Constant voltage constant current adjustable automatic buck-boost power module buck boost module solar charging

Product parameters:

Input voltage : 5-30V  

Output voltage : 0.5-30V  

Output current : can work stably at 3A for a  long time , and can reach 4A under enhanced heat dissipation

Output power : natural heat dissipation 35W, enhanced heat dissipation 60W

Conversion efficiency : about 88%

Short circuit protection : Yes

Working frequency : 180KHZ

Size : length * width * height 65 * 32 * 21mm 

Weight : 30g

Instructions:

1. Use as a common buck-boost module with overcurrent protection

Instructions:

( 1 ) Adjust the CV constant voltage device to make the output voltage reach the voltage you want.

( 2 ) with a multimeter 10A current file measurement output short circuit current (two lead directly to the output node can) , while adjusting CC constant potentiometeroutput current reaches a predetermined overcurrent value.(For example , if the current value displayed by the multimeter is 2A , then the maximum current can only be 2Awhen you use the module, and the red constant voltage constant current indicator will be on when the current reaches 2A , 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:

( 1 ) Determine the float voltage and charge current you need to charge the battery; (if the lithium battery parameter is 3.7V/2200mAh, then the float voltage is 4.2V, the maximum charge current is 1C , ie 2200mA ) 
( 2 ) Under no-load conditions The multimeter measures the output voltage, adjusts the constant voltage position device to make the output voltage reach the float voltage; (If charging the 3.7V lithium battery, adjust the output voltage to 4.2V ) 
( 3 ) Measure the output short-circuit current with the multimeter 10A current file. (directly to the two can lead to the output terminal) , while adjusting the constant current potentiometer output current reaches a predetermined charge current value; 
( 4 ) transfer the charge lamp current factory default is0.1 times the charging current; ( charging process The current is gradually reduced, gradually changing from constant current charging to constant voltage charging. If the charging current is set to 1A , when the charging current is less than 0.1A , the blue light is off and the green light is on. Charging completed ) 
( 5) Connect the battery and 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

( 1 ) Determine the operating current and maximum operating voltage at which you need to drive the LED ;

( 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 ) 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;

( 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 for more than 3A , 35W , please strengthen the heat! ! !

Precautions:

1. Module input IN-disabled and output OUT- shorted , otherwise the constant current function will be invalid.

2. Please ensure that the power of the power supply is greater thanthe power required by the output load!

3. Module input has no input anti-reverse function , please pay attention to the positive and negative direction of the power supply.

4. If the module wants full load output, the input voltage should be 8V or more. When the input voltage is 5V, the output power is about 15W. The module current value is up to 4A, subject to the maximum output power , such as output 17V, the current should be no more than 2A.

5. The module has output short-circuit protection . After short-circuit protection, the module automatically turns off the output, and the module can be restored after power-on. If your power supply has no output current-limit protection, it is recommended to connect the fuses in the front end of the module to improve the safety factor.

6. The module has input undervoltage protection function. The default is about 4.2V. After this value is lower, the output will be automatically disconnected and the module can be restored after power-on (note that the voltage at the module port is larger when the input current is larger. Do not ignore the partial pressure on the input lead).

7. The module contains three indicator lights , constant voltage constant current status indication (red, bright in constant current mode), charging indication (blue), full indication (green, the size of the rotating current is 1/10 of the set current) .