I am trying to connect a 21" LED Display driver's input pins to my power board. There is a datasheet also but it doesn't have the input pin diagram. Therefore, I have got the below attached input pin diagram from the Chinese manufacturer.
The things that I have understood by looking at pinout and datasheet of LED Display driver's is that on/off control takes 5V and that brightness takes the PWM input.
The questions I have in mind is:
-
Which ground is for which voltage. Does both 12V have common ground and the ground for on/off is separate.
-
Will the system still work if I don't give the adj brightness (PWM input) input? I just quickly want to test it, so will the brightness default to a certain value or is it necessary to connect the adj.
-
Will the on/off take 5V momentarily like a switch or do I need to supply constant 5V to keep the display on.
Input pin specs:
Best Answer
There is only one ground, and it is for all the connections.
Possibly. It's not noted, in the datasheet, so you should assume it requires some form of input to work properly.
Unknown. It's not noted, so assume it requires an external 5V source.
I'm being vague because the answers to the questions you're asking are largely not in the documentation for the LED driver. It's possible the driver has internal pull-up/pull-downs that would make it operate without external controls inputs, when fed 12V, but it's not noted in the datasheet.
You should contact the manufacturer, and ask for a proper datasheet.