公开(公告)号：US09923324B2

公开(公告)日：2018-03-20

申请号：US14611193

申请日：2015-01-31

申请人： IXYS Corporation

发明人： Kyoung Wook Seok

IPC分类号： H02M7/00 ,  H02M7/217 ,  H02M7/04 ,  H02M1/00 ,  H01R31/06 ,  H02M1/12 ,  H02M1/44 ,  H02M7/219 ,  H01R13/66

CPC分类号： H01R31/065 ,  H01R13/6675 ,  H02M1/126 ,  H02M1/44 ,  H02M7/219 ,  H02M2007/2195 ,  Y02B70/1408

摘要： An AC Line Filter/Rectifier Module (ACLF/RM) has a metal housing and an outward appearance of a conventional AC line filter, but the ACLF/RM includes circuitry that performs both EMI filtering and line filtering as well as very efficient AC-to-DC rectification. Rectification circuitry within the ACLF/RM rectifies an AC voltage signal received onto AC input module terminals and outputs a rectified version of the AC voltage signal onto DC output module terminals. The rectification circuitry includes at least one low forward voltage rectifier, where the low forward voltage rectifier includes a bipolar transistor and a diode. Inductive components perform both EMI filtering and line filtering as well as current splitting required to drive the bipolar transistors of the low forward voltage rectifiers. Due to the use of the low forward voltage rectifiers, the AC-to-DC conversion is more efficient than would be case were a conventional diode bridge rectifier employed.

公开(公告)号：US09780648B2

公开(公告)日：2017-10-03

申请号：US14474132

申请日：2014-08-30

申请人： IXYS Corporation

发明人： Anatoliy V. Tsyrganovich

IPC分类号： H02M3/156 ,  H02M1/00

CPC分类号： H02M3/156 ,  H02M2001/0009

摘要： A sense resistor is placed in series with an output capacitor of a buck converter. The buck converter operates in a discontinuous mode such that there is a dead time in each switching cycle. A control circuit senses a voltage across the sense resistor and thereby generates a first signal ICS. The control circuit detects an offset voltage in ICS, where the offset voltage is the voltage of ICS during the dead time in a first switching cycle. The control circuit level shifts the entire ICS by the offset voltage, thereby generating a second signal ICLS. ICLS has the same waveform as the waveform of the inductor current. In a second cycle, ICLS is used to determine when to turn off the main switch and when the start of the dead time occurs. ICLS and the offset voltage are used together to determine when to turn the main switch on.

公开(公告)号：US09705417B2

公开(公告)日：2017-07-11

申请号：US14955037

申请日：2015-11-30

申请人： IXYS Corporation

发明人： Anatoliy V. Tsyrganovich ,  Leonid A. Neyman

IPC分类号： H02M7/217 ,  H02M7/219

CPC分类号： H02M7/219 ,  H02M2007/2195 ,  Y02B70/1408

摘要： A rectifier includes a larger Field Effect Transistor (FET1) and a smaller FET (FET2). A sense resistor is in series with FET2's body diode between a cathode terminal and an anode terminal. If the cathode terminal voltage is greater than the voltage on the anode terminal, then body diodes of FETs are reverse biased, the FETs are controlled to be off, and there is no current flow through the rectifier. If, however, the voltage on the anode terminal becomes positive with respect to the cathode terminal, then the body diode of FET2 starts to conduct and there is a voltage drop across the sense resistor. A comparator detects this condition and turns both FETs on. The rectifier is then conductive, so current can flow from the anode terminal, through the larger FET1, and to the cathode terminal, with a small forward voltage drop and without passing across the sense resistor.

公开(公告)号：US09641065B2

公开(公告)日：2017-05-02

申请号：US14732688

申请日：2015-06-06

申请人： IXYS Corporation

发明人： Kyoung Wook Seok

IPC分类号： H02M1/44 ,  H02M1/12 ,  H02M7/217 ,  H02M7/219

CPC分类号： H02M7/219 ,  H01L21/02381 ,  H01L21/02532 ,  H01L21/2254 ,  H01L29/66242 ,  H02M1/126 ,  H02M1/44 ,  H02M2007/2195 ,  H03H7/0115

摘要： An AC line filter module includes AC-to-DC rectification circuitry. The rectification circuitry includes four low forward voltage rectifiers coupled together as two high-side rectifiers and two low-side rectifiers, where each low forward voltage rectifier includes an NPN bipolar transistor and a parallel-connected diode. A current splitting pair of inductors splits a return current so that a portion of the current is supplied to the collector of an NPN bipolar transistor that is on, and so that the remainder of the current is supplied to the base of the transistor that is on. Both low-side rectifiers are driven by these current splitting inductors. A pair of base current return diodes provides base current return paths. Due to the use of NPN bipolar transistors and no PNP bipolar transistors, manufacturing cost is reduced and efficiency is improved as compared to an implementation that uses low forward voltage rectifiers having PNP transistors.

