Fast start-up low-voltage bandgap reference voltage generator
    2.
    发明授权
    Fast start-up low-voltage bandgap reference voltage generator 失效
    快速启动低压带隙参考电压发生器

    公开(公告)号:US08283974B2

    公开(公告)日:2012-10-09

    申请号:US12984088

    申请日:2011-01-04

    IPC分类号: G05F1/10

    CPC分类号: G05F3/30

    摘要: A fast start-up low-voltage bandgap reference voltage generator uses two current generators to provide a first current having a positive temperature coefficient and a second current having a negative temperature coefficient, respectively, and a resistor to generate a temperature independent output voltage according to the sum of the first and second currents. The current generator for providing the first current has a self-bias circuit which uses a single MOSFET to establish the first current, and thereby avoids error caused by mismatched MOSFETs.

    摘要翻译: 快速启动低电压带隙参考电压发生器使用两个电流发生器来分别提供具有正温度系数的第一电流和具有负温度系数的第二电流,以及根据下述方式产生与温度无关的输出电压的电阻器 第一和第二电流的总和。 用于提供第一电流的电流发生器具有使用单个MOSFET建立第一电流的自偏置电路,从而避免由不匹配的MOSFET引起的误差。

    Hybrid battery charger and control circuit and method thereof
    3.
    发明授权
    Hybrid battery charger and control circuit and method thereof 失效
    混合电池充电器及其控制电路及其方法

    公开(公告)号:US08269461B2

    公开(公告)日:2012-09-18

    申请号:US12831494

    申请日:2010-07-07

    IPC分类号: H01M10/44 H01M10/46

    摘要: A hybrid battery charger includes a control circuit and a power stage. The control circuit includes an error amplifier to generate a first error signal and a second error signal according to an output voltage and an output current of the hybrid battery charger, a linear controller to generate a first control signal according to the first error signal, a PWM controller to generate a second control signal and a third control signal according to the second error signal, and according to a mode signal, a multiplexer to select the first control signal for the power stage to operate the hybrid battery charger in a linear mode, or the second and third control signals for the power stage to operate the hybrid battery charger in a switching mode.

    摘要翻译: 混合电池充电器包括控制电路和功率级。 控制电路包括误差放大器,根据混合电池充电器的输出电压和输出电流产生第一误差信号和第二误差信号;线性控制器,用于根据第一误差信号产生第一控制信号; PWM控制器,根据第二误差信号产生第二控制信号和第三控制信号,并且根据模式信号,多路复用器选择用于功率级的第一控制信号以以线性模式操作混合电池充电器, 或用于功率级的第二和第三控制信号以开关模式操作混合电池充电器。

    Power safety system
    4.
    发明授权
    Power safety system 失效
    电力安全系统

    公开(公告)号:US08203234B2

    公开(公告)日:2012-06-19

    申请号:US12720024

    申请日:2010-03-09

    IPC分类号: H02J1/10 H02J3/38

    CPC分类号: H02J7/0031 Y10T307/544

    摘要: A power safety system includes a first MOS, a second MOS, a switch and a body controller. The first MOS is connected between a power input and a power output. The second MOSFET is connected between the power output and a charging output. The switch has an end connected to the body of the first MOS, and the opposite end switched between the source and the drain of the first MOS. A body controller controls the switch according to the voltage at the power input and the voltage at the power output, to connect the body of the first MOS to the source or the drain of the first MOS. By switching the switch, the first MOS will have a parasitic diode effective to prevent a reverse current from the power output to the power input.

    摘要翻译: 电力安全系统包括第一MOS,第二MOS,开关和主体控制器。 第一个MOS连接在电源输入和电源输出之间。 第二个MOSFET连接在电源输出和充电输出之间。 开关的端部连接到第一MOS的主体,并且相对端在第一MOS的源极和漏极之间切换。 主体控制器根据电源输入端的电压和电源输出端的电压来控制开关,将第一MOS的主体连接到第一个MOS的源极或漏极。 通过切换开关,第一个MOS将有一个有效的寄生二极管,以防止从功率输出到电源输入的反向电流。

    Perceptually linear LED brightness control
    5.
    发明授权
    Perceptually linear LED brightness control 失效
    感知线性LED亮度控制

    公开(公告)号:US08198830B2

    公开(公告)日:2012-06-12

    申请号:US12320503

    申请日:2009-01-28

    IPC分类号: H05B37/02

    摘要: A current regulator includes a first current source to provide a reference current varying with a dimming step, and a second current source to generate a drive current for a white LED according to the reference current. The reference current and the dimming step have a relationship identical to or approximating a relationship between luminance and lightness perceived by human eyes. Thus, the white LED is controlled to have a linear variation of the luminance perceived by human eyes when the dimming step is changed.

