TVS2700: Current flow and operating temperature range

Dice-K

Mastermind 7195 points

Part Number: TVS2700

Hi support team,

I have two questions about TVS2700.

(1)

How can I calculate how much current is actually flowing?

40V spike is reduced to 30V by TVS2700.

About 10V is dropped.

Usually used at 24V.

The reason I want to know is to check if the rating of this IC has been exceeded, and to check if the rating of the diode in the preceding stage has been exceeded.

(2)

Since the ABS of ambient operating temperature range is -40 to 125℃, is there any problem if it is used within this range?

Or is it necessary to calculate the junction temperature from the flowing current?

Although it exceeds 30V, this IC is effective for a moment, but 24V is applied between IN and GND for a long time.

Almost no current flows, so I think that there is no problem, but just in case.

Regards,

Dice-K

over 5 years ago

0 Cameron Phillips over 5 years ago

TI__Genius 12410 points

Hello,

I am not sure what scenario you are referring to but during a surge event there is the votlage and the source impedance (typically 2Ohm or 42Ohms). Therefore with a 40V spike and the device clamps to 30V, 10V across 2Ohm is 5A which the device can handle for the surge waveform of 8/20us.

It all depends on the duration and amount of current that you are putting through the device. It is rated for a surge event that is 8/20us and it can do >25A at that time. For a DC pulse it can only do less than 500mA.

0 Dice-K over 5 years ago in reply to Cameron Phillips

Mastermind 7195 points

Hi Cameron,

Thank you for your reply.

If the value of the source impedance is unknown, is there a way to calculate the amount of current

Best regards,

Dice-K

0 Cameron Phillips over 5 years ago in reply to Dice-K

TI__Genius 12410 points

Hello,

Since current is a function of voltage and impedance it is not possible to tell the current if you only have voltage. I=V/R

Interface

Interface forum

TVS2700: Current flow and operating temperature range