A part presentation from the Electronic City blog describes the SCT2024 16 channel LED driver with programmable current output and a serial control interface.
SCT2024 integrated circuit is a serial-parallel interface for LEDs with the programming and the limiting of the current on outputs in between 5 and 45mA. It makes an ideal option for commanding the displays with common anode with microcontroller. So the led driver is our discussion topic for today.
It looks like a simpler interface than the ubiquitous TLC5940. Fewer pins at least.
True, but you constantly have to feed it with data to get individually PWM-ed outputs. The TI-chip at least does that. Some Macroblock chips with integrated PWM are cheaper than the TI ones, but the interface is a bit nasty. It’s basically SPI, but some commands are encoded in the latch/clock timings, so you can’t use hardware SPI with fixed 8-bit writes. But again that doesn’t matter a bit if FPGAs are used. It only sucks for micros.