-
公开(公告)号：US20060250824A1
公开(公告)日：2006-11-09
申请号：US11125300
申请日：2005-05-09
申请人： Shashank Wekhande , Vijay Mangtani , Sihua Wen
发明人： Shashank Wekhande , Vijay Mangtani , Sihua Wen
IPC分类号： H02M3/335
CPC分类号： H02M3/33507
摘要： A capacitor charging circuit is provided with a primary side output voltage sensing circuit for generating a control signal indicative of whether the output voltage has reached a desired level. The control signal is unaffected by voltage spikes occurring when the main switch is turned off. In one embodiment, the circuit filters the primary side voltage for comparison to a reference voltage in order to provide the control signal. In another embodiment, an AND gate provides the control signal indicating that the output voltage has reached the desired level only in response to the primary side voltage being greater than a reference voltage and the secondary current being discontinuous. In a further embodiment, an AND gate provides the control signal indicating that the output voltage has reached the desired levels only in response to a predetermined delay occurring after the primary side voltage becomes greater than a reference voltage and the secondary current being discontinuous. According to a further aspect of the invention, an auxiliary switch is provided to reduce the reverse recovery time of the output diode in order to speed up the capacitor charging time.
摘要翻译： 电容器充电电路设置有初级侧输出电压检测电路，用于产生指示输出电压是否达到期望电平的控制信号。 当主开关关闭时，控制信号不受电压尖峰的影响。 在一个实施例中，为了提供控制信号，该电路对初级侧电压进行滤波以与参考电压进行比较。 在另一个实施例中，与门提供控制信号，指示输出电压仅在响应于初级侧电压大于参考电压并且次级电流不连续时才达到期望电平。 在另一个实施例中，与门提供控制信号，指示输出电压仅在响应于在初级侧电压变得大于参考电压并且次级电流不连续之后发生的预定延迟时才达到期望电平。 根据本发明的另一方面，提供辅助开关以减小输出二极管的反向恢复时间，以加速电容器充电时间。
-
公开(公告)号：US20100072922A1
公开(公告)日：2010-03-25
申请号：US12629374
申请日：2009-12-02
IPC分类号： H05B41/36
CPC分类号： G05F1/46
摘要： An electronic circuit includes circuit portions for identifying a largest voltage drop through one of a plurality of series connected diode strings and for controlling a boost switching regulator according to the largest voltage drop. The electronic circuit can sense an open circuit series connected diode string, which would otherwise have the largest voltage drop, and can disconnect that open circuit series connected diode string from control of the boost switching regulator. Another electronic circuit includes a current limiting circuit coupled to or within a boost switching regulator and configured to operate with a diode load. Another electronic circuit includes a pulse width modulation circuit configured to dim a series connected string of light emitting diodes.
摘要翻译： 电子电路包括用于识别通过多个串联连接的二极管串中的一个的最大电压降的电路部分，并且用于根据最大电压降来控制升压开关调节器。 电子电路可以感测开路串联的二极管串，否则其将具有最大的电压降，并且可以断开该开路串联连接的二极管串与升压开关调节器的控制。 另一个电子电路包括耦合到升压开关调节器中或其内的限流电路，并配置为在二极管负载下工作。 另一个电子电路包括一个脉冲宽度调制电路，配置成调光串联的发光二极管串。
-
公开(公告)号：US08274238B2
公开(公告)日：2012-09-25
申请号：US12629374
申请日：2009-12-02
IPC分类号： H05B41/16
CPC分类号： G05F1/46
摘要： An electronic circuit includes circuit portions for identifying a largest voltage drop through one of a plurality of series connected diode strings and for controlling a boost switching regulator according to the largest voltage drop. The electronic circuit can sense an open circuit series connected diode string, which would otherwise have the largest voltage drop, and can disconnect that open circuit series connected diode string from control of the boost switching regulator. Another electronic circuit includes a current limiting circuit coupled to or within a boost switching regulator and configured to operate with a diode load. Another electronic circuit includes a pulse width modulation circuit configured to dim a series connected string of light emitting diodes.
摘要翻译： 电子电路包括用于识别通过多个串联连接的二极管串中的一个的最大电压降的电路部分，并且用于根据最大电压降来控制升压开关调节器。 电子电路可以感测开路串联的二极管串，否则其将具有最大的电压降，并且可以断开该开路串联连接的二极管串与升压开关调节器的控制。 另一个电子电路包括耦合到升压开关调节器中或其内的限流电路，并配置为在二极管负载下工作。 另一个电子电路包括一个脉冲宽度调制电路，配置成调光串联的发光二极管串。
-
公开(公告)号：US07675245B2
公开(公告)日：2010-03-09
申请号：US11619675
申请日：2007-01-04
CPC分类号： G05F1/46
摘要： An electronic circuit includes circuit portions for identifying a largest voltage drop through one of a plurality of series connected diode strings and for controlling a boost switching regulator according to the largest voltage drop. The electronic circuit can sense an open circuit series connected diode string, which would otherwise have the largest voltage drop, and can disconnect that open circuit series connected diode string from control of the boost switching regulator. Another electronic circuit includes a current limiting circuit coupled to or within a boost switching regulator and configured to operate with a diode load. Another electronic circuit includes a pulse width modulation circuit configured to dim a series connected string of light emitting diodes.
