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Last time I looked at it it was not especially cost effective to build PC power supplies on multilayer boards. That leads to exactly the kind of construction as
by dfox 5y ago
Last time I looked at it it was not especially cost effective to build PC power supplies on multilayer boards. That leads to exactly the kind of construction as in this power supply: large almost completely through hole single-sided board with power components and one or more higher density perpendicular sub-boards with control logic.
- londons_explore 5y ago2 layer boards with smd components are now cheaper than single layer and through hole - simply because through hole requires more labour to place components and has a substantially higher failure rate (bad joints). Obviously some components in a power supply still need to be through hole for mechanical reasons, but it isn't many.
- dfox 5y agoIt is not that clear-cut. Obviously the optimal case is SMD-only, but there is a threshold when THT-only becomes cheaper than SMD/THT mix. Another thing is that power supplies tend to use higher temperature board material (presumably to allow for thinner copper plating) which is somewhat rare and expensive in dual layer configurations.