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公开(公告)号：US20150357908A1
公开(公告)日：2015-12-10
申请号：US14296216
申请日：2014-06-04
Applicant: Cree, Inc.
Inventor： Ashish Ekbote
CPC classification number: H05B33/0815 , H02M1/4225 , H02M3/156 , Y02B20/346 , Y02B70/126
Abstract: A switched mode power supply may include circuitry configured to output a bias signal that turns off and on switching circuitry of the switched mode power supply. The circuitry may wait for a first time period determined by the bias signal, and output the bias signal to turn off the switching circuitry when the time period expires. In addition or alternatively, the circuitry may begin waiting for a second time period when the bias signal turns off the switching circuitry. The circuitry may turn on the switching circuitry either when energy in inductive storage circuitry is depleted or when the second time period expires.
Abstract translation: 开关模式电源可以包括被配置为输出偏置信号的电路，所述偏置信号关断和开关模式电源的开关电路。 电路可以等待由偏置信号确定的第一时间段，并且当时间段到期时输出偏置信号以关断开关电路。 另外或替代地，当偏置信号关断开关电路时，电路可以开始等待第二时间段。 当电感性存储电路中的能量耗尽时或者当第二时间段到期时，该电路可以导通开关电路。
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公开(公告)号：US20140265895A1
公开(公告)日：2014-09-18
申请号：US13795462
申请日：2013-03-12
Applicant: CREE, INC.
Inventor： Ashish Ekbote
CPC classification number: H02M1/126 , H02M3/156 , H02M2001/0064 , H05B33/0815
Abstract: A converter circuit includes an input filter including an input capacitor configured to filter electromagnetic interference from an input voltage. The converter circuit includes an output capacitor, a first inductor coupled to the input capacitor, a switch coupled to the first inductor and configured to control a level of current flowing in the first inductor, a coupling capacitor connected to the first inductor, and an output rectifier coupled between the coupling capacitor and the output capacitor. A damping circuit that is configured to damp a resonant frequency of the converter circuit is coupled in parallel with the coupling capacitor.
Abstract translation: A转换器电路包括输入滤波器，其包括被配置为滤波来自输入电压的电磁干扰的输入电容器。 转换器电路包括输出电容器，耦合到输入电容器的第一电感器，耦合到第一电感器并被配置为控制在第一电感器中流动的电流的电平，连接到第一电感器的耦合电容器和输出端 整流器耦合在耦合电容器和输出电容器之间。 被配置为抑制转换器电路的谐振频率的阻尼电路与耦合电容并联耦合。
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公开(公告)号：US20180139811A1
公开(公告)日：2018-05-17
申请号：US15352062
申请日：2016-11-15
Applicant: Cree, Inc.
Inventor： Ashish Ekbote , Noe Gonzalez
Abstract: A method of operating a switching power converter includes operating the switching power converter in a boundary conduction mode when a switching frequency of a switch in the switching power converter is below a switching frequency threshold such than an on time of the switch is adjusted based on a desired output power of the switching power converter, and operating the switching power converter in a discontinuous conduction mode when the switching frequency of the switch is above the switching frequency threshold such that one or more of the on time of the switch and a switching period of the switch are adjusted based on the desired output power of the switching power converter and the on time of the switch is clamped at a minimum switch on time.
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公开(公告)号：US09681507B2
公开(公告)日：2017-06-13
申请号：US14553004
申请日：2014-11-25
Applicant: Cree, Inc.
Inventor： Ihor Lys , Ashish Ekbote
IPC: H05B33/08
CPC classification number: H05B33/0815 , H05B33/0848 , Y02B20/346
Abstract: An apparatus includes a switched-mode converter circuit having an output configured to be coupled to at least one light-emitting device. The apparatus further includes a control circuit configured to generate a measure of a voltage magnitude of a time-varying voltage applied to an input of the switched-mode converter circuit and a measure of a dimming level to be applied to the at least one light-emitting device. The control circuit is configured to control a switch of the switched-mode converter circuit responsive to the generated measures. The control circuit may be implemented using functional units of a microcontroller.
