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1. 发明申请

US20040174144A1 Synchronous rectifier back bias control circuit 失效
标题翻译：同步整流器背偏控制电路
公开(公告)号：US20040174144A1
公开(公告)日：2004-09-09
申请号：US10378696
申请日：2003-03-03
发明人： Hong Huang , Chris M. Young
IPC分类号： G05F001/613
CPC分类号： H02M3/1588 , H02M1/32 , H02M1/36 , Y02B70/1466 , Y10S323/901
摘要： A circuit is disclosed that efficiently prevents the turning on of the synchronous rectifier in a buck converter during a predetermined condition, so as to prevent current reversing through the synchronous rectifier during that time. In one embodiment, the present invention provides control of the synchronous rectifier during the soft-start time for a non-isolated DC-DC buck converter, thereby preventing current reversing (sinking) during its soft start process. In another embodiment of the present invention, a circuit uses a signal indicative of a soft-start condition for a converter to prevent the turning on of the synchronous rectifier during the soft-start time. The present invention also solves the aforementioned synchronous rectifier back bias problem for converters used in a paralleled converter configuration.
摘要翻译：公开了一种在预定条件下有效地防止降压转换器中的同步整流器导通的电路，以便在此期间防止电流反向通过同步整流器。在一个实施例中，本发明在非隔离DC-DC降压转换器的软启动时间期间提供对同步整流器的控制，从而防止在其软启动过程期间的电流反向（吸收）。在本发明的另一个实施例中，电路使用指示转换器的软启动条件的信号来防止在软启动时间期间同步整流器的导通。本发明还解决了并联转换器配置中使用的转换器的上述同步整流器背偏置问题。

2. 发明申请

US20040000894A1 Multiphase synchronous buck converter with improved power loss balancing 有权
标题翻译：具有改善功率损耗平衡的多相同步降压转换器
公开(公告)号：US20040000894A1
公开(公告)日：2004-01-01
申请号：US10406685
申请日：2003-04-03
申请人： International Rectifier Corporation
发明人： Jason Zhang
IPC分类号： G05F001/613
CPC分类号： H02M3/1584 , H02M3/1588 , Y02B70/1466
摘要： A multi-phase synchronous buck converter having plural single phase synchronous buck converter stages, connected together to provide an output current to a load. A sensing circuit in each converter stage includes a variable gain current sense amplifier that determines the current through the shunt MOSFET to generate an output signal representative of the output current provided by that converter stage. The gains of the current sense amplifiers in each converter stage are preset such that the output signals from all the amplifiers are substantially equal, thereby balancing the power loss in all the converter stages by adjustment of the output currents using varying current sense gains to compensate for variations in the RDS-ON of the shunt MOSFETS.
摘要翻译：一种多相同步降压转换器，具有多个单相同步降压转换器级，连接在一起以向负载提供输出电流。每个转换器级中的感测电路包括可变增益电流检测放大器，其确定通过并联MOSFET的电流以产生表示由该转换器级提供的输出电流的输出信号。每个转换器级中的电流感测放大器的增益被预设为使得来自所有放大器的输出信号基本相等，从而通过使用改变的电流检测增益来调节输出电流来平衡所有转换器级中的功率损耗，以补偿分流MOSFET的RDS-ON变化。

3. 发明申请

US20030210020A1 Synchronous buck converter with improved output current sensing 有权
标题翻译：同步降压转换器，具有改进的输出电流检测
公开(公告)号：US20030210020A1
公开(公告)日：2003-11-13
申请号：US10406683
申请日：2003-04-03
申请人： International Rectifier Corporation
发明人： Jason Zhang
IPC分类号： G05F001/613
CPC分类号： H02M3/1584 , H02M3/1588 , Y02B70/1466
摘要： A synchronous buck converter manufacturable as an MCM having an improved output current sensing circuit. The device employs MOSFETS as the switching transistors, and a sensing circuit including a sampling switch operated synchronously on and off with the shunt MOSFET, a variable gain amplifier, the sampling switch being coupled to provide a signal to the variable gain amplifier representing the voltage across the RDS-ON of the shunt MOSFET, and a circuit, e.g., an RC circuit, associated with the variable gain amplifier implementing a low pass filter whereby the output of the variable gain amplifier is substantially independent of the value of the inductor and the magnitude of any time varying component of the signal input to the sampling switch. When the device is packaged an MCM, the current sense circuit gain can be trimmed based on the RDS-ON value. The current sense gain can also be adjusted according to the module temperature by using temperature sensitive devices inside the IC to eliminate the RDS-ON temperature variation, and according to the gate voltage to eliminate the RDS-ON variation due to gate voltage changes.
摘要翻译：作为具有改进的输出电流感测电路的MCM制造的同步降压转换器。该器件采用MOSFET作为开关晶体管，并且包括采样开关的感测电路，该采样开关与分流MOSFET同步开启和关闭，可变增益放大器，采样开关被耦合以向可变增益放大器提供信号，该信号代表跨越并联MOSFET的RDS-ON以及与可变增益放大器相关联的电路（例如，RC电路），其实现低通滤波器，由此可变增益放大器的输出基本上不依赖于电感器的值和幅度任何时间变化的信号输入到采样开关的分量。当器件封装MCM时，可以根据RDS-ON值对电流检测电路增益进行修整。也可以通过使用IC内部的温度敏感器件，根据模块温度调节电流检测增益，以消除RDS-ON温度变化，并根据栅极电压消除由于栅极电压变化引起的RDS-ON变化。

