I'm designing a motor driver using the ADuM4136.
From the datasheet Table 9, I've noticed that there are some conditions under which the READY and /FAULT pins have "UNKNOWN" states.
Can you explain this a bit more? For instance, if power is not applied to VDD2, READY will be low, and /FAULT is UNKNOWN.
Will /FAULT maintain its last state? Will it randomly toggle between states?
Likewise, if /FAULT is asserted during normal operation (goes low), READY has an "UNKNOWN" state listed.
If I read back LOW on both /FAULT on and READY, how can I determine if I am undervoltage/overtemperature OR have a DESAT condition?
Apologies if I am not thinking about this correctly or if it is answered elsewhere.
Thanks in advance,
Looking back at this truth table, I can see how it is a little confusing. I'll see if I can come up with a different representation. There are some time dependent events that make the nFAULT pin…
You bring up a great point. We are looking into how to change the truth table to reflect the nFAULT and READY better.
And, yes, nFAULT will act the same whether VDD2 is present or not, once a…