TUSB1210: TUSB1210 initial fail

kerr chang

Part Number: TUSB1210

We have usd TI TUSB1210 on system board.

We have fine Vbus(5V) and 3.3 turn on togeter ==> TUSB1210 function is ok
if 5V turn on before DC_3V3 ==> TUSB1210 function will be fail

Have any power sequence for 3.3V and 5V ?

The file is TUSB1210 circuit and TUSB1210 initial fail waveform.

over 5 years ago

0 Brian Zhou over 5 years ago

TI__Guru** 104910 points

we are looking at this issue and will reply soon

0 Brian Zhou over 5 years ago in reply to Brian Zhou

TI__Guru** 104910 points

3.3v should power on first, since VDD33 internal LDO regulator powers the USB PHY, charger detection, and OTG functions of the USB subchip inside TUSB1210

0 joey lee over 5 years ago in reply to Brian Zhou

Prodigy 40 points

Hi Team,

Could you provide the power on sequece and timing specificatin for VBUS, VDD33 and VDDIO?

0 Brian Zhou over 5 years ago in reply to joey lee

TI__Guru** 104910 points

on page 12 of datasheet.

0 joey lee over 5 years ago in reply to Brian Zhou

Prodigy 40 points

Hi Team,

Can you help to point out where the VBUS signal is in the power sequence diagram?

Thank you.

0 kerr chang over 5 years ago in reply to Brian Zhou

Genius 4075 points

Hi Brian
Thank you for your help. BTW , SPEC page 12 did not have show Vbus(5V , Pin22) power sequence .
Please help check again. Thank you.

0 Brian Zhou over 5 years ago in reply to kerr chang

TI__Guru** 104910 points

Vbus should be after VDD15 and before RESETN_PWR

0 Oliver Lin over 5 years ago in reply to Brian Zhou

TI__Intellectual 2935 points

Hi Brian,
Thank you for your support.
Now our customer found Vbus earlier than 3.3V about 3ms, and TUSB1210 works fine.
Customer wants to know any concern or side effects on this design?

Thank you.

0 Brian Zhou over 5 years ago in reply to Oliver Lin

TI__Guru** 104910 points

I don't think it has any side effect. As long as Vbus working, It should be ok

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TUSB1210: TUSB1210 initial fail