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1. 发明申请

WO2011030152A1 LATERAL INSULATED GATE BIPOLAR TRANSISTORS (LIGBTs) 审中-公开
标题翻译：横向绝缘门双极晶体管（LIGBT）
公开(公告)号：WO2011030152A1
公开(公告)日：2011-03-17
申请号：PCT/GB2010/051505
申请日：2010-09-09
申请人： CAMBRIDGE SEMICONDUCTOR LIMITED , UDREA, Florin , TRAJKOVIC, Tanya , PATHIRANA, Vasantha , UDUGAMPOLA, Nishad
发明人： UDREA, Florin , TRAJKOVIC, Tanya , PATHIRANA, Vasantha , UDUGAMPOLA, Nishad
IPC分类号： H01L21/331 , H01L29/739
CPC分类号： H01L29/7394 , H01L29/66325 , H01L29/7393
摘要： This invention generally relates to lateral insulated gate bipolar transistors (LIGBTs), for example in integrated circuits, methods of increasing switching speed of an LIGBT, a method of suppressing parasitic thyristor latch-up in a bulk silicon LIGBT, and methods of fabricating an LIGBT. In particular, a method of suppressing parasitic thyristor latch-up in a bulk silicon LIGBT comprises selecting a current gain αv for a vertical transistor of a parasitic thyristor of the LIGBT such that in at least one predetermined mode of operation of the LIGBT αv
摘要翻译：本发明一般涉及横向绝缘栅双极晶体管（LIGBT），例如在集成电路中，提高LIGBT的开关速度的方法，抑制体硅LIGBT中的寄生晶闸管闩锁的方法以及制造LIGBT的方法。特别地，抑制体硅LIGBT中的寄生晶闸管闩锁的方法包括为LIGBT的寄生晶闸管的垂直晶体管选择电流增益av，使得在LIGBT av <1的至少一个预定操作模式其中ap是具有由半导体表面和富含金属的环氧树脂芯片附着之间的肖特基接触形成的基极 - 发射极结的寄生双极晶体管的电流增益。

2. 发明申请

WO2008132509A2 BIPOLAR TRANSISTOR DRIVERS 审中-公开
标题翻译：双极晶体管驱动器
公开(公告)号：WO2008132509A2
公开(公告)日：2008-11-06
申请号：PCT/GB2008/050300
申请日：2008-04-25
申请人： CAMBRIDGE SEMICONDUCTOR LIMITED , GARNER, David, M. , LALITHAMBIKA, Vinod, A. , RYAN, Paul , JACQUES, Russell
发明人： GARNER, David, M. , LALITHAMBIKA, Vinod, A. , RYAN, Paul , JACQUES, Russell
IPC分类号： H03K17/082
CPC分类号： H03K17/0422 , H02M3/33507 , H03F3/2171 , H03F3/45183 , H03F2203/45322 , H03F2203/45352 , H03F2203/45396 , H03F2203/45466 , H03F2203/45506 , H03K17/0406 , H03K17/0826 , H03K17/0828 , H03K17/567 , H03K17/64 , Y02B70/1433
摘要： We describe a switching power converter comprising a bipolar switching device (BJT or IGBT) switching an inductive load, and including a closed-loop control system. The control system comprises a voltage sensing system to sense a voltage on a collector terminal of the sw itching device and provide a voltage sense signal; a controller; and a drive modulation system coupled to an output of the controller for modulating a drive to the control terminal of said bipolar switching device responsive to a controller control signal; wherein said controller is configured to monitor changes in the sensed voltage during a period when said switching device is switched on and to control said drive modulation system to control the degree of saturation of said bipolar switching device when the device is switched on and hence improve turn-off times.
摘要翻译：我们描述一种开关电源转换器，其包括切换感性负载的双极开关器件（BJT或IGBT），并且包括闭环控制系统。控制系统包括电压感测系统，用于感测开关装置的集电极端子上的电压并提供电压检测信号; 控制器以及驱动调制系统，其耦合到所述控制器的输出端，用于根据控制器控制信号调制对所述双极开关器件的控制端的驱动; 其中所述控制器被配置为在所述开关装置被接通的时段期间监视所感测的电压的变化，并且当所述装置被接通时控制所述驱动调制系统来控制所述双极开关装置的饱和度并因此改善转向关闭时间。

