Hi, MPS
does MP2980 controller can be used to design a buck/boost circuit which can support 30A output
with 9V-20V vin and 12V vout, do you have reference design,thanks
Hi,
Yes, the MP2980 can be used for this application. Be sure to size your inductor, MOSFETs, and capacitors according to the datasheet for 30A output. We have an evaluation board, EV2980-R-00A, and typical application circuits provided within the datasheets.
Best,
Luke
Hi, Luke
thanks for your reply.
hi Luke
can you give me your email ,i want to send you the sch and layout and please help to check it
Hi， Luke I have send you the SCH and layout files through my company emai,have you see it?
Hello,
For a request such as a schematic review (assuming you don’t want to post on the MPS Forums), please submit a ticket using the following link: Contact MPS - Contact (monolithicpower.com)
Of course, if you are comfortable enough, you may also post your schematic here and I will review it.
how to upload sch and brd file here
Perhaps including a screenshot of an uploaded picture would suffice enough for us to review your schematic. I look forward to looking it over and providing feedback.
Best,
Krishan
Hello again,
Apologies for the delay. After reviewing the schematic, I see nothing out of the ordinary and things look good, as your schematic aligns well with the typical application as shown:
It would be good to heed the pin functions on pages 5 and 6 of the MP2980 datasheet just to be sure you optimize both your schematic and layout. Please reach back if you have any more questions.
Best,
Krishan
Hi， Krishan
I want to know if the Rsense can support 30A vout. and also help to review the MOS and inductor I choose. or do you have recommends of these. MOS is siss64dn of infineon, inductor is XGL1313-332 of coilcraft
Since you mentioned earlier that your voltage at the output was 12V, I can only assume you are referring to Iout instead of Vout. Rsense being able to handle 30A depends on the power rating of Rsense you have, the external FETs that you have implemented, and the way that you sized your inductor.
The MOSFET you selected (SISS64DN) had the following ratings:
The sizing of this FET gives headroom on both the voltage and the current, so this seems well suited for your application.
The Inductor you selected (XGL1313-332) has the following ratings:
This selection seems fine as the voltage and saturation current ratings vs. derated inductance seems like a solid choice for 30A.
In summary the Inductor and FETs you picked are well suited for the job. Just be sure Rsense is able to handle 12V x 30A = 360W at minimum (it would be safe to size this higher).
Best,
Krishan