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公开(公告)号：US09622310B2
公开(公告)日：2017-04-11
申请号：US15072642
申请日：2016-03-17
CPC分类号： H05B33/083 , H05B33/0815 , H05B33/0827 , H05B33/086 , H05B37/0254 , Y02B20/32
摘要： According to one aspect, an integrated circuit to control a power supply that supplies power to a plurality of light-emitting diode (LED) strings is provided. The integrated circuit includes an interface circuit to couple to a plurality of serial shift registers that are coupled in a daisy chain. The interface circuit may be configured to receive a plurality of digital values from the plurality of serial shift registers each corresponding to a voltage level at one end of an LED string of the plurality of LED strings and identify a lowest digital value from the plurality of digital values. The integrated circuit may further includes a converter coupled to the interface circuit that is configured to convert the lowest digital value into a control signal and provide the control signal to the power supply to adjust an output voltage of the power supply.
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公开(公告)号：US09723244B2
公开(公告)日：2017-08-01
申请号：US15160205
申请日：2016-05-20
CPC分类号： H04N5/57 , H05B33/083 , H05B33/0842 , H05B37/0254
摘要： An LED driver IC for driving external strings of LEDs includes 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.
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公开(公告)号：US20160198533A1
公开(公告)日：2016-07-07
申请号：US15072642
申请日：2016-03-17
IPC分类号： H05B33/08
CPC分类号： H05B33/083 , H05B33/0815 , H05B33/0827 , H05B33/086 , H05B37/0254 , Y02B20/32
摘要： According to one aspect, an integrated circuit to control a power supply that supplies power to a plurality of light-emitting diode (LED) strings is provided. The integrated circuit includes an interface circuit to couple to a plurality of serial shift registers that are coupled in a daisy chain. The interface circuit may be configured to receive a plurality of digital values from the plurality of serial shift registers each corresponding to a voltage level at one end of an LED string of the plurality of LED strings and identify a lowest digital value from the plurality of digital values. The integrated circuit may further includes a converter coupled to the interface circuit that is configured to convert the lowest digital value into a control signal and provide the control signal to the power supply to adjust an output voltage of the power supply.
摘要翻译： 根据一个方面，提供一种用于控制向多个发光二极管（LED）串提供电力的电源的集成电路。 集成电路包括耦合到以菊花链耦合的多个串行移位寄存器的接口电路。 接口电路可以被配置为从多个串行移位寄存器接收多个数字值，每个串行移位寄存器对应于多个LED串的LED串的一端的电压电平，并从多个数字 价值观。 集成电路还可以包括耦合到接口电路的转换器，其被配置为将最低数字值转换为控制信号，并将控制信号提供给电源以调节电源的输出电压。
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公开(公告)号：US09350236B2
公开(公告)日：2016-05-24
申请号：US14340292
申请日：2014-07-24
CPC分类号： H02M3/156 , H02M1/08 , H02M3/1588 , Y02B70/1466
摘要： A switching regulator that includes a high-side MOSFET, a low-side MOSFET, a high-side driver circuit, a low-side driver circuit, and a capacitive coupling circuit. An output of the high-side driver circuit is coupled to a gate of the high-side MOSFET to control the high-side MOSFET to be substantially depleted during a first operational phase and to be substantially enhanced during a second operational phase. An output of the low-side driver circuit is coupled to a gate of the low-side MOSFET to control the low-side MOSFET to be substantially enhanced during the first operational phase and to provide a regulated drain-to-source current during the second operational phase. The capacitive coupling circuit is coupled to an input of the high-side driver circuit and the gate of the low-side MOSFET and decreases the regulated drain-to-source current during a transition from the first operational phase to the second operational phase.
