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Synchronous-Buck Converter's Current Limit's max value （About：TPS54310,TPS54380,TPS54610,TPS54680,TPS54810,TPS54880）

Pokkun
Genius 4695 points
Other Parts Discussed in Thread: TPS54610, TPS54880, TPS54310, TPS54680, TPS54380, TPS54810

Hello.

My customer is currently in considering TPS54310,TPS54380,TPS54610,TPS54680,TPS54810 and TPS54880,now.

（For the power supply line "5V⇒3.3V/4A" and "5V⇒1.5V/3A"）

I have gotten a question about this product .

So, please teach me about the question.

＜Question＞

The considering devices doesn't define ”Current limit trip point's max”.

But please tell me an estimate of the worst case value.

Because, the customer due to be worried if the  can use an saturation current of inductor.

 

Could you help us?

Best Regards,

Pokkun

  • 0
    TI__Guru**** 191445 points
    Those are all pretty old devices (although I think they are still good ones, especially if you like voltage mode control). If memory serves, the current limit distribution is fairly symmetrical, So the maximum current would be the same difference above the typical as the minimum is below the typical.

    There may be archived distribution data for it, but it would require a deep search. Let me know if the above answer is sufficient. It may be a week before I could search for other data.