A flyback converter with secondary side control and synchronous rectifier (SR) architecture and method for operating the same are provided. Generally, the secondary side controller includes an integrated circuit (IC) including a single SR-SNS pin coupled to a drain of a SR on a secondary side of the converter to sense a voltage on the drain, and a power switch (PS) drive pin coupled to a PS on a primary side to turn on the PS in response to a number of measurements based on the voltage sensed on the drain of the SR. The IC includes a calibration block to measure a loop turn-around delay, valley delays with respect to zero-crossing and set timing for a signal to turn on the PS in response to the voltage sensed on the drain of the SR at or very close the primary side valley improving efficiency and performance of the converter.