T
treez
Guest
Hi,
1..........If there is an offline 40W flyback SMPS on a PCB which is inside a large rectangular earthed metal enclosure…then should the Flyback PCB (and specifically the flyback switching node), be as near as possible to the earthed metal enclosure walls, or as far as possible from same?
The earthed metal enclosure is not being used for heatsinking of the flyback SMPS components.
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Also,
2......If you have an offline 90W Laptop SMPS in the usual plastic enclosure, with aluminium foil “coated” completely round the inside walls of the plastic enclosure for the purpose of Radiated emissions shielding…..then should this metal foil shield be connected to either....
A…Primary DC Bus ground?
B….Earth?
1..........If there is an offline 40W flyback SMPS on a PCB which is inside a large rectangular earthed metal enclosure…then should the Flyback PCB (and specifically the flyback switching node), be as near as possible to the earthed metal enclosure walls, or as far as possible from same?
The earthed metal enclosure is not being used for heatsinking of the flyback SMPS components.
............................_________________.............................
Also,
2......If you have an offline 90W Laptop SMPS in the usual plastic enclosure, with aluminium foil “coated” completely round the inside walls of the plastic enclosure for the purpose of Radiated emissions shielding…..then should this metal foil shield be connected to either....
A…Primary DC Bus ground?
B….Earth?