LM63615-Q1: LM63615DQPWPRQ1 - Pulse 5b of 35V (400ms) - is sustainable? - 15 Pulse each/min.

Hello Shubham,

Can you share the part numbers and/or links to datasheet of the TVS being considered for this design?

I often see customers considering 33V TVS for 12V battery designs, though, of course, extensive validation is preformed on the design to ensure robustness.

Hello Beck,

Thanks for the reply. TVS part is SZ1SMB24CAT3G ; During the Pulse 5b - This TVS remain in Breakdown region and Damage due to Excessive current as our Load dump is of 35V and it is not fully clamped.

In our design there is no any Overvoltage protection - We are using only TVS for Transient Pulses. 

We are also considering the 33V TVS from Littlefuse but for Pulse 1b - We have raised the below Query

As we are using the LM63615DQPWPRQ1 in our design, As we are testing it for Transient Pulse 1b as per the ISO 6737-2, so max voltage will be appeared across the device is 43.5V for 2ms - after every 5Sec for 500 Repetitive pulses.  

As max. Absolute rating of device is 40V, so can device withstand with the Pulse 1b of 43.5V for 2ms.

Can you please specify the behavior?

Awaiting for your reply.

Hello Beck,

i got it. Thanks for the reply.

You are welcome.