TUSB2046B: TUSB2046B

Peace

Part Number: TUSB2046B

Hello,

I would like to find out whether the VBUS pin of a self-powered device needs to be connected to VBUS (+5V) of the host port or VCC of TUSB2046BVFR?

Thanks,

over 6 years ago

0 Malik Barton57 over 6 years ago

TI__Guru 64326 points

Hi Peace,

What is the specific pin you are referring to? For a Self powered hub Vbus does not connect directly to the device but does help control the DP pull up resistor.

0 Peace over 6 years ago in reply to Malik Barton57

Intellectual 420 points

Hi Malik,

Thanks for your prompt response! The self-powered device is a USB to UART bridge, and I was asking if the VBUS pin of the USB to UART bridge needs to be connected to the +5V VBUS connected to a host. Or, Do I need to connect the VBUS pin to the VCC of TUSB2046BVFR?

0 Malik Barton57 over 6 years ago in reply to Peace

TI__Guru 64326 points

Hi Peace,

Please see the attached reference schematic for a self powered hub. Please let me know if this help answer your question.

2046-PlainSelfPower.pdf

0 Peace over 6 years ago in reply to Malik Barton57

Intellectual 420 points

Hi Malik,

I had seen the reference design already, but it does not have a USB to UART bridge implementation. So, I do not think the reference design is helpful to me.

Thanks,