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Part Number: TPS54260
I am planning to use TPS54260 or LM25011 as a step down converter for the system. Input sources are the batteries from cars, trucks etc and output needed is 5V and 2A for the system.
Input should be protected like stated in ISO-7637-2 and ISO-16750-2. What kind of protection circuit i need to build in front of the DCDC?
TI has one application note, SNVA681A, where some protection mechanisms are presented. Can this Load Dump Protection Application Circuit used like presented in Figure 6 also for 24V systems where load dump transients can be as high as 202V?
At least my concern is on Q1 (SFT1342) if V(DSS) = -60V of this FET is enough for this 202V transient? Is there something else I should pay attention.
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In reply to Ambreesh Tripathi:
In reply to user4052185:
In case of 24V, i have not found TVS components that could fullfill the requirements for Pulse 5a and Pulse 5b of ISO-7637-2. That is why I am asking help on your reference design on load disconnect model.
Do you have some more tips on 24V system and 202V load dump protection.
Hi Dan ,
I beleive you could do it with two stage TVS solution . Just a thought for your design :
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