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    • 82. 发明申请
    • Bootstrap Transistor Circuit
    • 自举晶体管电路
    • US20100164597A1
    • 2010-07-01
    • US12628945
    • 2009-12-01
    • Jesper Steensgaard-Madsen
    • Jesper Steensgaard-Madsen
    • H03K17/16
    • H03K17/102H03K17/063H03K17/162H03K2217/0054
    • A switch circuit is described, where a switch to be controlled is formed of two NMOS transistors having their source terminals connected together and their gate terminals connected together. Their drain terminals are the input and output terminals of the switch. A driver circuit controls a bootstrap circuit that is formed of a latching circuit and a capacitor. When the switch is in an off state, the driver circuit connects the capacitor to a charging voltage source for charging the capacitor to a bootstrap voltage, and applies a non-zero voltage across the latching circuit. When the driver circuit is controlled to turn on the switch, the driver circuit disconnects the capacitor from the charging voltage source, and the latching circuit becomes conductive and effectively connects the capacitor across the gate and source terminals of the switch to turn it on with the bootstrap voltage. The bootstrap voltage across the capacitor maintains the latching circuit in a latched conductive state.
    • 描述了开关电路,其中要控制的开关由其源极端子连接在一起并且其栅极端子连接在一起的两个NMOS晶体管形成。 它们的漏极端子是开关的输入和输出端子。 驱动电路控制由锁存电路和电容器形成的自举电路。 当开关处于断开状态时,驱动电路将电容器连接到充电电压源,用于将电容器充电至自举电压,并在锁存电路两端施加非零电压。 当驱动电路被控制以接通开关时,驱动电路将电容器与充电电压源断开,并且锁存电路变得导通并且有效地将电容器跨过开关的栅极和源极端子连接,使其接通 自举电压。 电容器两端的自举电压将锁存电路保持在锁定的导通状态。
    • 83. 发明申请
    • DIMMER CONTROL LEAKAGE PULL DOWN USING MAIN POWER DEVICE IN FLYBACK CONVERTER
    • 使用主电源设备在闪回转换器中使用DIMMER控制漏电
    • US20100141178A1
    • 2010-06-10
    • US12332292
    • 2008-12-10
    • Michael George NegreteWei Gu
    • Michael George NegreteWei Gu
    • H05B41/36
    • H05B33/0845H05B33/0815Y02B20/346Y02B20/347
    • A flyback controller-may include a dimmer input configured to receive a chopped and rectified AC voltage. Each cycle of the signal may have an off period which is substantially attenuated but not always zero due to leakage of a dimmer control from which the chopped AC voltage originates, and an on period which substantially tracks the AC voltage. The ratio of the off period to the on period may be dependent upon a setting of the dimmer control. The flyback controller may include a control circuit configured to generate a switching signal based on the signal from the dimmer input. The switching signal may controllably oscillate between its on and off states during the on periods of the chopped and rectified AC voltage so as to controllably regulate current that is delivered by a secondary winding of a transformer in a flyback converter. The switching signal may be in the on state during the off periods of the chopped and rectified AC voltage, thereby preventing a voltage build up from the dimmer control leakage.
    • 回扫控制器可以包括被配置为接收切断和整流的AC电压的调光器输入。 信号的每个周期可能具有基本上衰减但不总是为零的关闭周期,这是由于来自切断的AC电压的调光器控制的泄漏以及基本跟踪AC电压的导通周期。 关闭周期与开启周期的比率可以取决于调光器控制的设置。 回扫控制器可以包括被配置为基于来自调光器输入的信号产生开关信号的控制电路。 开关信号可以在斩波和整流的交流电压的导通期间在其导通和断开状态之间可控制地振荡,从而可控制地调节在反激式转换器中由变压器的次级绕组传送的电流。 切断信号在斩波和整流交流电压的断开期间可能处于导通状态,从而防止由调光器控制泄漏引起的电压积聚。
    • 84. 发明申请
    • DIMMER-CONTROLLED LEDS USING FLYBACK CONVERTER WITH HIGH POWER FACTOR
    • 使用具有高功率因数的反向转换器的DIMMER控制LED
    • US20100141177A1
    • 2010-06-10
    • US12332299
    • 2008-12-10
    • Michael George NegreteWei GuZhen Li
    • Michael George NegreteWei GuZhen Li
    • H05B37/02
    • H05B33/0815H05B33/0845
    • A flyback controller generates a switching signal for controlling delivery of current into a primary winding of a transformer in a flyback converter. The controller may include an output current monitoring circuit configured to generate a signal representative of an average output current in a secondary winding of the transformer based on a peak input current in the primary winding and a duty cycle of current in the secondary winding. The flyback controller may generate a switching signal that causes a chopped AC voltage from a dimmer control to be converted by the flyback converter into an average output current from a secondary winding of the transformer that is DC isolated from the chopped AC voltage and that varies as a function of the setting of the dimmer control. The flyback controller may not utilize a signal from an opto-isolator.
    • 回扫控制器产生用于控制在回扫转换器中的变压器的初级绕组中的电流传递的开关信号。 控制器可以包括输出电流监测电路,其被配置为基于初级绕组中的峰值输入电流和次级绕组中的电流占空比来产生代表变压器的次级绕组中的平均输出电流的信号。 反激控制器可以产生切换信号,其使得来自调光器控制的斩波AC电压由反激式转换器转换成来自变压器的次级绕组的平均输出电流,其与斩波的交流电压隔离,并且变化为 调光控制功能。 回扫控制器可能不使用来自光隔离器的信号。
    • 85. 发明申请
    • POWER MEASUREMENT CIRCUIT
    • 功率测量电路
    • US20100127755A1
    • 2010-05-27
    • US12338235
    • 2008-12-18
    • John P. MYERS
    • John P. MYERS
    • G06G7/20
    • G01R21/01
    • A power measurement circuit and method are described. The circuit comprises: a transconductance rectifier arrangement including an input and configured to receive a periodically varying input voltage signal having an approximate 50% duty cycle; and an averaging filter for producing a time averaged DC output signal proportional to the mean square of the voltage at the input of the transconductance rectifier arrangement and representative of the average power of the input voltage signal within a range of voltages at the input.
    • 描述功率测量电路和方法。 该电路包括:跨导整流器装置,其包括输入并被配置为接收具有约50%占空比的周期性变化的输入电压信号; 以及平均滤波器,用于产生与跨导整流器装置的输入处的电压的均方成正比的时间平均DC输出信号,并且代表输入端的电压范围内的输入电压信号的平均功率。
    • 88. 发明授权
    • Switching regulator with variable slope compensation
    • 具有可变斜率补偿的开关稳压器
    • US07656142B2
    • 2010-02-02
    • US11180556
    • 2005-07-14
    • Chiawei Liao
    • Chiawei Liao
    • G05F1/00
    • H02M3/156
    • Controlled compensation for a switching regulator is attained by detecting switching duty cycle of the switching regulator, developing a compensation signal having a time duration that is related to the detected switching duty cycle percentage, and generating a duty cycle control signal for the regulator that is dependent in part on the developed compensation signal. The compensation signal has a slope profile and is initiated during each switching cycle at a set point in the cycle that is related to the switching duty cycle percentage,
    • 通过检测开关调节器的开关占空比,开发具有与检测到的开关占空比百分比相关的持续时间的补偿信号,并产生依赖的调节器的占空比控制信号,来实现开关稳压器的受控补偿 部分是开发出的补偿信号。 补偿信号具有斜率分布,并且在与开关占空比百分比相关的周期中的设定点的每个开关周期期间启动,