I've decided on using WS2803 PWM constant current LED drivers. I'd like to cascade two of them and use the first one for 15mA output and the second one for 20mA output (each chip for driving different LEDs).
The output current is based on a resistor connected to each chip. So I thought this shouldn't be a problem, until I read this in the datasheet:
"In LED display and decorative applications, WS2803 provides nearly no variations in current from channel to channel and from IC to IC."
Does this mean I can't cascade two chips with differently set output current? Or is it just my misunderstanding, based on my fuc*ing poor english?
Also, the datasheet mentions resistors for impedance match, when cascading (up to 6 meters far). Do I care about those, when the ICs are just few centimeters far?
Thank you everyone!