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:

Secondary side die:

FluxLink seems to be using right side of the leadframe, some bondwires are now missing: