TVS3301: Part Comparison and recommendations

Daniel De Sousa

Intellectual 580 points

Part Number: TVS3301
Other Parts Discussed in Thread: TVS2700, TVS2701, TVS3300,

Hi there, we have two protection applications:

Application 1: DC Input

Working voltage: 28V

AMR of device we are protecting = 40V - clamping voltage should be 40V or less

See block diagram below:

Although our system will not operate in reverse polarity conditions, it should not be damaged as it will be protected by our RPP circuit. Is a unidirectional ESD device safe in this case?

Application 2: Battery rail with motors

Working voltage: 25V max

AMR of device = 40V - clamping voltage should be 40V or less

We are considering the following devices:

TVS2700

TVS2701

TVS3300

TVS3301

Questions:

Are the TVS2700 / TVS2701 okay to operate continuously at 28V?

For application 1, do we need to specifically use a bidirectional device? We want to avoid damaging the ESD device during reverse polarity condition

Which one would be best for each application? Could we use the same device for both?

over 3 years ago

0 Matt Smith over 3 years ago

TI__Genius 9806 points

Hi Daniel,

For application 1, I would recommend a bidirectional TVS diode if you are putting it before the reverse polarity protection. If you are putting it after, then a unidirectional diode would work.

Both TVS2700 and TVS2701 can operate continuously as 28 V since their breakdown voltages are ~29 V. The only difference is that you will see about 1 uA of additional leakage.

For both applications, I would recommend TVS2701 if you are not wanting to damage it during reverse polarity events.

Regards,

Matt Smith

0 Daniel De Sousa over 3 years ago in reply to Matt Smith

Intellectual 580 points

Thanks for your response!

Would you recommend putting the ESD system after or before the reverse polarity circuitry?

Can TI provide a VI curve for the TVS2701? We want to understand how much leakage there would be at 3.3V, 28V, 28.5V .etc

0 Matt Smith over 3 years ago in reply to Daniel De Sousa

TI__Genius 9806 points

Hi Daniel,

It's always best practice to put the ESD diode as close to the source of the transient (ie the connector) as possible, so I would put it before the reverse polarity circuitry.

I don't have a bench IV curve but I can provide one from our PSPICE model:

You can access the PSIPCE mode here: https://www.ti.com/lit/zip/slvmct2

Regards,

Matt

0 Daniel De Sousa over 3 years ago in reply to Matt Smith

Intellectual 580 points

Thank you - the TVS2701 should be a good fit for both.

0 Daniel De Sousa over 3 years ago in reply to Daniel De Sousa

Intellectual 580 points

Hi Matt, would you happen to have the TLP curves for the 2701?

0 Matt Smith over 3 years ago in reply to Daniel De Sousa

TI__Genius 9806 points

Hi Daniel,

We unfortunately don't have any TLP data for TVS2701. However, the TLP clamping voltage should not be any higher than the surge clamping voltage since it is a lot shorter pulse.

Regards,

Matt

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TVS3301: Part Comparison and recommendations