5A Lithium Charger Board XL4015 Adjustable Step Down Module

Input voltage: 4-38V

Output voltage: 1.25-36V continuously adjustable

Output current: adjustable, up to 5A

Output power: up to 75W

Working temperature: -40~+85 degrees

Working frequency: 180KHz

Conversion efficiency: up to 96%

Short circuit protection: Yes (limited current 8A)

Over temperature protection: Yes (automatically turn off the output after over temperature)

Input reverse connection protection: None, (If necessary, please input a large current diode in the input string)

Installation method: 4 3mm silk

Wiring method: terminal block or soldering terminal, V-IN is input, V-OUT is output

Module size: length 61.7mm width 26.2mm height 15mm

Weight: 25g

Second, the scope of application

1. Use as a normal buck module with overcurrent protection

Instructions:

(1) Adjust the constant voltage positioner so that the output voltage reaches the voltage you want.

(2) Use the multimeter 10A current file to measure the output short-circuit current (directly connect the two test leads to the output terminal), and adjust the constant current potentiometer to make the output current reach the predetermined overcurrent protection value. (For example, if the current value displayed by the multimeter is 4A, then the maximum current can only reach 4A when you use the module, and the red constant voltage constant current indicator will be on when the current reaches 4A, otherwise the indicator will be off)

Note: When using in this state, since the output has a current sampling resistor of 0.05 ohms, there will be a voltage drop of 0~0.3V after the load is connected. This is normal! This voltage drop is not pulled down by your load, but falls to the sampling resistor.

2. Use as a battery charger

Modules without constant current function cannot be used to charge the battery. Because the voltage difference between the battery and the charger that consumes electricity is too large, the charging current is too large, causing damage to the battery. Therefore, the battery should be used at the beginning. Stream charging, when the charging reaches a certain level, it automatically switches back to constant voltage charging. Instructions:

(1) Determine the float voltage and charge current of the rechargeable battery you need; (If the lithium battery parameter is 3.7V/2200mAh, then the float voltage is 4.2V and the maximum charge current is 1C, ie 2200mA) (2) Under no-load conditions, the multimeter measures the output voltage, and adjusts the constant voltage positioner to make the output voltage reach the float voltage; (If charging the 3.7V lithium battery, adjust the output voltage to 4.2V)

(3) Use the multimeter 10A current file to measure the output short-circuit current (directly connect the two test leads to the output terminal), and adjust the constant current potentiometer to make the output current reach the predetermined charging current value;

(4) The charging lamp current defaults to 0.1 times the charging current; (the battery is gradually reduced during the charging process, gradually changing from constant current charging to constant voltage charging, if the charging current is set to 1A, then when When the charging current is less than 0.1A, the blue light is off, the green light is on, and the battery is charged. (5) Connect the battery and charge it.

(Steps 1, 2, 3, and 4 are: input terminal is connected to the power supply, and the output terminal is not connected to the battery.) 3. As a high power LED constant current drive module (1) Determine the operating current and maximum operating voltage at which you need to drive the LEDs; (2) Under no-load conditions, the multimeter measures the output voltage, and adjusts the constant voltage positioner to make the output voltage reach the maximum working voltage of the LED;

(3) Measure the output short-circuit current with the multimeter 10A current file, and adjust the constant current potentiometer to make the output current reach the predetermined LED operating current; (4) Connect the LED and test the machine. (Steps 1, 2, and 3 are: input is connected to the power supply, and the output is not connected to the LED.) Note: When using this module over 3A, 35W, please strengthen the heat! ! !