Other Parts Discussed in Thread: PMP9175, , PMP20220, TPS23751
Hello,
I have a need for a POE PD design that will power a remote sensor. This sensor could frequently operate in environments around 85C, and even be subjected to excursions of 110C or so.
Power requirements are 5V with typical current being 100mA and short term maximums of 1A (50-100mS at these levels, infrequently).
I've found PMP9175 to be a good starting point for the design. Would you agree? I plan to replace the majority of external components with 125+C rated equivalents.
Does PMP9175 and TPS23753 make the most sense for a high temperature design? The ultimate goal is to be able to function at the highest temperatures possible, so if another PD controller makes more sense, I'm very open to suggestions. PMP9175 was selected as a starting point purely because the voltage/current output suited our requirements. This application is such that sacrificing life-span of the device is acceptable in order to function at extreme temperatures. Our end users would be truly delighted if we could function at 125C ambient, and would happily accept <1000 hour lifespans as a tradeoff.
Thank You,
Ben