SWITCH MODE POWER CONVERTERS USING MAGNETICALLY COUPLED GALVANICALLY ISOLATED LEAD FRAME COMMUNICATION

摘要

An integrated circuit package for use in a switch mode power converter includes a portion of a lead frame disposed within an encapsulation. The lead frame includes a first conductor having an inner conductive loop disposed within the encapsulation, and a second conductor galvanically isolated from the first conductor having an outer conductive loop disposed within the encapsulation and magnetically coupled to the first conductive loop to provide a communication link between the first and second conductors. First and second control circuits are coupled to the first and second conductors, respectively. The first control circuit is coupled to control a switching circuit in response to one or more control signals communicated between first and second dice that include the first and second control circuits, respectively, through the communication link to regulate a transfer of energy from an input to an output of the switch mode power converter.

主权项

1. An integrated circuit package for use in a switch mode power converter, comprising:
an encapsulation; a lead frame, a portion of the lead frame disposed within the encapsulation, the lead frame including a first conductor having an inner conductive loop disposed substantially within the encapsulation, wherein the lead frame further includes a second conductor galvanically isolated from the first conductor, wherein the second conductor includes an outer conductive loop disposed substantially within the encapsulation and magnetically coupled to the first conductive loop to provide a communication link between the first and second conductors; a first control die including a first control circuit coupled to the first conductor; and a second control die including a second control circuit coupled to the second conductor, wherein one or more control signals are communicated between the first and second control dice through the communication link, wherein the switch mode power converter comprises a switching circuit coupled between an input of the power converter and an input of an energy transfer element, the output of the energy transfer element coupled to an output of the switch mode power converter, wherein the first control circuit coupled to the switching circuit to control switching of the switching circuit in response to the one or more control signals communicated between the first and second control dice through the communication link to regulate a transfer of energy from the input of the switch mode power converter to the output of the switch mode power converter.