TPS62870: Buck Converter

Hi,

Most of our devices have peak current limit to prevent damage. So you need to choose a converter which have the ability to source 15A. But we don't have such a product. 

I recommend our controller LM25148 for you. And a possible choose is LMQ644A2-Q1, which can handle 12A continues, but may reach limit when need 15A.

Thank you.

BR,

Shipeng

Hi Shipeng Cheng

Thanks for your reply but it's seems like your reply doesn't match with the TI portfolio.
I did some research and found some buck converter IC that can source current more than 15A. Can you help me to choose a cost effective and low BOM count solution. 
Thanks

Hi,

Don't you need Vinmax to be 36V? The devices you show is only 6V. They will be damaged if you give a 36V input.

Yes,

You are right. I need 36V input. I found one IC but i need your help for it's pcb design files or some reference design.LMQ644A2-Q1

It has 12A max current.

I need two output voltages 7.4V and 8.4V(one at a timr).

I don't mind having a jumper to select a resistance between these two output.

Also i searched using integrated MOSFET. I am also open for external mosfet solution as long it can reduce BOM and size of the board. I have limited space.

Thanks 

Hi,

LMQ644A2-Q1 is integrated MOSFET. If you use a jumper, it is easy to design. Just put two resistors in series from FB to GND and use a jumper to short one to configure output voltage. 

Thanks.

BR,

Shipeng

Hi Shipeng Cheng

Is there any reference design or webench design available for this IC?

Thanks 

Hi Shipeng Cheng

Can you provide me PCB project files for this EVM plz?
https://www.ti.com/tool/LMQ644A2QEVM-S2100#tech-docs

Thanks

Hi Ali,

The product expert is out of the office now. TI responses may be delayed during the year end holiday season until Jan 2nd, 2024.

Thank you for your patience and I wish you happy holidays.

Best Regards,

Ryan

Hi,

Sorry we can't provide gerber files. You can only refer to the layout pictures in the EVM user's guide.

Hi Shipeng Cheng

Is there any reason that you can't provide PCB design files? TI always offered design files of EVM because it is the main purpose of EVM to test and evaluate the performance of chips. 
Can you provide me stackup layer information at least because i am expecting the same results as EVM and if i will not able to achieve it then its not good.
I hope you will understand it and share the design files.
You can also guide me if i have to apply some form to get it.
Thanks

Hi Miranda Gu

Can you help me with it plz?
I need pcb design files for this EVM as well for another version of the board.
https://www.ti.com/tool/LMQ644A2QEVM-S2100#tech-docs
Thanks

Neverminded, I changed the IC because it is out of stock.
I changed the whole design to LM5145
Thanks for your help.