cancel
Showing results for 
Search instead for 
Did you mean: 

STMH747XIH Power Supply Design

Iris-DM
Associate III

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

 

IrisDM_0-1728384692742.png

 

The board is to be powered by SMPS.

All comments welcome!

1 ACCEPTED SOLUTION

Accepted Solutions
SofLit
ST Employee

Hello @Iris-DM ,

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

SofLit_0-1728402373217.png

So, double check with your schematics.

From RM0399:

SofLit_1-1728402522909.png

From DS12930:

SofLit_2-1728402689043.png

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.

View solution in original post

5 REPLIES 5
STTwo-32
ST Employee

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 

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.

Andrew Neil
Evangelist III

Have you reviewed Application note AN4938Getting 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
ST Employee

Hello @Iris-DM ,

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

SofLit_0-1728402373217.png

So, double check with your schematics.

From RM0399:

SofLit_1-1728402522909.png

From DS12930:

SofLit_2-1728402689043.png

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.

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.

Hello @Iris-DM ,

Could you please give a status on this thread?

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.