Can i just attach 3 separate PWM channels to control each colour?
There are a few ways to do this, and your actual intended application can change what you do.I drive those exact LEDs with the CAT4109 driver from ON Semi. The catch? They're in a SOIC-16 package, so unless you are up for surface mount soldering, you're not going to be happy. It also only drives them at 175mA - that's fine by me, as they're still VERY bright, but you can parallel the outputs to get 350mA.How about a few TLC5940s with paralleled outputs? (sinks, really): http://focus.ti.com/lit/an/slva253/slva253.pdfJust want to use parts available at your local radio shack? It gets much tougher, as we're dealing with a common anode led with some pretty serious current requirements. If you have an application in mind, do share and it will help.
Please enter a valid email to subscribe
We need to confirm your email address.
To complete the subscription, please click the link in the
email we just sent you.
Thank you for subscribing!
via Egeo 16