公开(公告)号：US20130002219A1

公开(公告)日：2013-01-03

申请号：US13174225

申请日：2011-06-30

申请人： Kevin D'Angelo ,  Andrew Whyte ,  Gustavo Mehas

发明人： Kevin D'Angelo ,  Andrew Whyte ,  Gustavo Mehas

IPC分类号： G05F1/00

CPC分类号： H05B33/0815 ,  H05B33/0812 ,  H05B33/0848

摘要： An integrated circuit contains a current sink that is used to control a channel of varying forward voltage, with a goal of maintaining a minimally sufficient voltage across the current sink. A target voltage for the current sink return is determined, and a switched inductor is used to maintain said voltage. Various target determination schemes are possible, and various enhancements improve startup time, efficiency, and effectiveness.

摘要翻译： 集成电路包含用于控制正向电压变化的通道的电流吸收器，其目标是在电流吸收器两端保持最低的电压。 确定电流吸收器返回的目标电压，并且使用开关电感器来维持所述电压。 各种目标确定方案是可能的，并且各种增强可以提高启动时间，效率和有效性。

公开(公告)号：US08810216B2

公开(公告)日：2014-08-19

申请号：US13174225

申请日：2011-06-30

申请人： Kevin D'Angelo ,  Andrew Whyte ,  Gustavo Mehas

发明人： Kevin D'Angelo ,  Andrew Whyte ,  Gustavo Mehas

IPC分类号： G05F1/00 ,  H05B37/02

CPC分类号： H05B33/0815 ,  H05B33/0812 ,  H05B33/0848

摘要： An integrated circuit contains a current sink that is used to control a channel of varying forward voltage, with a goal of maintaining a minimally sufficient voltage across the current sink. A target voltage for the current sink return is determined, and a switched inductor is used to maintain said voltage. Various target determination schemes are possible, and various enhancements improve startup time, efficiency, and effectiveness.

摘要翻译： 集成电路包含用于控制正向电压变化的通道的电流吸收器，其目标是在电流吸收器两端保持最低的电压。 确定电流吸收器返回的目标电压，并且使用开关电感器来维持所述电压。 各种目标确定方案是可能的，并且各种增强可以提高启动时间，效率和有效性。

公开(公告)号：US07215186B2

公开(公告)日：2007-05-08

申请号：US10907854

申请日：2005-04-18

申请人： Andrew Whyte ,  Kevin D'Angelo

发明人： Andrew Whyte ,  Kevin D'Angelo

IPC分类号： G05F1/10

CPC分类号： G05F1/56

摘要： A multi-channel current regulator includes two or more channels, each channel acting as a current source or sink for a respective load. Each channel regulates its load current so that the load current is proportional to an input voltage supplied to the channel. An operational amplifier is shared between the channels. Each channel is selected in a rotating sequence for connection to the amplifier. As each channel is selected, a two-phase refresh cycle is initiated. During the first phase, the output of the amplifier is charged until it substantially matches the drive voltage of the selected channel. This is followed by the second phase where the output of the amplifier is adjusted until the load current of the selected channel is proportional to a set voltage Vset.

摘要翻译： 多通道电流调节器包括两个或更多个通道，每个通道用作相应负载的电流源或吸收器。 每个通道调节其负载电流，使负载电流与提供给通道的输入电压成比例。 通道之间共享一个运算放大器。 每个通道以旋转顺序选择，用于连接到放大器。 当选择每个通道时，启动两相刷新周期。 在第一阶段期间，放大器的输出被充电，直到其基本上与所选通道的驱动电压相匹配。 接下来是第二阶段，其中调节放大器的输出，直到所选通道的负载电流与设定电压V SUB设定成比例。

公开(公告)号：US20060232325A1

公开(公告)日：2006-10-19

申请号：US10907854

申请日：2005-04-18

申请人： Andrew Whyte ,  Kevin D'Angelo

发明人： Andrew Whyte ,  Kevin D'Angelo

IPC分类号： G05F1/10

CPC分类号： G05F1/56

摘要： A multi-channel current regulator includes two or more channels, each channel acting as a current source or sink for a respective load. Each channel regulates its load current so that the load current is proportional to an input voltage supplied to the channel. An operational amplifier is shared between the channels. Each channel is selected in a rotating sequence for connection to the amplifier. As each channel is selected, a two-phase refresh cycle is initiated. During the first phase, the output of the amplifier is charged until it substantially matches the drive voltage of the selected channel. This is followed by the second phase where the output of the amplifier is adjusted until the load current of the selected channel is proportional to a set voltage Vset.

