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1. 发明申请

US20200057120A1 Current sensor having multiple sensitivity ranges 审中-公开
公开(公告)号：US20200057120A1
公开(公告)日：2020-02-20
申请号：US15999448
申请日：2018-08-20
申请人： Allegro MicroSystems, LLC , Commissariat à l'énergie atomique et aux énergies alternatives
发明人： Noémie Belin , Shaun D. Milano , Wade Bussing , Claude Fermon
IPC分类号： G01R33/09
摘要： Systems and methods described herein provide a current sensor based on magnetic field detection having multiple sensor arrangements with multiple, different sensitivity ranges. The outputs of the multiple sensor arrangements can be combined to generate a single output signal. The current sensor can include two or more sensor arrangements, each having one or more magnetic field sensing elements, and configured to sense a magnetic field in different first measurement ranges corresponding to different ranges of currents through the conductor and further configured to generate different magnetic field signals indicative of the sensed magnetic field in the respective measurement range. The current sensor can include a circuit configured to generate an output signal indicative of a combination of the different magnetic field signals that corresponds to the current through the conductor.

2. 发明授权

US10935612B2 Current sensor having multiple sensitivity ranges 有权
公开(公告)号：US10935612B2
公开(公告)日：2021-03-02
申请号：US15999448
申请日：2018-08-20
申请人： Allegro MicroSystems, LLC , Commissariat à l'énergie atomique et aux énergies alternatives
发明人： Noémie Belin , Shaun D. Milano , Wade Bussing , Claude Fermon
IPC分类号： G01R15/20 , G01R19/00 , G01R33/025 , G01R33/09
摘要： Systems and methods described herein provide a current sensor based on magnetic field detection having multiple sensor arrangements with multiple, different sensitivity ranges. The outputs of the multiple sensor arrangements can be combined to generate a single output signal. The current sensor can include two or more sensor arrangements, each having one or more magnetic field sensing elements, and configured to sense a magnetic field in different first measurement ranges corresponding to different ranges of currents through the conductor and further configured to generate different magnetic field signals indicative of the sensed magnetic field in the respective measurement range. The current sensor can include a circuit configured to generate an output signal indicative of a combination of the different magnetic field signals that corresponds to the current through the conductor.

3. 发明授权

US10481181B2 Systems and methods for current sensing 有权
公开(公告)号：US10481181B2
公开(公告)日：2019-11-19
申请号：US15496152
申请日：2017-04-25
申请人： Allegro MicroSystems, LLC
发明人： Wade Bussing , Alexander Latham , Shaun D. Milano , Christian Feucht
IPC分类号： G01R15/20 , H01L23/495 , G01R33/00
摘要： Systems and methods described herein are directed towards differential current sensing a current sensor having two or more magnetic field sensing elements that are oriented to sense a magnetic field generated by a current through an external conductor in the same direction. The current sensor can be positioned such that at least one first magnetic field sensing element is vertically aligned with the external conductor and at least one second magnetic field sensing element is not vertically aligned with the external conductor. The magnetic field sensing elements may be spaced from each to measure a gradient field and can generate a magnetic field signal indicative of a distance between the respective magnetic field sensing element and the current carrying external conductor. A difference between the magnetic field signals can be determined that is indicative of the current through the external conductor.

4. 发明授权

US11567890B2 Determining an action by an electronic device based on voltage at a port of the electronic device 有权
公开(公告)号：US11567890B2
公开(公告)日：2023-01-31
申请号：US16452804
申请日：2019-06-26
申请人： Allegro MicroSystems, LLC
发明人： Wade Bussing , Maxwell McNally
IPC分类号： G06F13/40 , H03K17/687
摘要： In one aspect, an electronic device includes a switching circuit connected to a resistance circuit and ground, the resistance circuit connected to a port and the port configured to be connected in series to an external resistor and a supply voltage. A voltage at the port is a first voltage that is less than the supply voltage if the switching circuit is enabled to be a closed circuit and the voltage at the port is a second voltage that is equal to the supply voltage if the switching circuit is enabled to be an open circuit.

5. 发明申请

US20210223292A1 CURRENT SENSOR INTEGRATED CIRCUITS 有权
公开(公告)号：US20210223292A1
公开(公告)日：2021-07-22
申请号：US16884311
申请日：2020-05-27
申请人： Allegro MicroSystems, LLC
发明人： Shixi Louis Liu , Paul A. David , Shaun D. Milano , Rishikesh Nikam , Alexander Latham , Wade Bussing , Natasha Healey , Georges El Bacha
IPC分类号： G01R15/08 , H01L43/06 , H01L43/04
摘要： A current sensor integrated circuit (IC) includes a unitary lead frame having at least one first lead having a terminal end, at least one second lead having a terminal end, and a paddle having a first surface and a second opposing surface. A semiconductor die is supported by the first surface of the paddle, wherein the at least one first lead is electrically coupled to the semiconductor die and the at least one second lead is electrically isolated from the semiconductor die. The current sensor IC further includes a first mold material configured to enclose the semiconductor die and the paddle and a second mold material configured to enclose at least a portion of the first mold material, wherein the terminal end of the at least one first lead and the terminal end of the at least one second lead are external to the second mold material.