4. 发明申请

US20030205990A1 Circuits and circuit elements for high efficiency power conversion 失效
标题翻译：用于高效率电源转换的电路和电路元件
公开(公告)号：US20030205990A1
公开(公告)日：2003-11-06
申请号：US10137908
申请日：2002-05-01
发明人： Ernest H. Wittenbreder, JR.
IPC分类号： G05F001/613
CPC分类号： H02M1/34 , H02M3/158 , H02M2001/0064 , H02M2001/342 , Y02B70/1491
摘要： Several novel zero voltage switching (ZVS) cells and a ZVS dc to dc transformer circuit are revealed. A U core transformer structure for use with the dc to dc transformer circuit is also revealed. An optimal gate drive circuit that achieves optimal switch timing for ZVS switches is revealed. The optimal gate drive circuit achieves optimal timing for the case in which there is sufficient energy available to drive a zero voltage transition and also for the case in which there is insufficient energy to drive a zero voltage transition providing turn on current to the switch at the minimum drain voltage of the switch. A magnetically coupled multi-phase converter cell structure is revealed which achieves reduced switch ripple current and fast transient response for multi-phase systems with three or more cells. A ZVS active reset switch drive scheme is revealed for providing zero voltage switching in bi-directional power flow converters for both directions of power flow using a single active reset circuit. A primary switching network that applies only one quarter of the input dc source voltage to a winding network connected to the switching network is revealed. The primary switching network is useful for planar magnetic circuit elements which benefit from lower applied voltages and suffer from windings with high number of turns.
摘要翻译：揭示了几种新型零电压开关（ZVS）单元和ZVS直流 - 直流变压器电路。还揭示了用于直流到直流变压器电路的U型变压器结构。揭示了实现ZVS开关最佳切换时序的最佳门驱动电路。最佳栅极驱动电路可以实现最佳的时序，在这种情况下，存在足够的能量可用于驱动零电压转换的情况，而且在不足的能量下驱动零电压转换的情况也是如此。开关的最小漏极电压。揭示了一种磁耦合多相转换器单元结构，其实现了具有三个或更多个单元的多相系统的开关纹波电流和快速瞬态响应的降低。 ZVS有源复位开关驱动方案被揭示用于使用单个有源复位电路为双向功率流转换器提供零电压开关，用于两个潮流方向。揭示了仅将四分之一输入直流电源施加到连接到交换网络的绕组网络的主交换网络。主开关网络对于受益于较低施加电压且受到具有高匝数的绕组的平面磁路元件而言是有用的。

5. 发明申请

US20030111983A1 Efficient buck topology DC-DC power stage utilizing monolithic N- channel upper FET and pilot current sensing 失效
标题翻译：高效的降压拓扑采用单片N沟道上FET和引导电流检测的DC-DC功率级
公开(公告)号：US20030111983A1
公开(公告)日：2003-06-19
申请号：US10316136
申请日：2002-12-10
发明人： Greg J. Miller , Michael M. Walters
IPC分类号： G05F001/613
CPC分类号： H02M3/1588 , H02M2001/0064 , Y02B70/1466
摘要： A power switching stage architecture for a buck topology-based, DC-DC converter includes an upper power switching N-channel device FET integrated in the same semiconductor circuit chip with the switching driver, while a lower power switching is also an N-channel FET, but is external to the driver chip. Either of the two power switching FETs may be configured to include a pilot FET cell, to facilitate current sensing for the controller.
摘要翻译：用于基于降压拓扑的DC-DC转换器的功率开关级架构包括集成在与开关驱动器相同的半导体电路芯片中的上电功率开关N沟道器件FET，而较低功率开关也是N沟道FET ，但是驱动芯片是外部的。两个功率开关FET中的任一个可以被配置为包括导频FET单元，以便于控制器的电流感测。

