Power supply for STM32MP157D-DK1-ND development kit specifies 5V/3A. However, can we use fast charger for the same? Specs for the fast charger: 5V/3A , 9V/2.77A (PPS 25W). Will the fast charger supply a 9V/2.77A input instead of 5V/3A. Any suggestions?

[Kevin HUBER]

Hello @VUnni.1​ ,

If you look at the user manual of your board page 10:

https://www.st.com/resource/en/user_manual/dm00652742-.pdf

It is recommended to
use a USB Type-C® to USB Type-C® 5 V/3 A charger.

Otherwise, we can't guarantee whether it will work or not.

Best Regards,

Kevin

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[PatrickF · Accepted solution]

Hi @VUnni.1​ 

to complete the answer from @Kevin HUBER​ , any "USB Type-C compliant" supply rated above 5V/3A will work.

Supply rated 5V/3A , 9V/2.77A (or above) will work as well. Per USB standard, supply must start with a default 5V when pull-down on CC line is detected. The 9V or above voltage will be enabled only after successful 'power delivery' negotiation (which obviously is not done by STM32MP157x-DKx boards).

Even if rated 5V/3A, supply with Type-A socket with a Type-A <-> Type-C cable are usually showing warning (blinking led) but could work (but sometimes not recognized and uboot will stop).

This (old) post could help you.

https://community.st.com/s/question/0D50X0000Bftr1ySQA/power-supply-for-stm32mp157cdk2

Regards.

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