TUSB1046A-DCI: TUSB1046A-DCI need 2Mohm for SBU1/2?

HOHTA

Prodigy 121 points

Part Number: TUSB1046A-DCI

hi,

Does TUSB1046A-DCI need 2Mohm for SBU1/2?

over 1 year ago

0 Brian Zhou over 1 year ago

TI__Guru** 124470 points

yes, it's required.

reards

brian

0 HOHTA over 1 year ago in reply to Brian Zhou

Prodigy 121 points

Thank you for your reply.
Please tell me one more thing.

I've checked the TUSB1046A-DCI and USB specs and couldn't find any reason why PD resistor is needed.
Where in the TUSB1046A-DCI and USB specifications did you find that you needed a PD resistor? can you tell me that.

(I couldn't find the reason I needed 2Mohm.

TUSB1046 spec just write "SBU1. This pin should be DC coupled to the SBU1 pin on the Type-C receptacle. A 2-M ohm resistor
to GND is also recommended."

And also, input AUXP/N have 100kohm Pu/Pd that's why I don't know why need 2M ohm.

Perhaps it is necessary because the TUSB1046 was not powered and there was an Aux connection from the TypeC connector?)