公开(公告)号：US20130169172A1

公开(公告)日：2013-07-04

申请号：US13339196

申请日：2011-12-28

申请人： John William Kesterson ,  Xiaoyan Wang ,  Xuecheng Jin ,  Enzhu Liang ,  Selcuk Sen

发明人： John William Kesterson ,  Xiaoyan Wang ,  Xuecheng Jin ,  Enzhu Liang ,  Selcuk Sen

IPC分类号： H05B37/02

CPC分类号： H05B33/0815 ,  Y02B20/346

摘要： A system controls a switching power converter to power LED strings using a predictive feedforward control mechanism. An LED controller determines programmed current levels and duty cycles for driving LED strings. The LED controller determines a predicted load for a subsequent cycle of a switching power converter driving the LED strings based on the programmed current levels and duty cycles. A power conversion controller uses the predicted load information to control switching of the switching power converter. This improves the dynamic response of the switching converter to changing load conditions, thereby improving overall power efficiency and performance of the system.

摘要翻译： 系统使用预测前馈控制机制控制开关功率转换器为LED串供电。 LED控制器确定用于驱动LED串的编程电流电平和占空比。 LED控制器基于编程的电流电平和占空比确定驱动LED串的开关功率转换器的后续周期的预测负载。 电力转换控制器使用预测负载信息来控制开关功率转换器的开关。 这改善了开关转换器对变化的负载条件的动态响应，从而提高了系统的整体功率效率和性能。

公开(公告)号：US08791647B2

公开(公告)日：2014-07-29

申请号：US13339196

申请日：2011-12-28

申请人： John William Kesterson ,  Xiaoyan Wang ,  Xuecheng Jin ,  Enzhu Liang ,  Selcuk Sen

发明人： John William Kesterson ,  Xiaoyan Wang ,  Xuecheng Jin ,  Enzhu Liang ,  Selcuk Sen

IPC分类号： G05F1/00

CPC分类号： H05B33/0815 ,  Y02B20/346

摘要： A system controls a switching power converter to power LED strings using a predictive feedforward control mechanism. An LED controller determines programmed current levels and duty cycles for driving LED strings. The LED controller determines a predicted load for a subsequent cycle of a switching power converter driving the LED strings based on the programmed current levels and duty cycles. A power conversion controller uses the predicted load information to control switching of the switching power converter. This improves the dynamic response of the switching converter to changing load conditions, thereby improving overall power efficiency and performance of the system.

摘要翻译： 系统使用预测前馈控制机制控制开关功率转换器为LED串供电。 LED控制器确定用于驱动LED串的编程电流电平和占空比。 LED控制器基于编程的电流电平和占空比确定驱动LED串的开关功率转换器的后续周期的预测负载。 电力转换控制器使用预测负载信息来控制开关功率转换器的开关。 这改善了开关转换器对变化的负载条件的动态响应，从而提高了系统的整体功率效率和性能。

公开(公告)号：US08710752B2

公开(公告)日：2014-04-29

申请号：US13040229

申请日：2011-03-03

申请人： Xuecheng Jin ,  Minjong Kim ,  Enzhu Liang ,  John William Kesterson ,  Xiaoyan Wang

发明人： Xuecheng Jin ,  Minjong Kim ,  Enzhu Liang ,  John William Kesterson ,  Xiaoyan Wang

IPC分类号： H05B37/00

CPC分类号： H05B33/0815 ,  H05B33/0827 ,  H05B33/0851

摘要： A system that provides an intelligent approach to driving multiple strings of LEDs. A processing device determines an optimal current level for each LED string from a limited set of allowed currents. The processing device also determines a PWM duty cycle for driving the LEDs in each LED string to provide precise brightness control over the LED string. The settings for the current level and duty cycle are transmitted to an LED driver for regulating the current and on-off times of the LED strings. Beneficially, the system reduces the size of the LED driver while leveraging existing resources available in the processing device to operate the LEDs in a power efficient manner.

