MemberAugust 4, 2020 at 12:48 pm
I have been trying to control a 12V RGB LED strip using a Controllino MAXI and its’ PWM outputs. My problem here is, that the LED strip has a common anode which forces me to use the digital Outputs as current sinks instead of current supplies. On the pin header this works just fine when I use a small single RGB LED that is rated for 5V. When I plug the common anode of the strip into the screw terminal digital Output and connect one of the color channels to ground it works as well. But when I try to use the digital output as a current sink as stated above (common Anode connects to +12V and the color channels connect to the digital outputs) nothing happens at all. I have used a multimeter to see if there is any kind of current flowing but there’s nothing.
Can the HighSide Switches only be used as a current supply?
Would it be possible to have a look at the datasheet of the HighSide Switch?
MemberAugust 5, 2020 at 11:06 am
at MAXI is digital power output implemented by High Side Switch, that means it cannot pull down the output. On CONTROLLINO MEGA are some digital outputs implemented by Half-Bridge configuration and there it is possible – see MEGA product description.
If you want to use MAXI, you have use some additional transistor to be able to pull it down.
MemberAugust 6, 2020 at 6:20 am
I see. Thank you for your quick answer!
MemberOctober 2, 2020 at 1:57 pm
Your welcome !
Enjoy the CONTROLLINO !
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