摘要翻译： 一种开关稳压器，包括高边MOSFET，低端MOSFET，高侧驱动电路，低侧驱动电路和电容耦合电路。 高侧驱动电路的输出耦合到高侧MOSFET的栅极，以控制高边MOSFET在第一操作阶段期间基本上耗尽，并且在第二操作阶段期间将显着增强。 低侧驱动电路的输出耦合到低侧MOSFET的栅极，以在第一操作阶段期间基本上增强低边MOSFET的控制，并且在第二操作阶段期间提供稳定的漏极 - 源极电流 操作阶段 电容耦合电路耦合到高侧驱动电路的输入端和低侧MOSFET的栅极，并且在从第一操作阶段到第二操作阶段的转变期间减小了调节的漏极 - 源极电流。
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公开(公告)号：US10091845B2
公开(公告)日：2018-10-02
申请号：US15211780
申请日：2016-07-15
摘要： A multiple-chip voltage feedback technique allows multiple strings of Light Emitting Diodes (LED's) and current sinks to be efficiently powered by a DC-to-DC voltage converter. A plurality of controllers connected in a daisy chain series monitor voltages between the connected LED's and the current sinks, progressively determine the lowest voltage, and then feed the lowest voltage back to the voltage converter. The DC-to-DC voltage converter monitors this lowest voltage and adjusts its output in order to ensure that the LED strings have adequate voltage with which to function, even as the LED's have different forward voltages and the strings are asynchronously enabled and disabled.
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公开(公告)号：US09609708B2
公开(公告)日：2017-03-28
申请号：US14987203
申请日：2016-01-04
IPC分类号： 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 that includes multiple intelligent satellite LED driver ICs connected to an interface IC via a serial lighting interface 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.
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公开(公告)号：US20160360144A1
公开(公告)日：2016-12-08
申请号：US15160205
申请日：2016-05-20
IPC分类号： H04N5/57
CPC分类号： H04N5/57 , H05B33/083 , H05B33/0842 , H05B37/0254
摘要： An LED driver IC for driving external strings of LEDs includes 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.
摘要翻译： 用于驱动LED的外部串的LED驱动器IC包括彼此串联连接的前缀寄存器和数据寄存器，以及其他驱动器IC中的前缀和数据寄存器。 驱动器IC的前缀和数据寄存器以菊花链方式连接到接口IC。 接口IC将识别功能锁存器的数据加载到前缀寄存器中，并将定义功能条件的数据加载到每个驱动器IC的数据寄存器中。 然后将数据寄存器中的数据传送到功能锁存器，以控制LED驱动器IC内的功能状态。
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公开(公告)号：US20160330809A1
公开(公告)日：2016-11-10
申请号：US15211780
申请日：2016-07-15
CPC分类号： H05B33/0815 , G05F1/461 , G05F1/565 , H02M3/04 , H05B33/0827 , H05B33/0845
摘要： A multiple-chip voltage feedback technique allows multiple strings of Light Emitting Diodes (LED's) and current sinks to be efficiently powered by a DC-to-DC voltage converter. A plurality of controllers connected in a daisy chain series monitor voltages between the connected LED's and the current sinks, progressively determine the lowest voltage, and then feed the lowest voltage back to the voltage converter. The DC-to-DC voltage converter monitors this lowest voltage and adjusts its output in order to ensure that the LED strings have adequate voltage with which to function, even as the LED's have different forward voltages and the strings are asynchronously enabled and disabled.
摘要翻译： 多芯片电压反馈技术允许多个发光二极管（LED）和电流吸收器由DC-DC电压转换器有效地供电。 连接在菊花链系列中的多个控制器监视所连接的LED和电流吸收器之间的电压，逐渐确定最低电压，然后将最低电压馈送回电压转换器。 直流到直流电压转换器监控这个最低电压并调整其输出，以确保LED串具有足够的电压，即使LED具有不同的正向电压，并且串是异步启用和禁用的。
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公开(公告)号：US20160119990A1
公开(公告)日：2016-04-28
申请号：US14987203
申请日：2016-01-04
IPC分类号： 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 that includes multiple intelligent satellite LED driver ICs connected to an interface IC via a serial lighting interface 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，其包括通过串行照明接口总线连接到接口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。
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