LT3420 transformer phasing

Hi Pavel,

Sorry for late reply. You may have gotten answer separately from one of ADI FAE's. I will post answer here. So LT3420 is used on a flyback topology.  You need to be aware of the location of the transformer start of each windings indicated as dots in the schematic. In a way, please follow the typical schematic in datasheet. Pin 2 of transformer with dot should be to SW pin of LT3420. Correct on the secondary side: Pin 4 of transformer should be to the output diode of flyback or HV Out in your language. Thanks!

Hi Pavel,

Sorry for late reply. You may have gotten answer separately from one of ADI FAE's. I will post answer here. So LT3420 is used on a flyback topology.  You need to be aware of the location of the transformer start of each windings indicated as dots in the schematic. In a way, please follow the typical schematic in datasheet. Pin 2 of transformer with dot should be to SW pin of LT3420. Correct on the secondary side: Pin 4 of transformer should be to the output diode of flyback or HV Out in your language. Thanks!