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How many LITIX™ BASIC+ LED drivers can be used for one function to meet <10 mA fault mode current?

How many LITIX™ BASIC+ LED drivers can be used for one function to meet <10 mA fault mode current?

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How many LITIX™ BASIC+ LED drivers can be used for one function to meet <10 mA fault mode current?

In total you can use up to 11 LITIX™ BASIC+ LED driver devices for one function on the same ERRN bus.

Rationale:

Referring to the ECs (Electrical Characteristics) "internal supply and EN pin" two parameters are of interest:

  • IS(fault,ERRN): Current consumption during fault condition triggered from another device sharing ERRN bus (all channels deactivated) is < 0.85 mA
  • IS(fault,OUT) Current consumption during fault condition (all channels deactivated) is  < 1.25mA

So in total you can use 11 devices in one function since 1.25mA+(11-1)*0.85mA=9.75mA<10mA.

Find the datasheets and application notes at https://www.infineon.com/cms/en/product/power/lighting-ics/litix-automotive-led-driver-ic/litix-basi...

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