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USB Charger

USB Charger Assembly

I created this USB Power supply to try out one of the reference designs in the RT8288AZSP SMPS. It was also an opportunity for me to try SMD reflow soldering with a stencil and hot plate.

Solder Paste Stencil

The Solder Paste Stencil came from OSH Stencils.  It was pretty easy to use, but the blue tape didn’t really hold it tight against the board so i got a bit of solder paste bleeding outside the pad boundary.

Reflowing on my Mother’s hotplate

 
Almost all parts have reflowed
The SMD soldering was perfect.  The only problem turned out to be the through holes for the USB-A jack.  Somehow I ended up with the drill diameter set too low.  After some careful work with a flush mount side cutter and soldering Iron I turned the through hole jack into a surface mount one and managed to make contact with the board.
Completed board with through hole jacks installed

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