Other Parts Discussed in Thread: TPS65381A-Q1
Hello,
My customer has the following questions,
Our hardware engineers are wondering if it is possible to use only the analog part (power supply for the periphery eg: TMS570) and to not use the digital part (specially for the SPI interface between the TPS65381A-Q1 and TMS570, so as to not use the internal complex state machine)?
since according to the manual of the Safety Companion TPS65381A-Q1 (SLVSDJ1A) says that in the event of an over temperature condition, the VDD5 regulator should be activated and re-enabled via the SPI interface. The same is true with the VSOUT1 regulator, which is disabled by default and needs to be activated via the SPI interface.
Another aspect that bothers me a bit is the internal digital state machine of the companion chip. There are various transitions to various states that require an SPI connection in order to react to the watchdog timeout (DIAGNOSTIC -> ACTIVE or DIAGNOSTIC -> SAFE).
Can the TPS65381A-Q1 be used independently only for the analog part or power supply for the periphery? Or does an interaction with the digital part have to be considered?
Looking forward for a reply.
Thanks,
Needhu