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    VARIABLE FREQUENCY TIMING CIRCUIT FOR A POWER SUPPLY CONTROL CIRCUIT
    1.
    发明申请
    VARIABLE FREQUENCY TIMING CIRCUIT FOR A POWER SUPPLY CONTROL CIRCUIT 失效
    用于电源控制电路的可变频率时序电路

    公开(公告)号：US20130027996A1

    公开(公告)日：2013-01-31

    申请号：US13193434

    申请日：2011-07-28

    申请人： Stefan Bäurle ,  Guangchao Darson Zhang ,  Arthur B. Odell ,  Edward Deng

    发明人： Stefan Bäurle ,  Guangchao Darson Zhang ,  Arthur B. Odell ,  Edward Deng

    IPC分类号： H02M1/00

    CPC分类号： H02M3/33515 ,  H02M3/156 ,  H02M3/33507

    摘要： An example integrated circuit controller includes a pulse width modulation (PWM) circuit and a timing circuit. The PWM circuit controls a switch to regulate an output of a power supply in response to a switch current flowing through the switch and in response to a clock signal having a switching period. The timing circuit provides the clock signal and includes a timing capacitor where the switching period of the clock signal is equal to a charging time that the timing capacitor charges to an upper reference voltage plus a discharging time that the timing capacitor discharges to a lower reference voltage. The timing circuit increases the charging time of the timing capacitor by decreasing a rate at which the timing capacitor is charged to increase the switching period of the clock signal if an on time of the switch is greater than or equal to a threshold time.

    摘要翻译： 示例性集成电路控制器包括脉宽调制（PWM）电路和定时电路。 PWM电路控制开关以响应于流过开关的开关电流并且响应于具有开关周期的时钟信号来调节电源的输出。 定时电路提供时钟信号，并且包括定时电容器，其中时钟信号的开关周期等于定时电容器充电到较高参考电压加上定时电容器放电到较低参考电压的放电时间的充电时间 。 如果开关的接通时间大于或等于阈值时间，则定时电路通过降低定时电容器被充电的速率来增加定时电容器的充电时间，以增加时钟信号的开关周期。

    Variable frequency timing circuit for a power supply control circuit
    3.
    发明授权
    Variable frequency timing circuit for a power supply control circuit 失效
    电源控制电路的变频定时电路

    公开(公告)号：US08531853B2

    公开(公告)日：2013-09-10

    申请号：US13193434

    申请日：2011-07-28

    申请人： Stefan Bäurle ,  Guangchao Darson Zhang ,  Arthur B. Odell ,  Edward Deng

    发明人： Stefan Bäurle ,  Guangchao Darson Zhang ,  Arthur B. Odell ,  Edward Deng

    IPC分类号： H02M3/335 ,  H02M1/00 ,  H02M7/757 ,  H02H7/122

    CPC分类号： H02M3/33515 ,  H02M3/156 ,  H02M3/33507

    摘要： An example integrated circuit controller includes a pulse width modulation (PWM) circuit and a timing circuit. The PWM circuit controls a switch to regulate an output of a power supply in response to a switch current flowing through the switch and in response to a clock signal having a switching period. The timing circuit provides the clock signal and includes a timing capacitor where the switching period of the clock signal is equal to a charging time that the timing capacitor charges to an upper reference voltage plus a discharging time that the timing capacitor discharges to a lower reference voltage. The timing circuit increases the charging time of the timing capacitor by decreasing a rate at which the timing capacitor is charged to increase the switching period of the clock signal if an on time of the switch is greater than or equal to a threshold time.

    摘要翻译： 示例性集成电路控制器包括脉宽调制（PWM）电路和定时电路。 PWM电路控制开关以响应于流过开关的开关电流并且响应于具有开关周期的时钟信号来调节电源的输出。 定时电路提供时钟信号，并且包括定时电容器，其中时钟信号的开关周期等于定时电容器充电到较高参考电压加上定时电容器放电到较低参考电压的放电时间的充电时间 。 如果开关的接通时间大于或等于阈值时间，则定时电路通过降低定时电容器被充电的速率来增加定时电容器的充电时间，以增加时钟信号的开关周期。

    LED drivers with adaptive hysteretic control circuits and associated methods of operation
    5.
    发明授权
    LED drivers with adaptive hysteretic control circuits and associated methods of operation 有权
    LED驱动器具有自适应迟滞控制电路和相关操作方法

    公开(公告)号：US08269423B2

    公开(公告)日：2012-09-18

    申请号：US12879804

    申请日：2010-09-10

    申请人： Kaiwei Yao ,  Naixing Kuang ,  Edward Deng

    发明人： Kaiwei Yao ,  Naixing Kuang ,  Edward Deng

    IPC分类号： H05B37/00

    CPC分类号： H05B33/0815 ,  Y02B20/347

    摘要： Various embodiments of LED drivers and associated methods of are described below. In one embodiment, a method for controlling an LED driver includes receiving a reference voltage, receiving a feedback voltage from said LED driver, receiving said input voltage as a first feed forward voltage and said output voltage as a second feed forward voltage, generating a hysteretic width based on said first feed forward voltage and said second feed forward voltage, and generating a hysteretic band voltage using said hysteretic width and said reference voltage. The method also includes generating a first control signal for controlling said LED driver based on said hysteretic band voltage and said feedback voltage, inverting said first control signal to generate a second control signal for controlling said LED driver, and achieving a generally fixed frequency for said LED driver.

    摘要翻译： 下面描述LED驱动器和相关方法的各种实施例。 在一个实施例中，一种用于控制LED驱动器的方法包括接收参考电压，从所述LED驱动器接收反馈电压，将所述输入电压作为第一前馈电压接收，所述输出电压作为第二前馈电压，产生滞后 基于所述第一前馈电压和所述第二前馈电压的宽度，以及使用所述滞后宽度和所述参考电压产生滞后带电压。 该方法还包括基于所述迟滞带电压和所述反馈电压产生用于控制所述LED驱动器的第一控制信号，使所述第一控制信号反相以产生用于控制所述LED驱动器的第二控制信号，并且为所述第一控制信号实现所述 LED驱动器