公开(公告)号：EP2876521B1

公开(公告)日：2016-05-25

申请号：EP13194406.8

申请日：2013-11-26

申请人： Dialog Semiconductor GmbH

发明人： Bhattad, Ambreesh ,  Kronmüller, Frank

IPC分类号： G05F1/56 ,  H02H9/00

CPC分类号： G05F1/56 ,  G05F1/562 ,  G05F1/569 ,  G05F1/573 ,  G05F1/5735 ,  H02H9/001 ,  H02M1/36

摘要： A circuit is provided with inrush current protection through control of the output current at start-up by a current source that does not rely on the output capacitor and which provides a smooth transition from a controlled current mode during a start-up phase to a voltage regulation mode.

摘要翻译： 通过控制启动时的输出电流，不依赖于输出电容的电流源，并且在启动阶段向电压提供从受控电流模式的平滑过渡，从而为电路提供浪涌电流保护 调节模式。

公开(公告)号：EP3075047A1

公开(公告)日：2016-10-05

申请号：EP14866163.0

申请日：2014-11-07

申请人： Powerbyproxi Limited

发明人： DELA CRUZ, Lawrence Bernardo ,  HUANG, Rex Pius

IPC分类号： H02H3/08 ,  H02H3/00 ,  H03K17/082 ,  H02H1/00

CPC分类号： H03K17/0826 ,  G05F1/5735 ,  H02H3/08 ,  H02H3/087 ,  H02H9/02 ,  H03K2217/0027

摘要： An overcurrent protection circuit for use in a power supply system to control switching on of the circuit. The circuit is connected between a voltage source and a load. A current sensing resistor senses the current flowing to the load and a pair of thermally coupled transistor switches detect a predetermined voltage drop across the current sensing resistor when the current in the current sensing resistor exceeds a first threshold. A control switch limits the power delivered to the load from the voltage source when the pair of transistor switches detecting the predetermined voltage drop.

摘要翻译： 过电流保护电路，用于电源系统控制电路的接通。 该电路连接在电压源和负载之间。 当电流感测电阻器中的电流超过第一阈值时，电流感测电阻器感测流向负载的电流，并且一对热耦合的晶体管开关检测电流感测电阻器上的预定电压降。 当一对晶体管开关检测到预定电压降时，控制开关限制从电压源向负载输送的功率。

公开(公告)号：EP1109088A1

公开(公告)日：2001-06-20

申请号：EP00403489.8

申请日：2000-12-12

申请人： STMicroelectronics SA

发明人： Renous, Claude

IPC分类号： G05F1/565

CPC分类号： G05F1/565 ,  G05F1/5735 ,  Y10S323/908

摘要： L'invention concerne un régulateur de tension à limiteur de courant comprenant :

une partie régulatrice de tension constituée d'un circuit amplificateur et d'un circuit de réaction, le circuit amplificateur comprenant un transistor ballast (T1), le circuit de réaction fournissant une tension de réaction au circuit amplificateur qui fonctionne par comparaison avec une tension de référence (Vref),
une partie limiteur de courant comprenant un transistor (T7) disposé en série entre le transistor ballast (T1) et la sortie du régulateur, un circuit de réaction fournissant une tension de réaction à des moyens de commande du transistor limiteur de courant, les moyens de commande faisant fonctionner le transistor limiteur de courant (T7) entre un régime de saturation et un régime de blocage selon que la tension de réaction représentative de la sortie est au-dessus ou au-dessous d'une tension de seuil prédéterminée.

摘要翻译： 该电路具有一个带有反馈电路的调节区，该反馈电路通过将输出电压与参考电压（Vref）进行比较来控制串联镇流器晶体管（T1）。 该电路还具有限流区，镇流器晶体管与功率输出之间具有串联晶体管（T7）。 如果输出电压下降太远，则检测器电路使晶体管（T7）工作在阻塞模式。

