Package creepage SO-8C
Posted by: chruge
on
Im designing an application using your LNK302DN. Our normative inspector says, we Need to provide 2.5mm creepage for between 230VAC circuits an low voltage circuits.This holds for PCB material (FR4).
The issue also exists for the LNK302DN which has about 1.9mm in between ist Drain and the low voltage part. Could you please provide the material class incorrespondence to IEC 60355 so I can deliver proofe that LNK302DN is suitable?
PS: I know there is conformal coating and so. My application will be polution degree 2. IEC 60730-1 Table 20.3 states that for 250VAC
- material group III needs 2.5mm,
- group II 1.8mm and
- group I 0.6mm creepage.
If your package falls into II or I, I will not need to bother about coating
Hi,
Creepage distance is measured from primary side to secondary side in a offline power supply design. Here the low voltage circuit refers to secondary side cicuit. Since LNK302DN is used on primary side only, so you do not have to meet same creepage distance as siad above.
However I am giving material group classification here.
LNK302DN belongs to Material group-II.
Regards,
PI-NANO