Hi TI Team,
We are planning to use TVS2201 in our design to protect against ISO7637-2 pulses ( Pulse1, 2a, 3a, 3b only)
I could not find following parameters in datasheet, can you share
1. Graph with respect to Pulse with(td) and peak pulse power(Ppm).
2. Graph with respect to Junction temperature(Tj) and peak pulse power/current percentage /Power derating percentage.
3. Junction (Tj) temperature of diode
Could you help with the above information.
Thanks & Regards,
Murali Penta
Hi,
We don't have a Ppm over pulse width graph. We have the voltage and current waveforms for an 8/20us pulse and you can derive the power.
We don't have any data over junction temperature for power or current ratings. We don't typically spec a max junction temperature since the junction only heats up significantly for DC voltages above the working voltage. These diodes are designed to protect from ESD/Surge events that have pulse widths in the nS-uS range so the junction doesn't heat up signficantly during these events due to the short pulse durations.
This device has a 30 A current rating across temperature, so at any ambient temperature under 125C this device can handle 30 A of surge current per IEC 61000-4-5 (8/20-uS)
Longer pulses such as some of those specified in the ISO7637-2 standards will contain significant amounts of energy due to large currents over pulse widths in the ms and above. Depending on the source voltage chosen, some of the ISO7637 pulses such as pulse 2a will produce large currents for pulse durations longer than the IEC 61000-4-5 8/20us pulse. Were you trying to calculate if the TVS2201 could survive these pulses? What source voltage would you need for the different pulses?
I have been looking into testing some of our devices to see if they can withstand these pulses, I could test this device as well depending on the source voltage requirements.
Regards,
Sebastian
