Regarding the Bistro thermal management: I just got a FET+1 driver from MTN with bistro flashed by Richard. I’m using it in a S2+ with single XPL emitter. I was trying to test the thermal management by monitoring the light output. With a cooling fan and light in medium mode (about 2.2A, one mode down from 100% in the 5 mode group) the outside temp stabilized around 111F. I then turned the fan off and the temp quickly went up and the driver stepped down when the outside got to around 123F. The driver stepped down to roughly 60% every 12 or so seconds, so it got down pretty quickly. It stepped down 3 or 4 times then stayed at that level. I then turned the fan back on and the flashlight cooled pretty quickly to 91F. I waited for several minutes, but it never stepped the output back up.
Does this seem normal? It’s hard to know exactly what the temp of the MCU is, but it seems like it would have cooled enough to get below the temp setpoint.