cupoftea
Advanced Member level 5
Hi,
When you get a consultancy to design a 2kW offline SMPS for you, do you get them to do an identical “template” version of it aswell? The “template” version is exactly the same components, but layed out in “open format”, so that all nodes can be easily probed. Also, the “template” is layed out such that all components can be easily removed and replaced….eg, transformer pins are not soldered in…the transformer is tied in with say fishing line, and the coils simply get terminated to PTHs in the PCB, so that they can be easily removed. Also, all FETs and diodes have there own easily removable heatsink, so they can be removed and replaced easily.
Obviously, the “template” wont be any good for thermal testing, or EMC testing, but would be OK to say replace an obsolete component and check its basically OK at a first inspection.
Any daughter boards are not put in sideways on, but are horizontal, (parallel to the main board) so that components can be easily probed on them….also, the daughter boards are easily remove/replaceable, since they are on PCB platforms, to which they solder just like a surface mount component. (the platform is soldered in to PTH’s on the main board.)
This “template” PSU is needed because any of the components may go obsolete/long-term-nil-stocked, and the consultancy is not likely to be instantly available to manage the replacement of the obsolete components.
So do companies get such PSU “templates” made?
When you get a consultancy to design a 2kW offline SMPS for you, do you get them to do an identical “template” version of it aswell? The “template” version is exactly the same components, but layed out in “open format”, so that all nodes can be easily probed. Also, the “template” is layed out such that all components can be easily removed and replaced….eg, transformer pins are not soldered in…the transformer is tied in with say fishing line, and the coils simply get terminated to PTHs in the PCB, so that they can be easily removed. Also, all FETs and diodes have there own easily removable heatsink, so they can be removed and replaced easily.
Obviously, the “template” wont be any good for thermal testing, or EMC testing, but would be OK to say replace an obsolete component and check its basically OK at a first inspection.
Any daughter boards are not put in sideways on, but are horizontal, (parallel to the main board) so that components can be easily probed on them….also, the daughter boards are easily remove/replaceable, since they are on PCB platforms, to which they solder just like a surface mount component. (the platform is soldered in to PTH’s on the main board.)
This “template” PSU is needed because any of the components may go obsolete/long-term-nil-stocked, and the consultancy is not likely to be instantly available to manage the replacement of the obsolete components.
So do companies get such PSU “templates” made?