I recently did a project where I used some ULN200A darlington drivers to control LED stripes.
This worked well. I now made some changes to the projects and the LED stripes got a little longer. That leads to the Problem that I'm now slightly over 500mA.
So I'm looking for an alternative that if possible would fit where the ULN2003A was.
Any ideas?
I read in the data sheet of the LED stripe which currently run @ 24VDC that they support up to 25VDC. If I change that to 25, would it bring down the mA?
It sounds like you need the ability to expand that to higher current. It's not as simple but a current limiter that can provide high current might be what you need.
You can build 8 of these circuits on a copper clad protoboard.
If you go through to step 9 you'll find the one using a high power mosfet with PWM / DC input.
You should make and attach some heat sinks to the mosfets, they're easy to make. Then put it all in a box.
The mosfet is a logic level input device so it can also work as a switch for silly levels of current. With a proper heatsink it can handle huge amounts of current, up to 54amps.
