Detailed powering schematic?


#1

Is there a Hardware-Engineer at SinoVoip who can explain how the powering of the M2+ in detail works? Can we see a schematic ?

We are having problems to hold the device over a long time on its maximum capabilities.


(bpi team) #2

BPI-M2+ SCH have public:

https://bananapi.gitbooks.io/bpi-m2-/content/bpi-m2+schematicdiagram.html


#3

I cannot find DC-Port connection and how it delivers power to H3, can you show me ?


(bpi team) #4

here:


(bpi team) #5


#6

Thank you.

SYSTEM is where the DC-Port (5V, 2A) is connected, right?

What is the name of the Chips: U5 and U6 so I can find Data sheet?


#7

Where is the test point to measure VDD_CPUX please?


(bpi team) #8

U5:SY8089AAAC,U6:SY8113BADC


(bpi team) #9

here:


#10

red LED on Power Supply 5,16 Volt (measured on the PCB, Pin39 to power-barrel) GND attached to Pin 39

as reference Pin 1 = 3,23 V Pin 2 = 5,13 V

According to the schematic it should be 1,20V but I measure 1,30V ? Can you explain, why my results do not fit with your schematics ?

here are my results in the picture: (direct link to picture)


Possible header configurations and RTC question
Possible header configurations and RTC question
Website error / wrong information
#11

Am also very interested in this mismatch. And there’s another problem. I’ve never seen any of you @sinovoip or Foxconn guys showing a picture of any of your boards with a heatsink on it.

Both M3 and M2+ are prone to heavy overheating. Do you really never test your boards under real world conditions? Do you care about settings like these: https://github.com/BPI-SINOVOIP/BPI-M2P-bsp/blob/ce11facf03efb8cc1b2f84d220e0a371baba9ba1/sunxi-pack/chips/sun8iw7p1/configs/BPI_M2P_720P/sys_config.fex#L414-L418


#12

@lionwang @BPI_Justin can one of you read this little thread and advise ?


(bpi team) #13

it is right, it limit from 1.1V to 1.4V, we setting it to 1.3V.


Possible header configurations and RTC question
(Leo Xu) #14

If you don’t care about warranty, you can follow this article. :wink:

https://www.nyamoe.com/2017/04/how-to-adjust-the-cpu-volt-of-bpi-m2p-banana-pi/