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,wherein the switch mode power converter comprises a switching circuit coupled between an input of the power supply 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 the transfer of energy from the input of the switch mode power converter to the output of the switch mode power converter.
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.
61 Citations
32 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, wherein the switch mode power converter comprises a switching circuit coupled between an input of the power supply 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 the transfer of energy from the input of the switch mode power converter to the output of the switch mode power converter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. 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, wherein the first and second conductive loops are coupled to respective external pin pads of the integrated circuit package. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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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; 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; an isolated synchronous flyback converter, wherein the control circuit is a primary control circuit, and wherein the switch mode power converter further comprises; a second switch coupled to an output of the energy transfer element and the output of the switch mode power converter; and a secondary control circuit coupled to receive a feedback signal representative of the output of the switch mode power converter, wherein the secondary control circuit is further coupled to the second switch to control switching of the second switch to transfer energy from the energy transfer element to the output of the power supply, wherein the secondary control circuit is coupled to the second conductor to transmit the one or more control signals in response to the feedback signal, through the magnetic coupling between the first and second conductive loops to the primary control circuit.
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19. 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; 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; and an isolated flyback converter, wherein the control circuit is a primary control circuit, and wherein the switch mode power converter further comprises a secondary control circuit coupled to receive a feedback signal representative of the output of the switch mode power converter, wherein the one or more control signals is responsive to the feedback signal, and wherein the secondary control circuit is coupled to the second conductor to transmit the one or more control signals through the magnetic coupling between the first and second conductive loops to the primary control circuit. - View Dependent Claims (20)
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Specification