TPD2E2U06-Q1: Reverse Polarity Protection - TVS diode coordination with fuse

Subrahmanyam V

Part Number: TPD2E2U06-Q1

Hi,

I have a battery in series with a fuse followed by a TVS for reverse polarity protection.

Let us say, my fuse takes 10ms to blow at 40A when I reverse connect the battery.

How do I coordinate the TVS and fuse, such that the my fuse blows even before my TVS damages at 40A in case of battery reversal?

Nowhere in the datasheet, the power dissipation of the TVS in forward bias is specified.

How much power does TVS handle in forward direction of conduction? How do I calculate the time required for the TVS to thermally damage given the time taken by fuse for 40A is 10ms?

Thanks,

Subbu

over 4 years ago

0 Cameron Phillips over 4 years ago

TI__Genius 12410 points

Hello,

This is not possible with this device. It is an ESD diode and cannot handle longer transients than the data sheet outlines.

0 Subrahmanyam V over 4 years ago in reply to Cameron Phillips

Intellectual 430 points

Just to confirm,

What you say is that TVS cannot be used along with a fuse for reverse polarity protection, right?

0 Cameron Phillips over 4 years ago in reply to Subrahmanyam V

TI__Genius 12410 points

Hello,

Not this device in particular. I would recommend maybe a SMB or SMC TVS device that can handle longer transients.

0 Subrahmanyam V over 4 years ago in reply to Cameron Phillips

Intellectual 430 points

Thanks.

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TPD2E2U06-Q1: Reverse Polarity Protection - TVS diode coordination with fuse