Input low cut and high cut in LNK6666E
Posted by: Imprdeep
on
Hi,
i made a 10w circuit using lnk6666e and its working fine except one thing if i use feedback resistor 39k than input lower cut off is 60V and higher cutoff is 290v and if i use 68k than AC low cutoff is 120V but high cut is not working. i want to set lower cut at 120 and higher cut at 285VAC is it possible to do it because changing resistor isnt working?
Hi,
Only the undervoltage turn-on threshold is selectable.
Overvoltage turn-off will be positioned according to the undervoltage turn-on threshold.
For more information see AN-58 - LinkSwitch-HP Design Guide page 8: Line Sense (VUVON, VUVOFF).