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公开(公告)号：US20160164279A1
公开(公告)日：2016-06-09
申请号：US14564172
申请日：2014-12-09
Applicant: Infineon Technologies AG
Inventor： Michael Asam , Andreas Meiser , Steffen Thiele
IPC: H02H9/02 , G01R19/165 , H03K19/0185
CPC classification number: G01R19/16519 , G01R19/16538 , H02H3/087 , H03K19/018507
Abstract: Circuits, switches with over-current protection and methods for measuring a current are described herein. A circuit configured to provide a current from a supply voltage to a load includes a first transistor, a second transistor, and a detecting circuit. The first transistor has a larger active area than the second transistor. The detecting circuit is configured to detect a current through the second transistor. A same voltage is applied between a control terminal of the first transistor and a first controlled terminal of the first transistor and is applied between a control terminal of the second transistor and a first controlled terminal of the second transistor. The detecting circuit is coupled to the second controlled terminal of the second transistor and is coupled to the supply voltage.
Abstract translation: 这里描述了具有过电流保护的电路，开关和用于测量电流的方法。 配置成将电流从电源电压提供给负载的电路包括第一晶体管，第二晶体管和检测电路。 第一晶体管具有比第二晶体管更大的有源面积。 检测电路被配置为检测通过第二晶体管的电流。 在第一晶体管的控制端子和第一晶体管的第一受控端子之间施加相同的电压，并施加在第二晶体管的控制端子和第二晶体管的第一受控端子之间。 检测电路耦合到第二晶体管的第二受控端并耦合到电源电压。
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公开(公告)号：US11831148B2
公开(公告)日：2023-11-28
申请号：US17465528
申请日：2021-09-02
Applicant: Infineon Technologies AG
Inventor： Michael Asam
Abstract: A method for operating an electronic switch is described hereinafter. According to one exemplary embodiment, the method (for an electronic switch in the switched on state) comprises detecting whether there is an undervoltage condition at a supply voltage node and providing an undervoltage signal which indicates an undervoltage condition. The method further comprises switching off the electronic switch if the undervoltage signal indicates an undervoltage condition and switching (back) on the electronic switch if the undervoltage signal no longer indicates an undervoltage condition. If the undervoltage signal indicates an undervoltage condition during a switch-on process of the electronic switch, the electronic switch is switched off again and switching back on is prevented for a defined period of time, irrespective of the undervoltage signal. Moreover, a corresponding circuit is described.
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公开(公告)号：US11527881B2
公开(公告)日：2022-12-13
申请号：US17387253
申请日：2021-07-28
Applicant: Infineon Technologies AG
Inventor： Mirko Bernardoni , Michael Asam , Christian Djelassi-Tscheck , Robert Illing , Martin Ringswirth , Mario Tripolt
IPC: H02H3/08 , G01R19/00 , G01R19/165
Abstract: A circuit includes a monitor circuit. The monitor circuit includes a nonlinear functional unit configured to receive a current sense signal and to generate a power signal representing the power of the current sense signal. The circuit further includes a first filter configured to receive the power signal and to generate a first filtered signal and a second filter configured to receive an input signal that depends on the current sense signal and to generate a second filtered signal. A comparator circuit is configured to receive the first filtered signal and the second filtered signal and to compare the first filtered signal with a first threshold value and the second filtered signal with a second threshold value. The protection signal is indicative of whether the first filtered signal exceeds the first threshold value or the second filtered signal exceeds the second threshold value.
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公开(公告)号：US11346881B1
公开(公告)日：2022-05-31
申请号：US17183084
申请日：2021-02-23
Applicant: Infineon Technologies AG
Inventor： Denis Bilstein , Michael Asam
IPC: G01R31/00 , G01R31/26 , G01R19/165 , G01R31/327 , G01R31/319 , G01R31/28 , G01R31/30 , G01R35/00
Abstract: In some examples, a device includes a control circuit configured to deliver driving signals to a switch. The device also includes a testing circuit configured to cause the control circuit to toggle the switch at a first instance and determine a parameter magnitude at the switch at a second instance after toggling the switch at the first instance by at least determining a voltage magnitude at the switch at the second instance. The testing circuit is also configured to cause the control circuit to toggle the switch after the second instance and determine a parameter magnitude at the switch at a third instance after toggling the switch after the second instance. The testing circuit is further configured to generate an output based on the determined parameter magnitudes at the switch at the second and third instances.