公开(公告)号：EP0994401A2

公开(公告)日：2000-04-19

申请号：EP99120266.4

申请日：1999-10-11

申请人： SHARP KABUSHIKI KAISHA

发明人： Warita, Hirohisa ,  Nakajima, Akio

IPC分类号： G05F1/573

CPC分类号： G05F1/573 ,  G05F1/5735

摘要： A current detection resistance such as a metal resistance is formed in series with a power transistor, and in response to an output voltage of the current detection resistance, an overcurrent protective circuit performs an overcurrent suppressing operation with high accuracy without being affected by irregularity of a current multiplication factor, etc.; thus, it is possible to realize a smaller chip area so as to reduce the cost. Furthermore, a short-circuit protective circuit returns a terminal voltage of a referenced resistance, that appears in accordance with a partial pressure value of an output voltage, at the transistor, a partial pressure resistance, and a current mirror circuit. And the short-circuit protective circuit controls a potential of a base resistance and suppresses a base current. Hence, it is not necessary to dispose the transistor for suppressing a current between base lines, so that a low-voltage operation can be realized. In a direct-current stabilization power supply device having a two-chip structure of a PNP power transistor and a control IC, it is possible to achieve a smaller chip area and a low-voltage operation.

摘要翻译： 与功率晶体管串联地形成诸如金属电阻的电流检测电阻，并且响应于电流检测电阻的输出电压，过电流保护电路以高精度执行过电流抑制操作，而不会受到不规则性的影响 当前倍增因子等; 因此，可以实现更小的芯片面积，从而降低成本。 此外，短路保护电路返回根据晶体管，分压电阻和电流镜电路的输出电压的分压出现的参考电阻的端子电压。 并且短路保护电路控制基极电阻的电位并抑制基极电流。 因此，不需要设置用于抑制基线之间的电流的晶体管，从而可以实现低电压操作。 在具有PNP功率晶体管和控制IC的双芯片结构的直流稳压电源装置中，可以实现较小的芯片面积和低电压工作。

公开(公告)号：EP3403157A1

公开(公告)日：2018-11-21

申请号：EP17701259.8

申请日：2017-01-12

申请人： Raytheon Company

发明人： JACOBSON, Boris, S.

IPC分类号： G05F1/573 ,  H02M1/32

CPC分类号： H02M7/217 ,  G05F1/5735 ,  H02M1/32 ,  H02M2001/0009

摘要： A power converter system configured to supply DC power to a load is provided, comprising a power converter device responsive to an AC input voltage and configured to provide an output DC voltage; an output voltage loop controller in operable communication with the power converter; an output current loop controller in operable communication with the power converter; an output power loop controller in operable communication with the power converter; and a foldback controller in operable communication with the power converter. The output voltage loop controller, the output current loop controller, the output power loop controller, and the foldback controller together control the power converter to provide a multi-sloped output characteristic, including constant output voltage in voltage mode, increased output current in a first constant power mode, decreased output current and voltage in a foldback mode, and increasing output current and decreasing output voltage in a second constant power mode.

公开(公告)号：EP3242365A1

公开(公告)日：2017-11-08

申请号：EP15878381.1

申请日：2015-01-22

申请人： Huawei Technologies Co., Ltd.

发明人： LIU, Shengcai

IPC分类号： H02H3/08

CPC分类号： H02H9/02 ,  G05F1/5735

摘要： A current-limiting protection circuit (101) and an electronic device (100) are provided. The current-limiting protection circuit includes: a power supply chip (21) and a current-limiting circuit that is electrically connected to the power supply chip. The current-limiting circuit is configured to: detect a charging current, and output a feedback voltage to the power supply chip. The power supply chip is configured to: when the feedback voltage is greater than a second reference voltage, reduce an output voltage until the charging current reaches a preset value, where the second reference voltage is a preset internal voltage of the power supply chip.

摘要翻译： 提供限流保护电路（101）和电子装置（100）。 限流保护电路包括：电源芯片（21）和电连接于电源芯片的限流电路。 限流电路被配置为：检测充电电流，并向电源芯片输出反馈电压。 电源芯片被配置为：当反馈电压大于第二参考电压时，减小输出电压直到充电电流达到预设值，其中第二参考电压是预设的电源芯片的内部电压。

公开(公告)号：EP2668549A2

公开(公告)日：2013-12-04

申请号：EP12702371.1

申请日：2012-01-20

申请人： Microchip Technology Incorporated

发明人： WILLIAMS, Matthew ,  LEONESCU, Daniel ,  DEARBORN, Scott ,  ALBRECHT, Christian

IPC分类号： G05F1/573

CPC分类号： G05F1/5735

摘要： The regulated output voltage of a voltage regulator is maintained up to a current limit, Ilimit, then as the load impedance continues to decrease the output current does not increase past the current limit, Ilimit, but rather the output voltage decreases forcing the output current to also decrease to satisfy Ohm's Law: IOUT=VOUT/ZLoad. When the output voltage drops below the regulated voltage value because of current limiting the voltage regulator shifts from a current limit mode to a current foldback mode wherein the output current decreases with the decrease in output voltage until the output current reaches a current foldback minimum, Ifoldback, at an output voltage of substantially zero volts. As the load impedance increases so will the output voltage and current until the output voltage is back at substantially the regulation voltage value, and the output current is less than or equal to the current limit, Ilimit.