摘要翻译： 提供智能方法来驱动多串LED的系统。 处理装置从有限的允许电流集合确定每个LED串的最佳电流电平。 处理装置还确定用于驱动每个LED串中的LED的PWM占空比，以提供对LED串的精确亮度控制。 当前电平和占空比的设置被传送到LED驱动器，用于调节LED串的电流和开关时间。 有利的是，该系统在利用处理装置中可利用的现有资源以功率有效的方式来操作LED的同时减小了LED驱动器的尺寸。

公开(公告)号：US20120223648A1

公开(公告)日：2012-09-06

申请号：US13040229

申请日：2011-03-03

申请人： Xuecheng Jin ,  Minjong Kim ,  Enzhu Liang ,  John William Kesterson ,  Xiaoyan Wang

发明人： Xuecheng Jin ,  Minjong Kim ,  Enzhu Liang ,  John William Kesterson ,  Xiaoyan Wang

IPC分类号： H05B37/02

CPC分类号： H05B33/0815 ,  H05B33/0827 ,  H05B33/0851

摘要： A system that provides an intelligent approach to driving multiple strings of LEDs. A processing device determines an optimal current level for each LED string from a limited set of allowed currents. The processing device also determines a PWM duty cycle for driving the LEDs in each LED string to provide precise brightness control over the LED string. The settings for the current level and duty cycle are transmitted to an LED driver for regulating the current and on-off times of the LED strings. Beneficially, the system reduces the size of the LED driver while leveraging existing resources available in the processing device to operate the LEDs in a power efficient manner.

摘要翻译： 提供智能方法来驱动多串LED的系统。 处理装置从有限的允许电流集合确定每个LED串的最佳电流电平。 处理装置还确定用于驱动每个LED串中的LED的PWM占空比，以提供对LED串的精确亮度控制。 当前电平和占空比的设置被传送到LED驱动器，用于调节LED串的电流和开关时间。 有利的是，该系统在利用处理装置中可利用的现有资源以功率有效的方式来操作LED的同时减小了LED驱动器的尺寸。

公开(公告)号：US20100225293A1

公开(公告)日：2010-09-09

申请号：US12398878

申请日：2009-03-05

申请人： Xiaoyan Wang ,  Liang Yan ,  Junjie Zheng ,  John William Kesterson ,  Clarita Poon

发明人： Xiaoyan Wang ,  Liang Yan ,  Junjie Zheng ,  John William Kesterson ,  Clarita Poon

IPC分类号： G05F1/10

CPC分类号： H02M3/33507 ,  H02M2001/0032 ,  Y02B70/16

摘要： In a switching power converter, PWM mode and PFM mode are separated into two independent control sections with the control voltage range in each control section determined independently. Each of the PWM and PFM modulation modes cannot operate continuously beyond its boundaries, thereby forming a control gap between the two control sections within which no continuous operation is allowed. In order to supply a load condition within the control gap, the power supply operates at the two boundaries of the control gap. Transition between PWM and PFM modes occurs fast, with low output voltage ripple. No limitation needs to be imposed on the control voltage range in each of the PWM and PFM control sections, because the control parameters in the PWM and PFM control sections need not be matched to one another, due to separation of the PWM and PFM modes by the control gap.

摘要翻译： 在开关电源转换器中，PWM模式和PFM模式分为两个独立控制部分，每个控制部分的控制电压范围独立确定。 每个PWM和PFM调制模式都不能连续超过其边界，从而在两个控制部分之间形成一个控制间隙，在这两个控制部分之间不允许连续的操作。 为了在控制间隙内提供负载条件，电源在控制间隙的两个边界处工作。 PWM和PFM模式之间的转换发生得很快，输出电压波动较小。 在PWM和PFM控制部分的每个PWM控制部分的控制电压范围不受限制，因为PWM和PFM控制部分中的控制参数不需要彼此匹配，这是由于PWM和PFM模式的分离 控制差距。

公开(公告)号：US20110286248A1

公开(公告)日：2011-11-24

申请号：US13198358

申请日：2011-08-04

申请人： Xiaoyan Wang ,  Liang Yan ,  Junjie Zheng ,  John William Kesterson ,  Clarita Poon

发明人： Xiaoyan Wang ,  Liang Yan ,  Junjie Zheng ,  John William Kesterson ,  Clarita Poon

IPC分类号： H02M3/335

CPC分类号： H02M3/33507 ,  H02M2001/0032 ,  Y02B70/16

摘要： In a switching power converter, PWM mode and PFM mode are separated into two independent control sections with the control voltage range in each control section determined independently. Each of the PWM and PFM modulation modes cannot operate continuously beyond its boundaries, thereby forming a control gap between the two control sections within which no continuous operation is allowed. In order to supply a load condition within the control gap, the power supply operates at the two boundaries of the control gap. Transition between PWM and PFM modes occurs fast, with low output voltage ripple. No limitation needs to be imposed on the control voltage range in each of the PWM and PFM control sections, because the control parameters in the PWM and PFM control sections need not be matched to one another, due to separation of the PWM and PFM modes by the control gap.

