TUSB322I: What exactly is System_VBUS refers to and VBUS refers to in the schematic diagram mentioned

Supriya C L

Part Number: TUSB322I

Tool/software:

What if I skip using USB VBUS switch and using ferrite beads and capacitors to filter the VBUS from receptacle. In that condition what will be the voltage given to VBUS_DETECTION Pin?

1 month ago

0 Vishesh Pithadiya 1 month ago

TI__Mastermind 38170 points

Hi,

Will this be a UFP or DFP application?

0 Supriya C L 1 month ago in reply to Vishesh Pithadiya

Prodigy 40 points

In UFP mode

0 Vishesh Pithadiya 1 month ago in reply to Supriya C L

TI__Mastermind 38170 points

The Vbus switch is used to send Vbus once CC negotiation is finished. The switch is only used when sourcing Vbus and thus typically in a DFP application. In a UFP application the switch may not be needed. VBUX_DET should be tied to the VBUS connection with a 900k ohm resistor

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TUSB322I: What exactly is System_VBUS refers to and VBUS refers to in the schematic diagram mentioned