TPS2069: Fault drain connection to Vout

firat nur

Part Number: TPS2069

The datasheet for this part suggests connecting the Fault pin to Vin. I have seen designs where the fault line is instead connected to Vout to drain the output current. Is it ok to connect the fault line to the output? What are the design choices we can make to decide whether to connect to input or output? Thanks

over 6 years ago

0 Bob Ma over 6 years ago

TI__Expert 8980 points

Hi,

We don't recommend to connect fault to VOUT. Fault is an active low open-drain, so it need to be pull up to a stable voltage like Vin, so that fault pin can always be high as long as fault is not asset. Why do you consider to pull up fault to output?

Regards,
Bob

0 firat nur over 6 years ago in reply to Bob Ma

Prodigy 30 points

Dear Bob,

Thanks for your response. I just wanted a clarification as I have seen designs with the beforementioned configuration.

Firat

0 Bob Ma over 6 years ago in reply to firat nur

TI__Expert 8980 points

Hi, Firat,

Thank you for your clarification. Feel free to reach out if any more questiones.

Regards,
Bob

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TPS2069: Fault drain connection to Vout