摘要翻译： 多通道电流调节器包括两个或更多个通道，每个通道用作相应负载的电流源或吸收器。 每个通道调节其负载电流，使负载电流与提供给通道的输入电压成比例。 通道之间共享一个运算放大器。 每个通道以旋转顺序选择，用于连接到放大器。 当选择每个通道时，启动两相刷新周期。 在第一阶段期间，放大器的输出被充电，直到其基本上与所选通道的驱动电压相匹配。 接下来是第二阶段，其中调节放大器的输出，直到所选通道的负载电流与设定电压V SUB设定成比例。

公开(公告)号：US20080231251A1

公开(公告)日：2008-09-25

申请号：US11690111

申请日：2007-03-22

申请人： Andrew Whyte ,  Kevin D'Angelo ,  Joseph Hollinger

发明人： Andrew Whyte ,  Kevin D'Angelo ,  Joseph Hollinger

IPC分类号： H02J3/12

CPC分类号： H05B33/0812 ,  H05B33/0842 ,  Y02B20/345

摘要： A multi-channel current regulator includes two or more channels, each channel acting as a current source or sink for a respective load. Each channel regulates its load current so that the load current is proportional to an input voltage supplied to the channel. An operational amplifier is shared between the channels. Each channel is selected in a rotating sequence for connection to the amplifier. As each channel is selected, a two-phase refresh cycle is initiated. During the first phase, the output of the amplifier is charged until it substantially matches the drive voltage of the selected channel. This is followed by the second phase where the output of the amplifier is adjusted until the load current of the selected channel is proportional to a set voltage Vset.

摘要翻译： 多通道电流调节器包括两个或更多个通道，每个通道用作相应负载的电流源或吸收器。 每个通道调节其负载电流，使负载电流与提供给通道的输入电压成比例。 通道之间共享一个运算放大器。 每个通道以旋转顺序选择，用于连接到放大器。 当选择每个通道时，启动两相刷新周期。 在第一阶段期间，放大器的输出被充电，直到其基本上与所选通道的驱动电压相匹配。 接下来是第二阶段，其中调节放大器的输出，直到所选通道的负载电流与设定电压V SUB设定成比例。

公开(公告)号：US08933634B2

公开(公告)日：2015-01-13

申请号：US13347621

申请日：2012-01-10

申请人： Richard K. Williams ,  Kevin D'Angelo ,  David A. Brown ,  George A. Hariman

发明人： Richard K. Williams ,  Kevin D'Angelo ,  David A. Brown ,  George A. Hariman

IPC分类号： H05B37/00 ,  H05B33/08

CPC分类号： H05B33/0827 ,  H05B33/0884

摘要： A distributed system for driving strings of series-connected LEDs for backlighting, display and lighting applications includes multiple intelligent satellite LED driver ICs connected to a an interface IC via serial bus. The interface IC translates information obtained from a host microcontroller into instructions for the satellite LED driver ICs pertaining to such parameters as duty factor, current levels, phase delay and fault settings. Fault conditions in the LED driver ICs can be transmitted back to the interface IC. An analog current sense feedback system which also links the LED driver ICs determines the supply voltage for the LED strings.

摘要翻译： 用于驱动用于背光，显示和照明应用的串联LED串的分布式系统包括通过串行总线连接到接口IC的多个智能卫星LED驱动器IC。 接口IC将从主机微控制器获得的信息转换成与占空比，当前电平，相位延迟和故障设置等参数有关的卫星LED驱动器IC的指令。 LED驱动器IC中的故障条件可以传回回接口IC。 也连接LED驱动器IC的模拟电流感测反馈系统确定LED串的电源电压。

公开(公告)号：US08803494B2

公开(公告)日：2014-08-12

申请号：US11835650

申请日：2007-08-08

申请人： Kevin D'Angelo ,  Robert Wrathall

发明人： Kevin D'Angelo ,  Robert Wrathall

IPC分类号： H02M3/156

CPC分类号： H02M3/156 ,  H02M1/08 ,  H02M3/1588 ,  Y02B70/1466

摘要： A switching regulator that practices the current invention includes a high-side switch M1 connected between an input voltage and a node LX. A low-side switch is connected between the node LX and ground. An inductor L is connected between LX and an output node (VOUT). A filtering capacitor connects VOUT to ground. The switching regulator has two distinct operational phases. During the first operational phase, the high-side switch is OFF and the low-side switch is ON. During the second operational phase, the high-side switch is ON and the low-side switch acts as a current source. During transitions between the second and first operational phases, the low-side switch is controlled to momentarily decrease the regulated drain-to-source current.

