TUSB4041I-Q1: Current consumption during reset

Ryu Yamashita

Part Number: TUSB4041I-Q1

Tool/software:

Hi team,

When GRSTz was Low, current consumption flowed 285.7 mA for VDD and 75.6 mA for VDD33. After reset release, VDD was 32.7mA and VDD33 was 13mA.
Is it a specification that the current consumption of this device increases during reset?
If so, what is the principle behind this increase in current consumption?

Regards,
Ryu.

over 1 year ago

+1 Brian Zhou over 1 year ago

TI__Guru*** 145275 points

Hi Ryu:

There is POR ( power on reset circuit ) inside hub on GRSTz pin. When GRSTz is low, VDD supply current will go high around 300mA. Once GRSTz goes high, VDD current will below 100mA.

Regards

Brian

0 Ryu Yamashita over 1 year ago in reply to Brian Zhou

Genius 3625 points

Hi Brian,

Tell me a few more things.
Does the current consumption rise to about 300mA for both VDD and VD33?
Also, will this current consumption during reset ever be added to the datasheet?
Also, the current consumption during reset generates heat. If the reset is continued, will it affect the life of the product?

Regards,
Ryu.

+1 Brian Zhou over 1 year ago in reply to Ryu Yamashita

TI__Guru*** 145275 points

Hi Ryu:

Ryu Yamashita said:
Does the current consumption rise to about 300mA for both VDD and VD33?

only for VDD, VDD33 is still normal

Ryu Yamashita said:
Also, will this current consumption during reset ever be added to the datasheet?

not in datasheet yet, we just found this recently

Ryu Yamashita said:
Also, the current consumption during reset generates heat. If the reset is continued, will it affect the life of the product?

TUSB4041 was changed from TUUSB8041, VDD can support 700ma. So even it may generate heat if reset is continued, it will not affect the life ofproduct.

Best

Brian

0 Ryu Yamashita 11 months ago in reply to Brian Zhou

Genius 3625 points

Hi Brian,

Thanks for the reply.
In my measurement, there was a 50mA increase in VDD33 at reset, but I wonder why the current consumption went up here.
Are there any plans to include this information in the data sheet?

Regards,
Ryu.

+1 Brian Zhou 11 months ago in reply to Ryu Yamashita

TI__Guru*** 145275 points

50 mA on VDD33 is still normal.

For datasheet update, I need to talk to system to what is our plan.

Best

Brian

Interface

Interface forum

TUSB4041I-Q1: Current consumption during reset