LED Voltage and current display LM2596 DC-DC Step Down CC-CV Adjust Power Supply

Features:

The 0.36-inch voltmeter ammeter LED digital tube, voltmeter resolution 0.1 V, ammeter

resolution 0.01 A, with blue and green LED digital tube Non-isolated step-down constant current, constant voltage module (CC CV) charging module

Input voltage: 7-26V Output voltage: continuously adjustable (1.25-25V) Minimum Voltage difference: 2V Output current: rated 2.6A, the largest 2.6A (more than 15W, please install the heat sink) Constant current range :0-2.6A (adjustable) Size: ultra-small size 49 (W) * 70 (L) * 17 (H) mm (without potentiometer) Output power: natural cooling 15W, 25W with heatsink Conversion efficiency: up to 92% (output voltage higher, higher the efficiency) Output ripple: 20M bandwidth (for reference only)

Operating temperature: Industrial grade (-40 ℃ to +85 ℃) (ambient temperature exceeds 40 degrees, lower power use, or add one heatsink) Full load temperature rise: 45 °C No-load Current: Typical 10mA (12V switch to 4.2V) Load regulation: ± 1% Voltage regulation: ± 0.5% Dynamic response speed: 5% 200uS Potentiometer adjustment direction: clockwise (increase), counterclockwise (decrease) Indicator:Yellow LED constant current, red LED work,fully charged of green LED Output short circuit protection: Yes, constant current (constant current value of the current settings) Input reverse polarity protection: No, please comply with our plate or in the input reverse polarity

protection diode in series. Other please refer to the manual

Chip pin soldering and PCB contacts to strengthen handling.Current is

more stable and strong.

Ball solder joints, not to hurt the hand.

Adjustable precision, according to your request to set the display

value.

special customized the 4W sampling resistor. Heat is smaller. Display

more accurate.

5.0 terminals.Easier to connect the wires.

Overall more slim.Coupled with the highlighted blue and emerald green

LED is more beautiful.

Module parts Description.

********** MODULE TEST **********

We test the module to limit the voltage of the cc-cv. Limit the current. The accuracy of the current. New creativity superimposed on the parallel output test. The following picture introduced the test cases.

First, to test a single module.Test the illustrations.

1. Connected to the wire, turn it on. Adjust the limit the output voltage at 8V.

Adjust the limit current 1A.

Connected load, adjust the load, the output current of 0.75A.

Continue to adjust the load, so that the output current of 1A. Display output 8V 1A.

If we continue to adjust the load will happen? YES! The constant current work. In order to limit the current automatic voltage down.

The second step. Test two modules are superimposed on the parallel input and output.

We still set the voltage is 8V. The limit current adjustment to the maximum 2.60A . When the set current limit. Two modules output to be separated. Note! The following test is an instant test. Long-running large current must be added to the heat sink.

Connected to the load, adjust the load.The total output current of 0.69A, see the module on the ammeter, each is 0.35A.(0.35 +0.35 = 0.70A)

Continue to adjust the load.The total output current of 1.99A, see the module on the ammeter, each is 1.00A and 0.99A. (1 +0.99 = 1.99A)

Continue to adjust the load.The total output current of 4.63A, see the module on the ammeter, each is 2.33A and 2.29A. (2.33 +2.29= 4.61A). At this time, the input voltage is 16V, 2.5A. Conversion efficiency: 92.6% .

The third step.Output tied with four modules.

Connected to the wire, all the positive terminal of the module input together.All negative together.Turn on the power.All set the voltage to 8.0V.

Set the current limit to the maximum 2.60A. Setting, the output of each module must be separate. Note! The following test is an instant test. Long-running large current must be added to the heat sink.

Connected to the load, adjust the load.The total output current of 0.80A, see the module on the ammeter, each is 0.20A.(0.20 * 4 = 0.80A)

Continue to adjust the load.The total output current of 4.02A, see the module on the ammeter, each is 1.00A ,1.00A,1.00Aand 1.02A. (1.00 * 3 + 1.02 = 4.02A)

Continue to adjust the load.The total output current of 8.76A, see the module on the ammeter, each is 2.17A, 2.17A, 2.19A and 2.23A. (2.17 +2.17+2.19+2.23= 8.76A). At this time, the input voltage is 16V, 5.4A. Conversion efficiency: 81.1%

The above tests can be seen. Output current = N modules the sum of the

current. Or Output current / N = output current of the single module.

If multiple module feel that trouble adjust the voltage and current. You can share an external potentiometer. pay attention to the wiring to be correct. After sharing the potentiometer. Adjust voltage potentiometer. Voltage of all the modules will also be synchronized changed. Adjustment to limit the current potentiometer. Limit the current will also synchronize changes. (Do not recommend no electronic-based enthusiasts to change the circuit. Must be welded to complete. And then connected the power supply. Module changes do not give in return or free warranty.)

The above is a personal hobby of the actual test. not necessarily all modules can be so arranged in the merged output. Because the resistance error. Makes voltage and current shows some deviation. Is normal.