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1. 发明授权

US08416553B2 Bias and discharge system for low power loss start up and input capacitance discharge 有权
标题翻译：偏压和放电系统用于低功耗启动和输入电容放电
公开(公告)号：US08416553B2
公开(公告)日：2013-04-09
申请号：US12788096
申请日：2010-05-26
申请人： Xiaodong Zhan , Zhixiang Liang , Xiangxu Yu
发明人： Xiaodong Zhan , Zhixiang Liang , Xiangxu Yu
IPC分类号： H01H47/00
CPC分类号： H02M3/33507 , H02M2001/0032 , Y02B70/16
摘要： A power supply including an AC input, a filter, a full wave rectifier, a converter, a second rectifier, and a bias system. The filter includes at least one differential capacitor coupled to the AC input. The full wave rectifier develops a DC bus voltage on a DC bus node. The converter includes a controller and operates to convert the DC bus voltage to a regulated output voltage. The second rectifier is coupled to the AC input for developing a DC bias voltage on a DC bias node. The bias system is coupled between the DC bias node and a reference node and provides at least one start-up voltage to the controller, such as a supply voltage or a sense voltage or the like. The bias circuit includes at least one current discharge path for discharging each differential capacitor within a predetermined time period when AC line voltage is removed.
摘要翻译：包括AC输入，滤波器，全波整流器，转换器，第二整流器和偏置系统的电源。滤波器包括耦合到AC输入的至少一个差分电容器。全波整流器在DC总线节点上产生直流母线电压。该转换器包括一个控制器，用于将DC总线电压转换成稳压输出电压。第二整流器耦合到AC输入，用于在DC偏置节点上开发DC偏置电压。偏置系统耦合在DC偏置节点和参考节点之间，并且向控制器提供至少一个启动电压，例如电源电压或感测电压等。偏置电路包括至少一个电流放电路径，用于在AC线电压被去除的预定时间段内对每个差分电容器进行放电。

2. 发明授权

US08416584B2 Power supply with low power consumption hiccup standby operation 有权
标题翻译：电源低功耗打嗝待机
公开(公告)号：US08416584B2
公开(公告)日：2013-04-09
申请号：US12788045
申请日：2010-05-26
申请人： Xiaodong Zhan , David B. Bell , Zhixiang Liang , Xiangxu Yu
发明人： Xiaodong Zhan , David B. Bell , Zhixiang Liang , Xiangxu Yu
IPC分类号： H02M3/335
CPC分类号： H02M3/33507 , H02M2001/0032 , Y02B70/16
摘要： A power supply including a converter, a capacitance, and a hiccup control module. The converter converts an input voltage to both an output voltage and a preliminary standby voltage when in its active state. The capacitance stores the preliminary standby voltage which is charged to an upper voltage level when the converter is in its active state and which is discharged to a lower voltage level when the converter is in its inactive state. During the standby mode, the hiccup control module operates the converter in hiccup mode by toggling between placing the converter into its inactive state when the preliminary standby voltage is charged to the upper voltage level and placing the converter into its active state when the preliminary standby voltage is discharged to the lower voltage level. The hiccup mode of the power supply eliminates a need for a separate standby converter.
摘要翻译：包括转换器，电容和打嗝控制模块的电源。当处于其激活状态时，转换器将输入电压转换为输出电压和初步备用电压。电容存储当转换器处于其有效状态时被充电到较高电压电平并且当转换器处于其非活动状态时被放电到较低电压电平的初级备用电压。在待机模式期间，打嗝控制模块通过在将初级备用电压充电到较高电压电平并将转换器置于其激活状态时将转换器置于其非活动状态之间切换来操作转换器，放电到较低的电压电平。电源的打嗝模式不需要单独的备用转换器。