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公开(公告)号：US09655175B2
公开(公告)日：2017-05-16
申请号：US14296216
申请日：2014-06-04
Applicant: Cree, Inc.
Inventor： Ashish Ekbote
CPC classification number: H05B33/0815 , H02M1/4225 , H02M3/156 , Y02B20/346 , Y02B70/126
Abstract: A switched mode power supply may include circuitry configured to output a bias signal that turns off and on switching circuitry of the switched mode power supply. The circuitry may wait for a first time period determined by the bias signal, and output the bias signal to turn off the switching circuitry when the time period expires. In addition or alternatively, the circuitry may begin waiting for a second time period when the bias signal turns off the switching circuitry. The circuitry may turn on the switching circuitry either when energy in inductive storage circuitry is depleted or when the second time period expires.
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Patent Agency Ranking
公开(公告)号：US20150267879A1
公开(公告)日：2015-09-24
申请号：US14219627
申请日：2014-03-19
Applicant: Cree, Inc.
Inventor： Kurt Wilcox , Bernd Keller , James Ibbetson , Ashish Ekbote
IPC: F21K99/00
CPC classification number: F21K9/56 , F21K9/27 , F21K9/60 , F21K9/64 , F21Y2103/10 , F21Y2113/17 , F21Y2115/10
Abstract: A LED lamp includes a plurality of red LEDs and a plurality of blue LEDs, a phosphor covering at least the plurality of blue LEDs, where the lamp has an LPW of at least 200 in a steady state operation.
Abstract translation: LED灯包括多个红色LED和多个蓝色LED，至少覆盖多个蓝色LED的荧光体，其中灯在稳态操作中具有至少200的LPW。
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公开(公告)号：US20150257216A1
公开(公告)日：2015-09-10
申请号：US14553004
申请日：2014-11-25
Applicant: Cree, Inc.
Inventor： Ihor Lys , Ashish Ekbote
CPC classification number: H05B33/0815 , H05B33/0848 , Y02B20/346
Abstract: An apparatus includes a switched-mode converter circuit having an output configured to be coupled to at least one light-emitting device. The apparatus further includes a control circuit configured to generate a measure of a voltage magnitude of a time-varying voltage applied to an input of the switched-mode converter circuit and a measure of a dimming level to be applied to the at least one light-emitting device. The control circuit is configured to control a switch of the switched-mode converter circuit responsive to the generated measures. The control circuit may be implemented using functional units of a microcontroller.
Abstract translation: 一种装置包括具有被配置为耦合到至少一个发光装置的输出的开关模式转换器电路。 该装置还包括控制电路，该控制电路被配置为产生施加到开关模式转换器电路的输入端的时变电压的电压幅度的量度，以及施加到至少一个发光二极管的调光电平的量度， 发光装置。 控制电路被配置为响应于所产生的措施来控制开关模式转换器电路的开关。 控制电路可以使用微控制器的功能单元来实现。
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公开(公告)号：US09504105B2
公开(公告)日：2016-11-22
申请号：US14296196
申请日：2014-06-04
Applicant: Cree, Inc.
Inventor： Ashish Ekbote , Mike Walters
CPC classification number: H05B33/0815 , H02M1/4225 , H02M1/4258 , H02M3/156 , H02M3/158 , H02M7/217 , H02M7/2176 , H02M2001/0025 , Y02B20/346 , Y02B70/126
Abstract: A switched mode power supply may include circuitry configured to output a bias signal that turns off and on switching circuitry of the switched mode power supply. The circuitry may wait for a first time period determined by the bias signal, and output the bias signal to turn off the switching circuitry when the time period expires. In addition or alternatively, the circuitry may begin waiting for a second time period when the bias signal turns off the switching circuitry. The circuitry may turn on the switching circuitry either when energy in inductive storage circuitry is depleted or when the second time period expires.
