I have a simple collection of 8 common cathode LEDs with internal limiting resistors. Each LED draws 20mA when connector to the 12VDC supply. I am looking for a driver that can interface between my 5VDC LVDS outputs from a Zync7020 FPGA and the 12VDC high side LEDs.
The TLC59213 appears to have all that I need except for the current capacity at 100% duty cycle. If I am reading the datasheet (Figure 1) correctly it appears that at 100% D.C. I am limited to a total of about 30 mA. I am assuming that is the sum total of all 8 outputs and not 30 mA per output.
If I time slice the outputs in order to reduce the simultaneous outputs (e.g N=1) I will significantly reduce the LED brightness, as these LEDs have internal limiting resistors and are designed for 100% D.C.
Finally my question:
What is the simplest driver to uses to control these LED?
This is a low volume application so I am not price sensitive. I am more concerned with reliability and simplicity of the circuit.