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公开(公告)号：US09185757B2
公开(公告)日：2015-11-10
申请号：US14204727
申请日：2014-03-11
Applicant: NXP B.V.
Inventor： Hendrik Boezen
CPC classification number: H05B33/0815 , Y02B20/346
Abstract: LED driver arrangements are disclosed comprising: an input; a plurality of switched mode boost converters, each connected to the input; and a plurality of outputs, each output having a different voltage and being for driving at least one LED string; wherein each of the plurality of switched mode boost converters is configurable to output of any one of the plurality of outputs. Controllers for such arrangements are also disclosed.
Abstract translation: 公开了一种LED驱动器装置，包括：输入端; 多个开关模式升压转换器，每个连接到输入端; 和多个输出，每个输出具有不同的电压并且用于驱动至少一个LED串; 其中所述多个开关模式升压转换器中的每一个可配置为输出所述多个输出中的任一个。 还公开了用于这种布置的控制器。
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公开(公告)号：US08693528B1
公开(公告)日：2014-04-08
申请号：US13690500
申请日：2012-11-30
Applicant: NXP B.V.
Inventor： Rameswor Shrestha , Hendrik Boezen , Martin Bredius
IPC: H04B1/38
CPC classification number: H04L25/0276
Abstract: In one or more embodiments, a circuit is configured to receive a differential signal from a transmitter that is isolated from the receiver circuit and that includes a common-mode suppression circuit and signal combining circuit coupled to the corresponding lines carrying the differential signals. The common-mode suppression and signal combining circuits are configured to suppress common-mode signals of differential signals communicated on the set of differential signal lines and combine to form of differential-mode components of the differential signals.
Abstract translation: 在一个或多个实施例中，电路被配置为从与接收器电路隔离的发射器接收差分信号，并且包括耦合到承载差分信号的相应线路的共模抑制电路和信号组合电路。 共模抑制和信号组合电路被配置为抑制在该组差分信号线上传送的差分信号的共模信号并且组合成差分信号的差分模式分量的形式。
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公开(公告)号：US09967946B1
公开(公告)日：2018-05-08
申请号：US15677000
申请日：2017-08-14
Applicant: NXP B.V.
Abstract: For an LED lighting application, overshoot-protection circuitry prevents an LED controller, such as a matrix lighting controller (MLC) that controls an array of LEDs, from falsely detecting an open-circuit condition in an LED controlled by the LED controller, by limiting the magnitude of an overshoot voltage (due to long-wire parasitic inductances) from occurring when a switch in the LED controller that is used to control the LED is turned off.
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Patent Agency Ranking
公开(公告)号：US09894733B1
公开(公告)日：2018-02-13
申请号：US15387798
申请日：2016-12-22
Applicant: NXP B.V.
IPC: H05B33/08
CPC classification number: H05B33/083 , H05B37/029
Abstract: Embodiments are provided that include a light emitting diode (LED) controller connectable to a matrix of LEDs. A start code is received via at least one input pin, and a selected curve profile is retrieved from a programmable local memory in response to receipt of the start code, wherein the programmable local memory stores a set of curve profiles, each of which is associated with a different start code. A set of coefficients of a polynomial calculator are initialized to a set of values defined in the selected curve profile, wherein the set of values represent a light output curve. A sequence of light intensity values are calculated according to the polynomial calculator, and at least one pulse width modulation (PWM) signal is generated based on the sequence of light intensity values, wherein the at least one PWM signal controls light output of at least one LED.
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公开(公告)号：US09819264B1
公开(公告)日：2017-11-14
申请号：US15478024
申请日：2017-04-03
Applicant: NXP B.V.
