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公开(公告)号：US10013008B2
公开(公告)日：2018-07-03
申请号：US15117513
申请日：2014-12-19
Applicant: Robert Bosch GmbH
Inventor： Holger Sievert , Stefan Butzmann
CPC classification number: G05F1/573 , G01R15/146 , G01R19/0092
Abstract: The invention relates to the evaluation of a variable of an electric current in a power path by evaluating another electric current in a measuring path. To avoid excessively large electric currents in the measuring path, the current in said path is limited to a predetermined maximum limit value.
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公开(公告)号：US20180017983A1
公开(公告)日：2018-01-18
申请号：US15675872
申请日：2017-08-14
Applicant: STMicroelectronics (Shenzhen) R&D Co. Ltd
Inventor： Ni Zeng
IPC: G05F1/573
CPC classification number: G05F1/573
Abstract: A current limiting circuit includes a current sensing module that is configured to sense an output current of a power transistor and to generate a corresponding sensing current which is proportional to the output current. A first current limiting module coupled to the current sensing module is configured to generate a first limiting current based on the sensing current when a variation of the output current of the power transistor exceeds a first current level. A second current limiting module coupled to the current sensing module is configured to generate a second limiting current based on the sensing current when a variation of the output current of the power transistor exceeds a second current level. A converting module coupled to the first and second current limiting modules and the power transistor controls a gate voltage of the power transistor based at least on the first and second limiting currents.
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公开(公告)号：US20170359059A1
公开(公告)日：2017-12-14
申请号：US15181841
申请日：2016-06-14
Applicant: MACOM Technology Solutions Holdings, Inc.
Inventor： Cristiano Bazzani , Damian McCann
IPC: H03K17/16 , H01L29/20 , H03K5/24 , H01L29/778
CPC classification number: H03K17/165 , G05F1/573 , H01L29/2003 , H01L29/7787 , H02H3/08 , H02H9/02 , H03F1/223 , H03F1/52 , H03F3/2171 , H03F3/72 , H03F2200/462 , H03F2200/78 , H03K5/2472 , H03K17/0828
Abstract: Circuits for protecting devices, such as gallium nitride (GaN) devices, and operating methods thereof are described. The circuits monitor a magnitude of the current in a device and reduce the magnitude of the current and/or shut down the device responsive to the magnitude of the current exceeding a threshold. These circuits safeguard devices from damaging operating conditions to prolong the operating life of the protected devices.
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公开(公告)号：US09645593B2
公开(公告)日：2017-05-09
申请号：US14968002
申请日：2015-12-14
Applicant: Seiko Instruments Inc.
Inventor： Toshiyuki Tsuzaki
Abstract: Provided is a voltage regulator in which an output current can be controlled stably and accurately to an overcurrent protection set value without the need of providing a phase compensation circuit including an element having a large area. The voltage regulator includes a constant voltage control circuit including: a first differential amplifier circuit for comparing a first reference voltage and a feedback voltage to each other; and an output transistor to be controlled by an output voltage of the first differential amplifier circuit, and an overcurrent protective circuit including: a resistor for measuring the output current; a second differential amplifier circuit for measuring a difference between voltages at both terminals of the resistor; a comparator for comparing an output voltage of the second differential amplifier circuit and a second reference voltage to each other; and a switch to be controlled by a detection signal of the comparator. When the output current equal to or larger than an overcurrent protection set value flows, the output voltage of the second differential amplifier circuit is input to the first differential amplifier circuit via the switch, to thereby switch control of the output transistor from control based on the constant voltage control circuit to control based on the overcurrent protective circuit.
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公开(公告)号：US09323262B2
公开(公告)日：2016-04-26
申请号：US14599158
申请日：2015-01-16
Applicant: Seiko Instruments Inc.
Inventor： Tsutomu Tomioka
Abstract: Provided is a voltage regulator capable of preventing breakdown of a gate of an input transistor even when an overshoot occurs at an output terminal. The voltage regulator includes a diode, which is provided to an input transistor to which a divided voltage of an error amplifier circuit is input. The diode includes a cathode connected to a source of the input transistor and an anode connected to a gate thereof.
Abstract translation: 提供了即使在输出端子发生过冲时也能够防止输入晶体管的栅极的击穿的电压调节器。 电压调节器包括二极管，该二极管被提供给输入晶体管，误差放大器电路的分压被输入到该输入晶体管。 二极管包括连接到输入晶体管的源极的阴极和连接到其栅极的阳极。
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Patent Agency Ranking
公开(公告)号：US09304152B2
公开(公告)日：2016-04-05
申请号：US14102908
申请日：2013-12-11
Applicant: NXP B.V.
Inventor： Steven Aerts
IPC: G01R31/3187 , G01R19/00 , G05F1/573 , G01R15/08
CPC classification number: G01R19/0092 , G01R15/08 , G05F1/573 , H03K2217/0027
Abstract: A current monitoring circuit is disclosed. The current monitoring circuit includes a main transistor arrangement for connection in series with a load and a set of one or more measurement branches in parallel with the main transistor arrangement. Each measurement branch comprises a series resistor and switch for controlling the connection of the branch into circuit. A gate controller is provided for controlling the switching of the main transistor arrangement and branch switches and a sense amplifier is included for measuring a current through the load based on the current flowing through the main transistor arrangement or a branch.
