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The official documentation for Raspberry Pi computers and microcontrollers
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Error in documentation: Raspberry Pi Pico 2 W powerpath schematic #3951

Open jalzat-e opened 1 day ago

jalzat-e commented 1 day ago

In the Raspberry Pi Pico 2 W documentation, in the schematic of the power path for batteries (page 18), drain and source are swapped. If the schematic is followed as it, the MOSFET reverse diode could drive current to VSYS from the battery even if VBUS is still present, defeating the purpose of the power path. powerpath pico2w

lurch commented 1 day ago

ping @dp111

dp111 commented 1 day ago

If I understand you correctly this will only happen when Vsys is below VBatt i.e. exactly when you want Vbat to take over powering the Pico. If you swap the drain and the source then VSys could end up permanently charging the battery causing damage.

On Tue, 3 Dec 2024 at 16:45, jalzat-e @.***> wrote:

In the Raspberry Pi Pico 2 W documentation, in the schematic of the power path for batteries (page 18), drain and source are swapped. If the schematic is followed as it, the MOSFET reverse diode could drive current to VSYS from the battery even if VBUS is still present, defeating the purpose of the power path. powerpath.pico2w.png (view on web) https://github.com/user-attachments/assets/94b09df3-013c-4cc2-83b7-d48afce83d6e

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