STM32mp157F DK2 burned

[karu2003]

First acquaintance with STM32mp157FDK2. A couple of weeks ago I bought two sets to try. In a week I figured out how to put together my image with Yocto. And today what was supposed to happen happened. I connected the KIT to the power supply with PD3. KIT is broke. The thermal camera shows strong heating. STPMIC1APQR short circuit STPMIC1APQR. burned out. Unsuccessful test STM32mp1.

Andrew.

[AScha.3]

How did you power the kit ?

Check real voltage of your power supply output.

(Your description telling nothing about, but something like this is typical for too high voltage or ESD event.)

[karu2003]

his is PD3. The voltage can be up to 20V. How do ST manage CC1 and CC2?  have ST any overvoltage protection? 

for ESD why didn't it work ESDA7P120-1U1M

[AScha.3]

Really 20V ?

from manual UM2637 :

+

the STPMIC ds :

[karu2003]

STM32MP1157F-DK2 cannot operate power supply from PD3 source?

USB-C PD3 can provide voltage up to 20V.

[AScha.3]

Hmmm- whats PD3 ?

see circuit:

CN6 is power in, 5V (3A) .

+

warning...

[karu2003]

usb-c pd 3.0

[AScha.3]

No. See circuit diagram... usb-c -> 5V -> to STPMIC1A .

No fast charging - only fast killing. 🙂

[karu2003]

Why isn't this written anywhere? :( 

I threw 100€ in the trash.

https://www.digikey.de/de/products/detail/stmicroelectronics/STM32MP157F-DK2/13536968?s=N4IgTCBcDaIM4BcC2BmMSAOBGArAdgDEACAEwGsIBdAXyA

[AScha.3]

Come on, i just looked at the manual -> power -> and showed it here.

And if you you look at the circuit - you see the CN6 -> 5V input . Nothing else there.

So if the charger puts out 5V , everything fine. But if it tries fast charge... ok. you know now.

manual says:

btw

I have a quick charger plug , is labeled : A output : 5V , 3A ; B+C output : 5V/9V/12V , 2A .

So if using the 5V output, everything fine.