摘要翻译： 实现本发明的开关调节器包括连接在输入电压和节点LX之间的高侧开关M1。 节点LX和地之间连接一个低侧开关。 电感L连接在LX和输出节点（VOUT）之间。 滤波电容将VOUT连接到地。 开关稳压器有两个不同的操作阶段。 在第一个操作阶段，高侧开关为OFF，低端开关为ON。 在第二操作阶段，高侧开关为ON，低端开关作为电流源。 在第二和第一操作阶段之间的转换期间，低侧开关被控制以瞬时地减小调节的漏极 - 源极电流。

公开(公告)号：US08779696B2

公开(公告)日：2014-07-15

申请号：US13346647

申请日：2012-01-09

申请人： Richard Kent Williams ,  Kevin D'Angelo ,  David A. Brown

发明人： Richard Kent Williams ,  Kevin D'Angelo ,  David A. Brown

IPC分类号： H05B37/02

CPC分类号： H04N5/57 ,  H05B33/083 ,  H05B33/0842 ,  H05B37/0254

摘要： An LED driver IC for driving external strings of LEDs comprises a prefix register and a data register connected in series with each other and with the prefix and data registers in other driver ICs. The prefix and data registers of the driver ICs are connected in a daisy chain arrangement with an interface IC. The interface IC loads data identifying a functional latch into the prefix register and data defining a functional condition into the data register of each driver IC. The data in the data register is then transferred to the functional latch to control the functional condition within the LED driver IC.

公开(公告)号：US20130147372A1

公开(公告)日：2013-06-13

申请号：US13347669

申请日：2012-01-10

申请人： Richard K. Williams ,  Kevin D'Angelo ,  David A. Brown

发明人： Richard K. Williams ,  Kevin D'Angelo ,  David A. Brown

IPC分类号： H05B37/00

CPC分类号： H05B33/083 ,  H05B33/0815 ,  H05B33/0827 ,  H05B33/086 ,  H05B37/0254 ,  Y02B20/32

摘要： A system for controlling multiple strings of LEDs includes a group of LED driver ICs, each of which includes a current sense feedback (CSFB) sample latch for storing a digital representation of the forward-voltage drop across a controlled LED string. Each CSFB latch is coupled to a register within a serial lighting interface (SLI) bus that both originates and terminates at an interface IC. As the data on the SLI bus is shifted into the interface IC, the interface IC selects the CSFB word that represents the highest forward-voltage drop of any of the controlled LED strings, which is then used by the interface IC to generate a CSFB signal for setting the appropriate supply voltage for the controlled LED strings.

摘要翻译： 用于控制多串LED的系统包括一组LED驱动器IC，每个LED驱动器IC包括用于存储跨受控LED串的正向压降的数字表示的电流检测反馈（CSFB）采样锁存器。 每个CSFB锁存器耦合到串行照明接口（SLI）总线中的寄存器，两者都在接口IC处发起并终止。 随着SLI总线上的数据被转移到接口IC中，接口IC选择表示任何受控LED串的最高正向压降的CSFB字，然后由接口IC用于产生一个CSFB信号 用于设置受控LED串的适当电源电压。

公开(公告)号：US20130147371A1

公开(公告)日：2013-06-13

申请号：US13347668

申请日：2012-01-10

申请人： Richard K. Williams ,  Kevin D'Angelo ,  David A. Brown

发明人： Richard K. Williams ,  Kevin D'Angelo ,  David A. Brown

IPC分类号： H05B37/00

CPC分类号： H05B33/083 ,  H05B33/0815 ,  H05B33/0827 ,  H05B33/086 ,  H05B37/0254 ,  Y02B20/32

摘要： A system for controlling multiple strings of LEDs includes a group of LED driver IC's, each of which includes a current sense feedback (CSFB) sample latch for storing a digital representation of the forward-voltage drop across a controlled LED string. Each CSFB latch is coupled to a register within a serial lighting interface (SLI) bus that both originates and terminates at an interface IC. As the data on the SLI bus is shifted into the interface IC, the interface IC selects the CSFB word that represents the highest forward-voltage drop of any of the controlled LED strings, which is then used by the interface IC to generate a CSFB signal for setting the appropriate supply voltage for the controlled LED strings.

摘要翻译： 用于控制多串LED的系统包括一组LED驱动器IC，每组LED驱动器IC包括用于存储跨受控LED串的正向压降的数字表示的电流检测反馈（CSFB）采样锁存器。 每个CSFB锁存器耦合到串行照明接口（SLI）总线中的寄存器，两者都在接口IC处发起并终止。 随着SLI总线上的数据被转移到接口IC中，接口IC选择表示任何受控LED串的最高正向压降的CSFB字，然后由接口IC用于产生一个CSFB信号 用于设置受控LED串的适当电源电压。