BackpowerAdapterRevB

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STD BackpowerAdapterRevB

Power

License: CC-BY 3.0

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Cloned from BackpowerAdapterRevA

Update time： 2021-08-03 17:12:58

Creation time： 2021-06-15 09:59:46

Description

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.

Design Drawing

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BOM

BOM download Purchase Parts

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