3. 发明申请

US20110103104A1 BIAS AND DISCHARGE SYSTEM FOR LOW POWER LOSS START UP AND INPUT CAPACITANCE DISCHARGE 有权
标题翻译：用于低功率损耗启动和输入电容放电的偏置和放电系统
公开(公告)号：US20110103104A1
公开(公告)日：2011-05-05
申请号：US12788096
申请日：2010-05-26
申请人： Xiaodong Zhan , Zhixiang Liang , Xiangxu Yu
发明人： Xiaodong Zhan , Zhixiang Liang , Xiangxu Yu
IPC分类号： H02M3/335
CPC分类号： H02M3/33507 , H02M2001/0032 , Y02B70/16
摘要： A power supply including an AC input, a filter, a full wave rectifier, a converter, a second rectifier, and a bias system. The filter includes at least one differential capacitor coupled to the AC input. The full wave rectifier develops a DC bus voltage on a DC bus node. The converter includes a controller and operates to convert the DC bus voltage to a regulated output voltage. The second rectifier is coupled to the AC input for developing a DC bias voltage on a DC bias node. The bias system is coupled between the DC bias node and a reference node and provides at least one start-up voltage to the controller, such as a supply voltage or a sense voltage or the like. The bias circuit includes at least one current discharge path for discharging each differential capacitor within a predetermined time period when AC line voltage is removed.
摘要翻译：包括AC输入，滤波器，全波整流器，转换器，第二整流器和偏置系统的电源。滤波器包括耦合到AC输入的至少一个差分电容器。全波整流器在DC总线节点上产生直流母线电压。该转换器包括一个控制器，用于将DC总线电压转换成稳压输出电压。第二整流器耦合到AC输入，用于在DC偏置节点上开发DC偏置电压。偏置系统耦合在DC偏置节点和参考节点之间，并且向控制器提供至少一个启动电压，例如电源电压或感测电压等。偏置电路包括至少一个电流放电路径，用于在AC线电压被去除的预定时间段内对每个差分电容器进行放电。

4. 发明申请

US20110025217A1 INRUSH CURRENT LIMITER FOR AN LED DRIVER 有权
标题翻译： INRUSH电流限制为LED驱动器
公开(公告)号：US20110025217A1
公开(公告)日：2011-02-03
申请号：US12822290
申请日：2010-06-24
申请人： Xiaodong Zhan , Fred F. Greenfeld , Xiangxu Yu
发明人： Xiaodong Zhan , Fred F. Greenfeld , Xiangxu Yu
IPC分类号： H05B37/02
CPC分类号： H02M3/335 , H05B33/0815
摘要： An inrush current limiter for use with an LED driver including a current limiting device, a bypass switch device, and a switch drive. The current limiting device is placed in the input current path of the LED driver to limit input current to a predetermined maximum level in response to an AC conductive angle modulated voltage. The bypass switch device is coupled in parallel with the current limit device. The switch drive turns on the bypass switch device to at least partially bypass the current limiting device as a voltage level of an input of a switching converter rises. The input current remains sufficiently high without exceeding the maximum level. The switch drive is implemented with a delay network driven either by a separate transformer winding or by a snubber network. The delay network may have a delay based on the delay caused by the current limiting device.
摘要翻译：一种用于LED驱动器的浪涌电流限制器，包括限流装置，旁路开关装置和开关驱动器。电流限制装置被放置在LED驱动器的输入电流路径中，以响应于交流传导角度调制电压将输入电流限制到预定的最大电平。旁路开关装置与限流装置并联连接。当开关转换器的输入的电压电平上升时，开关驱动器将旁路开关器件接通至少部分地旁路限流器件。输入电流保持足够高而不超过最大电平。开关驱动器采用由单独的变压器绕组或缓冲器网络驱动的延迟网络来实现。延迟网络可以基于由限流装置引起的延迟而具有延迟。

