The pulse-edge transformer (PET) is used as a medium to transmit PWM pulses from a secondary-side controller, such as EZ-PD™ PAGxS, to a primary-side controller, such as EZ-PD™ PAGxP, for AC/DC applications targeting the power adapter segment.

This article explains the advantages of PET over the conventional opto-coupler based approach.

Click here to read more.

Source: https://semiengineering.com/usage-of-pulse-edge-transformer-in-secondary-controlled-flyback-applications/