AN2173 - APPLICATION NOTE

1 VIPer12-based Power Supply Features and Assembly

5/15

1.2

Assembly

The initial PCBs and power supply assemblies were routed, built, and tested in the lab. An

assembly fits into the case with the attached output wire cable that is connected from the flange

to the end. If a Pollution Degree 1 rating is desired, the assembly should be in a sealed case,

since the cable runs from the secondary (across the transformer) to the primary. Additionally,

the transformer can be smaller if the case is sealed. If a sealed case is not used, then thicker

insulation or triple-insulated wire may be required.

Assembly EMI (EN5502, Class B) measurements are shown in

Figure 4 on page 6.

Figure 2.

PCB Layout

Figure 3.

PCB Component Placement