Hi, I've made my own RP2350 dev board. I'm going back and forth with JLCPCB because they are asking me to confirm the orientation of the L1 inductor to supply +1V1 before going to manufacturing but I really don't know what is correct.
I've followed the exact orientation as the designing with RP2350 guide. Silkscreen dot above the +1V1 pad of the L1 inductor.
After they asked, I went to check the datasheets again, I'm even more confused now because some source seem to see that the dot should be on the VREG_LX pad?
How is it possible that the RPi foundation on pg. 453 of the datasheet shows the polarity indicator on the right side with the coil winding going counter clockwise and magnetic field direction moving towards the edge and in the very datasheet linked there from Abracon, the dot is still on the right but now the coil winding is going clockwise with the magnetic field direction inwards, away from the edge? Also the + and - flip.
Probably I'm missing something. Can someone please help me understand and answer the following question:
If I am following RPi reference design, where should the polarity dot of the L1 inductor be? on the +1V1 or the VREG_LX side of the L1 inductor pads?
https://imgur.com/a/ezrlcIZ
https://datasheets.raspberrypi.com/rp23 ... asheet.pdf
https://abracon.com/datasheets/AOTA-B20 ... -101-T.pdf
I've followed the exact orientation as the designing with RP2350 guide. Silkscreen dot above the +1V1 pad of the L1 inductor.
After they asked, I went to check the datasheets again, I'm even more confused now because some source seem to see that the dot should be on the VREG_LX pad?
How is it possible that the RPi foundation on pg. 453 of the datasheet shows the polarity indicator on the right side with the coil winding going counter clockwise and magnetic field direction moving towards the edge and in the very datasheet linked there from Abracon, the dot is still on the right but now the coil winding is going clockwise with the magnetic field direction inwards, away from the edge? Also the + and - flip.
Probably I'm missing something. Can someone please help me understand and answer the following question:
If I am following RPi reference design, where should the polarity dot of the L1 inductor be? on the +1V1 or the VREG_LX side of the L1 inductor pads?
https://imgur.com/a/ezrlcIZ
https://datasheets.raspberrypi.com/rp23 ... asheet.pdf
https://abracon.com/datasheets/AOTA-B20 ... -101-T.pdf
Statistics: Posted by shaqowijn — Tue Mar 04, 2025 6:38 pm — Replies 0 — Views 19