LNK409 and LNK419

1 post / 0 new

In open-loop condition, output voltage is different by LNK409 and LNK419.
(LNK409:405V, LNK419:455V)
Does it have internal circuit the difference?

In open-loop condition, in order to reduce the output voltage to 400V,
I'm using a zener diode of low Vz.
However, it does not work correctly at input voltage AC200V.

To reduce the output voltage, other measures are available?

Please give me a good idea.

best regards.