5A DC-DC adjustable step-down module with a voltmeter
One: Product Description
This product is a 180 KHz fixed frequency PWM buck (step-down)
DC/DC module,capable of driving a 5A load with high efficiency, low
ripple and excellent line and load regulation.The module with a
voltage meter to display the input voltage and output voltage, and
the voltage can be corrected through the button to improve the
accuracy of the voltmeter.
Features:
1. LED power indicator.
2. 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 states are able to be memorized, is not lost even if the
power is disconnected. (On-board marked "IN" LED is turned on, the
nixie tube display input voltage value, "OUT" LED bright display is
the output voltage value).
3. Special launch, the voltmeter calibration function, will never
exist voltmeter inaccurate!
Voltmeter calibration method:
(1) Output voltage calibration steps
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.
(2) 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.
Two: Performance parameters
1.Input voltage range:4~38VDC(Note:input voltage not exceeding
38V)
2.Output voltage range:1.25-36VDC adjustable
3.Output current: 0-5A
4.Output power: 75W
5.voltmeter range: 4 to 40V, error ±0.1V
6.Operating frequency: 180KHz
7.High efficiency up to 96%
8.Built in thermal shutdown function
9.Built in current limit function
10.Built in output short protection function
11.Input reverse polarity protection: None (if required, high
current diode in series with the input).
12.L x W x H =6.6*3.9*1.8CM
Three: application
The DC/DC buck module applications the input voltage is higher than
the output voltage of the buck field, such as battery, power
transformer, DIY adjustable regulated power supply, LCD Monitor and
LCD TV,portable instrument power supply,telecom/networking
equipment,24V vehicle notebook power supply,industrial equipment
buck.12V buck to 3.3V, 12V buck to 5V, 24V buck to 5V,24V
buck to 12V, 36V buck to 24V etc.
