DC 4.0~40 to 1.3-37V LED Voltmeter Buck Step-down Power Converter Module LM2596

Description:

-Input voltage range: 4-40 v (40 v to limit the highest voltage).
-Output voltage range:1.25V – 37V (decompression mode, input output must be greater than 2 V above).
-Output current: 2 A continuous output.
-Output power: the maximum 15 w.
-Ripple frequency: 150 KHZ.
-Grain wave peak: 100 mv.
-Voltmeter precision: ± 5 ‰ .
-Static power: 20 ma (and input voltage output voltage and digital tube color is closely related to the actual current will exist deviation).

-With voltage display function, the displayed accuracy is ± 0.05V, range is 0 – 40V.( Note: in order to voltage display more accurate, please ensure that the input voltage is higher than 4V) .
-Button to switch measurement of the input or output voltage，and LED indicates the current measurement of the input or output voltage;The nixie tube can be turned off by another button. Mentioned in these states are able to be memorized, is not lost even if the power is disconnected.
-Continuously adjustable output voltage range of 1.25V -37V, 4-40V input voltage range.（The input voltage is at least high than the output voltage of 1.5V）.
-High efficiency,150 kHz fixed frequency internal oscillator.
-Guaranteed 3A output load current.
-Thermal shutdown and current limit protection.
-IN + : input positive/IN – : input negative.
-OUT + : output positive/OUT – : output negative.

• How to calibrate:

• Step 1, adjust the right button so that “OUT” LED lighted, the voltmeter shows the value of output voltage; Press the right button for more than 2 seconds, release, voltmeter and “OUT” LED flashes in synchronization so that you enter the output voltage calibration mode.
• Step 2,press the right button (normal speed), the voltage value is adding up a unit; Press the left button, minus a unit; Due to a unit is less than 0.1V, the minimum voltage display to 0.1V, so you need to continuously press 1-5 times to see the voltmeter change 0.1V, how many times voltmeter change 0.1V by pressing the key, depending on the current display voltage, the higher the voltage, the fewer the number of press.
• Step 3,press the right button for more than 2 seconds, release, to exit the output voltage calibration mode. All parameters set to automatically power down to save.
  Input voltage calibration steps
• Step 1, adjust the right button so that “IN” LED lighted, the voltmeter shows the value of input voltage; press the right button for more than 2 seconds, release, voltmeter and “IN” LED flashes in synchronization so that you enter the input voltage calibration mode.
• Steps 2 and 3, consistent with the output voltage calibration method.
  Note
• Some customers report: “The module can not be adjusted, the output voltage is always equal to the input voltage.” When you encounter this problem, please counterclockwise rotation of the potentiometer 10 laps or more, then you can adjust the output voltage. Because the factory default output voltage is 20V.