TPD8S300: What's the CC1,CC2 and C_CC1,C_CC2 voltage when floating?

Shaquille Chen

Intellectual 1770 points

Part Number: TPD8S300

Dear Team,

What's the CC1,CC2 and C_CC1,C_CC2 voltage when floating?

My customer feedback that their measurement result is CC1/CC2 are 0.35V and C_CC1/C_CC2 are 0.6V.

Is this normal?

BTW, the Vpwr are connect to 3.0V which is the same voltage as Qualcomn PD voltage.

Thanks

Shaq.

over 5 years ago

0 Ghouse Mohiuddin23 over 5 years ago

TI__Expert 5070 points

Yes, this is normal if it completely floating. The expectation is that the CC pins will have either Rd or Rp from the PD controller in which case this will have not effect.

0 Shaquille Chen over 5 years ago in reply to Ghouse Mohiuddin23

TI__Intellectual 1770 points

Hi Ghouse,

Thanks for your feedback. Do we have spec. for this voltage when floating?

Thanks
Shaq.

0 Ghouse Mohiuddin23 over 5 years ago in reply to Shaquille Chen

TI__Expert 5070 points

Shaq,

There isn't a spec for this. The current drive of this floating voltage is 250nA, which is very very weak. Rp of Rd that Type C requires will easily pull this to down to GND or up to supply. Please let us know if there is some issue that customer is seeing due to this in their system.

Best Regards,
Ghouse

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TPD8S300: What's the CC1,CC2 and C_CC1,C_CC2 voltage when floating?