external smps regulator for STM32H7

General discussion about topics related to OpenMV.
User avatar
chrisPyres66
Posts: 138
Joined: Mon Jul 16, 2018 9:22 am
Location: France

external smps regulator for STM32H7

Postby chrisPyres66 » Wed Sep 18, 2019 4:55 am

Dear all,

I was working on web (lol), and i red this st forum post :
https://community.st.com/s/question/0D5 ... -core-smps
about using external smps regulator in place of internal ldo regulator to save energy for STM32H743.

That is right in new stm32h7xx with embedded smps, the consumption is divided by 2 compare to embedded ldo.

Do you have any idea, or roadmap about this ?
It seems to cost an external smps regulator with components and Register to change at start for soft.

Thanks,
User avatar
iabdalkader
Posts: 1088
Joined: Sun May 24, 2015 3:53 pm

Re: external smps regulator for STM32H7

Postby iabdalkader » Thu Sep 19, 2019 10:03 am

No, but in the next revision we're going to add a pull-up on sensor power-down as discussed here in another topic, should lower the power consumption in low-power mode.
User avatar
chrisPyres66
Posts: 138
Joined: Mon Jul 16, 2018 9:22 am
Location: France

Re: external smps regulator for STM32H7

Postby chrisPyres66 » Fri Sep 20, 2019 5:04 am

Yes, or you can just add a fet transistor to switch off and re-on the camera as you need !

I am looking at the moment to have a low consumption for H7, and it is more complicated than F7 :
- In standby mode, if you switch off camera, switch on RTC, BACKRAM, SWD GPIO, you can have less than 5µA.
- In stop mode, you can have 600uA but Usart 1/3 are not available in domain 2 compare to UART5 on PB12/13

Return to “General Topics”

Who is online

Users browsing this forum: No registered users and 1 guest