i.MX Processors中的主题 MMPF0200F6AEP

MMPF0200F6AEP

1773750986 — Wed, 20 Feb 2019 10:22:31 GMT

According to the official imx6solox development board, I designed a similar development board, but after power-on, the power chip MMPF0200F6AEP, SW2_3V3 output is only about 2.7V, other power supplies have no output or less than the set voltage, resulting in the board can not work.I don't know where the problem is, no idea.

Re: MMPF0200F6AEP

igorpadykov — Wed, 20 Feb 2019 23:21:40 GMT

Hi zhang

one can check Figure 6. Default Start-up Sequence and PWRON, SNVS

voltages with oscilloscope, as they may affect turn on event which is described in

sect.6.1.2.2 PWRON Pin , sect.6.4.2.1Turn On Events MMPF0200 Datasheet

https://www.nxp.com/docs/en/data-sheet/MMPF0200.pdf

Best regards
igor
-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------

Re: MMPF0200F6AEP

1773750986 — Thu, 21 Feb 2019 11:48:24 GMT

thanks igorpadykov！i find i make a mistake with the footprint of the reset button，which led to reset always！ when i remove the reset button ，the power can be normal sometimes.

Because I find when the first time i power up the board , the led which controlled by VGEN3_2V8 is always blinking .the output voltage of MMPF0200 is not normal.but if i power down and then quickly power on the board again ,the led which controlled by VGEN3_2V8 is lighted nomally,then i measure the output voltage of MMPF0200 ,and find that the output are all normal.can you tell me why ?