6. 发明申请

US20030001547A1 Switching regulator and amplifier utilizing said regulator 审中-公开
标题翻译：利用所述调节器的开关稳压器和放大器
公开(公告)号：US20030001547A1
公开(公告)日：2003-01-02
申请号：US10158402
申请日：2002-05-30
发明人： Dieter Jurzitza
IPC分类号： G05F001/613
CPC分类号： H02M3/1582 , H03F3/217
摘要： A switching regulator includes a supply voltage terminal (IN), a ground terminal (OUT), a ground terminal (OUT), an inductive element (L) in which a first terminal is connectable through a first switch (T1) to a supply voltage terminal (IN), a capacitive element (C) in which a first terminal is connected to a second terminal of the inductive element (L) and a second terminal to the ground terminal (GND), and an output terminal (OUT) for outputting an output voltage, which terminal is connected to the first terminal of the capacitive element (C). A second switch (T4) is arranged in parallel with the capacitive element (C). The switching regulator is suited for constructing an amplifier for an audio signal.
摘要翻译：开关调节器包括电源电压端子（IN），接地端子（OUT），接地端子（OUT），电感元件（L），其中第一端子可通过第一开关（T1）连接到电源电压端子（IN），电容元件（C），其中第一端子连接到电感元件（L）的第二端子，第二端子连接到接地端子（GND）;以及输出端子（OUT），用于输出输出电压，该端子连接到电容元件（C）的第一端子。第二开关（T4）与电容元件（C）并联布置。开关稳压器适用于构成用于音频信号的放大器。

7. 发明申请

US20020140408A1 TECHNIQUE FOR LIMITING CURRENT THROUGH A REACTIVE ELEMENT IN A VOLTAGE CONVERTER 失效
标题翻译：通过电压转换器中的反应元件限制电流的技术
公开(公告)号：US20020140408A1
公开(公告)日：2002-10-03
申请号：US09823836
申请日：2001-03-30
发明人： Jeffrey H. Hwang
IPC分类号： G05F001/613
CPC分类号： H02M3/156 , H02M1/32 , H02M3/1588 , H02M2001/0009 , Y02B70/1466
摘要： A current limiting technique for a voltage converter. Parasitic resistance of an inductor in an input path to the converter is used to determine the level of current input to the converter. If the measured current level is excessive, then switching in the converter may be interrupted until the current falls to an acceptable level. Because parasitic resistance is used to detect the input current, rather than a dedicated sensing resistor, fewer components are required. Thus, implementation of the converter and its associated control circuitry is simplified. A modulated input current passes through an inductor of a voltage converter. An input voltage at a first terminal of the inductor is filtered and compared to an output voltage formed at a second terminal of the inductor. The difference in these values is indicative of a voltage across the parasitic resistor and, thus, is indicative of the input current. When the difference exceeds a predetermined level, the input current may be interrupted until the current in the inductor falls to an acceptable level. Current in one or both directions may be monitored for an excessive level. In addition, hysteresis may be employed so as to cause the current in the inductor to fall to a level that is somewhat below the predetermined level before enabling the input current.
摘要翻译：一种电压转换器的限流技术。使用转换器输入路径中的电感器的寄生电阻来确定输入到转换器的电流电平。如果测量的电流水平过高，则转换器的切换可能会中断，直到电流下降到可接受的水平。由于寄生电阻用于检测输入电流，而不是专用的感测电阻器，因此需要较少的组件。因此，简化了转换器及其相关控制电路的实现。调制输入电流通过电压转换器的电感器。对电感器的第一端子处的输入电压进行滤波，并与形成在电感器的第二端子处的输出电压进行比较。这些值的差异表示寄生电阻两端的电压，因此表示输入电流。当差异超过预定电平时，输入电流可能会中断，直到电感中的电流下降到可接受的水平。一个或两个方向上的电流可以被监视过高的电平。此外，可以采用滞后，以便在使能输入电流之前使电感器中的电流下降到稍低于预定电平的电平。

