Other Parts Discussed in Thread: TPS25858-Q1,
Rather than buying the eval kit immediately, i need a couple of technical questions answered first.
from section of datasheet, 10.3.10 - Thermal Management With Temperature Sensing (TS) and OTSD feature -
• If operating with 3-A Type-C advertisement, the Px_CC1, Px_CC2 pin automatically reduces advertisement to
the 1.5-A level.
does the above mean, in the event of T1 event (temp warm) the TPS25855 will toggle 5v line and "enumerate/re-advertise" automatically? - is this what typical Smartphones respond to with a lower current draw? or do i need to toggle en/uv for a typical handset to see this effect?
If the overtemperature condition persists, causing VTS = 0.65 × VSENSE, the TPS2585x-Q1 performs below
actions:
• Broadcasts the default USB power mode, in default USB power, the charging is ideally reduced further per
the USB2.0 and USB3.0 specification.
• Buck regulator output voltage at the SENS pin is reduced to 4.77 V.
Again, does the above mean, in the event of T1 event (temp hot) the TPS25855 will toggle 5v line and "enumerate/re-advertise" automatically? - is this what typical Smartphones respond to with a lower current draw? or do i need to toggle en/uv for a typical handset to see this effect?
i would like to be able to "overide" the TS input and force these lower current modes, this looks to be possible through several analog means - i just need to understand the behaviour.
all the best,
B. Watson.