Power ManagementのトピックRe: Issue with MFS2613AMDA4AD Custom PCB - Incorrect LDO Voltages and Board Resetting

Issue with MFS2613AMDA4AD Custom PCB - Incorrect LDO Voltages and Board Resetting

alagar — Tue, 31 Dec 2024 12:56:06 GMT

Hi Community,

I’ve developed a custom PCB using the MFS2613AMDA4AD IC, which I got soldered and assembled by JLCPCB. When I power on the module with 12V, I’m observing the following issues:

LDOout1 is outputting 5V instead of the expected 3.3V.
LDOout2 is correctly outputting 3.3V.
The board resets every 8 seconds.

I have followed the schematic from the MRCANHub344 module, but I am unsure how to change LDOout1 to 3.3V.

Could anyone suggest a solution to set the LDOout1 to 3.3V via SPI? I plan to use an STM32 microcontroller to configure these voltages.

Looking forward to your suggestions.

Thank you!

Re: Issue with MFS2613AMDA4AD Custom PCB - Incorrect LDO Voltages and Board Resetting

guoweisun — Thu, 02 Jan 2025 01:20:10 GMT

Hi alagar

Please refer to below picture about SBC OTP result,LDO1 is fixed as 5V no problem.

Unfortunately it only be set during OTP,for MFS2613AMDA4AD has done OTP which can't be done again.

Re: Issue with MFS2613AMDA4AD Custom PCB - Incorrect LDO Voltages and Board Resetting

alagar — Thu, 02 Jan 2025 06:44:06 GMT

so ,i won't be able to set via spi communication ? to 3.3v ?

Re: Issue with MFS2613AMDA4AD Custom PCB - Incorrect LDO Voltages and Board Resetting

guoweisun — Fri, 03 Jan 2025 00:56:46 GMT

Yes!