Power supply issue of TUSB8041

Ted Xu

Expert 4705 points

Other Parts Discussed in Thread: TUSB8041

Hi All.

Two quetions about the power supply of TUSB8041.

1. How to understand the description marked by red? It is confusing.

2. If VDD(1.1V) ramp time is less than 0.2ms such as 0.04ms, what will happen?

Thanks

over 9 years ago

0 Ted Xu over 9 years ago

TI__Expert 4705 points

Hi All
Woudl you help give me your hands?
Thanks

0 Elias Villegas M. over 9 years ago in reply to Ted Xu

TI__Guru* 76130 points

Hi,
I'm sorry for the delay, this note was not added by Apps so we are investigating with systems about the background of this.
We will reply shortly.
Regards

0 Ted Xu over 9 years ago in reply to Elias Villegas M.

TI__Expert 4705 points

Hi Elias

Would you share your comments about these questions?

Thanks

0 Ted Xu over 9 years ago in reply to Elias Villegas M.

TI__Expert 4705 points

Hi Elias

what's the update? Need your powerful supports.

Thanks

0 Elias Villegas M. over 9 years ago in reply to Ted Xu

TI__Guru* 76130 points

Hello,

This is a typo, that note does not belongs to this device, please ignore it, we are working on fixing the datasheet.

Thank you for your observations.

Regards

0 Ted Xu over 9 years ago in reply to Elias Villegas M.

TI__Expert 4705 points

Hi Elias

Thanks for your comments.

But would you share your comment about my question 2?

If VDD(1.1V) ramp time is less than 0.2ms such as 0.04ms, what will happen?

Thanks

0 Elias Villegas M. over 9 years ago in reply to Ted Xu

TI__Guru* 76130 points

Hello,
The rise time is not specified for the VDD11, 0.04ms is a very long rise time so it will not cause any problem on the Power terminals.
They still have to meet the power-up sequence, it doesn't matter how long it takes to the VDD11 to ramp up, they have to follow the power-up sequence taking as a reference when the VDD11 rail is at its valid level.
regards

Interface

Interface forum

Power supply issue of TUSB8041