8. 发明申请

US20020070717A1 Apparatus and methods for boosting power supplied at a remote node 审中-公开
标题翻译：用于提升在远程节点处供电的装置和方法
公开(公告)号：US20020070717A1
公开(公告)日：2002-06-13
申请号：US09731451
申请日：2000-12-07
发明人： John Pellegrino
IPC分类号： G05F001/613
CPC分类号： G05F1/613
摘要： Apparatus and methods for boosting power supplied at a remote node in a distributed power system in response to a feedback signal derived from a measured voltage at a remote node include, in one embodiment, a power system with remote boost regulation employing a variable power supply and a remote active boost regulator working in coordination. The remote active boost regulator monitors the variable power supply output voltage; using an amplifier, compares the measured voltage with a reference voltage; and generates a feedback signal. The feedback signal is delivered to a variable power supply causing the power supply to increase, or boost, output voltage to compensate for distribution losses and remote loading.
摘要翻译：在一个实施例中，响应于从远程节点的测量电压导出的反馈信号，在分布式电力系统中提供远程节点提供的功率的装置和方法包括采用可变电源的远程升压调节的电力系统，远程主动升压调节器协调工作。远程有源升压稳压器监视可变电源输出电压; 使用放大器，将测量的电压与参考电压进行比较; 并产生反馈信号。反馈信号被传送到可变电源，导致电源增加或提升输出电压以补偿分配损耗和远程负载。

9. 发明申请

US20010050545A1 Circuit for synchronous rectification with minimal reverse recovery losses 有权
标题翻译：具有最小反向恢复损耗的同步整流电路
公开(公告)号：US20010050545A1
公开(公告)日：2001-12-13
申请号：US09753599
申请日：2001-01-04
申请人： International Rectifier Corporation
发明人： Ajit Dubhashi , Brian Pelly
IPC分类号： G05F001/613
CPC分类号： G05F1/613
摘要： A circuit for synchronous rectification including two power MOSFET transistor switches in which the bottom switch is a P channel MOSFET, rather than an N channel MOSFET. The circuit of the present invention uses a single channel driver, rather than a dual driver and eliminates the deadtime associated with conventional circuits, thus minimizing reverse recovery losses. In an alternative arrangement, the position of the output filter is switched so that the N channel MOSFET conducts during the freewheeling time and the P channel MOSFET (with a larger RDSON) conducts during the conductor charge cycle.
摘要翻译：一个用于同步整流的电路，包括两个功率MOSFET晶体管开关，其中底部开关是P沟道MOSFET，而不是N沟道MOSFET。本发明的电路使用单通道驱动器而不是双驱动器，并且消除与常规电路相关联的死区时间，从而最小化反向恢复损耗。在替代布置中，输出滤波器的位置被切换，使得N沟道MOSFET在续流时间期间导通，并且在导体充电周期期间P沟道MOSFET（具有较大的RDSON）导通。

10. 发明申请

US20040119448A1 Method and apparatus for electronic power control 有权
标题翻译：电子电源控制方法与装置
公开(公告)号：US20040119448A1
公开(公告)日：2004-06-24
申请号：US10658589
申请日：2003-09-08
发明人： Gregory P. Wiegand , David F. Baretich
IPC分类号： G05F001/613
CPC分类号： H02M1/4208 , G05F1/613 , H02M5/293 , Y02B70/126
摘要： The method of the invention in one aspect involves electronic power control by varying the amplitude of an electrical power supply voltage, independent of frequency, whereby the output frequency will always be the same as the input frequency. An electrical circuit apparatus for accomplishing this function in a preferred embodiment is also disclosed herein. The preferred circuitry of this aspect of the invention uses four solid state switches, such as IGBT's, four diodes, an inductor, input and output filters and novel controlling circuitry. The controller apparatus and methods of the invention may be used to implement all otherwise conventional converter types, buck, boost, and inverting (and duals of these) versions to obtain different regulating characteristics, including galvanic isolation of the output from the input. The inventive methods and devices may be used in power factor correction, voltage and/or current harmonic filtering and neutralization, line and load conditioning, control of power transfer between two power grids, and programmable control of surges, sags, dropouts and most other voltage regulation problems.
摘要翻译：本发明的一个方面涉及通过改变电源电压的幅度而与频率无关的电子功率控制，由此输出频率将始终与输入频率相同。本发明还公开了一种用于在优选实施例中实现该功能的电路装置。本发明该方面的优选电路使用四个固态开关，例如IGBT，四个二极管，电感器，输入和输出滤波器以及新颖的控制电路。本发明的控制器装置和方法可用于实现所有其它常规的转换器类型，降压，升压和反相（以及这些）的版本，以获得不同的调节特性，包括从输入端输出的电流隔离。本发明的方法和装置可以用于功率因数校正，电压和/或电流谐波滤波和中和，线路和负载调节，两个电网之间的功率传输的控制以及浪涌，下垂，掉落和大多数其他电压的可编程控制调节问题。

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