LM5021-Q1: Schematic review

Nam, Dino

Part Number: LM5021-Q1
Other Parts Discussed in Thread: LM5021

Dear team,

My customer would like to us LM5021-Q1 for below requirement. Please review below schematic and let me know your opinion whether below schematic is operating normally or not.

1. 24V DC input , Isolated 24V output

2. 24V DC input, Isolated +-15V output

Thank you.

7 months ago

0 Manuel Alva Hernandez 7 months ago

TI__Expert 8801 points

Hi Nam,

Please provide PPMID for this schematic review.

Thank you

0 Nam, Dino 7 months ago in reply to Manuel Alva Hernandez

TI__Expert 6285 points

Hello Manuel,

Thank you for your comment.

I am sorry but this project is concept stage so I didn't input this project in PPM yet. I will update this project in PPM by e/o this month.

After input in PPM, I will share PPMID.

Please review customer schematic in advance.

Thank you.

0 Nam, Dino 7 months ago in reply to Nam, Dino

TI__Expert 6285 points

Hello Manuel,

Is there any feedback on this request?

If there is no PPMID, can't you review it?

please let me know your opinion.

Thank you.

0 Manuel Alva Hernandez 7 months ago in reply to Nam, Dino

TI__Expert 8801 points

Hi Nam,

I will be back to you tomorrow morning.

Thank you

0 Manuel Alva Hernandez 7 months ago in reply to Manuel Alva Hernandez

TI__Expert 8801 points

Hi Nam, I reviewed you schematic.

Component selection around the LM5021, feedback control components, Cbulk and clamp looks good to me. The inductor value of your transformer is not mentioned in the schematic, but you can verify its value with the minimum input voltage VIN_min and switching frequency fsw with the following equation:

Pin is the maximum output power divided by the target efficiency.

Thank you

Power management

Power management forum

LM5021-Q1: Schematic review