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TLV62569: TLV62569DBVR Use exception consulting

yingjiao LI

Expert 1375 points

Part Number: TLV62569

Tool/software:

Hi

Our use of this product is not satisfactory.
Symptom: The product uses 12V power supply and supplies 5V power to TLV62569DBVR after 3903 voltage regulation.
Power on moment TLV62569DBVR 5 Power supply input short circuit, or output short circuit, found 5V input short circuit, output short circuit, output voltage rise and other phenomena

Could you please confirm the reason

Thanks

0 Josef Marsmann 7 months ago

TI__Expert 6510 points

Hi Yingjiao,

I couldn't find the TLV62569DBVR on your schematic. Component U2 has a different pinout and also the inductor is missing.

Best regards,
Sepp

0 yingjiao LI 7 months ago in reply to Josef Marsmann

Expert 1375 points

Hi

Sorry, part of the schematic diagram is missing, please help to confirm it
thank you

0 Josef Marsmann 7 months ago in reply to yingjiao LI

TI__Expert 6510 points

Hi Yingjiao,

Which inductor you are using, I can't read it in the schematic. In general the schematic looks ok.

Best regards,
Sepp

0 yingjiao LI 7 months ago in reply to Josef Marsmann

Expert 1375 points

Hi

The inductance is marked on the attached drawing

0 Josef Marsmann 7 months ago in reply to yingjiao LI

TI__Expert 6510 points

Hi Yingjiao,

I don't see an issue with the schematic and inductor.

Please take some measurements on the VIN and VOUT of the TLV62569 device at start-up to see probably some overvoltage or strange behavior.

Best regards,
Sepp