5. 发明授权

US08344657B2 LED driver with open loop dimming control 有权
标题翻译： LED驱动器采用开环调光控制
公开(公告)号：US08344657B2
公开(公告)日：2013-01-01
申请号：US12770993
申请日：2010-04-30
申请人： Xiaodong Zhan , Fred Greenfeld , Xiangxu Yu
发明人： Xiaodong Zhan , Fred Greenfeld , Xiangxu Yu
IPC分类号： H05B41/36
CPC分类号： H05B33/0815
摘要： An LED driver with open loop dimming including a full wave rectifier circuit, a DC/DC converter, and an oscillator circuit. The rectifier is configured to receive an input voltage in the form of an AC conductive angle modulated voltage and to provide a rectified voltage. The DC/DC converter converts the rectified voltage to an output voltage and an output current, where the output current has a magnitude which varies proportionately with a square of a quadratic mean of the input voltage. The oscillator circuit controls switching of the DC/DC converter with constant frequency and constant duty cycle. The DC/DC converter may be a flyback converter and may include a transformer operated in DCM. The driver may include output voltage and/or output current limit. The output current may be limited when the input voltage is within normal operating range of an AC line voltage from which the input voltage is derived.
摘要翻译：具有开环调光的LED驱动器，包括全波整流电路，DC / DC转换器和振荡电路。整流器被配置为接收AC传导角调制电压形式的输入电压并提供整流电压。 DC / DC转换器将整流电压转换为输出电压和输出电流，其中输出电流具有与输入电压的二次平均值的平方成正比的幅度。振荡器电路控制恒定频率和恒定占空比的DC / DC转换器的开关。 DC / DC转换器可以是反激式转换器，并且可以包括在DCM中操作的变压器。驱动器可以包括输出电压和/或输出电流限制。当输入电压处于从其导出输入电压的AC线电压的正常工作范围内时，输出电流可能受到限制。

6. 发明授权

US08324874B2 System and method for controlling synchronous switch for a synchronous converter 失效
标题翻译：用于同步转换器同步开关控制的系统和方法
公开(公告)号：US08324874B2
公开(公告)日：2012-12-04
申请号：US12694594
申请日：2010-01-27
申请人： Xiaodong Zhan
发明人： Xiaodong Zhan
IPC分类号： G05F1/00
CPC分类号： H02M3/1588 , Y02B70/1466
摘要： An apparatus comprises a synchronous converter for providing a regulated output voltage responsive to an input voltage, a control PWM signal to a control switch of the synchronous converter and a synchronous PWM signal to a synchronous switch of the synchronous converter. A first circuit generates the control PWM signal and the synchronous PWM signal responsive to a PWM control signal. The first circuit limits a maximum duty cycle of the synchronous PWM signal to a predetermined level.
摘要翻译：一种装置包括：同步转换器，用于响应于输入电压提供稳定的输出电压，将控制PWM信号提供给同步转换器的控制开关，并将同步PWM信号提供给同步转换器的同步开关。第一电路响应PWM控制信号产生控制PWM信号和同步PWM信号。第一电路将同步PWM信号的最大占空比限制在预定电平。

7. 发明授权

US08339055B2 Inrush current limiter for an LED driver 有权
标题翻译： LED驱动器的浪涌电流限制器
公开(公告)号：US08339055B2
公开(公告)日：2012-12-25
申请号：US12822290
申请日：2010-06-24
申请人： Xiaodong Zhan , Fred F. Greenfeld , Xiangxu Yu
发明人： Xiaodong Zhan , Fred F. Greenfeld , Xiangxu Yu
IPC分类号： H05B37/00
CPC分类号： H02M3/335 , H05B33/0815
摘要： An inrush current limiter for use with an LED driver including a current limiting device, a bypass switch device, and a switch drive. The current limiting device is placed in the input current path of the LED driver to limit input current to a predetermined maximum level in response to an AC conductive angle modulated voltage. The bypass switch device is coupled in parallel with the current limit device. The switch drive turns on the bypass switch device to at least partially bypass the current limiting device as a voltage level of an input of a switching converter rises. The input current remains sufficiently high without exceeding the maximum level. The switch drive is implemented with a delay network driven either by a separate transformer winding or by a snubber network. The delay network may have a delay based on the delay caused by the current limiting device.
摘要翻译：一种用于LED驱动器的浪涌电流限制器，包括限流装置，旁路开关装置和开关驱动器。电流限制装置被放置在LED驱动器的输入电流路径中，以响应于交流传导角度调制电压将输入电流限制到预定的最大电平。旁路开关装置与限流装置并联连接。当开关转换器的输入的电压电平上升时，开关驱动器将旁路开关器件接通至少部分地旁路限流器件。输入电流保持足够高而不超过最大电平。开关驱动器采用由单独的变压器绕组或缓冲器网络驱动的延迟网络来实现。延迟网络可以基于由限流装置引起的延迟而具有延迟。

