We kindly request you to clarify the schematic and transformer secondary pin selection of 7.8W flyback LED Driver using LYT2004D (DER-430).
Since the secondary winding (Dot convention) is reversed, starting pin is connected to GND and terminating pin is connected to output diode.
By selecting the same pin detail we failed to get the regulated output and more over output voltage ramps upto 90VDC in No load condition itself and if we connect LED load the device will blasted out.
But finally we interchange the transformer secondary pin and we got ultimate regulated CC/CV output.
We kindly request you to clarify the schematic or do the neccessary change in the design document.
Thanks and Regards,