Rohm BD71847AMWV-E2 for iMX8MP, is it possible ?

[khang_letruong]

Dear iMX8M Hardware Experts,

I would like to have your confirmation about the possibility to use Rohm BD71847AMWV-E2 as PMIC for the iMX8M Plus platform as there seems to be no explicit info about this combination except for iMX8M Mini/Nano.

Thanks and advance,

Khang

[Rita_Wang · Accepted solution]

You can not use the BD71847AMWV-E2 for iMX8MP, use the NXP PCA9450C in our reference design.

[DR_Akzhol]

Hello Rita,
We developed a board using BD71847 with IMX8MP. So, there is no way to start the board? Why we cannot use BD71847, is it depends on ROM software?

[Rita_Wang]

BD71847AMWV - Data Sheet, Product Detail | ROHM.com

It is used for the i.MX8MM, it won’t boot automatically unless you configure the PMIC correctly and ensure the ROM sees the expected power-up behavior.

This is not a ROM limitation, but rather a hardware and software integration task.

So in your deisgn, recommend you to use the PMIC we recommend will be better.

[sfatyushkin]

We (working with DR_Akzhol) used BD71847AMWV on the product prototype to power the IMX8MP by combining BUCK1 and BUCK5. It started up and works.

[DR_Akzhol]

Got it, thanks

[khang_letruong]

Hi @Rita_Wang ,

Thanks for your confirmation. So it seems that with the crisis of electronics components, especially the recommended PCA9450C, we have no other option than waiting.

Regards,
Khang

[Rita_Wang]

You can also consider the solution do not use the PMIC, use the discrete power supply for every power for the i.MX8MP, make sure to follow the power sequence.