3. 发明申请

WO2008120014A9 FORWARD POWER CONVERTER CONTROLLERS 审中-公开
公开(公告)号：WO2008120014A9
公开(公告)日：2008-10-09
申请号：PCT/GB2008/050222
申请日：2008-03-27
申请人： CAMBRIDGE SEMICONDUCTOR LIMITED , RUSSELL, Jacques , RYAN, Paul , MCKAY, Catriona , DE SILVA, Devarahandi, Indika, Mahesh , GARNER, David, M. , LALITHAMBIKA, Vinod, A.
发明人： RUSSELL, Jacques , RYAN, Paul , MCKAY, Catriona , DE SILVA, Devarahandi, Indika, Mahesh , GARNER, David, M. , LALITHAMBIKA, Vinod, A.
IPC分类号： H02M3/335
摘要： A controller (1040) for a resonant discontinuous forward converter (RDFC), said converter including a transformer (1002) with primary (1002p) and secondary (1002s) matched polarity windings and a switch (1004) to, in operation, cyclically switch DC power to said primary winding (1002p) of said transformer (1002), said converter further having a DC output coupled to said secondary winding (1002s) of said converter, said controller (1040) having a primary sense input (COL) to sense a primary winding signal, s aid primary winding signal representing a voltage across said primary winding (1002p) or across an additional winding coupled to said primary winding, and wherein said controller (1040) is configured to switch on said switch (1004) in response to detection of a reduction in a rate of change of said primary winding signal below a threshold, adjacent a substantially minimum value in an operational cycle of said sensed primary winding signal to convey power to said DC output.

4. 发明申请

WO2008120014A2 FORWARD POWER CONVERTER CONTROLLERS 审中-公开
标题翻译：前转换器控制器
公开(公告)号：WO2008120014A2
公开(公告)日：2008-10-09
申请号：PCT/GB2008/050222
申请日：2008-03-27
申请人： CAMBRIDGE SEMICONDUCTOR LIMITED , RUSSELL, Jacques , RYAN, Paul , MCKAY, Catriona , DE SILVA, Devarahandi, Indika, Mahesh , GARNER, David, M. , LALITHAMBIKA, Vinod, A.
发明人： RUSSELL, Jacques , RYAN, Paul , MCKAY, Catriona , DE SILVA, Devarahandi, Indika, Mahesh , GARNER, David, M. , LALITHAMBIKA, Vinod, A.
IPC分类号： H02M3/335
CPC分类号： H02M3/33538 , Y02B70/1433
摘要： This invention relates to control techniques and con trollers for resonant discontinuous forward power converters (RDFCs). A controller for a resonant discontinuous forward converter (RDFC), said converter including a transformer with primary and secondary matched polarity windings and a switch to, in operation, cyclically switch DC power to said primary winding of said transformer, said converter further having a DC output coupled to said secondary winding of said converter, said controller having a primary sense input to sense a primary winding signal, s aid primary winding signal representing a voltage across said primary winding or across an additional winding coupled to said primary winding, and wherein said controller is configured to switch on said switch in response to detection of a reduction in a rate of change of said primary winding signal below a threshold, adjacent a substantially minimum value in an operational cycle of said sensed primary winding signal to convey power to said DC output.
摘要翻译：本发明涉及用于谐振不连续正向功率转换器（RDFC）的控制技术和控制器。一种用于谐振不连续正向转换器（RDFC）的控制器，所述转换器包括具有初级和次级匹配极性绕组的变压器，以及在操作中将DC电力循环地切换到所述变压器的所述初级绕组的DC开关，所述转换器还具有DC 输出耦合到所述转换器的所述次级绕组，所述控制器具有主感测输入以感测初级绕组信号，辅助初级绕组信号表示跨过所述初级绕组的电压或跨越耦合到所述初级绕组的附加绕组，并且其中所述控制器被配置为响应于检测到所述初级绕组信号的变化率的降低低于阈值，在所述感测到的初级绕组信号的操作周期中相邻于基本上最小的值以将功率传送到所述DC，来接通所述开关输出。

5. 发明申请

WO2008004009A2 SWITCH MODE POWER SUPPLY SYSTEMS 审中-公开
标题翻译：开关电源系统
公开(公告)号：WO2008004009A2
公开(公告)日：2008-01-10
申请号：PCT/GB2007/050388
申请日：2007-07-09
申请人： Cambridge Semiconductor Limited , PIPER, Johan , GARNER, David Michael
发明人： PIPER, Johan , GARNER, David Michael
IPC分类号： H02M3/335
CPC分类号： H02M3/33523 , H02M2001/0009
摘要： This invention generally relates to methods and apparatus for sensing the output current in a switch mode power supply (SMPS), in particular using primary side sensing. A system for estimating the output current of a Switch Mode Power Supply (SMPS), the SMPS including a transformer with at least a primary winding coupled to an input of the SMPS and a secondary winding coupled to an output of the SMPS and having a power switching device to switch power to the primary winding of the transformer, the system comprising: a primary current sense input to sense a primary current in the primary winding of the transformer; a charge signal input to sense a charge signal dependent on a charging time of the transformer; a discharge signal input to sense a discharge signal dependent on a discharging time of the transformer; at least one averager; and a calculator; wherein the primary current is averaged by the averager over at least a switching cycle of the SMPS; and wherein the calculator estimates the output current of the SMPS using the averaged primary current, the charge signal and the discharge signal.
摘要翻译：本发明一般涉及用于感测开关模式电源（SMPS）中的输出电流的方法和装置，特别是使用初级侧感测。一种用于估计开关模式电源（SMPS）的输出电流的系统，所述SMPS包括具有耦合到所述SMPS的输入的至少初级绕组的变压器，以及耦合到所述SMPS的输出并且具有功率开关装置将功率切换到所述变压器的初级绕组，所述系统包括：初级电流感测输入，用于感测所述变压器的初级绕组中的初级电流; 用于根据变压器的充电时间来感测充电信号的充电信号; 放电信号输入，用于根据变压器的放电时间感测放电信号; 至少一个平均者; 和计算器其中所述初级电流在所述SMPS的至少一个开关周期上由所述平均器平均; 并且其中所述计算器使用所述平均一次电流，所述充电信号和所述放电信号来估计所述SMPS的输出电流。

