Question: On the BQ78350-R1 part, are the 5 LED output pins on the part are push-pull outputs or open drain outputs?
An observation: In the part's datasheet, I see that the sink current for the LED pins is around 2 or 3 mA.
Then, I was looking at the LED (LTST-C190GKT) used in the BQ76920 EVM user guide schematic. Here is a link to the datasheet for the LED:
It looks like the bias current for the LED is supposed to be 10 mA.
I am thinking about using the 5 LED output pins to drive the gate of a BSS138LT3G NFET, with a 270 ohm resistor, then LED to 3.3V above the NFET's drain. Would that work?