SWITCH MODE POWER CONVERTERS USING MAGNETICALLY COUPLED GALVANICALLY ISOLATED LEAD FRAME COMMUNICATION
First Claim
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 a first 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 a second conductive loop disposed substantially within the encapsulation proximate to 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.
1 Assignment
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Accused Products
Abstract
An integrated circuit package for use in a switch mode power converter comprises an encapsulation and a lead frame. A portion of the lead frame is disposed within the encapsulation. The lead frame includes a first conductor having a first conductive loop disposed substantially within the encapsulation. The lead frame also includes a second conductor galvanically isolated from the first conductor. The second conductor includes a second conductive loop disposed substantially within the encapsulation proximate to 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 is coupled to the first conductor. A second control die including a second control circuit is coupled to the second conductor. One or more control signals are communicated between the first and second control dice through the communication link.
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Citations
34 Claims
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1. An integrated circuit package for use in a switch mode power converter, comprising:
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an encapsulation; a lead frame, a portion of the lead frame disposed within the encapsulation, the lead frame including a first conductor having a first 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 a second conductive loop disposed substantially within the encapsulation proximate to 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A switch mode power converter, comprising:
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a switching circuit coupled to an input of an energy transfer element and an input of the switch mode power converter; the energy transfer element coupled between the switching circuit and an output of the switch mode power converter; a control circuit coupled to the switching circuit to control switching of the switching circuit to regulate a transfer of energy from the input of the switch mode power converter to the output of the switch mode power converter; a first conductor including a first conductive loop coupled to the control circuit, wherein the first conductor is included in a lead frame of an integrated circuit package; and a second conductor included in the lead frame of the integrated circuit package and galvanically isolated from the first conductor, wherein the second conductor includes a second conductive loop disposed proximate to and magnetically coupled to the first conductive loop to provide a communication link between the first and second conductors, wherein the control circuit is coupled to switch the switching circuit in response to one or more control signals received from the second conductive loop through the magnetic coupling between the first and second conductive loops. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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Specification