Hi team,
My customer wish to use ISO1050 in their 48V system, but they have some concern about the bus fault protection as the CANH/CANL cable may short to the power supply. So, would you please help with questions below? thanks.
1) the voltage range of Vi or Vic (voltage at bus pins, separately or common mode) is -12V~12V : is this means that when the voltage on CANH and CANL is within -12V~12V range, ISO1050 should be working correctly?
2) the VCANH or VCANL (Absolute Max Ratings, voltage range at any bus teminal) is -27V~40V: is this means that when the voltage on CANH and CANL is within -27~40V range, the CANH and CANL will not be damaged? will ISO1050 still working correctly when bus voltage is in this range (-27~-12V, +12V~+40V)? If not, what will happen? will the CAN controller receive any wrong data from ISO1050?
3) the working insulation voltage is 560V for ISO1050DUB and 1200V for ISO1050DW (use ISO1050DW 1200V as example): is this means that when the voltage on CANH and CANL is within 1200V range, the CANH and CANL will not be damaged? Will ISO1050 still working correctly when bus voltage is in this range? If not, what will happen? will the CAN controller receive any wrong data from ISO1050? if yes, what is the difference between Bus Fault protection voltage range(-27~40V) and working insulation voltage range?
4) is that safe to use ISO1050 in a 48V system?
Kevin