFF switch to OFF, connect the wire, and then turn the switch to ON (to prevent ignition during wiring)
2. This power supply is a step-down power supply, and the output voltage can only be lower than the input voltage
3. Under natural heat dissipation, the power should not exceed 400W and the current should not exceed 15A. There is a power limit. If the output voltage is high and the input output voltage difference is large, please reduce the current and use it
4. If the current exceeds 15A and the power exceeds 400W, please add a fan for heat dissipation
Voltage and current adjustment method: (using a tool multimeter and a flat screwdriver)
Voltage regulation: turn the blue Potentiometer on the power panel according to the voltage you need, and turn the voltage up clockwise and down counterclockwise;
Output current regulation: turn the multimeter or Ammeter to 20A or 10A current gear, adjust the power supply voltage to 5V, turn the constant current Potentiometer counterclockwise for about 10 turns, adjust the current to the minimum, use the multimeter for short circuit output, and then adjust the Potentiometer clockwise to adjust the current to the required current value;
The current detection of the module is a low-end detection. Please do not directly short circuit the input negative pole and output negative pole with wires, as the short circuit negative pole power supply may not have constant current, resulting in damage to the power supply and electrical equipment that requires constant current.
The module is a step-down power supply that can only reduce voltage but cannot increase it. The input voltage must be higher than the output voltage.