公开(公告)号：US08804289B2

公开(公告)日：2014-08-12

申请号：US12682746

申请日：2008-10-13

申请人： Denis Crespo ,  Herve Marie ,  Nguyen Trieu Luan Le ,  Mickael Lucas

发明人： Denis Crespo ,  Herve Marie ,  Nguyen Trieu Luan Le ,  Mickael Lucas

IPC分类号： H02H9/04

CPC分类号： H01L27/0266 ,  H01L27/0259 ,  H02H9/046

摘要： A protection circuit (100, 700) is disclosed for protecting an integrated circuit having a first supply rail (Vcc) and a second supply rail (Vss) from exposure to an excessive voltage. The protection circuit (100, 700) comprises a sensor (120) for sensing a voltage increase on the first supply rail (Vcc). Such a sensor may be implemented as an RC element. The sensor (120) has an output coupled to a signal path for providing a detection signal on said path. The sensor (120) triggers a clamping circuit (180) to clamp the first supply rail (Vcc) to the second supply rail (Vss) in response to the detection signal, which typically signals an ESD event on the supply rails. A pre-amplifying stage (160) is coupled between the sensor (120) and the clamping circuit (180) to amplify the detection signal for the clamping circuit (180). The protection circuit further comprises a hold circuit (140) for holding the control input of the pre-amplifying stage (160) in an enabled state upon termination of the detection signal. Such a hold circuit may comprise a further RC element for accelerating the activation of the clamping circuit (180) and extending the activation of the clamping circuit beyond the termination of the detection signal, thus yielding a more efficient protection circuit (100, 700).

摘要翻译： 公开了一种用于保护具有第一电源轨（Vcc）和第二电源轨（Vss）的集成电路不被暴露于过电压的保护电路（100,700）。 保护电路（100,700）包括用于感测第一电源轨（Vcc）上的电压增加的传感器（120）。 这样的传感器可以被实现为RC元件。 传感器（120）具有耦合到信号路径的输出，用于在所述路径上提供检测信号。 响应于检测信号，传感器（120）触发钳位电路（180）将第一电源轨（Vcc）钳位到第二电源轨（Vss），该检测信号通常表示电源轨上的ESD事件。 预放大级（160）耦合在传感器（120）和钳位电路（180）之间，以放大钳位电路（180）的检测信号。 保护电路还包括保持电路（140），用于在检测信号终止时将预放大级（160）的控制输入保持在使能状态。 这种保持电路可以包括用于加速钳位电路（180）的激活并且将钳位电路的激活延伸超过检测信号的终止的另外的RC元件，从而产生更有效的保护电路（100,700）。

公开(公告)号：US20100214706A1

公开(公告)日：2010-08-26

申请号：US12682746

申请日：2008-10-13

申请人： Denis Crespo ,  Herve Marie ,  Nguyen Trieu Luan Le ,  Mickael Lucas

发明人： Denis Crespo ,  Herve Marie ,  Nguyen Trieu Luan Le ,  Mickael Lucas

IPC分类号： H02H9/04

CPC分类号： H01L27/0266 ,  H01L27/0259 ,  H02H9/046

摘要： A protection circuit (100, 700) is disclosed for protecting an integrated circuit having a first supply rail (Vcc) and a second supply rail (Vss) from exposure to an excessive voltage. The protection circuit (100, 700) comprises a sensor (120) for sensing a voltage increase on the first supply rail (Vcc). Such a sensor may be implemented as an RC element. The sensor (120) has an output coupled to a signal path for providing a detection signal on said path. The sensor (120) triggers a clamping circuit (180) to clamp the first supply rail (Vcc) to the second supply rail (Vss) in response to the detection signal, which typically signals an ESD event on the supply rails. A pre-amplifying stage (160) is coupled between the sensor (120) and the clamping circuit (180) to amplify the detection signal for the clamping circuit (180). The protection circuit further comprises a hold circuit (140) for holding the control input of the pre-amplifying stage (160) in an enabled state upon termination of the detection signal. Such a hold circuit may comprise a further RC element for accelerating the activation of the clamping circuit (180) and extending the activation of the clamping circuit beyond the termination of the detection signal, thus yielding a more efficient protection circuit (100, 700).

摘要翻译： 公开了一种用于保护具有第一电源轨（Vcc）和第二电源轨（Vss）的集成电路不被暴露于过电压的保护电路（100,700）。 保护电路（100,700）包括用于感测第一电源轨（Vcc）上的电压增加的传感器（120）。 这样的传感器可以被实现为RC元件。 传感器（120）具有耦合到信号路径的输出，用于在所述路径上提供检测信号。 响应于检测信号，传感器（120）触发钳位电路（180）将第一电源轨（Vcc）钳位到第二电源轨（Vss），该检测信号通常表示电源轨上的ESD事件。 预放大级（160）耦合在传感器（120）和钳位电路（180）之间，以放大钳位电路（180）的检测信号。 保护电路还包括保持电路（140），用于在检测信号终止时将预放大级（160）的控制输入保持在使能状态。 这种保持电路可以包括用于加速钳位电路（180）的激活并且将钳位电路的激活延伸超过检测信号的终止的另外的RC元件，从而产生更有效的保护电路（100,700）。

公开(公告)号：US10178716B2

公开(公告)日：2019-01-08

申请号：US13880890

申请日：2011-09-09

申请人： Nguyen Trieu Luan Le

发明人： Nguyen Trieu Luan Le

IPC分类号： H05B33/08

摘要： An LED driver design has a single controller used to drive multiple strings of LEDs. In one aspect there is dynamic threshold voltage setting so that the individual characteristics of the LED strings can be taken into account in the voltage control loop. In another aspect, excess energy is dissipated off-chip in a dedicated heat dissipater, and the routing of current to the heat dissipater is controlled dynamically such that a desired integrated circuit biasing remains stable.

公开(公告)号：US20130257279A1

公开(公告)日：2013-10-03

申请号：US13880890

申请日：2011-09-09

申请人： Nguyen Trieu Luan Le

发明人： Nguyen Trieu Luan Le

IPC分类号： H05B33/08

CPC分类号： H05B33/0809 ,  H05B33/0812 ,  H05B33/0815 ,  H05B33/0827

摘要： An LED driver design has a single controller used to drive multiple strings of LEDs. In one aspect there is dynamic threshold voltage setting so that the individual characteristics of the LED strings can be taken into account in the voltage control loop. In another aspect, excess energy is dissipated off-chip in a dedicated heat dissipater, and the routing of current to the heat dissipater is controlled dynamically such that a desired integrated circuit biasing remains stable.

摘要翻译： LED驱动器设计具有用于驱动多串LED的单个控制器。 在一个方面，存在动态阈值电压设置，使得在电压控制回路中可以考虑LED串的各个特性。 在另一方面，在专用散热器中片外消耗了多余的能量，并且动态地控制电流到散热器的布线，使得期望的集成电路偏置保持稳定。