Patent attributes
A switched mode power converter (SMPC) has an isolation transformer for power transfer and a communication circuit for data communication between the primary side and the secondary side. The SMPC includes a primary switch controller configured to transfer power from a primary side to a secondary side by controlling a primary switch ON for an ON time period and then controlling the primary switch OFF for an OFF time period. The primary switch controller controls the ON time period of the subsequent power transfer cycle to start a time delay after the end of the OFF time period of the previous power transfer cycle. The communication circuit comprises a magnetically coupled transmission winding and reception winding, a communication switch, and a communication controller to control the communication switch to allow charge flow through the transmission winding during at least part of the time delay for data communication.