公开(公告)号：US09601473B2

公开(公告)日：2017-03-21

申请号：US14928874

申请日：2015-10-30

申请人： IXYS Corporation

发明人： Ashley Golland ,  Franklin J. Wakeman ,  Howard D. Neal

IPC分类号： H01L25/07 ,  H01L25/11 ,  H01L23/12 ,  H01L23/367 ,  H01L23/492 ,  H01L29/739 ,  H01L23/50 ,  H01L23/373 ,  H01L23/043 ,  H01L23/00

CPC分类号： H01L25/115 ,  H01L23/043 ,  H01L23/12 ,  H01L23/367 ,  H01L23/3675 ,  H01L23/3736 ,  H01L23/492 ,  H01L23/50 ,  H01L24/72 ,  H01L25/072 ,  H01L29/7393 ,  H01L2224/06181 ,  H01L2224/18 ,  H01L2224/73267 ,  H01L2924/0002 ,  H01L2924/13055 ,  H01L2924/00

摘要： A press pack module includes a collector module terminal, an emitter module terminal, a gate module terminal, and an auxiliary module terminal. Each IGBT cassette within the module includes a set of shims, two contact pins, and an IGBT die. The first contact pin provides part of a first electrical connection between the gate module terminal and the IGBT gate pad. The second contact pin provides part of a second electrical connection between the auxiliary module terminal and a shim that in turn contacts the IGBT emitter pad. The electrical connection between the auxiliary emitter terminal and each emitter pad of the many IGBTs is a balanced impedance network. The balanced network is not part of the high current path through the module. By supplying a gate drive signal between the gate and auxiliary emitter terminals, simultaneous IGBT turn off in high speed and high current switching conditions is facilitated.

公开(公告)号：US09544961B1

公开(公告)日：2017-01-10

申请号：US14978783

申请日：2015-12-22

申请人： IXYS Corporation

发明人： Bret Ross Howe ,  Narasimham Patibandla

IPC分类号： H05B41/00 ,  H05B33/08

CPC分类号： H05B33/0809 ,  H05B33/0824

摘要： A system for driving a multi-stage LED with low distortion and with current proportional to rectified input voltage is disclosed. In an exemplary embodiment, an apparatus includes LED groups connected in series to form an LED string having a first node, a last node, and intermediate nodes. The apparatus also includes current cells having inputs coupled to the nodes and outputs coupled to an output resistor. Each current cell selectively regulates current to flow between its respective input and the output resistor. The apparatus also includes a feedback circuit that generates a plurality of feedback voltages from a voltage level at the output resistor. When a selected current cell is enabled by a selected feedback voltage to regulate a selected current level from its respective input to the output resistor, upstream current cells are disabled by their respective feedback voltages.

摘要翻译： 公开了一种用于驱动具有低失真并且与整流输入电压成比例的电流的多级LED的系统。 在示例性实施例中，一种装置包括串联连接的LED组，以形成具有第一节点，最后节点和中间节点的LED串。 该装置还包括具有耦合到节点的输入和耦合到输出电阻器的输出的当前单元。 每个电流单元选择性地调节电流在其相应的输入端和输出电阻之间流动。 该装置还包括从输出电阻器的电压电平产生多个反馈电压的反馈电路。 当所选择的当前单元通过所选择的反馈电压被使能以将其选定的电流电平从其相应输入调节到输出电阻时，上游电流单元被它们各自的反馈电压禁用。

公开(公告)号：US09473074B1

公开(公告)日：2016-10-18

申请号：US14852921

申请日：2015-09-14

申请人： IXYS Corporation

发明人： Eric Blom

IPC分类号： H03F1/02 ,  H03F1/26 ,  H03F3/393

CPC分类号： H03F3/393 ,  H03F1/26 ,  H03F3/45192 ,  H03F3/45475 ,  H03F2200/171 ,  H03F2200/271 ,  H03F2200/411 ,  H03F2200/555 ,  H03F2203/45514 ,  H03H19/004

摘要： A chopper stabilized amplifier with synchronous switched capacitor noise filtering is disclosed. In an exemplary embodiment, an apparatus includes a chopper amplifier having an input that receives an input signal and an output that outputs an amplified signal. The chopper amplifier includes an input chopping circuit and an output chopping circuit, where the input and output chopping circuits operate in response to a chop clock. The apparatus also includes a switched capacitor filter having an input that receives the amplified signal and an output that outputs a filtered signal. The switched capacitor filter operates in response to a filter clock. The apparatus also includes a filter timing adjuster that receives a reference voltage and adjusts a phase of the filter clock with respect to the chop clock to reduce chopper noise on that reference voltage.

