RAK3172L-SIP - BOM and Schematics

LPWAN Nodes
1

Hello Team RAK,

I tested the RAM3172L-SIP for use in EU and now would like integrate exactly the same schematic/layout as the breakout board.

Would it be possible to get:

  • BOM with details (e.g. what Ferrit Beads are used?)
  • The schematics of the Breakout board with
  • Assembly/Layout (for copying the component placement on my PCB)

If possible: do you have this as KiCad files?

Thank you very much!

Excellent product! However, if you ever consider the RAK3172-Module as L-Version (and with TCXO) this would be really, really GREAT :wink:

Best regards,
Jo

2

Hi @JoEm ,

These are the info you need.

  1. BOM- Aside on the RAK3172LP-SiP, headers and passives. The critical ones are the bead and inductor. Here’s the part number of the bead (BLM15PD121SN1B ) and inductor (LQM21DN150M70L)

  2. Schematic link

  3. Attached is the Gerber file. We do not have Kicad files for the breakout board

  4. Kicad schematic symbol and PCB footprint is available in Snapeda - RAK3172-SiP footprint & symbol by RAK | SnapMagic Search

RAK3272-SiP_VA_2022_0213_1_gerber.zip (94.1 KB)

3

Hello Team RAK-Team,

I wonder about the schematics. For Low-Power Mode the ST-Datahsheet tells me to connect VDDPA to VFBSMPS (1.55 Volts):
image

But the schematic link of the Eval-Board has VDDPA connected to VDD (3.3V)?
This is also what I find on the RAK3172LP-SIP Breakout-Board.

I came accross this issue, because my protos Proto RAK3172LP-SIP draw higher current than expected (ca. 57mA @ 14dBm). Still less, than if Standard RAK3172-SIP is used, but much more than other LoRa modules I knew.

Does the schematic for the RAK3172LP-SIP require VDDPA as 1.55V or 3.V?

Thanks,
Jo

4

Hi @JoEm ,

Your observation is correct. We are releasing a new Breakout Board for RAK3172LP-SiP with VDDPA going 1.55V (VFBSMPS). We weren’t able to changed the breakout board when we released the RAK3172LP-SiP which is a year later after than the original RAK3172-SiP was launched.