摘要翻译： 电子电路包括用于识别通过多个串联连接的二极管串中的一个的最大电压降的电路部分，并且用于根据最大电压降来控制升压开关调节器。 电子电路可以感测开路串联的二极管串，否则其将具有最大的电压降，并且可以断开该开路串联连接的二极管串与升压开关调节器的控制。 另一个电子电路包括耦合到升压开关调节器中或其内的限流电路，并配置为在二极管负载下工作。 另一个电子电路包括一个脉冲宽度调制电路，配置成调光串联的发光二极管串。
-
公开(公告)号：US20080164828A1
公开(公告)日：2008-07-10
申请号：US11619675
申请日：2007-01-04
CPC分类号： G05F1/46
摘要： An electronic circuit includes circuit portions for identifying a largest voltage drop through one of a plurality of series connected diode strings and for controlling a boost switching regulator according to the largest voltage drop. The electronic circuit can sense an open circuit series connected diode string, which would otherwise have the largest voltage drop, and can disconnect that open circuit series connected diode string from control of the boost switching regulator. Another electronic circuit includes a current limiting circuit coupled to or within a boost switching regulator and configured to operate with a diode load. Another electronic circuit includes a pulse width modulation circuit configured to dim a series connected string of light emitting diodes.
摘要翻译： 电子电路包括用于识别通过多个串联连接的二极管串中的一个的最大电压降的电路部分，并且用于根据最大电压降来控制升压开关调节器。 电子电路可以感测开路串联的二极管串，否则其将具有最大的电压降，并且可以断开该开路串联连接的二极管串与升压开关调节器的控制。 另一个电子电路包括耦合到升压开关调节器中或其内的限流电路，并配置为在二极管负载下工作。 另一个电子电路包括一个脉冲宽度调制电路，配置成调光串联的发光二极管串。
-
公开(公告)号：US20130162152A1
公开(公告)日：2013-06-27
申请号：US13334250
申请日：2011-12-22
CPC分类号： H05B33/0851 , H02M3/158 , H02M2001/0009 , H05B33/0818 , H05B33/0827 , Y02B20/346 , Y10T307/25
摘要： In one aspect, a circuit includes a plurality of comparators. Each comparator is configured to receive a first input from a corresponding load of a plurality of loads and to receive a second input as a regulation voltage. The circuit also includes an amplifier configured to receive signals provided by the plurality of comparators, a pulse-width modulation (PWM) circuit configured to receive a control signal from the amplifier and to provide a signal to a primary switch to control voltage provided to the loads and an output switch sequencer coupled to each of the comparators and configured to provide control signals to control switches coupled to the primary switch enabling one control switch to be active at a time. Each control switch provides a voltage increase to a respective load of the plurality of loads if enabled.
摘要翻译： 一方面，电路包括多个比较器。 每个比较器被配置为从多个负载的对应负载接收第一输入并且接收作为调节电压的第二输入。 电路还包括放大器，其被配置为接收由多个比较器提供的信号;脉宽调制（PWM）电路，被配置为从放大器接收控制信号，并向初级开关提供信号以控制提供给 负载和输出开关顺序发生器，其耦合到每个比较器并且被配置为提供控制信号以控制耦合到主开关的开关，使得一个控制开关一次有效。 如果启用，每个控制开关为多个负载的相应负载提供电压增加。
-
公开(公告)号：US07768083B2
公开(公告)日：2010-08-03
申请号：US11335944
申请日：2006-01-20
IPC分类号： H01L29/82
CPC分类号： H01L43/02 , B82Y25/00 , G01R15/08 , G01R15/207 , G01R33/02 , G01R33/06 , G01R33/07 , G01R33/09 , G01R33/093 , H01L23/49541 , H01L25/162 , H01L43/04 , H01L43/065 , H01L43/08 , H01L2224/48091 , H01L2224/48137 , H01L2224/48247 , H01L2924/3025 , H01L2924/00014 , H01L2924/00
摘要： An integrated circuit can have a first substrate supporting a magnetic field sensing element and a second substrate supporting another magnetic field sensing element. The first and second substrates can be arranged in a variety of configurations. Another integrated circuit can have a first magnetic field sensing element and second different magnetic field sensing element disposed on surfaces thereof.