6. 发明授权

US10914765B1 Multi-die integrated current sensor 有权
公开(公告)号：US10914765B1
公开(公告)日：2021-02-09
申请号：US16527636
申请日：2019-07-31
申请人： Allegro MicroSystems, LLC
发明人： Wade Bussing , Alexander Latham
IPC分类号： G01R15/20 , H01L43/02 , H01L43/08 , H01L43/06
摘要： A current sensor can include a lead frame. The lead frame can include a first lead and a second lead, wherein the first and second leads are coupled together at a first junction region of the lead frame, wherein the current sensor is operable to sense a magnetic field generated by a first current passing through the first junction region. The current sensor can further include a first die disposed proximate to the lead frame. The first die can include a first magnetic field sensing element disposed on a surface of the first die, a first circuit coupled to the first magnetic field sensing element for generating a first signal indicative of a first current, and a first node coupled to the first signal. The current sensor can further include a second die disposed proximate to the lead frame. The second die can include a second magnetic field sensing element disposed on a surface of the second die, a second circuit coupled to the second magnetic field sensing element for generating a second signal indicative of the first current passing through the first junction region or indicative of a second current passing through the lead frame and a second node coupled to the second signal.

7. 发明申请

US20220137103A1 DIFFERENTIAL CURRENT SENSOR 有权
公开(公告)号：US20220137103A1
公开(公告)日：2022-05-05
申请号：US17083487
申请日：2020-10-29
申请人： Allegro MicroSystems, LLC
发明人： Robert A. Briano , Wade Bussing , Timothy A. Clark
IPC分类号： G01R19/10 , G01R19/15
摘要： Methods and apparatus for measuring a current difference between at least two current traces in a circuit board. Each wire or trace generates a magnetic field which may then be measured by at least one magnetic field sensing element positioned on an integrated circuit, such as a current sensor integrated circuit or a differential magnetic field sensor integrated circuit. An output disconnect signal may be provided from the current sensor or differential magnetic field sensing integrated circuit to indicate that a current difference above a predetermined threshold exists in the two or more current traces.

8. 发明授权

US10908190B2 Systems and methods for current sensing 有权
公开(公告)号：US10908190B2
公开(公告)日：2021-02-02
申请号：US16587284
申请日：2019-09-30
申请人： Allegro MicroSystems, LLC
发明人： Wade Bussing , Alexander Latham , Shaun D. Milano , Christian Feucht
IPC分类号： G01R15/20
摘要： Systems and methods described herein are directed towards differential current sensing a current sensor having two or more magnetic field sensing elements that are oriented to sense a magnetic field generated by a current through an external conductor in the same direction. The current sensor can be positioned such that at least one first magnetic field sensing element is vertically aligned with the external conductor and at least one second magnetic field sensing element is not vertically aligned with the external conductor. The magnetic field sensing elements may be spaced from each to measure a gradient field and can generate a magnetic field signal indicative of a distance between the respective magnetic field sensing element and the current carrying external conductor. A difference between the magnetic field signals can be determined that is indicative of the current through the external conductor.

9. 发明申请

US20200025804A1 Systems and Methods For Current Sensing 审中-公开
公开(公告)号：US20200025804A1
公开(公告)日：2020-01-23
申请号：US16587284
申请日：2019-09-30
申请人： Allegro MicroSystems, LLC
发明人： Wade Bussing , Alexander Latham , Shaun D. Milano , Christian Feucht
IPC分类号： G01R15/20
摘要： Systems and methods described herein are directed towards differential current sensing a current sensor having two or more magnetic field sensing elements that are oriented to sense a magnetic field generated by a current through an external conductor in the same direction. The current sensor can be positioned such that at least one first magnetic field sensing element is vertically aligned with the external conductor and at least one second magnetic field sensing element is not vertically aligned with the external conductor. The magnetic field sensing elements may be spaced from each to measure a gradient field and can generate a magnetic field signal indicative of a distance between the respective magnetic field sensing element and the current carrying external conductor. A difference between the magnetic field signals can be determined that is indicative of the current through the external conductor.

10. 发明申请

US20180306843A1 Systems and Methods For Current Sensing 审中-公开
公开(公告)号：US20180306843A1
公开(公告)日：2018-10-25
申请号：US15496152
申请日：2017-04-25
申请人： Allegro Microsystems, LLC
发明人： Wade Bussing , Alexander Latham , Shaun D. Milano , Christian Feucht
IPC分类号： G01R15/20
摘要： Systems and methods described herein are directed towards differential current sensing a current sensor having two or more magnetic field sensing elements that are oriented to sense a magnetic field generated by a current through an external conductor in the same direction. The current sensor can be positioned such that at least one first magnetic field sensing element is vertically aligned with the external conductor and at least one second magnetic field sensing element is not vertically aligned with the external conductor. The magnetic field sensing elements may be spaced from each to measure a gradient field and can generate a magnetic field signal indicative of a distance between the respective magnetic field sensing element and the current carrying external conductor. A difference between the magnetic field signals can be determined that is indicative of the current through the external conductor.

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