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公开(公告)号：US20220140594A1
公开(公告)日：2022-05-05
申请号：US17451414
申请日：2021-10-19
Applicant: Infineon Technologies AG
Inventor： Michael Asam , Mirko Bernardoni , David Jacquinod , Louis Janinet , Andre Mourrier
Abstract: According to an embodiment, a current monitoring circuit includes a signal shaping unit configured to receive a current sense signal and provide a modified current signal; a filter configured to receive the modified current signal and to provide a respective filtered signal; a comparator configured to receive the filtered signal and a threshold value and to indicate when the filtered signal exceeds the threshold value. The signal shaping unit is configured to calculate a level of the modified current signal from a corresponding level of the current sense signal in accordance with non-linear function.
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Patent Agency Ranking
公开(公告)号：US10559952B2
公开(公告)日：2020-02-11
申请号：US15675097
申请日：2017-08-11
Applicant: Infineon Technologies AG
Inventor： Michael Asam , Alfons Graf
Abstract: A line protection device includes terminals to connect the line protection device in series with an electric line. A current sensor of the line protection device senses a value of electric current through the electric line. A digital filter circuit of the line protection device performs digital filtering of the value of electric current. Depending on the digitally filtered value of the electric current, a switch control circuit of the line protection device controls a switch to interrupt flow of the electric current through the line.
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公开(公告)号：US10554039B2
公开(公告)日：2020-02-04
申请号：US15675107
申请日：2017-08-11
Applicant: Infineon Technologies AG
Inventor： Michael Asam
Abstract: A line protection device includes a current sensor, a digital filter circuit, a switch control circuit, and a non-volatile memory circuit. The current sensor is adapted to a sense a value of electric current through the electric line. The digital filter circuit is adapted to perform digital filtering of the value of electric current. The switch control circuit is adapted to control a switch to interrupt flow of the electric current through the electric line depending on the digitally filtered value of the electric current. The non-volatile memory circuit is adapted to store a state of the digital filter circuit.
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公开(公告)号：US20190052076A1
公开(公告)日：2019-02-14
申请号：US15675107
申请日：2017-08-11
Applicant: Infineon Technologies AG
Inventor： Michael Asam
CPC classification number: H02H7/263 , G01R19/0092 , G01R19/16571 , G01R31/021 , G01R31/085 , G01R31/086 , H02G15/10 , H02H1/04 , H02H3/044 , H02H3/08 , H02H7/226 , H04B3/46
Abstract: A line protection device includes a current sensor, a digital filter circuit, a switch control circuit, and a non-volatile memory circuit. The current sensor is adapted to a sense a value of electric current through the electric line. The digital filter circuit is adapted to perform digital filtering of the value of electric current. The switch control circuit is adapted to control a switch to interrupt flow of the electric current through the electric line depending on the digitally filtered value of the electric current. The non-volatile memory circuit is adapted to store a state of the digital filter circuit.
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公开(公告)号：US20180226963A1
公开(公告)日：2018-08-09
申请号：US15425599
申请日：2017-02-06
Applicant: Infineon Technologies AG
Inventor： Michael Asam , Carmelo Giunta
IPC: H03K17/06 , H03K17/284
CPC classification number: H03K17/063 , H03K17/165 , H03K2217/0027
Abstract: A power switch device includes a switch which is configured to switch a load signal between an on state and an off state. A first terminal and a second terminal of the power switch device are configured to provide a supply voltage to the power switch device. The second terminal is further configured to provide a control signal to the power switch device. The control signal is generated by disconnecting the second terminal from an external voltage source. A storage circuit of the power switch device is configured to capacitively store a status of the supply voltage. A control circuit of the power switch device is configured to control operation of the power switch device depending on the stored status of the supply voltage.
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公开(公告)号：US20220166422A1
公开(公告)日：2022-05-26
申请号：US17455131
申请日：2021-11-16
Applicant: Infineon Technologies AG
Inventor： Christian Djelassi-Tscheck , Michael Asam , Mirko Bernardoni , David Jacquinod , Andre Mourrier , Mario Tripolt
IPC: H03K17/082 , H03K17/0814
Abstract: In accordance with an embodiment, a circuit for driving an electronic switch includes a control circuit configured to trigger a switch-on and a switch-off of the electronic switch in accordance with an input signal, wherein the control circuit is further configured to trigger the switch-off of the electronic switch in response to an under-voltage signal signaling an under-voltage state; and an under-voltage detection circuit configured to signal the under-voltage state when a supply voltage received at a supply node is below an under-voltage threshold value, wherein the under-voltage threshold value depends on a load current passing through the electronic switch.
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