摘要翻译： 在开关电源转换器中，PWM模式和PFM模式分为两个独立控制部分，每个控制部分的控制电压范围独立确定。 每个PWM和PFM调制模式都不能连续超过其边界，从而在两个控制部分之间形成一个控制间隙，在这两个控制部分之间不允许连续的操作。 为了在控制间隙内提供负载条件，电源在控制间隙的两个边界处工作。 PWM和PFM模式之间的转换发生得很快，输出电压波动较小。 在PWM和PFM控制部分的每个PWM控制部分的控制电压范围不受限制，因为PWM和PFM控制部分中的控制参数不需要彼此匹配，这是由于PWM和PFM模式的分离 控制差距。

公开(公告)号：US08199539B2

公开(公告)日：2012-06-12

申请号：US13198358

申请日：2011-08-04

申请人： Xiaoyan Wang ,  Liang Yan ,  Junjie Zheng ,  John William Kesterson ,  Clarita Poon

发明人： Xiaoyan Wang ,  Liang Yan ,  Junjie Zheng ,  John William Kesterson ,  Clarita Poon

IPC分类号： H02M3/335 ,  H02M3/157

CPC分类号： H02M3/33507 ,  H02M2001/0032 ,  Y02B70/16

摘要： In a switching power converter, PWM mode and PFM mode are separated into two independent control sections with the control voltage range in each control section determined independently. Each of the PWM and PFM modulation modes cannot operate continuously beyond its boundaries, thereby forming a control gap between the two control sections within which no continuous operation is allowed. In order to supply a load condition within the control gap, the power supply operates at the two boundaries of the control gap. Transition between PWM and PFM modes occurs fast, with low output voltage ripple. No limitation needs to be imposed on the control voltage range in each of the PWM and PFM control sections, because the control parameters in the PWM and PFM control sections need not be matched to one another, due to separation of the PWM and PFM modes by the control gap.

摘要翻译： 在开关电源转换器中，PWM模式和PFM模式分为两个独立控制部分，每个控制部分的控制电压范围独立确定。 每个PWM和PFM调制模式都不能连续超过其边界，从而在两个控制部分之间形成一个控制间隙，在这两个控制部分之间不允许连续的操作。 为了在控制间隙内提供负载条件，电源在控制间隙的两个边界处工作。 PWM和PFM模式之间的转换发生得很快，输出电压波动较小。 在PWM和PFM控制部分的每个PWM控制部分的控制电压范围不受限制，因为PWM和PFM控制部分中的控制参数不需要彼此匹配，这是由于PWM和PFM模式的分离 控制差距。

公开(公告)号：US08018743B2

公开(公告)日：2011-09-13

申请号：US12398878

申请日：2009-03-05

申请人： Xiaoyan Wang ,  Liang Yan ,  Junjie Zheng ,  John William Kesterson ,  Clarita Poon

发明人： Xiaoyan Wang ,  Liang Yan ,  Junjie Zheng ,  John William Kesterson ,  Clarita Poon

IPC分类号： H02M3/335 ,  H02M3/157

CPC分类号： H02M3/33507 ,  H02M2001/0032 ,  Y02B70/16

摘要： In a switching power converter, PWM mode and PFM mode are separated into two independent control sections with the control voltage range in each control section determined independently. Each of the PWM and PFM modulation modes cannot operate continuously beyond its boundaries, thereby forming a control gap between the two control sections within which no continuous operation is allowed. In order to supply a load condition within the control gap, the power supply operates at the two boundaries of the control gap. Transition between PWM and PFM modes occurs fast, with low output voltage ripple. No limitation needs to be imposed on the control voltage range in each of the PWM and PFM control sections, because the control parameters in the PWM and PFM control sections need not be matched to one another, due to separation of the PWM and PFM modes by the control gap.

