TUSB4020BI: Driving by the BUS power solution

Kuramochi Tadahiko

Guru 28715 points

Part Number: TUSB4020BI
Other Parts Discussed in Thread: TUSB217, TUSB212

Hi,

My customer is considering that communication distance extends by the TUSB4020BI and it drives by BUS power.

Is such usage supposed on the TUSB4020BI?

Best Regards,

Kuramochi

over 6 years ago

0 Malik Barton57 over 6 years ago

TI__Guru 64326 points

Hi,

Could you give a more detail on what your customer is trying to achieve? Is your customer trying to extend the distance between the USB Host and TUSB4020BI?

0 Kuramochi Tadahiko over 6 years ago in reply to Malik Barton57

Guru 28715 points

Hi Malik-san,

Thank you for your reply.

> Is your customer trying to extend the distance between the USB Host and TUSB4020BI?

Yes, you're correct.

Then, they are considering to VBUS as power supply.

I'm minding VBUS detection by USB_VBUS pin goes wrong.

Best Regards,

Kuramochi

0 Malik Barton57 over 6 years ago in reply to Kuramochi Tadahiko

TI__Guru 64326 points

Hi,

TUSB4020BI does not enhance the host ability to transmit data. If you need to enhance the length between USB Host and TUSB4020BI using a USB 2.0 re-driver like TUSB212 or TUSB217 is necessary.

TUSB4020BI has two power rails at 3.3V and 1.1V and Vbus is a single voltage at 5 V, typically TUSB4020BI is used with an external supply as Vbus in USB 2.0 only application cannot supply the required current.

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TUSB4020BI: Driving by the BUS power solution