Step Down XL4015 High current 5A 4-38V to 1.25-36V โมดูลแปลงไฟจาก 4-38V เป็น 1.25-36V กระแส 5A
Manufacturer high current 5A constant voltage constant current step-down power supply module LED drive lithium battery charging
When using this product, the input ground and output ground of the module should not be together, which will cause the current sampling resistor on the back of the board to be bypassed, so that the module can not adjust the output current, it is easy to connect the load. Burn the power chip on the module .
This module is easy to use and powerfull A module with 3 functions to meet most of your occasions! ! !
Module highlights
1. High power, high efficiency, 5A , low ripple
2. Three in one
- Used as a normal buck module with overcurrent protection capability
- Used as a charger for various voltage values of lithium batteries, batteries, nickel-cadmium nickel-hydrogen batteries (battery packs), for solar panels, wind turbines, etc.
- used as a high power LED constant current drive module
3. There are two modes of constant voltage and constant current, and there are indicators to indicate which mode the module is currently in
4. When used as a lithium battery charger, you can set the float voltage and charge current. Is it charging or already full
5. With current limiting protection, the module will not burn out even if the output is short circuited.
- One, one, module parameters
- 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: . 4 Ke 3mm screws
- 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: 25 g
The scope of application
1. Use as a normal buck module with overcurrent protection
- Adjust the constant voltage positioner so that the output voltage reaches the voltage you want.
- with a multimeter 10A current file measurement output short circuit current (two lead directly to the output node can) , while adjusting the constant current potentiometer output current reaches a predetermined overcurrent value. (For example , if the current value displayed by the multimeter is 4A , then the maximum current can only be 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 there is a current sampling resistor of 0.05 ohm at the output end , 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 down 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, automatically switch back to constant voltage charging when charging to a certain extent.
Instructions:
- 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 )
- 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 )
- with a multimeter 10A current file measurement output short circuit current (two lead directly to the output node can) , while adjusting the constant current potentiometer output current reaches a predetermined charge current value;
- The charging and turning lamp current defaults to 0.1 times of charging current; (The current 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 the charging current is less than 0.1A when the blue lamp, the green lamp is lit, then the battery is fully charged )
- connected to the battery charge.
(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
- Determine the operating current and maximum operating voltage at which you need to drive the LED ;
- 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 ;
- Measuring the output short-circuit current with the multimeter 10A current file, and adjusting the constant current potentiometer to make the output current reach the predetermined LED operating current;
- 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 for more than 3A , 35W , please strengthen the heat! ! !