TPD4S480: Short to Vbus protection inquiry

Manu Chang

Part Number: TPD4S480
Other Parts Discussed in Thread: TPS26750

Hi expert,

customers want to confirm that if the short circuit protection of the TPD4S480 is only valide when there is power supply on Vpwr/Vbias?

If there is no supply on Vpwr/Vbias, and the adapter plug in with the CC and Vbus shortage issue, will the PD controller TPS26750 have risks to damage?

BR,

Manu

1 month ago

0 Timothy Logan 1 month ago

TI__Mastermind 39806 points

Manu,

I have assigned this out and am working to get a response. What is the end equipment on this one?

Best Regards,
Tim

0 Manu Chang 1 month ago in reply to Timothy Logan

TI__Expert 3320 points

Hi Tim,

Pls help check on this, the EE is robotics.

BR,

Manu

0 Katilynn Mar 1 month ago in reply to Manu Chang

TI__Expert 6555 points

Hello Manu,

VPWR provides power to all the circuitry for the TPD4S480. Without the power supply the protection device will not function. Below from the datasheet.

The VBIAS pin requires a minimum 63-VDC rated capacitor. A 100-VDC rated capacitor is recommended to reduce capacitance derating. See screenshot from the datasheet below.

Thank you,

Katilynn

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TPD4S480: Short to Vbus protection inquiry