5A Constant Voltage and Constant Current Step-Down Power Supply Module with USB Port (Power Bank Converter Board)

1、Practical Use: Can also work as voltmeter, ammeter and power meter, an excellent replacement for multimeter with clear view and easy operation.

2、USB Interface: The on board USB interface can easily charge your digital products. And the USB output voltage is the same as the module output voltage, not a fixed 5V output, please confirm before charging the USB device.

3、Functionality: Can be used as an ordinary buck module with over current protection, a charger for various batteries, and a high power LED constant current drive module.

4、2 Work Modes: There are 2 modes, constant voltage and constant current, and an indicator light indicates which mode the module is currently in.

5、Easy Setting: When used as a lithium battery charger, you can set the float voltage and charging current, and there is an indicator light to indicate whether it is charging or fully charged. 6、Safe Working: With current limiting protection function, the module will not be burnt out even if the output is short circuited. 7、High Accuracy: The on board voltmeter and ammeter can be self calibrated, and there will never be inaccurate problems.Item Type: Power Supply Buck Module

Input Voltage: 5-36V

Output Voltage: 1.25-32V continuously adjustable.

Output Current: Adjustable, maximum 5A (recommended to use within 4.5A).

Output Power: Maximum 75W (recommended to use within 50W, please reduce the power when under large voltage difference).

Working Temperature: -40-+85 degrees

Working Frequency: 180KHz

Conversion Efficiency: up to 96%.

Short Circuit Protection: Yes

Over Temperature Protection: Yes (automatically shut down the output when over temperature).

Input Reverse Connection Protection: None (if necessary, please insert a high current diode in series with the input).

Installation Method: 4 x 3mm / 0.1in (approx.) screws.

Wiring Mode: Wiring terminal or welding terminal, V IN is input, V OUT is output.

Length: Approx. 68.2mm / 2.7in

Width: Approx. 38.8mm / 1.5in

Height: Approx. 15mm / 0.6in

How to Use:

1. Use method as an ordinary buck module with over current protection capability:

A. Press the button on the right to adjust the digital meter to the display output voltage interface, and adjust the "constant voltage potentiometer" to make the output voltage get to the voltage value you want;

B. Adjust the digital meter to the display output current interface, and directly short circuit the output terminal of the module (just find a thick wire to short circuit the output terminal), at this time adjust the "constant current potentiometer" to make the current value reaches the preset overcurrent protection value; (for example, the current value displayed by the on board ammeter is 4A, then the maximum current of the module is limited to 4A, and the red indicator light is on when the current reaches 4A)

C. Connect the load and work.

2. Use as a battery charger:

The module without constant current function cannot be used to charge the battery. Because the voltage difference between the exhausted battery and the charger is very large, the charging current is too large and will cause damage to battery. Therefore, constant current must be used to charge the battery at the beginning. When the charging reaches a certain level, it will automatically switch back to constant voltage charging.

A. Determine the floating voltage and charging current of the battery; (if the lithium battery parameter is 3.7V/2200mAh, then the floating voltage is 4.2V, and the maximum charging current is 1C, which is 2200mA)

B. Under no load conditions, adjust the digital meter of the module to the display output voltage interface, and adjust the "constant voltage potentiometer" to make the output voltage get to the float voltage;

C. Adjust the digital meter to the display output current interface, and directly short circuit the output terminal of the module (just find a thick wire to short circuit the output terminal), at this time adjust the "constant current potentiometer" to make the The current value reaches the preset charging current value;

D. The default charging current is 0.1 times the charging current; (The current of the battery is gradually reduced during the charging process, and gradually changes 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, the blue light is off and the green light is on, and the battery is fully charged at this time);

e. Connect the battery and charge it.

(In step 1, 2, 3, 4, the input terminal is connected to the power supply, and the output terminal is not connected to the battery without load).

3. Use as LED constant current drive module:

A. Determine the operating current and maximum operating voltage you need to drive the LED;

B. Under no load conditions, adjust the digital meter to the display output voltage interface, and adjust the "constant voltage potentiometer" to make the output voltage get to the LED operating voltage;

C. Adjust the digital meter to the display output current interface, and directly short circuit the output terminal of the module (just find a thick wire to short circuit the output terminal), at this time adjust the "constant current potentiometer" to make the The current value reaches the preset LED working current;

D. Connect the LED and test the machine.

(In step 1, 2, and 3, the input is connected to the power supply, and the output is no load without the LED light)1 x Power Supply Buck Module

4 x Screw ans Nut Set

1 x Heat Sink