Warning: ESP32 become hot and dead when connected to power source and type-c

Dreamer_mos
Posts: 3
Joined: Mon Nov 11, 2019 4:17 pm

Warning: ESP32 become hot and dead when connected to power source and type-c

Postby Dreamer_mos » Mon Nov 11, 2019 4:35 pm

Hi!

Yesterday I had buried 4 ESP32 Development board...
The symptoms are - when board are connected to external power source to VIN & GND the board become really HOT. I can't even touch it... And then board become dead - the response is FLASH is not reachable ore something similar.

Diagnosis.
When the board powered from external power source (in my case 4S 18650 16.8V 7Ah with ability to support up to 20A) and connected to USB Type-C through USB hub for flashing, Type C are trying to charge notebook from USB. As far as it get not much wats from notebook perspective there is no any sign, that it trying to charge...

ESP_Alvin
Posts: 66
Joined: Thu May 17, 2018 2:26 am

Re: Warning: ESP32 become hot and dead when connected to power source and type-c

Postby ESP_Alvin » Tue Nov 12, 2019 2:50 am

Hi Dreamer_mos,

Thanks for the post. Would you please help share what board you are using? Could you help share the name of the board? Thanks.

Alvin

Dreamer_mos
Posts: 3
Joined: Mon Nov 11, 2019 4:17 pm

Re: Warning: ESP32 become hot and dead when connected to power source and type-c

Postby Dreamer_mos » Thu Nov 14, 2019 8:15 pm

Hi Alvin!

regular development board like this one - https://ru.aliexpress.com/item/32795678 ... lsrc=aw.ds

ESP_Stone
Posts: 19
Joined: Mon Nov 19, 2018 3:59 am

Re: Warning: ESP32 become hot and dead when connected to power source and type-c

Postby ESP_Stone » Fri Nov 15, 2019 8:18 am

Hi,Dreamer_mos :

Can you take a picture to show your test enviroment? As you said, boards gets hot, are VCC & GND shorted?
 

Dreamer_mos
Posts: 3
Joined: Mon Nov 11, 2019 4:17 pm

Re: Warning: ESP32 become hot and dead when connected to power source and type-c

Postby Dreamer_mos » Mon Nov 25, 2019 11:10 pm

Sorry for late answer.

Nope.. GND and VCC is not shorted.

incoming power: 16.8V 14A connected through DC-DC step down (With short protection) 16.8 -> 5V to VCC & GND.

Eggg98
Posts: 2
Joined: Mon Nov 25, 2019 4:59 pm

Re: Warning: ESP32 become hot and dead when connected to power source and type-c

Postby Eggg98 » Tue Nov 26, 2019 12:45 am

What part of the board gets hot? the Esp32 Wroom or just the ams1117 regulator?

https://www.youtube.com/watch?v=OwAZqJ4wpJg

Check this video of the USB type-c connector. Maybe that is what happened.

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