TPS54160A: Split-Rail Power

Brian Wang0928

Genius 12090 points

Part Number: TPS54160A

Customer is referring to SLVA369A for the split-rail power for 24Vin to +/-15Vout/0.3A.

Could you help to review the schematic below? I think it would need one more 10uF capacitor connected between VIN to PGND on schematic since there is a inverting buck-boost topology for NEG rail, correct? what else suggestion?

Please find additional info. below:

Schematic:

Schottky Diode: STPS2H100

Coupled Inductors: MSD1260 (150uH)

msd1260.pdf

over 1 year ago

+1 Frank De Stasi over 1 year ago

TI__Guru 59165 points

Hello

I think there is some confusion on your schematic regarding the various grounds.

Please compare the app note schematic with your schematic.

I have attached another app note that may be helpful.

Yes, an additional capacitor between VIN and AGND is prudent.

Thanks

3022.snva856a.pdf

0 Frank De Stasi over 1 year ago in reply to Frank De Stasi

TI__Guru 59165 points

Hello

I will close this post.

If you need additional help, you can open a new post.

Thanks

0 Brian Wang0928 over 1 year ago in reply to Frank De Stasi

TI__Genius 12090 points

Thanks for comment.

Since it's first time to design IBB, pls find the updated schematic and review it.

Is the chock inductor ok in application as i attached previous thread?

Thanks.

Brian

+1 Frank De Stasi over 1 year ago in reply to Brian Wang0928

TI__Guru 59165 points

Hello

Please see attached for simplified schematic.

The inductor should be OK.

Thanks

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TPS54160A: Split-Rail Power