Abstract translation: 公开了一种电流监视电路。 电流监视电路包括用于与负载串联连接的主晶体管布置和与主晶体管布置并联的一组或多个测量分支。 每个测量分支包括用于控制分支到电路的连接的串联电阻器和开关。 提供了一种用于控制主晶体管布置和分支开关的切换的门控制器，并且包括读出放大器，用于基于流过主晶体管布置或分支的电流来测量通过负载的电流。
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公开(公告)号：US20160026199A1
公开(公告)日：2016-01-28
申请号：US14776349
申请日：2014-03-14
Applicant: Vidatronic, Inc.
Inventor： Mohamed Ahmed Mohamed El-Nozahi , Mohamed Mostafa Saber Aboudina , Sameh Assem Ibrahim , Faisal Abdellatif Elseddeek Ali Hussien , Moises Emanuel Robinson
IPC: G05F1/575
Abstract: An architecture and method to maintain stability of a low drop-out (LDO)/load switch linear voltage regulator (LVR). The architecture method support optionally determining during a power-up phase and by using a load detection circuit, the estimated load parameters that represents at least one selected from a group consisting of: the load time constant and the load resistor at an output node of the LDO/load switch LVR, and adjusting, based on the estimated output load parameters, an adaptive RC network in the LDO/load switch LVR, wherein the adaptive RC network produces an adaptive zero in a feedback network transfer function of the LDO/load switch LVR, wherein the adaptive zero reduces an effect of a non-dominant pole in the open loop transfer function of the LDO/load switch LVR, and wherein a frequency of the adaptive zero is adjusted based on the estimated load parameters.
Abstract translation: 保持低压降（LDO）/负载开关线性稳压器（LVR）稳定性的架构和方法。 架构方法支持可选地在上电阶段期间确定并且通过使用负载检测电路，所估计的负载参数表示从以下组中选择的至少一个：加载时间常数和负载电阻在输出节点 LDO /负载开关LVR，并且基于估计的输出负载参数来调整LDO /负载开关LVR中的自适应RC网络，其中自适应RC网络在LDO /负载开关的反馈网络传递函数中产生自适应零点 LVR，其中自适应零减少LDO /负载开关LVR的开环传递函数中的非主导极的影响，并且其中基于所估计的负载参数来调整自适应零点的频率。
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公开(公告)号：US20150355661A1
公开(公告)日：2015-12-10
申请号：US14298805
申请日：2014-06-06
Applicant: Electro-Motive Diesel, Inc.
Inventor： James F. WIEMEYER
CPC classification number: G05F3/02 , B61L15/0027 , B61L15/0036 , B61L15/0081 , G05F1/573
Abstract: The present disclosure is directed to a current limiting circuit. The current limiting circuit may include a load, a first switch that controls current supplied to the load, and a first resistive network. The current limiting circuit may further include a voltage divider connected across the first resistive network and including a thermistor. The current limiting circuit may further include a first bipolar junction transistor that controls switching of the first switch. The output terminal of the voltage divider may be connected to a base junction of the first bipolar junction transistor.
Abstract translation: 本公开涉及限流电路。 限流电路可以包括负载，控制提供给负载的电流的第一开关和第一电阻网络。 电流限制电路还可以包括跨越第一电阻网络并且包括热敏电阻器的分压器。 限流电路还可以包括控制第一开关的开关的第一双极结型晶体管。 分压器的输出端子可以连接到第一双极结型晶体管的基极结。
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19.发明申请公开(公告)号：US20150311691A1
公开(公告)日：2015-10-29
申请号：US14693425
申请日：2015-04-22
Applicant: Seiko Instruments Inc.
Inventor： Masakazu SUGIURA
CPC classification number: G05F1/56 , G05F1/573 , H03K17/0822
Abstract: To provide an overcurrent protection circuit which prevents an excessive current from flowing to an output terminal for a long time, and a semiconductor device and a voltage regulator each equipped with the overcurrent protection circuit. An overcurrent protection circuit is configured to include a first transistor which allows a current proportional to an output current flowing through an output transistor to flow, a constant current circuit which allows a reference current to flow, a comparison circuit which compares the current flowing through the first transistor and the reference current, and a control circuit which controls a gate of the output transistor by a signal outputted from the comparison circuit.
Abstract translation: 提供一种能够防止过大的电流长时间流向输出端子的过电流保护电路，以及配备有过电流保护电路的半导体装置和电压调节器。 过电流保护电路被配置为包括第一晶体管，其允许与流过输出晶体管的输出电流成比例的电流流动，允许参考电流流动的恒流电路;比较电路，其比较流过 第一晶体管和参考电流;以及控制电路，其通过从比较电路输出的信号来控制输出晶体管的栅极。
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公开(公告)号：US20150177755A1
公开(公告)日：2015-06-25
申请号：US14415692
申请日：2012-07-19
Applicant: Alexandre Pujol , Mohammed Mansri , Thierry Robin
Inventor： Alexandre Pujol , Mohammed Mansri , Thierry Robin
IPC: G05F1/56
Abstract: The present invention pertains to a linear power regulator device, comprising an internal pass device, a driver device having a driver output arranged to drive the internal pass device via the driver output, wherein the linear power regulator device comprises an external connection connectable or connected to an external pass device; and wherein the driver device is arranged to drive an external pass device via the driver output and the external connection. The invention also pertains to a corresponding electronic device.
Abstract translation: 本发明涉及一种线性功率调节器装置，其包括内部通过装置，具有驱动器输出的驱动器装置，驱动器输出被布置成经由驱动器输出来驱动内部通过装置，其中线性功率调节器装置包括可连接或连接到 外部传递装置; 并且其中所述驱动器装置被布置成经由所述驱动器输出和所述外部连接来驱动外部通过装置。 本发明还涉及相应的电子设备。
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