LTC4367 for 40A Load

Hi, 

I am evaluating the over-voltage protection circuit and came across LTC4367. I wanted to know if I can use the same for a 40A motor load. I am trying to use it in between my buck and motor controller. My system is running on a battery? 

Thanks a lot for your help. 

Parents
  • +1
    •  Analog Employees 
    on Jan 18, 2021 7:05 PM 2 months ago

    It sounds like the LTC4367 could work for your application.
    Choose FETs with a low RDS(ON) so that temperature of the FETs stay below 175C at 40A.
    This can be checked with some simple calcs:

    PDS=RDS(ON)*40A
    TempRise=PDS*RϴJA
    TempAmbient+TempRise < 175C?

     Consult the datasheet for more detail about FET selection, as well as adding inrush control, and choosing a TVS.

    -Aaron

Reply
  • +1
    •  Analog Employees 
    on Jan 18, 2021 7:05 PM 2 months ago

    It sounds like the LTC4367 could work for your application.
    Choose FETs with a low RDS(ON) so that temperature of the FETs stay below 175C at 40A.
    This can be checked with some simple calcs:

    PDS=RDS(ON)*40A
    TempRise=PDS*RϴJA
    TempAmbient+TempRise < 175C?

     Consult the datasheet for more detail about FET selection, as well as adding inrush control, and choosing a TVS.

    -Aaron

Children