Patent ID: 9136765
Filing Date: 2015-09-15
Classification: H02M

Abstract:
1. A power converter controller comprising: a primary controller to be coupled to a power switch of a power converter, wherein the primary controller is coupled to control a state of the power switch during a first mode of operation according to a primary switching pattern defined by the primary controller, and wherein the primary controller is coupled to control the state of the power switch in response to control signals received via a communication link during a second mode of operation; and a secondary controller that is galvanically isolated from the primary controller, wherein the secondary controller is coupled to initiate a transition operation with the primary controller during the first mode of operation, wherein the transition operation transitions the primary controller and the secondary controller from the first mode of operation to the second mode of operation, wherein the secondary controller is coupled to transmit one or more control signals during the transition operation and transmit the control signals to the primary controller via the communication link during the second mode of operation, wherein the secondary controller is coupled to detect switching events of the power switch during the first mode of operation, and wherein the secondary controller is coupled to schedule the transmission of the one or more control signals based on when the switching events are detected, wherein the secondary controller is coupled to detect when the power switch transitions from an ON state to an OFF state, and wherein the secondary controller is coupled to schedule the transmission of the one or more control signals to occur a period of time after the secondary controller detects a transition of the power switch from the ON state to the OFF state.