I'm working on a project where I need 54 channels of PWM (min 8-bit resolution per channel, 10 or 12 preferred) controlling common-anode LED arrays at 1.5-3A per channel. The LED assemblies have built in current limiting resistors, so I don't need constant current outputs. All I really need is a device with plain logic-level PWM outputs that I can use to control a bank of FETs. Trouble is, any device I've found that has more than one or two PWM outputs has constant current outputs, and I'd need an extra inversion step before I could drive an N-channel FET, which I'd rather avoid.
Any suggestions for something that would work better for my needs?
Thanks
Any suggestions for something that would work better for my needs?
Thanks