these being high power leds it seems wise to include thermal derating circuitry
the tps92691 suggests using a voltage divider with a NTC thermistor from its on voltage regulator e.g
The LEDs however are either 4 or 7 LEDs in one die so using multiple PTC seems redundant and complicates track layout near the LEDs . I am therefore looking for the best way to connect multiple drivers to a single NTC thermistor.
The simplest circuit would be
but that makes assumptions about the TPS92691's 7.5V LDO Regulator and that they wont "fight" with each other.
and external regulator is possible but is that really necessary?
is this a sensible way of doing this or is there a better way?