TCAN1042HGV-Q1: Question about ABS max rating!

Paul Yeh

Genius 16185 points

Part Number: TCAN1042HGV-Q1

Hi team,

My customer would like to know what is its endurance time if VBUS voltage is above 58V (this is ABS max voltage rating)

Do we have this kind of data?

Thanks

over 3 years ago

0 Clemens Ladisch over 3 years ago

Guru 317280 points

The absolute maximum ratings must not be exceeded, not even for a short time.

(ESD tolerance is according to the respective specifications.)

0 Chris Ayoub over 3 years ago in reply to Clemens Ladisch

TI__Genius 15345 points

Hi Paul,

Just to confirm what Clemens said, exceeding the absolute maximum ratings of any device for any time at all can damage the device.

For CAN if you know your device will be in an environment where it might get a short surge of voltage, customers typically protect the CAN bus using a TVS diodes. TVS diodes are made to clamp a short transient voltage so that it does not exceed the absolute maximum rating of the device. However, if your transients are longer than what the TVS diode is rated to clamp the TVS diode can fail and the CAN device might see the full voltage at it's CANH and CANL pins.

If you would like more information on how to design a CAN bus using TVS diodes I would recommend reading this App Note.

Best,

Chris

0 Eric Schott1 over 3 years ago in reply to Chris Ayoub

TI__Guru 53575 points

Hi Paul,

Keep in mind that the 'H' versions of this device have an absolute maximum bus rating of ±70V. These devices can withstand voltages that exceed ±58V indefinitely, as long as the ±70V limit is respected.

Regards,
Eric Schott

0 Paul Yeh over 3 years ago in reply to Eric Schott1

TI__Genius 16185 points

Roger that! thanks

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TCAN1042HGV-Q1: Question about ABS max rating!