STMH747XIH Power Supply Design

Iris-DM · ‎2024-10-08

I am looking for some overview on my custom STM32H747 PCB design - mainly that my schematic for the power supply and VCAP etc. are correct

The board is to be powered by SMPS.

All comments welcome!

SofLit · ‎2024-10-08

Hello @Iris-DM ,

This is the part of Schematics for SMPS config (in blue) from STM32H747 DISCO schematics :

So, double check with your schematics.

From RM0399:

From DS12930:

Hope it helps.

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View solution in original post

STTwo-32 · ‎2024-10-08

Hello @Iris-DM

Let me recommand you to take a look at the AN4938. Also, you can refer to the design of the STM32H747I-DISCO. They should be helpful.

Best Regards.

STTwo-32

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Andrew Neil · ‎2024-10-08

Have you reviewed Application note AN4938, Getting started with STM32H74xI/G and STM32H75xI/G MCU hardware development:

https://www.st.com/resource/en/application_note/an4938-getting-started-with-stm32h74xig-and-stm32h75xig-mcu-hardware-development-stmicroelectronics.pdf

SofLit · ‎2024-10-08

Hello @Iris-DM ,

This is the part of Schematics for SMPS config (in blue) from STM32H747 DISCO schematics :

So, double check with your schematics.

From RM0399:

From DS12930:

Hope it helps.

To give better visibility on the answered topics, please click on "Accept as Solution" on the reply which solved your issue or answered your question.

Richard Li · ‎2024-10-08

C47 and C45 should change, normally parallel two decoupling capacitors, one for low frequence, one for high frequence, so should like C41,C39, C47 can change to 100 nF, C45 increase to 10 uF if you want.

SofLit · ‎2024-10-23

Hello @Iris-DM ,

Could you please give a status on this thread?

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