ISSUE ON BEAGLE BONE BLUE BOARD

[Sreerag MT]

Hi,

I am using beagle bone blue for my project, i am experiencing a issue were multiple board got bricked, only chg led is lighting up on power up.

As i had the design, i could able to check the voltages from OSD, and i found that there is no 3.3v and 1.8v from OSD, kindly help me understanding the issue.

[Neeraj Dantu]

Sreerag,

The power application note for OSD335x provides information on internal power configuration of the SiP: https://octavosystems.com/app_notes/osd335x-power-application-note/. Specifically, Figure 2 shows the power up sequencing of the SiP. You should be able to map the power up sequencing of the faulty boards against the sequence in Figure 2 to see where the PMIC is experiencing problems while powering up.

Also, make sure to test for the PMIC power rails for shorts. If the boards are operated out of spec, it could damage the PMIC power supplies.

Best,

Neeraj

[Author]

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