Inventor： Hendrik Boezen
CPC classification number: H02M3/156 , H02M1/08 , H02M1/14 , H02M1/15 , H02M3/155 , H02M2001/0009 , H05B33/0815 , H05B33/0845 , Y02B20/346
Abstract: A controller for a power converter. The power converter comprises a converter-switch and a converter-inductor. The controller comprises a controller-output-terminal configured to provide a switch-control-signal for the converter-switch, a comparator and a delay-block. The comparator can provide a comparator-output-signal that has a comparator-output-state dependent on whether or not a sensed-signal is greater than a reference-signal, wherein the comparator-output-state can take a first-state-value or a second-state-value. The delay-block can: set a time-delay-value based on: (i) a voltage across the converter-inductor; start a timer when the comparator-output-state changes; and cause a change in the switch-control-signal when the timer reaches the time-delay-value.
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公开(公告)号：US09775205B1
公开(公告)日：2017-09-26
申请号：US15442023
申请日：2017-02-24
Applicant: NXP B.V.
Inventor： Chao Peng , Hendrik Boezen
CPC classification number: H05B33/0818 , H02M1/08 , H02M3/156 , H02M2001/0054 , Y02B70/1491
Abstract: A method includes activating a transistor providing current to a load via an inductor based on values stored at a first timer and at a second timer. The second timer is enabled based a value of a current conducted at the inductor and based on a value of a reference current. The transistor is deactivated in response to determining that a measurement of time elapsed at the first timer is a predetermined multiple of the second measurement of time.
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公开(公告)号：US09467060B2
公开(公告)日：2016-10-11
申请号：US13856184
申请日：2013-04-03
Applicant: NXP B.V.
Inventor： Hendrik Boezen
IPC: H02J1/00 , H02M5/293 , H03K19/0175 , H03K19/0185 , H03K17/689
CPC classification number: H02M5/293 , H03K17/689 , H03K19/017509 , H03K19/018521 , Y10T307/406
Abstract: Systems and methods of use relate to a circuit that is designed to detect the state of two control signals, wherein one control signal indicates an ON state for the gate driver and the other control signal indicates an OFF state for the gate driver. The circuit responds to each of the control signals by controlling the gate driver so that it drives an output either high or low. The circuit can also be configured to control the gate driver so that it to drives the output (either high or low) when neither control signal is present.
Abstract translation: 系统和使用方法涉及被设计为检测两个控制信号的状态的电路，其中一个控制信号表示栅极驱动器的导通状态，另一个控制信号表示栅极驱动器的截止状态。 该电路通过控制栅极驱动器来响应每个控制信号，使其驱动高或低的输出。 该电路还可以被配置为控制栅极驱动器，使得它在两个控制信号都不存在时驱动输出（高或低）。
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公开(公告)号：US09204512B2
公开(公告)日：2015-12-01
申请号：US14073541
申请日：2013-11-06
Applicant: NXP B.V.
Inventor： Hendrik Boezen
CPC classification number: H05B33/0848 , H05B33/0815 , H05B33/0818 , H05B33/083 , H05B33/0851 , Y02B20/347
Abstract: An LED control circuit for controlling a current supplied to an LED unit is disclosed. A sense resistor is included for sensing an output current provided from an output node. A comparator circuit is provided for detecting upper and lower thresholds in the output current based on the voltages at ends of the sense resistor, and for controlling a current supply to maintain the current between the thresholds. The comparator circuit comprises a reference current source and reference resistors, for generating upper and lower threshold references. The comparator circuit further comprises a comparator for detecting a mid-range voltage dependent on the output current and deriving a control signal which indicates if the detected voltage is above or below the mid-range voltage. The control signal is used to adjust the reference current source, thereby to vary the upper and lower threshold references to maintain a constant median or average output current.
Abstract translation: 公开了一种用于控制提供给LED单元的电流的LED控制电路。 包括感测电阻器，用于感测从输出节点提供的输出电流。 提供了一个比较器电路，用于根据感测电阻器两端的电压检测输出电流中的上限和下限阈值，并用于控制电流供应以维持阈值之间的电流。 比较器电路包括用于产生上限和下限阈值参考的参考电流源和参考电阻。 比较器电路还包括一个比较器，用于检测取决于输出电流的中档电压，并得出一个控制信号，该控制信号指示检测到的电压是高于还是低于中档电压。 控制信号用于调整参考电流源，从而改变上限和下限阈值参考值，以保持恒定的中值或平均输出电流。
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