8. 发明申请

US20110103103A1 POWER SUPPLY WITH LOW POWER CONSUMPTION HICCUP STANDBY OPERATION 有权
标题翻译：低功耗便携式电源供电
公开(公告)号：US20110103103A1
公开(公告)日：2011-05-05
申请号：US12788045
申请日：2010-05-26
申请人： Xiaodong Zhan , David B. Bell , Zhixiang Liang , Xiangxu Yu
发明人： Xiaodong Zhan , David B. Bell , Zhixiang Liang , Xiangxu Yu
IPC分类号： H02M3/335
CPC分类号： H02M3/33507 , H02M2001/0032 , Y02B70/16
摘要： A power supply including a converter, a capacitance, and a hiccup control module. The converter converts an input voltage to both an output voltage and a preliminary standby voltage when in its active state. The capacitance stores the preliminary standby voltage which is charged to an upper voltage level when the converter is in its active state and which is discharged to a lower voltage level when the converter is in its inactive state. During the standby mode, the hiccup control module operates the converter in hiccup mode by toggling between placing the converter into its inactive state when the preliminary standby voltage is charged to the upper voltage level and placing the converter into its active state when the preliminary standby voltage is discharged to the lower voltage level. The hiccup mode of the power supply eliminates a need for a separate standby converter.
摘要翻译：包括转换器，电容和打嗝控制模块的电源。当处于其激活状态时，转换器将输入电压转换为输出电压和初步备用电压。电容存储当转换器处于其有效状态时被充电到较高电压电平并且当转换器处于其非活动状态时被放电到较低电压电平的初级备用电压。在待机模式期间，打嗝控制模块通过在将初级备用电压充电到较高电压电平并将转换器置于其激活状态时将转换器置于其非活动状态之间切换来操作转换器，当初始待机电压放电到较低的电压电平。电源的打嗝模式不需要单独的备用转换器。

9. 发明申请

US20110101877A1 LED DRIVER WITH OPEN LOOP DIMMING CONTROL 有权
标题翻译： LED驱动器与开环调光控制
公开(公告)号：US20110101877A1
公开(公告)日：2011-05-05
申请号：US12770993
申请日：2010-04-30
申请人： Xiaodong Zhan , Fred F. Greenfeld , Xiangxu Yu
发明人： Xiaodong Zhan , Fred F. Greenfeld , Xiangxu Yu
IPC分类号： H05B37/02 , H05B41/16
CPC分类号： H05B33/0815
摘要： An LED driver with open loop dimming including a full wave rectifier circuit, a DC/DC converter, and an oscillator circuit. The rectifier is configured to receive an input voltage in the form of an AC conductive angle modulated voltage and to provide a rectified voltage. The DC/DC converter converts the rectified voltage to an output voltage and an output current, where the output current has a magnitude which varies proportionately with a square of a quadratic mean of the input voltage. The oscillator circuit controls switching of the DC/DC converter with constant frequency and constant duty cycle. The DC/DC converter may be a flyback converter and may include a transformer operated in DCM. The driver may include output voltage and/or output current limit. The output current may be limited when the input voltage is within normal operating range of an AC line voltage from which the input voltage is derived.
摘要翻译：具有开环调光的LED驱动器，包括全波整流电路，DC / DC转换器和振荡电路。整流器被配置为接收AC传导角调制电压形式的输入电压并提供整流电压。 DC / DC转换器将整流电压转换为输出电压和输出电流，其中输出电流具有与输入电压的二次平均值的平方成正比的幅度。振荡器电路控制恒定频率和恒定占空比的DC / DC转换器的开关。 DC / DC转换器可以是反激式转换器，并且可以包括在DCM中操作的变压器。驱动器可以包括输出电压和/或输出电流限制。当输入电压处于从其导出输入电压的AC线电压的正常工作范围内时，输出电流可能受到限制。

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