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TPS82130: DC/DC converter choice TPS82130 or TPS62130?

Part Number: TPS82130

For a customer of us we are designing a new PCB where we need to generate +5V DC out of +12V for supply of max 6x USB2.0, 2x touch panel (LCD) and for internal logic 

For USB we need max 3A en for 2 displays max 1.9A and for the remaining logic at least 2.5A

Therefore I was thinking of using your TPS82130 converter with integrated inductor. However Webench simulation shows a body temperature of max 105 degrees Celsius at max load which is too much for us (we have no forced cooling).

So I have some options:

- Limiting the max current for the TPS82130 converters to 1.5A . This reduces the body temperature to 59 degrees max which looks acceptable. This means that I need more TPS82130 devices.

- Using TPS62130 with external inductor. Webench shows a temperature of max 69 degrees at 3A load. Still quite high but I think acceptable because the 3A is a worst case situation ( I think that a customer in practive will not use 6 USB ports at max +5Vusb load).

What would you suggest here? The TPS62130 is cheaper but I need an external inductor so the total needed PCB space will be more but possibly I need less converters because the heat is spread between the converter and the inductor. In your datasheet a  COILCRAFT XFL4020-222MEB is suggested. I found a much cheaper 2.2uH inductor with similar specs at Murata but it has a bigger size . Is it possible to use this one or do you suggest the inductor as mentioned in your datasheet?

Best Regards

Chris van der Aar

Sr Hardware Engineer

NTS Systems Development

Eindhoven The Netherlands