TPS1HB16-Q1: DIA_EN PULLED HIGH

Neal Reda

Part Number: TPS1HB16-Q1

Is it okay to just pull the DIA_EN pin high and still be able to use the diagnostic functions of the chip. We don't have enough pins left on our microcontroller and want to make sure the part will still work correctly if we do this. The data sheet says this pin is active high and as far as we can tell, it doesn't explicitly say that the part needs to see a transition from low to high on this signal. But we wanted to confirm this. Thank you.

over 4 years ago

0 Timothy Logan over 4 years ago

TI__Mastermind 28235 points

Neal,

Yes. It is OK to pull the DIA_EN pin high for this device. Not when diagnostics are enabled the current consumption will be slightly higher on the device.

0 Neal Reda over 4 years ago in reply to Timothy Logan

Prodigy 95 points

Hi Timothy,

Thank you for the quick reply and for pointing out the increased current consumption.

One other question we have is if it would be okay to tie ENABLE and LATCH together?

Thank you,

Neal

0 Timothy Logan over 4 years ago in reply to Neal Reda

TI__Mastermind 28235 points

Hello Neal,

You should be able to connect ENABLE and LATCH together- although there is a caveaut. The LATCH pin is used to reset the device when an over current event occurs (such as a short-to-ground).

If you pull the pin high and are unable to control it from your MCU you cannot "reset" the switch in case of a fault condition.

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TPS1HB16-Q1: DIA_EN PULLED HIGH