    摘要翻译: 电流调节器包括:第一电流源,用于提供随着调光步长变化的参考电流;以及第二电流源,以根据参考电流产生白光LED的驱动电流。 参考电流和调光步骤具有与人眼感知的亮度和亮度之间的关系相同或近似的关系。 因此,当改变调光步骤时,白色LED被控制为具有人眼感知的亮度的线性变化。

    Boost converter LED driver and controller thereof
    6.
    发明授权
    Boost converter LED driver and controller thereof 有权
    升压转换器LED驱动器及其控制器

    公开(公告)号:US08169159B2

    公开(公告)日:2012-05-01

    申请号:US12232696

    申请日:2008-09-23

    CPC分类号: H05B33/0815

    摘要: A LED driver is disclosed for providing a current for LED lighting. The LED driver includes an inductor and a controller having a power switch, and the inductor, the power switch and a LED to be driven are configured to be an asynchronous boost converter. Because the driven LED serves as a rectifier diode of the asynchronous boost converter, the controller may have fewer components and requires smaller die area.

    摘要翻译: 公开了一种用于为LED照明提供电流的LED驱动器。 LED驱动器包括电感器和具有电源开关的控制器,并且电感器,电源开关和要驱动的LED被配置为异步升压转换器。 由于驱动LED用作异步升压转换器的整流二极管,所以控制器可能具有较少的元件并且需要更小的管芯面积。

    Universal serial bus charger circuit and charging method
    8.
    发明授权
    Universal serial bus charger circuit and charging method 有权
    通用串行总线充电器电路和充电方式

    公开(公告)号:US08049462B2

    公开(公告)日:2011-11-01

    申请号:US12284235

    申请日:2008-09-18

    IPC分类号: H02J7/02

    摘要: The present invention discloses a universal serial bus (USB) charging circuit, comprising: a charging path for charging a battery from a USB host; a charging switch located on the charging path; a current sensing circuit for sensing current information on the charging path; a maximum available current detection circuit for detecting the maximum available current from the USB host; and a loop controller circuit for controlling the charging switch so that the charging current on the charging path is substantially equal to the maximum available current detected by the maximum available current detection circuit, wherein the maximum available current detection circuit detects the maximum available current during circuit initialization and stores it.

    摘要翻译: 本发明公开了一种通用串行总线(USB)充电电路,包括:用于从USB主机对电池充电的充电路径; 位于充电路径上的充电开关; 用于感测充电路径上的当前信息的电流感测电路; 用于检测来自USB主机的最大可用电流的最大可用电流检测电路; 以及环路控制器电路,用于控制充电开关,使得充电路径上的充电电流基本上等于由最大可用电流检测电路检测的最大可用电流,其中最大可用电流检测电路检测电路中的最大可用电流 初始化并存储它。

    Adaptive zero current sense apparatus and method for a switching regulator
    9.
    发明授权
    Adaptive zero current sense apparatus and method for a switching regulator 有权
    自适应零电流检测装置和开关调节器的方法

    公开(公告)号:US07940596B2

    公开(公告)日:2011-05-10

    申请号:US12588946

    申请日:2009-11-03

    IPC分类号: G11C5/14

    摘要: A switching regulator includes a low-side switch having a body diode. During the low-side switch is on, a zero-current sense circuit monitors the inductor current of the switching regulator and triggers a signal to turn off the low-side switch when the inductor current falls down to a zero-current threshold, to prevent reverse inductor current from the output terminal of the switching regulator. A body-diode turn-on time controller monitors the turn-on time of the body diode and adjusts the zero-current threshold according thereto, and the turn-on time of the body diode can be reduced to an optimal interval subsequently. The self-adjustable zero-current threshold is adaptive according to the application conditions, such as the inductor size, input voltage and output voltage of the switching regulator.

    摘要翻译: 开关调节器包括具有体二极管的低侧开关。 在低侧开关导通时,零电流检测电路监测开关稳压器的电感电流,并在电感电流下降到零电流阈值时触发信号关闭低边开关,以防止 反向电感电流从开关稳压器的输出端子。 体二极管导通时间控制器监视体二极管的接通时间并根据其调整零电流阈值,并且体二极管的接通时间可以随后降低到最佳间隔。 根据应用条件,自适应零电流阈值是自适应的,如开关稳压器的电感尺寸,输入电压和输出电压。

    Non-synchronous boost converter including low-voltage device for load disconnection
    10.
    发明申请
    Non-synchronous boost converter including low-voltage device for load disconnection 有权
    非同步升压转换器包括用于负载断开的低压装置

    公开(公告)号:US20100026257A1

    公开(公告)日:2010-02-04

    申请号:US12318665

    申请日:2009-01-06

    IPC分类号: G05F1/00

    CPC分类号: H02M3/158

    摘要: A non-synchronous boost converter includes a low-voltage device connected between the input voltage terminal and the output voltage terminal of the converter. When the converter is shutdown, the low-voltage device disconnects the output voltage terminal and the input voltage terminal. Since it is a low-voltage device used in the converter for load disconnection, the efficiency of the converter is improved with lower cost.

    摘要翻译: 非同步升压转换器包括连接在转换器的输入电压端子和输出电压端子之间的低压装置。 当转换器关闭时,低压设备断开输出电压端子和输入电压端子。 由于它是用于负载断路的转换器中的低压装置,所以转换器的效率以较低的成本提高。