TPS84250: The same issue as "TPS84250 Failure when reset" ticket

Seyedkaveh Mazloomi

Prodigy 50 points

Part Number: TPS84250

Hi. I'm having a similar issue as explained on this ticket.

The only differences are:

Output voltage set to 12V

Frequency set to 800KHz

UVLO level set to 15V

All settings are based on Datasheet suggested values.

over 4 years ago

0 iAlejandro over 4 years ago

TI__Expert 8130 points

Hello Seyedkaveh,

What ticket? I do not see a link. Please attach URL.

Thanks,
Alejandro

0 Seyedkaveh Mazloomi over 4 years ago in reply to iAlejandro

Prodigy 50 points

Hi.

Sorry, I thought these would have been automatically linked. This one:

[Resolved] TPS84250 Failure when reset - Power management forum - Power management - TI E2E support forums

0 iAlejandro over 4 years ago in reply to Seyedkaveh Mazloomi

TI__Expert 8130 points

Seyedkaveh,

Can you please provide the schematic? I would like to make sure everything is okay.
I suspect the device might be going into overcurrent protection and it is repeating the inhibit cycle. See Overcurrent Protection Section for more details.

How much droop is at the input? Please provide Input voltage reading.

Thanks,
Alejandro

0 Seyedkaveh Mazloomi over 4 years ago in reply to iAlejandro

Prodigy 50 points

It's the exact design as the one in the datasheet. Output current does not exceed 1.4A. I have confirmed it via a current probe.

There is also no sharp current spike or noise on the 12V output.

0 iAlejandro over 4 years ago in reply to Seyedkaveh Mazloomi

TI__Expert 8130 points

Seyedkaveh,

I really would like to take a look at the schematic to ensure everything is okay. If you do not feel comfortable sharing the info through the forum, I can contact you directly on the email address provided in your E2E profile.

Additionally, please provide the following waveform:

VIN, INH/UVLO, SS and VOUT during normal operation
VIN, INH/UVLO, SS and VOUT during latched up condition

Thanks,
Alejandro