The module has IN/OUT, ON/OFF two buttons. IN/OUT button switches input voltage and output voltage display, long press can switch output current output power display and ON/OFF button control output is ON or OFF, long press can Set the default output state of the next power-on to be ON or OFF.

 

CC is the current setting potentiometer, clockwise rotation, can increase the set current, when the load current reaches the set current, enter the constant current state, the CC constant current indicator (red) lights up and the right CV is the voltage setting. The potentiometer rotates clockwise to increase the output voltage. The ON indicator is an output status indicator that lights up when there is voltage at the output, otherwise it is off.

Overview:

• Voltmeter Ammeter Adjustable
• With Digital Display
• Input voltage: 5.5 -30V
• Output voltage: 0.5-30V
• Output power: natural heat dissipation 35W, enhanced heat dissipation 50W
• Output current: can work stably at 3A for long time , and can reach 4A under enhanced heat dissipation
• Voltage display resolution: 0.05V
• Current display resolution: 0.005A

Features:

• Liquid crystal can display input and output voltage, output current output power
• The input end is anti-reverse protection, and the reverse connection will not burn
• It can be boosted, can be stepped down, the output voltage is 0.5-30V and the current limit is 0-4A
• The output end is anti-backflow, and there is no need to add an anti-backflow diode when charging the battery
• Press the button to control the output ON/OFF state, and you can set the power-on default to ON or OFF
• Using the buck-boost chip as the main controller, the external 60V 75A MOS tube is used as the switch tube, and the double 60V 5A SS56 Schottky is used for rectification, with sufficient voltage resistance and sufficient power, which is superior to the XL6009/LM2577 immature solution on the market
• The output ripple is small and there is LC filtering

Specifications:

• Input voltage: 5.5 -30V (when the input voltage is 5V, the buck-boost can also be realized, but the voltage and current measurement is not accurate; below 4.7V, under-voltage protection ) 
• 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 50W
• Voltage display resolution: 0.05V
• Current display resolution: 0.005A
• Conversion efficiency: about 88%
• Input reverse connection protection: Yes
• Output end anti-backflow: Yes
• Short circuit protection: Yes
• Working frequency: 180KHZ
• Size: length * width * height 66 * 48 * 21mm 
• Mounting hole: diameter 4mm
• Weight: 46 g

Instructions:

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

• Adjust the CV constant voltage device so that the output voltage reaches the voltage you want.
• 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 CC 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 2A, then the maximum current can only be 2A when 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, there will be a voltage drop of 0~0.2V after the load is connected, and there will be a certain voltage drop on the input and output wires when the current is high. This is normal.

 

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.