August 1, 2020
Power Integrations INN2605K - ACDC without optocoupler : weekend die-shot
INN2605K is molded in fairly complex surface-mount package. FluxLink (internal magnetic feedback) seems to be made using leadframe & bondwires.Primary side die:
![](https://s.zeptobars.com/INN2605K-large-die.jpg)
Secondary side die:
![](https://s.zeptobars.com/INN2605K-small-die.jpg)
FluxLink seems to be using right side of the leadframe, some bondwires are now missing:
![](https://s.zeptobars.com/INN2605K-assembly.jpg?2)