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TPS1HB08-Q1: Why chose between fault and analog Ilim?

Dimitri Weigel21
Prodigy 240 points
Part Number: TPS1HB08-Q1
Other Parts Discussed in Thread: TPS1HA08-Q1,

Hello Everybody,

I noticed by comparing pins / pin-function of TPS1HB08-Q1 and TPS1HA08-Q1 that if I like to set analog current limit I can't use FLT / ST flag anymore (Pin 5).

Was it necessary to use same Pin if you have two of NC (Pin 12 + 13) on both parts?

Then so I can’t use FLT - flag (to disable µC and/or power stage immediately) and set current limit.

The background of my question is this: both functions are great for functional safety purposses! With follow additional benefits:

• Provide fault indication when DIA_EN = 0
• Provide fault indication regardless of SELx pin conditions
• Provide fault indication to a simple digital I/O (rather than ADC or comparator used with the SNS signal)

Why chose between?

Thanks in advance

  • 0
    TI__Genius 12410 points

    Hello,

    Thank you for your feedback. Unfortunately we cannot change the pinout of these parts but we will keep that in mind for future development.

    Also if you would like, because the SNS pin outputs ISNSFH when a fault happens you could build a circuitry that triggers off of that using a comparator and feeding the output into your GPIO pin of your MCU.

  • 0 in reply to Cameron Phillips
    Prodigy 240 points

    Hello,

    Thank you for suggestion with comparator. But it can't reach additional and MUX -independent diagnostic feature (NOR  gate):

    For now I have to live with that.

    Another great function what I want to ment here is: CLAMP / LDO-Mode for VOUT. Also analog to set.

    Keep this in mind for future development.

    Thank You

    Regards