6. 发明申请

WO2007003967A3 SWITCH MODE POWER SUPPLY CONTROL SYSTEMS 审中-公开
公开(公告)号：WO2007003967A3
公开(公告)日：2007-01-11
申请号：PCT/GB2006/050190
申请日：2006-07-05
申请人： CAMBRIDGE SEMICONDUCTOR LIMITED , COULSON, David Robert , GARNER, David , JACQUES, Russell , MOYSE, Philip John
发明人： COULSON, David Robert , GARNER, David , JACQUES, Russell , MOYSE, Philip John
IPC分类号： H02M3/157 , H02M3/335
摘要： This invention generally relates to control systems for switch mode power supplies (SMPS), in particular digital control schemes. A switch mode power supply controller employing a combination of pulse frequency modulation and pulse width modulation to control a power switching device, the controller having: an input to receive an output voltage dependent feedback signal; an output for driving said power switching device; and a controller to provide a switching control signal to said output responsive to said feedback signal from said input, said switching control signal having a switching cycle including an ON portion for switching on said power switching device, and wherein said controller is configured to select one of a plurality of discrete pulse widths for said ON portion of said switching cycle using at least one stored pulse width, and to vary a duration of said switching cycle responsive to said feedback signal.

7. 发明申请

WO2004004013A1 LATERAL SEMICONDUCTOR DEVICE 审中-公开
标题翻译：横向半导体器件
公开(公告)号：WO2004004013A1
公开(公告)日：2004-01-08
申请号：PCT/GB2003/002635
申请日：2003-06-19
申请人： CAMBRIDGE SEMICONDUCTOR LIMITED
发明人： UDREA, Florin
IPC分类号： H01L29/06
CPC分类号： H01L29/0634 , H01L29/0688 , H01L29/0692 , H01L29/0696 , H01L29/0886 , H01L29/7394 , H01L29/7824 , H01L29/861
摘要： A lateral semiconductor device (10) has a semiconductor layer (15) on an insulating substrate (16). The semiconductor layer (15) has a first region (12) of a first conduction type and a second region (13) of a second conduction type with a drift region (14) therebetween. The drift region (14) is provided by a third region (14") of the first conduction type and a fourth region (14') of the second conduction type. The third and fourth (drift) regions (14", 14') are so arranged that when a reverse voltage bias is applied across the first and second regions (12, 13) of the semiconductor layer (15), the third region (14") has locally in the proximity of the first region (12) an excess of impurity charge relative to the fourth region (14'), and the fourth region (14') has locally in the proximity of the second region (13) and excess of impurity charge relative to the third region (14"), and the total volume charge in the third region (14") is substantially equal to the total volume charge in the fourth region (14').
摘要翻译：横向半导体器件（10）在绝缘基板（16）上具有半导体层（15）。半导体层（15）具有第一导电类型的第一区域（12）和第二导电类型的第二区域（13），其间具有漂移区域（14）。漂移区域（14）由第一导电类型的第三区域（14“）和第二导电类型的第四区域（14'）提供，第三和第四（漂移）区域（14”，14'）被布置成当跨越半导体层（15）的第一和第二区域（12,13）施加反向电压偏压时，第三区域（14“）局部地位于第一区域（12）附近杂质电荷相对于第四区域（14'）过量，第四区域（14'）局部地位于第二区域（13）附近，并且杂质电荷相对于第三区域（14“）过量，第三区域（14“）中的总体积电荷基本上等于第四区域（14'）中的总体积电荷。

