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TVS-Diodes are wrong orientation #1

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JulianBonk opened this issue Sep 3, 2023 · 4 comments
Closed

TVS-Diodes are wrong orientation #1

JulianBonk opened this issue Sep 3, 2023 · 4 comments

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@JulianBonk
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Hi i just build one of your IotaWatts. When i tried to connect 3v3 from an external power supply the board draws >1A and the voltage breaks down to ~1V.

The issue seems to be, that the TVS diodes you added (D1, D2, D3, D4) are oriented in the wrong way. The central diode goes from P3V3 to GND :
image

but the Datasheet (https://assets.nexperia.com/documents/data-sheet/PRTR5V0U4D.pdf) shows it the other way around:
image
@gkasprow
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gkasprow commented Sep 3, 2023

You are right. I've just received pcbs but didn't mount them yet.

@gkasprow
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gkasprow commented Sep 3, 2023

Just rotate them by 180 degrees

@gkasprow
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@JulianBonk what is the progress? Did you make it running ?

@gkasprow gkasprow mentioned this issue Nov 22, 2023
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@JulianBonk
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JulianBonk commented Nov 22, 2023 •
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I rotated them and now everything works as expected 👍

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@gkasprow @JulianBonk