How are the outputs controlled? It has a serial input but I don't understand how one can control the output(or maybe you can't?)?
It says that it can be used for high resolution LED panels
"for high serial data rates enabling responsive image rendition" ...
"The driving current of 5-80mA per LED channel is adjusted using one external resistor per color group of eight outputs, allowing the maximum brightness of red, green and blue channels to be optimized independently."
"Using this device to drive video displays and signage comprising large numbers of high-brightness LEDs saves bill-of-materials costs compared to conventional devices with fewer outputs. By allowing closer spacing of pixels and constituent LEDs, the driver also enables higher display resolution. Major applications will include full-color RGB video display panels for indoor or outdoor use, LED advertisement billboards, graphic boards, colored traffic signs, and variable message signs."
I can't for the life of me figure out how this chip works ;/ 5mA min current per driver??? Does that mean I can't drive an LED to ~0 brightness?(or even close)
No where do I see what the data format is for the input or what the input commands are or what they control. (this is the main problem as I have no idea how to use the thing. (I am either hoping to be able to turn a driver completely on or off using serial comm. or send bits to specifiy amount (255 = full on, 0 = full off or something similar)
It says that it can drive an LED matrix but how? If I can't control individual LED's then it will be impossible to control individual rows ;/
What I want to do is hook up a driver to the cathodes of 24 LED's and send info to the chip to program the currents. I'd ultimately like to have a matrix where I will cycle through the rows, each time programming the chip to give the appropriate currents for the LED's on that row.
I don't know if pages are missing from that datsheet or if I'm just being completely retarded but I can't find anything in it that makes any real sense on how to use it.