8. 发明申请

WO2008132501A2 SWITCHING POWER CONVERTERS 审中-公开
标题翻译：开关电源转换器
公开(公告)号：WO2008132501A2
公开(公告)日：2008-11-06
申请号：PCT/GB2008/050289
申请日：2008-04-24
申请人： CAMBRIDGE SEMICONDUCTOR LIMITED , RYAN, Paul
发明人： RYAN, Paul
IPC分类号： H02M3/156 , H02M1/32
CPC分类号： H02M3/156 , H02M1/32 , H02M3/335 , Y02B70/1425 , Y02B70/1433
摘要： We describe systems for forward power converters, in particular a bi - level current sense circuit to enable a single current sense input to provide two different current sense levels. The circuit comprises: a single current sense input connected to a current sense r esistor via a second resistor, for coupling in series with a power switch to generate a current sense signal for current through the switch; first and second comparators sharing a connection to the current sense input and having respective first and second outputs coupled to a controller, these being configured to compare a voltage on said shared input connection against different respective first and second threshold values; and a current generator coupled to said shared input connection. This enables third and fourth bi - level current sense threshold values to be set independently by said current sense and second resistors without changing said first and second threshold values.
摘要翻译：我们描述了正向功率转换器的系统，特别是双电平电流检测电路，以使单个电流检测输入能够提供两种不同的电流检测电平。该电路包括：经由第二电阻器连接到电流感测电阻器的单个电流感测输入端，用于与电源开关串联耦合以产生电流通过开关的电流感测信号; 第一和第二比较器，与电流感测输入共享连接并具有耦合到控制器的相应第一和第二输出，这些被配置为将所述共享输入连接上的电压与不同的相应第一和第二阈值进行比较; 以及耦合到所述共享输入连接的电流发生器。这使得第三和第四双电平电流感测阈值能够由所述电流感测和第二电阻独立设置而不改变所述第一和第二阈值。

9. 发明申请

WO2007135454A1 SWITCH MODE POWER SUPPLY CONTROLLERS 审中-公开
标题翻译：开关电源控制器
公开(公告)号：WO2007135454A1
公开(公告)日：2007-11-29
申请号：PCT/GB2007/050233
申请日：2007-05-02
申请人： CAMBRIDGE SEMICONDUCTOR LIMITED , LALITHAMBIKA, Vinod A. , AMARATUNGA., Gehan , DE SILVA, Devarahandi Indika Mahesh , KUMAR, Jayaraman
发明人： LALITHAMBIKA, Vinod A. , AMARATUNGA., Gehan , DE SILVA, Devarahandi Indika Mahesh , KUMAR, Jayaraman
IPC分类号： H02M3/335
CPC分类号： H02M3/33523 , H02M2001/0006
摘要： This invention relates to switch mode power supply (SMPS) controllers employing primary side sensing. We describe an (SMPS) controller which uses an area correlator, comprising an integrator, to compare an area under a feedback signal waveform between a start point defined by said first timing signal and an end point defined by said second timing signal with a reference area. An output of the area correlator provides an error signal for regulating the SMPS output.
摘要翻译：本发明涉及采用初级侧感测的开关电源（SMPS）控制器。我们描述一种（SMPS）控制器，其使用包括积分器的区域相关器来比较由所述第一定时信号定义的起始点与由所述第二定时信号定义的终点之间的反馈信号波形下的区域与参考区域。区域相关器的输出提供用于调节SMPS输出的误差信号。

10. 发明申请

WO2007135452A1 SWITCH MODE POWER SUPPLY CONTROLLERS 审中-公开
标题翻译：开关电源控制器
公开(公告)号：WO2007135452A1
公开(公告)日：2007-11-29
申请号：PCT/GB2007/050231
申请日：2007-05-02
申请人： CAMBRIDGE SEMICONDUCTOR LIMITED , COULSON, David Robert , PIPER, Johan , GARNER, David M.
发明人： COULSON, David Robert , PIPER, Johan , GARNER, David M.
IPC分类号： H02M3/335
CPC分类号： H02M3/33523
摘要： This invention relates to SMPS controllers employing primary side sensing. We describe a system for identifying a knee point in a sensing waveform, at which the output voltage of the SMPS may be sampled accurately on the primary side. The system identifies the knee point by fitting a tangent to a portion of a power transformer voltage waveform, and samples the voltage waveform at the knee point to determine the SMPS output voltage. In preferred embodiments this technique is implemented using a decaying peak detector, providing a timing signal indicating detection of the knee point. Sample/hold and error amplifier circuits may be employed to achieve output voltage regulation.
摘要翻译：本发明涉及采用初级侧感测的SMPS控制器。我们描述了一种用于识别感测波形中的拐点的系统，其中SMPS的输出电压可以在初级侧被精确地采样。系统通过拟合电力变压器电压波形的一部分切线来识别拐点，并对拐点处的电压波形进行采样，以确定SMPS输出电压。在优选实施例中，该技术使用衰减峰值检测器来实现，提供指示检测拐点的定时信号。可以采用采样/保持和误差放大器电路来实现输出电压调节。

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