AC-DC SMPS converter with <0.3W standby consumption and 4200 Vrms Pri-Sec. isolation in a 42 x 42 x 22 mm package!
Let’s face it, most of the time you have that beautiful project in mind, you take Arduino, code it and, snap! You’re stuck with a PC or a bulky power supply. But what if you want to integrate all of that in a small package? This design might be what you’ve been looking for, and it’s tiny (42 x 42 x 22 mm).
This AC-DC 1W Surge protected 5V PSU that you’ll find in the following files is based on a 42M3-2L PCB (42mm x 42mm with M3 standard holes to let you mount multiple boards one on top of the other, with 2 layers of copper).
The main component, in orange, is a Vigortronix AC-DC SMPS converter (the exact PN is VTX-214-001-105), capable of very good performance on a low budget. Everything else is there to stabilize the outgoing current (one 25V 470uF CAP) and to protect the primary side of the SMPS (MOV + FUSE).
Connectors are not designed to be shared between boards nor to have low inductance or high currents passing through them (it’s a 1W PSU, remember), but it should suffice most of the simple projects out there.
Mind the gap between your power consumption and the 1W limit!
For more info, take a look at the schematic and source files (Altium Designer 18).
DOWNLOAD SCHEMATIC & COMPONENTS LIST [PDF]
Attention: source files are not designed to be used in an automated assembly line, there’s no structured BOM nor Pick & place file, this is a DIY assembly project.
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Nadim Conti 