Abstract translation: 开关模式电源可以包括被配置为输出偏置信号的电路，所述偏置信号关断和开关模式电源的开关电路。 电路可以等待由偏置信号确定的第一时间段，并且当时间段到期时输出偏置信号以关断开关电路。 另外或替代地，当偏置信号关断开关电路时，电路可以开始等待第二时间段。 当电感性存储电路中的能量耗尽时或者当第二时间段到期时，该电路可以导通开关电路。
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公开(公告)号：US09303823B2
公开(公告)日：2016-04-05
申请号：US14292001
申请日：2014-05-30
Applicant: Cree, Inc.
Inventor： Qingcong Hu , Ashish Ekbote
IPC: H05B37/02 , F21K99/00 , F21V29/503 , F21V23/00 , F21V23/06 , F21V7/00 , F21V3/00 , H01R43/00 , H05B33/08 , F21Y101/02 , F21W131/10
CPC classification number: F21K9/20 , F21K9/23 , F21K9/64 , F21S8/088 , F21V3/00 , F21V7/0066 , F21V14/04 , F21V17/02 , F21V23/007 , F21V23/06 , F21V29/503 , F21V29/773 , F21W2131/10 , F21W2131/103 , F21Y2101/00 , F21Y2107/30 , F21Y2115/10 , H01R43/00 , H05B33/08 , H05B33/0815 , H05B33/0827 , H05B33/0848 , H05B33/089 , Y02B20/341 , Y02B20/347
Abstract: A SEPIC driver circuit with low input current ripple is disclosed. Embodiments of the present invention provide a driver circuit that accommodates universal input, has a wide output voltage range and good efficiency. An LED lighting system using such as circuit is also disclosed. In at least some embodiments, the circuit is configured as a single-ended primary inductor converter circuit using a magnetic element, and a floating capacitor is connected between the input winding and the output winding of the magnetic element. In some embodiments, an inductor is also included at the DC input to the circuit. An output rectifier such as a diode can also be connected to the output winding of the magnetic element, and an output capacitor can be connected across the output of the circuit. An FET, a bipolar transistor, or a plurality of FETs can be used as the switching device.
Abstract translation: 公开了具有低输入电流纹波的SEPIC驱动电路。 本发明的实施例提供一种适应通用输入的驱动电路，具有宽的输出电压范围和良好的效率。 还公开了使用诸如电路的LED照明系统。 在至少一些实施例中，电路被配置为使用磁性元件的单端初级电感器转换器电路，并且浮动电容器连接在输入绕组和磁性元件的输出绕组之间。 在一些实施例中，电感器也包括在电路的DC输入端。 诸如二极管的输出整流器也可以连接到磁性元件的输出绕组，并且输出电容器可以跨越电路的输出端连接。 可以使用FET，双极晶体管或多个FET作为开关器件。
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公开(公告)号：US09148048B2
公开(公告)日：2015-09-29
申请号：US13795462
申请日：2013-03-12
Applicant: Cree,Inc.
Inventor： Ashish Ekbote
CPC classification number: H02M1/126 , H02M3/156 , H02M2001/0064 , H05B33/0815
Abstract: A converter circuit includes an input filter including an input capacitor configured to filter electromagnetic interference from an input voltage. The converter circuit includes an output capacitor, a first inductor coupled to the input capacitor, a switch coupled to the first inductor and configured to control a level of current flowing in the first inductor, a coupling capacitor connected to the first inductor, and an output rectifier coupled between the coupling capacitor and the output capacitor. A damping circuit that is configured to damp a resonant frequency of the converter circuit is coupled in parallel with the coupling capacitor.
Abstract translation: A转换器电路包括输入滤波器，其包括被配置为滤波来自输入电压的电磁干扰的输入电容器。 转换器电路包括输出电容器，耦合到输入电容器的第一电感器，耦合到第一电感器并被配置为控制在第一电感器中流动的电流的电平，连接到第一电感器的耦合电容器和输出端 整流器耦合在耦合电容器和输出电容器之间。 被配置为抑制转换器电路的谐振频率的阻尼电路与耦合电容并联耦合。
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