TPD1S414: USBC 20V VBUS with 26V abs max. Which TVS should I use?

Brian Antheunisse

Part Number: TPD1S414
Other Parts Discussed in Thread: TVS2200, TVS1800, , TPD1S514

Tool/software:

I have a customer designing a high volume product with USBC, but only 5V VBUS (no PD). They would like to protect against the case of a non-compliant USBC cable that presents a hot 20V to the system. The downstream components have an absmax of 26V, and surge testing has shown spikes exceeding 26V.

My question:

TVS2200 is the one I normally think of first for USBC VBUS, but it doesnt clamp until beyond 26V so in this case it wont work.
TVS1800 seems to clamp near 20-21V, so I worry a hot 20Vdc cable would just burn this thing up.

you agree with those two statements? Is the TPD1S414 the best device for this condition?

Thanks,

Brian

4 months ago

0 Field Tolson 4 months ago

TI__Genius 10772 points

Hi Brian,

Due to the holiday in the US, many of the device experts are currently out of the office. When they return they will look into this and provide a response. Please expect some delay accordingly.

Thanks,
Field

0 Adam Mc Gaffin 4 months ago in reply to Field Tolson

TI__Mastermind 28910 points

Hi Brian,

The TPD1S514-1 would be the best device to use for this type of scenario. You can reference the following app note. It is for a source application but the same should be applicable for a sink application. The TVS2200 would be used in addition to the TPD1S514-1. They serve two different purposes. The TVS2200 is intended to clamp higher voltages for a shorter period of time where the TPD1S514 isolates the system from the high voltage even by opening its power path.

https://www.ti.com/lit/pdf/slvae35

0 Brian Antheunisse 4 months ago in reply to Adam Mc Gaffin

TI__Expert 5265 points

Adam - Expect John to reach out on this, but I would like to understand why the TPD1S414 cannot do this. It seems like a one chip solution to handle the 20V DC and the 26V surge.

closing the thread for now, but feel free to respond here if you want the public to be able to see the answer.

Thanks,

Brian

+1 Adam Mc Gaffin 4 months ago in reply to Brian Antheunisse

TI__Mastermind 28910 points

The TPD1S514 is the follow on to the TPD1S414.

Reviewing the TPS1S514 again, this will likely meet the customers requirements as it has a clamping diode integrated in addition to the power switch.

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TPD1S414: USBC 20V VBUS with 26V abs max. Which TVS should I use?