摘要翻译： 在开关电源转换器中，PWM模式和PFM模式分为两个独立控制部分，每个控制部分的控制电压范围独立确定。 每个PWM和PFM调制模式都不能连续超过其边界，从而在两个控制部分之间形成一个控制间隙，在这两个控制部分之间不允许连续的操作。 为了在控制间隙内提供负载条件，电源在控制间隙的两个边界处工作。 PWM和PFM模式之间的转换发生得很快，输出电压波动较小。 在PWM和PFM控制部分的每个PWM控制部分的控制电压范围不受限制，因为PWM和PFM控制部分中的控制参数不需要彼此匹配，这是由于PWM和PFM模式的分离 控制差距。

公开(公告)号：US20130127344A1

公开(公告)日：2013-05-23

申请号：US13675515

申请日：2012-11-13

申请人： Xuecheng Jin ,  Yu Chong Chang ,  Yang Li ,  Maofeng Lan ,  John W. Kesterson ,  Xiaoyan Wang ,  Chenghung Pan

发明人： Xuecheng Jin ,  Yu Chong Chang ,  Yang Li ,  Maofeng Lan ,  John W. Kesterson ,  Xiaoyan Wang ,  Chenghung Pan

IPC分类号： H05B33/08

CPC分类号： H05B33/0842 ,  H01L22/14 ,  H01L2924/0002 ,  H05B33/0818 ,  H05B33/0827 ,  Y02B20/341 ,  H01L2924/00

摘要： An adaptive switch mode LED driver provides an intelligent approach to driving multiple strings of LEDs. The LED driver determines an optimal current level for each LED channel from a limited set of allowed currents. The LDO driver then determines a PWM duty cycle for driving the LEDs in each LED channel to provide precise brightness control over the LED channels. Beneficially, the LED driver minimizes the power dissipation in the LDO circuits driving each LED string, while also ensuring that the currents in each LED string are maintained within a limited range. A sample and hold LDO allows PWM control over extreme duty cycles with very fast dynamic response. Furthermore, fault protection circuitry ensures fault-free startup and operation of the LED driver.

摘要翻译： 自适应开关模式LED驱动器提供了一种智能方法来驱动多串LED。 LED驱动器从有限的一组允许电流确定每个LED通道的最佳电流电平。 然后，LDO驱动器确定用于驱动每个LED通道中的LED的PWM占空比，以在LED通道上提供精确的亮度控制。 有利的是，LED驱动器使驱动每个LED串的LDO电路的功耗最小化，同时还确保每个LED串中的电流保持在有限的范围内。 采样和保持LDO允许通过非常快的动态响应对极端占空比进行PWM控制。 此外，故障保护电路确保LED驱动器的无故障启动和操作。

公开(公告)号：US08334662B2

公开(公告)日：2012-12-18

申请号：US12558275

申请日：2009-09-11

申请人： Xuecheng Jin ,  Yu Cheng Chang ,  Yang Li ,  Maofeng Lan ,  John W. Kesterson ,  Xiaoyan Wang ,  Chenghung Pan

发明人： Xuecheng Jin ,  Yu Cheng Chang ,  Yang Li ,  Maofeng Lan ,  John W. Kesterson ,  Xiaoyan Wang ,  Chenghung Pan

IPC分类号： G05F1/00 ,  H05B37/02 ,  H05B39/04 ,  H05B41/36

CPC分类号： H05B33/0842 ,  H01L22/14 ,  H01L2924/0002 ,  H05B33/0818 ,  H05B33/0827 ,  Y02B20/341 ,  H01L2924/00

摘要： An adaptive switch mode LED driver provides an intelligent approach to driving multiple strings of LEDs. The LED driver determines an optimal current level for each LED channel from a limited set of allowed currents. The LDO driver then determines a PWM duty cycle for driving the LEDs in each LED channel to provide precise brightness control over the LED channels. Beneficially, the LED driver minimizes the power dissipation in the LDO circuits driving each LED string, while also ensuring that the currents in each LED string are maintained within a limited range. A sample and hold LDO allows PWM control over extreme duty cycles with very fast dynamic response. Furthermore, fault protection circuitry ensures fault-free startup and operation of the LED driver.

摘要翻译： 自适应开关模式LED驱动器提供了一种智能方法来驱动多串LED。 LED驱动器从有限的一组允许电流确定每个LED通道的最佳电流电平。 然后，LDO驱动器确定用于驱动每个LED通道中的LED的PWM占空比，以在LED通道上提供精确的亮度控制。 有利的是，LED驱动器使驱动每个LED串的LDO电路的功耗最小化，同时还确保每个LED串中的电流保持在有限的范围内。 采样和保持LDO允许通过非常快的动态响应对极端占空比进行PWM控制。 此外，故障保护电路确保LED驱动器的无故障启动和操作。