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公开(公告)号：US11539351B1
公开(公告)日：2022-12-27
申请号：US17350855
申请日：2021-06-17
Applicant: NXP B.V.
Abstract: Various embodiments relate to a mode detector configured to determine a mode of a circuit based upon an attached power source, including: a first latch configured to hold an first input value and output the first held value and an inverse of the first held value; a second latch configured to hold a second input value and output the second held value and an inverse of the second held value; a first output switch connected between a first power source line and a power source output of the mode detector, wherein the first output switch is configured to be controlled by the output of the first latch; a second output switch connected between a second power source line and the power source output of the mode detector, wherein the second output switch is configured to be controlled by the output of the second latch; a first AND gate with a first input and a second input connected to the inverse output of the second latch, wherein the first input is configured to receive a first power on reset signal based upon the first power source line; and a second AND gate with a first input and a second input connected to the inverse output of the first latch, wherein the first input is configured to receive a second power on reset signal based upon the second power source line, wherein the mode of the circuit is indicated by the outputs of the first latch and the second latch.
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公开(公告)号：US20170086266A1
公开(公告)日：2017-03-23
申请号：US15260612
申请日：2016-09-09
Applicant: NXP B.V.
CPC classification number: H05B33/083 , H05B33/0815 , H05B33/0842 , H05B33/089 , H05B37/0281
Abstract: Disclosed is a controller for controlling a string of N LEDs connected in series and each having a current bypass switch in parallel therewith and configured to be supplied from a current source connected in series with the string of LEDs and being supplied by a supply voltage, the controller comprising: a respective bypass switch controller for each bypass switch and configured to control the respective bypass switch such that the respective LED has an on-period and an off-period, according to a common duty cycle; a phase control unit configured to set a respective timing of each of the bypass switches such that the fraction of LEDs not bypassed corresponds to the duty cycle; and a duty cycle adjustor configured to adjust the duty cycle, in dependence on the supply voltage. Associated methods and circuits are also disclosed.
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Patent Agency Ranking
13.发明申请Mains Power Converter, a Controller Therefor, and Methods of Operating the same 有权主电源转换器，其控制器及其操作方法公开(公告)号：US20170070136A1
公开(公告)日：2017-03-09
申请号：US15255248
申请日：2016-09-02
Applicant: NXP B.V.
Inventor： Henricus Cornelis Johannes Büthker
CPC classification number: H02M3/04 , H02M1/12 , H02M1/14 , H02M1/15 , H02M1/44 , H02M7/06 , H02M7/2176 , H02M2001/007
Abstract: A power converter, configured to convert AC mains power to a DC output voltage which is lower than the AC mains' peak voltage, is disclosed. It comprises: a capacitor configured to store charge at a voltage range which is intermediate the peak voltage and the DC output voltage; a gated rectification stage comprising a rectifier for rectifying an AC mains power, and at least one switch configured to supply the rectified AC mains power to the capacitor during only a low-voltage part of a half-cycle of the AC mains; and a switched mode DC-DC power conversion stage comprising at least one further switch and configured to convert power from the capacitor to the DC output voltage during only a high-voltage part of the half-cycle. A controller for use in such a converter, and a corresponding method, are also disclosed.
Abstract translation: 公开了一种电力转换器，其被配置为将AC电源转换为低于AC电源峰值电压的DC输出电压。 它包括：电容器，被配置为在高于峰值电压和直流输出电压的电压范围内存储电荷; 选通整流级，其包括用于整流交流电源功率的整流器，以及至少一个开关，其被配置为仅在所述交流电源的半周期的低电压部分期间向所述电容器提供整流的交流电源; 以及包括至少一个另外的开关并且被配置为仅在半周期的高电压部分期间将来自电容器的功率转换为DC输出电压的开关模式DC-DC功率转换级。 还公开了一种用于这种转换器的控制器及相应的方法。
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公开(公告)号：US12278623B2
公开(公告)日：2025-04-15
申请号：US18332522
申请日：2023-06-09
Applicant: NXP B.V.
Inventor： Henricus Cornelis Johannes Büthker , Jyotirmoy Ghosh , Piotr Gibas , Edwin Schapendonk , Neha Goel , Namith Vishnu N
Abstract: One example discloses a power on reset (POR) circuit, wherein a first circuit is configured to un-couple a power supply input from a resistor divider when the voltage on a second end of the capacitor is above a first circuit threshold; a second circuit configured to couple the second end of the capacitor to the power supply input when a voltage on at least one tap point of the resistor divider is above a second circuit threshold; wherein the comparator is coupled to at least one of the tap points, the reference potential, and a POR output; and wherein the comparator is configured to ramp-up a POR signal on the POR output when a voltage on the at least one of the tap points is greater than the comparator threshold.
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公开(公告)号：US09820345B2
公开(公告)日：2017-11-14
申请号：US15270902
申请日：2016-09-20
Applicant: NXP B.V.
Inventor： Henricus Cornelis Johannes Büthker
CPC classification number: H05B33/0815 , B60Q1/14 , B60Q1/1415 , H05B33/083 , H05B33/0845
Abstract: An LED controller, for connecting to an LED string, comprising: an input terminal configured to receive a light-control-signal representative of a received-profile-identifier; a local memory configured to store a plurality of profile-data, wherein each of the plurality of profile-data defines an association between a plurality of light-values and a plurality of sequence-numbers; a processor configured to: determine one of the plurality of profile-data as selected-profile-data in accordance with the received-profile identifier; and determine a set of LED control signals for the LED string in accordance with light-values of the selected-profile-data for a set of sequence-numbers.
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公开(公告)号：US09673657B2
公开(公告)日：2017-06-06
申请号：US14244610
申请日：2014-04-03
Applicant: NXP B.V.
CPC classification number: H02J7/0091 , H02J7/0077
Abstract: Various methods, apparatuses and systems are directed to battery-charging applications. As may be consistent with one or more embodiments discussed herein, a charging current for charging a battery is modulated, and the frequency of the modulated charging current is set based upon an impedance of the battery. Temperature of the battery is estimated based upon the impedance exhibited by the battery, while the battery is charged with the modulated charging current. In various implementations, the battery charging rate is controlled based on the estimated temperature.
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公开(公告)号：US20170086270A1
公开(公告)日：2017-03-23
申请号：US15270902
申请日：2016-09-20
Applicant: NXP B.V.
Inventor： Henricus Cornelis Johannes Büthker
CPC classification number: H05B33/0815 , B60Q1/14 , B60Q1/1415 , H05B33/083 , H05B33/0845
Abstract: An LED controller, for connecting to an LED string, comprising: an input terminal configured to receive a light-control-signal representative of a received-profile-identifier; a local memory configured to store a plurality of profile-data, wherein each of the plurality of profile-data defines an association between a plurality of light-values and a plurality of sequence-numbers; a processor configured to: determine one of the plurality of profile-data as selected-profile-data in accordance with the received-profile identifier; and determine a set of LED control signals for the LED string in accordance with light-values of the selected-profile-data for a set of sequence-numbers.
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