摘要翻译： 公开了具有同步开关电容噪声滤波的斩波稳定放大器。 在示例性实施例中，一种装置包括具有接收输入信号的输入和输出放大信号的输出的斩波放大器。 斩波放大器包括输入斩波电路和输出斩波电路，其中输入和输出斩波电路响应于斩波时钟而工作。 该装置还包括具有接收放大信号的输入端和输出滤波信号的输出的开关电容滤波器。 开关电容滤波器响应于滤波器时钟而工作。 该装置还包括滤波器定时调节器，其接收参考电压并相对于斩波时钟调节滤波器时钟的相位，以减小该参考电压的斩波噪声。

公开(公告)号：US09276628B1

公开(公告)日：2016-03-01

申请号：US14530750

申请日：2014-11-01

申请人： IXYS Corporation

发明人： Nathan Zommer

IPC分类号： H04M1/00 ,  H04B1/3888

CPC分类号： H04B1/3888

摘要： A cellular telephone case has front and back panels. A cellular telephone is coupled to the case by pushing the telephone into the case such that the main dock connector of the telephone engages a plug on the back panel. When the telephone is in this position, a back surface of the telephone is held in place on an inside surface of the back panel. The front panel is hinged so that it folds over and covers the telephone. In this folded position, the upward and outward facing outside surface of the front panel includes an E-ink display, a plurality of photovoltaic cells for charging a rechargeable battery of the case, and several buttons. Image information from the telephone is transferred to the case through the dock connector, and then viewed on the display using energy stored in the battery, even after the telephone has been decoupled from the case.

摘要翻译： 蜂窝电话机箱具有前面板和后面板。 蜂窝电话通过将电话机推入外壳而耦合到壳体，使得电话的主基座连接器接合后面板上的插头。 当电话处于该位置时，电话机的后表面被固定在背面板的内表面上。 前面板铰链，使其折叠并覆盖电话。 在该折叠位置，前面板的向上和向外的外表面包括电子墨水显示器，用于对壳体的可充电电池充电的多个光伏电池以及多个按钮。 来自电话的图像信息通过坞站连接器传送到壳体，然后使用存储在电池中的能量在显示器上观看，即使在电话已经从壳体解耦之后。

公开(公告)号：US09089025B2

公开(公告)日：2015-07-21

申请号：US13647139

申请日：2012-10-08

申请人： IXYS Corporation

发明人： Leonid A. Neyman ,  Allan Ming-Lun Lin

IPC分类号： H05B41/16 ,  H05B33/08 ,  H03K7/08 ,  H05B37/02 ,  H04L25/49

CPC分类号： H05B33/0818 ,  H03K7/08 ,  H04L25/4902 ,  H05B37/0254 ,  Y02B20/346

摘要： A system for communicating with a host using control signals over a 1-wire interface is disclosed. The system includes a driver coupled to the host by the 1-wire interface. Control signals are transmitted from the host to the driver for decoding by the driver controller. The control signals are pulse width modulation format signals which are interpreted by the driver as binary encoded command mode signals or analog encoded command mode signals, depending upon when the signals are received in relation to a preamble pulse and a post-amble pulse.

摘要翻译： 公开了一种使用1线接口的控制信号与主机进行通信的系统。 该系统包括通过1线接口耦合到主机的驱动器。 控制信号从主机发送到驱动器，由驱动器控制器进行解码。 控制信号是脉冲宽度调制格式信号，由驱动器解释为二进制编码命令模式信号或模拟编码命令模式信号，这取决于何时相对于前导脉冲和后导后脉冲接收信号。

公开(公告)号：US09042143B2

公开(公告)日：2015-05-26

申请号：US13900451

申请日：2013-05-22

申请人： IXYS Corporation

发明人： Kyoung Wook Seok

IPC分类号： G05F1/46 ,  H05K13/00 ,  H02M3/335 ,  H02M1/08 ,  H02M1/00 ,  H01L27/06

CPC分类号： H02M3/33507 ,  G05F1/46 ,  H01L27/0664 ,  H02M1/083 ,  H02M3/33576 ,  H02M2001/0048 ,  H05K13/00 ,  Y02B70/1433 ,  Y02B70/1491 ,  Y10T29/49117

摘要： A Low Forward Voltage Rectifier (LFVR) circuit includes a bipolar transistor, a parallel diode, and a capacitive current splitting network. The LFVR circuit, when it is performing a rectifying function, conducts the forward current from a first node to a second node provided that the voltage from the first node to the second node is adequately positive. The capacitive current splitting network causes a portion of the forward current to be a base current of the bipolar transistor, thereby biasing the transistor so that the forward current experiences a low forward voltage drop across the transistor. The LFVR circuit sees use in as a rectifier in many different types of switching power converters, including in flyback, Cuk, SEPIC, boost, buck-boost, PFC, half-bridge resonant, and full-bridge resonant converters. Due to the low forward voltage drop across the LFVR, converter efficiency is improved.

摘要翻译： 低正向电压整流器（LFVR）电路包括双极晶体管，并联二极管和电容分流网络。 当LFVR电路正在执行整流功能时，将正向电流从第一节点传导到第二节点，前提是从第一节点到第二节点的电压是正确的。 电容分流网络使正向电流的一部分成为双极晶体管的基极电流，从而偏置晶体管，使得正向电流在晶体管两端经历低的正向压降。 LFVR电路在许多不同类型的开关电源转换器中被用作整流器，包括反激式，Cuk，SEPIC，升压，降压 - 升压，PFC，半桥谐振和全桥谐振转换器。 由于LFVR的正向压降较低，转换器效率得到提高。