摘要翻译： 集成电路可以具有支撑磁场感测元件的第一基板和支撑另一磁场感测元件的第二基板。 第一和第二基板可以以各种配置布置。 另一个集成电路可以具有设置在其表面上的第一磁场感测元件和第二不同的磁场感测元件。
-
公开(公告)号：US07075287B1
公开(公告)日：2006-07-11
申请号：US11336602
申请日：2006-01-20
IPC分类号： G01R33/00
CPC分类号： G01R15/202 , G01R1/36 , G01R15/207 , H01L24/37 , H01L24/40 , H01L2224/37147 , H01L2224/40095 , H01L2224/40245 , H01L2224/48091 , H01L2224/48247 , H01L2224/73221 , H01L2224/84801 , H01L2224/8485 , H01L2924/01322 , H01L2924/1306 , H01L2924/14 , H01L2924/181 , H01L2924/00014 , H01L2924/00 , H01L2924/00012
摘要： An integrated circuit current sensor includes a lead frame having at least two leads coupled to provide a current conductor portion, and a substrate having a first surface in which is disposed one or more magnetic field sensing elements, with the first surface being proximate to the current conductor portion and a second surface distal from the current conductor portion. In one particular embodiment, the substrate is disposed having the first surface of the substrate above the current conductor portion and the second surface of the substrate above the first surface. In this particular embodiment, the substrate is oriented upside-down in the integrated circuit in a flip-chap arrangement. The integrated circuit includes an overcurrent circuit responsive to a voltage drop generated by a current.
摘要翻译： 集成电路电流传感器包括具有耦合以提供电流导体部分的至少两个引线的引线框架，以及具有第一表面的基板，其中设置有一个或多个磁场感测元件，其中第一表面接近电流 导体部分和远离电流导体部分的第二表面。 在一个具体实施例中，衬底被布置成具有衬底的第一表面在电流导体部分上方，衬底的第二表面在第一表面之上。 在该特定实施例中，衬底在倒装芯片布置中在集成电路中上下颠倒。 集成电路包括响应于由电流产生的电压降的过电流电路。
-
9.发明授权Electronic circuits for driving series connected light emitting diode strings 有权用于驱动串联连接的发光二极管串的电子电路公开(公告)号：US08653756B2
公开(公告)日：2014-02-18
申请号：US13428654
申请日：2012-03-23
IPC分类号： H05B37/02
CPC分类号： H05B33/0815 , G09G3/3413 , G09G3/342 , G09G2320/064 , G09G2330/021 , H05B33/0818 , H05B33/0827 , Y02B20/347
摘要： Electronic circuits provide an error signal to control a regulated output voltage signal generated by a controllable DC-DC converter for driving one or more series connected strings of light emitting diodes.
摘要翻译： 电子电路提供误差信号以控制由用于驱动一个或多个串联连接的发光二极管串的可控DC-DC转换器产生的稳定的输出电压信号。
-
10.发明申请Electronic Circuits and Techniques for Maintaining a Consistent Power Delivered to a Load 有权用于维持传递给负载的一致功率的电子电路和技术公开(公告)号：US20130009556A1
公开(公告)日：2013-01-10
申请号：US13177075
申请日：2011-07-06
CPC分类号： H05B33/0815 , H03K7/08 , H05B33/0827
摘要： Circuits and methods used therein provide an adjustable average current through a load in accordance with a pulse width modulated (PWM) signal. A condition detection circuit is configured to identify a condition of the electronic circuit and to generate a condition signal indicative of the condition. A current extension circuit is coupled receive the condition signal and coupled to receive the PWM signal. The current extension circuit is configured to generate, at the output node of the current extension circuit, an extended PWM signal having a first state and a second state. The first state of the extended PWM signal longer in time than a first state of the PWM signal by an amount related to a value or a state of the condition signal. Current pulses through the load are extended to be longer in accordance with the extended PWM signal.
摘要翻译： 其中使用的电路和方法根据脉宽调制（PWM）信号提供通过负载的可调平均电流。 条件检测电路被配置为识别电子电路的状况并产生指示条件的条件信号。 电流扩展电路被耦合以接收条件信号并被耦合以接收PWM信号。 当前扩展电路被配置为在当前扩展电路的输出节点处产生具有第一状态和第二状态的扩展PWM信号。 扩展PWM信号的第一状态在时间上比PWM信号的第一状态长一个与条件信号的值或状态相关的量。 根据扩展的PWM信号，通过负载的电流脉冲扩展到更长。
-
-
-
-
-
-
-
-
-
搜索结果
38 条记录 (耗时 0.016 秒)