Current sensor
First Claim
1. A current sensor, comprising:
- a lead frame having a plurality of leads;
a first current conductor portion comprising at least two of the plurality of leads;
a substrate having first and second opposing surfaces, the first surface proximate to said first current conductor portion and the second surface distal from said first current conductor portion;
one or more magnetic field transducers disposed on the first surface of said substrate; and
an electromagnetic shield disposed proximate to the one or more magnetic field transducers and between the first surface of the substrate and the first current conductor portion, wherein said electromagnetic shield has at least one feature selected to reduce an eddy current induced in said electromagnetic shield.
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Accused Products
Abstract
An integrated circuit current sensor includes a lead frame having at least two leads coupled to provide a current conductor portion, and a substrate having a first surface in which is disposed one or more magnetic field sensing elements, with the first surface being proximate to the current conductor portion and a second surface distal from the current conductor position. In one particular embodiment, the substrate is disposed having the first surface of the substrate above the current conductor portion and the second surface of the substrate above the first surface. In this particular embodiment, the substrate is oriented upside-down in the integrated circuit in a flip-chap arrangement. The current sensor can also include an electromagnetic shield disposed between the current conductor portion and the magnetic field sensing elements.
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Citations
25 Claims
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1. A current sensor, comprising:
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a lead frame having a plurality of leads; a first current conductor portion comprising at least two of the plurality of leads; a substrate having first and second opposing surfaces, the first surface proximate to said first current conductor portion and the second surface distal from said first current conductor portion; one or more magnetic field transducers disposed on the first surface of said substrate; and an electromagnetic shield disposed proximate to the one or more magnetic field transducers and between the first surface of the substrate and the first current conductor portion, wherein said electromagnetic shield has at least one feature selected to reduce an eddy current induced in said electromagnetic shield. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A current sensor, comprising:
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a lead frame having a plurality of leads; a substrate having first and second opposing surfaces; one or more magnetic field transducers disposed on the first surface of said substrate; and an electromagnetic shield disposed proximate to the one or more magnetic field transducers, wherein said electromagnetic shield has at least one feature selected to reduce an eddy current induced in said electromagnetic shield. - View Dependent Claims (20, 21, 22, 23, 24, 25)
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Specification