TVS3300: Test Condition

Ryuuichi machida

Part Number: TVS3300
Other Parts Discussed in Thread: TVS3301, TVS1400, TVS0500

Hello,

I would like you to confirm about EMC test condition for this device.

* According to datasheet, there is following description.

"TVS3300 has been tested according to IEC 61000-4-5 to pass a ±1 kV surge test through a 42-Ω coupling resistor and a 0.5 μF capacitor."

I believe that this means that TI use following test environment which is defined in following document.

Reference Doc : https://www.ti.com/lit/an/slva711/slva711.pdf

However, my customer will use following test environment for EMC test.

* Figure 9. Example of test setup for capacitive coupling on a.c. lines (3 phases); line to line coupling. (For Differential mode)
* Figure 10. Example of test setup for capacitive coupling on a.c. lines (3 phases); line to ground coupling (For common mode)

Customer will use this test for Power line. Then I have following questions.

Q1. Is there any problem to use Figure 9 and Figure 10 test condition for this device ?

We are concerned that peak current is different. According to datasheet, 35A is defined as "Absolute Max". However, I'm not sure this can be applied to all test condition or not.

Q2. Can this device use for protection on not only I/O line but also power line ?

(According to datasheet of TVS3300, there is "24 V Power Lines or Digital Switching Lines" description on page 1. However, there is no same description on datasheet of TVS3301.)

Q3. If this device is not suitable for this usecase, could you please introduce other device ?

Customer will use 10V - 30V power, so they target to clamp approx 40V.

Best Regards,

over 3 years ago

0 Matt Smith3 over 3 years ago

TI__Expert 8471 points

Hello Ryuuichi,

These are excellent questions. I don't immediately have enough information to answer Q1 and Q3, but I can answer Q2 for you now. You can use TVS300 on both I/O and power lines. The reason TVS3301 does not list power line protection as an example application is because it is bidirectional device. This means that it could allow a negative voltage onto the power line which could cause damage to down stream circuits.

I will get back to you on Q1 and Q3 by Monday (9/28), if not sooner.

Regards,

Matt Smith

0 Ryuuichi machida over 3 years ago in reply to Matt Smith3

Guru 11515 points

Hello Matt-san,

Thank you for your reply.

Customer is now validating their custom board. So, I hope that I can get prompt reply for Q1 and Q3 as well.

Best Regards,

0 Matt Smith3 over 3 years ago in reply to Ryuuichi machida

TI__Expert 8471 points

Hello Ryuuichi-san,

Q1: The max current this device can survive is 35A. It will not survive the 500V/2 ohm (250A) and 1kV/12ohms (84A) tests.

Q3: Unfortunately, the highest currents our devices can withstand right now is 43 A (TVS1400 and TVS0500), so I do not have a device to meet your requirements. One solution to this would be to use multiple devices, but that probably is not cost or space-effective.