ADM3057E VIORM definition

Hi ADIExpert

I have a ESS system as below functional block, one battery stack is composed of 14 series packs that provides voltage up to 1kV

each battery pack is communicated with  master control board with iso CAN bus implemented by ADM3057E

May I know in this scenario, how do we define VIORM of ADM3057E?

on the other hand, Is there any constrain on the stackable ADM3057E in this system architecture?

thank you

Ken

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  • +1
    •  Analog Employees 
    on Feb 26, 2020 5:31 PM over 1 year ago

    Hi Ken,

    Viorm is the working voltage based on 50/60Hz line voltages. It sounds like this may be a DC application so Table 11, Maximum Continuous Working Voltage in the ADM3055E/ADM3057E datasheet may be a better guide here. 

    An isolator is actually two parallel isolation systems. There is the signal path with planar transformers and then there is the packaging. The packaging isn't particularly glamourous but its necessary and makes good place to start. To figure out what is needed for packaging, we need to look at where people may come in contact with the system and determine if we need basic, reinforced (or double) insulation. Then consider the pollution degree, and the standards that need to be met. This should give us the minimum creepage requirements. 

    Then consider the signal path with the information in Table 11. 

    Regards,

    Jason

Reply
  • +1
    •  Analog Employees 
    on Feb 26, 2020 5:31 PM over 1 year ago

    Hi Ken,

    Viorm is the working voltage based on 50/60Hz line voltages. It sounds like this may be a DC application so Table 11, Maximum Continuous Working Voltage in the ADM3055E/ADM3057E datasheet may be a better guide here. 

    An isolator is actually two parallel isolation systems. There is the signal path with planar transformers and then there is the packaging. The packaging isn't particularly glamourous but its necessary and makes good place to start. To figure out what is needed for packaging, we need to look at where people may come in contact with the system and determine if we need basic, reinforced (or double) insulation. Then consider the pollution degree, and the standards that need to be met. This should give us the minimum creepage requirements. 

    Then consider the signal path with the information in Table 11. 

    Regards,

    Jason

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