TPS63802: Device does not start after power cycling VIN

Habib Mousavizadeh

Part Number: TPS63802
Other Parts Discussed in Thread: TPS22975

Hi There,

I have an issue with the TPS63802. The issue is that it does not get on if I power off and quickly power on input voltage to the chip. Is it known silicon issue or wondering where the problem could be? please advise

Regards,

Habib

over 5 years ago

0 Milos over 5 years ago

TI__Expert 7925 points

Hi Habib,

Thank you for reaching out.

That should not happen.

Is the EN pin connected to VIN pin?
Could you please take scope plots of VIN, VOUT and EN pins while turning the device off and on?

Best regards,
Milos

0 Habib Mousavizadeh over 5 years ago in reply to Milos

Prodigy 30 points

Hi Milos, thanks for your quick response. I sent you the design by email. Can you please comment on that.

Sorry I released that actually the issue is related to the load switch TPS22975 not the buck-boost converter. It could be because of in-rush current!

Thanks, Habib

0 Milos over 5 years ago in reply to Habib Mousavizadeh

TI__Expert 7925 points

Hi Habib,

I did not receive anything, where did you send your files to?

I sent you a friend request here on E2E, after you accept it you can send me your files in a private message.

Best regards,
Milos

Power management

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TPS63802: Device does not start after power cycling VIN