5 months ago

Profile:Raspberry Pi Backpower Adapter

Open source license: CC-BY 3.0

Project source: Cloned from BackpowerAdapterRevA

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Sometimes it's not possible or really tedious to get a USB cable to the USB connector for power input on a Raspberry Pi. Since the 5V pins, the USB power connector and the USB hub share the same power rail, it doesn't matter where the electrons enter and exit. The only difference is that the Pi has a few capacitors, a resettable fuse and a diode directly behind the USB input. When powering the Pi via the 5V pins on the 40pin header, this protection and the capacitors to deal with sudden power draws won't work.

To make back-powering the Pi via the USB hub a bit more convenient, I made these backpower adapters that contain the same resettable fuse, capacitors and diode as the Raspberry Pi design.


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ID Name Designator Footprint Quantity BOM_Manufacturer Part BOM_Manufacturer BOM_Supplier BOM_Supplier Part Price
1 10uF C1,C2 C1210 2 C1210C106M4PAC7800 KEMET LCSC C141046 0.1001
2 SMBJ5.0A D1 SMB_L4.6-W3.6-LS5.3-R-RD 1 SMBJ5.0A Brightking LCSC C78423 0.0576
3 Header-Male-2.54_1x4 H1 HDR-TH_4P-P2.54-V 1 210S-1*4P L=11.6MMGold-plated black Ckmtw LCSC C124378 0.0286
4 MF-MSMF260-2 U1 F1812 1 MF-MSMF260-2 BOURNS LCSC C89651 0.0413
5 JL127-50802G01 U2 CONN-TH_2P-P5.08_JL127-50802G01 1 JL127-50802G01 JILN LCSC C409161 0.1174
6 U-G-04WS-W-03 COPY USB2 USB-A-SMD_U-G-04WS-W-03 COPY 1 U-G-04WS-W-03 韩国韩荣 LCSC C283548 0.1182


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