LM5148: Schematic and quickstart review

Noel Binny Abraham

Part Number: LM5148

Tool/software:

Hi Team,

We are planning to develop a 48V to 5V(15A) ,7.5V(17A),12V(8.5A) and 24V(4A) converters (individual boards) using the LM5148 for a UAV application and i would like the schematic/pcb and the quickstart files to be reviewed before it goes into production. I can share the files on private chat/email for review.

I have a doubt on the quickstart for the 24V design i did, the external compensation calaculation gave me a 0pF suggestion for Cc2 cap. Is this ok? Because the PM calulcated is around 50.

Looking forward for a quick reply from your end.

Best Regards,
Noel Binny Abraham

3 months ago

0 David Baba 3 months ago

TI__Mastermind 40040 points

Hello Noel,

It looks to me, the cross over frequency is set quite high as such the high frequency pole is set to a much higher frequency. I do suggest you have a small CHF cap in your design...

Please share your calculator file so I can check. David.Baba@ti.com

Thanks.

David.

0 Noel Binny Abraham 3 months ago in reply to David Baba

Intellectual 535 points

Hi David,

Thank you for your quick reply, i've shared the files on email for you to check. Will share the schematic with you once the quickstart values are finalized

Best Regards,
Noel

+1 David Baba 3 months ago in reply to Noel Binny Abraham

TI__Mastermind 40040 points

Thanks Noel,

Responded, let's take this offline and avoid having two parallel lines of communication, thanks.,

David.

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LM5148: Schematic and quickstart review