摘要翻译： 电压调节器的调节输出电压保持在电流限制Ilimit，然后当负载阻抗持续降低时，输出电流不会超过电流限制Ilimit，而是输出电压降低，迫使输出电流 也减少到符合欧姆定律：IOUT = VOUT / ZLoad。 当输出电压由于电流限制而降低到调节电压值以下时，电压调节器从电流限制模式转换到电流折返模式，其中输出电流随着输出电压的降低而减小，直到输出电流达到当前折返最小值Ifoldback ，输出电压基本为零伏特。 随着负载阻抗的增加，输出电压和电流直到输出电压恢复到基本上的调节电压值，并且输出电流小于或等于电流限制Ilimit。

公开(公告)号：EP2060059A2

公开(公告)日：2009-05-20

申请号：EP07811698.5

申请日：2007-09-07

申请人： Linear Technology Corporation

发明人： HEATH, Jeffrey, Lynn

IPC分类号： H04L12/10 ,  H03K3/00 ,  G05F1/573 ,  G06F1/26

CPC分类号： H04L12/10 ,  G05F1/5735

摘要： System and methodology for supplying power to a load using a pass device for connecting the load. A current limit circuit prevents current supplied to the load from exceeding a current, threshold. A foldback circuit modifies the current threshold in accordance with a prescribed condition. The foldback circuit is configured to vary the current threshold in accordance with an approximate safe operating area of the pass device.

公开(公告)号：EP3242365A4

公开(公告)日：2018-01-24

申请号：EP15878381

申请日：2015-01-22

申请人： HUAWEI TECH CO LTD

发明人： LIU SHENGCAI

IPC分类号： H02H3/08 ,  G05F1/573 ,  H02H9/02

CPC分类号： H02H9/02 ,  G05F1/5735

摘要： A current-limiting protection circuit (101) and an electronic device (100) are provided. The current-limiting protection circuit includes: a power supply chip (21) and a current-limiting circuit that is electrically connected to the power supply chip. The current-limiting circuit is configured to: detect a charging current, and output a feedback voltage to the power supply chip. The power supply chip is configured to: when the feedback voltage is greater than a second reference voltage, reduce an output voltage until the charging current reaches a preset value, where the second reference voltage is a preset internal voltage of the power supply chip.

公开(公告)号：EP3005012A4

公开(公告)日：2017-02-22

申请号：EP14804381

申请日：2014-05-28

申请人： TEXAS INSTRUMENTS INC

发明人： TORRES HECTOR ,  PARKHURST CHARLES

IPC分类号： G05F1/10 ,  G05F1/56 ,  G05F1/573 ,  G05F1/575 ,  H02H9/00 ,  H02H9/02

CPC分类号： H02H9/02 ,  G05F1/5735 ,  G05F1/575 ,  H02H9/001

摘要： Apparatus disclosed herein implement a fast transient precision current limiter such as may be included in an electronic voltage regulator. The current limiter includes two current sense element/current clamp control loops. A fast response time control loop first engages and clamps a current spike. A precision control loop then engages to more accurately clamp the output current to a programmed set point. The precision clamping loop includes an inner loop to linearize the precision current sense element. The inner loop forces the drain-to-source voltage (VDS) of the precision sense element to track the VDS of the regulator pass element. A more precise clamping operation results. Overall speed is not sacrificed as the fast response time clamping loop operates in parallel to protect circuitry while the precision clamping loop engages.

摘要翻译： 本文公开的装置实现快速瞬态精密限流器，例如可以包括在电子电压调节器中。 电流限制器包括两个电流检测元件/电流钳位控制回路。 快速响应时间控制回路首先接合并夹紧电流尖峰。 然后，精密控制回路接合以更精确地将输出电流钳位到编程的设定点。 精密钳位回路包括一个线圈化精密电流检测元件的内环。 内部环路迫使精密检测元件的漏极 - 源极电压（VDS）跟踪调节器通过元件的VDS。 更精确的夹紧操作结果。 总体速度不会因为快速响应时间钳位回路并联运行而保护电路而精确夹紧回路啮合。