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公开(公告)号：US10044254B2
公开(公告)日：2018-08-07
申请号：US15371058
申请日：2016-12-06
发明人： Xiangkun Zhai , Yunchao Zhang , Jun Zhou , Lieyi Fang
IPC分类号： H02M3/335 , H02M1/08 , H03K3/012 , H03K17/56 , H03K7/08 , H03K17/16 , H03K17/723 , H02M1/36 , H05B33/08 , H02M1/00
摘要： Systems and methods are provided for regulating a power conversion system. An example system controller includes a first controller terminal and a second controller terminal. The first controller terminal is configured to receive a first signal associated with an input signal for a primary winding of a power conversation system. The second controller terminal is configured to output a drive signal to a switch to affect a first current flowing through the primary winding of the power conversion system, the drive signal being associated with an on-time period, the switch being closed during the on-time period. The system controller is configured to adjust a duration of the on-time period based on at least information associated with the first signal.
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公开(公告)号：US09967941B2
公开(公告)日：2018-05-08
申请号：US14743238
申请日：2015-06-18
发明人： Xiangkun Zhai , Liqiang Zhu , Qiang Luo
IPC分类号： H05B33/08
CPC分类号： H05B33/0854
摘要： Systems and methods are provided for regulating one or more currents. An example system controller includes: a thermal detector configured to detect a temperature associated with the system controller and generate a thermal detection signal based at least in part on the detected temperature; and a modulation-and-driver component configured to receive the thermal detection signal and generate a drive signal based at least in part on the thermal detection signal to close or open a switch to affect a drive current associated with one or more light emitting diodes. The modulation-and-driver component is further configured to, in response to the detected temperature increasing from a first temperature threshold but remaining smaller than a second temperature threshold, generate the drive signal to keep the drive current at a first current magnitude, the second temperature threshold being higher than the first temperature threshold.
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公开(公告)号：US09825542B2
公开(公告)日：2017-11-21
申请号：US14970667
申请日：2015-12-16
发明人： Xiaomin Huang , Yuan Lin , Huawei Lyu , Lieyi Fang
IPC分类号： H02M3/335
CPC分类号： H02M3/33523
摘要： Systems and methods are provided for regulating a power converter. An example system controller includes: a first controller terminal configured to output a drive signal to a switch to affect a current flowing through a primary winding of a power converter, the drive signal being associated with a switching period corresponding to a switching frequency; and a second controller terminal configured to receive a feedback signal associated with an output voltage related to a secondary winding of the power converter. The first controller terminal is further configured to: output the drive signal to close the switch during the on-time period; and output the drive signal to open the switch during the off-time period. The system controller is configured to set the switching frequency to one or more frequency magnitudes, each of the one or more frequency magnitudes being smaller than or equal to an upper frequency limit.
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公开(公告)号：US09768777B2
公开(公告)日：2017-09-19
申请号：US14243827
申请日：2014-04-02
发明人： Chao Yao , Tingzhi Yuan , Qiang Luo , Zhiliang Chen , Lieyi Fang
IPC分类号： H03L5/00 , H03K19/0175
CPC分类号： H03K19/0175 , H03K19/017527 , H03K2217/0063 , H03K2217/0081
摘要： System and method for controlling one or more switches. The system includes a first converting circuit, a second converting circuit, and a signal processing component. The first converting circuit is configured to convert a first current and generate a first converted voltage signal based on at least information associated with the first current. The second converting circuit is configured to convert a second current and generate a second converted voltage signal based on at least information associated with the second current. The signal processing component is configured to receive the first converted voltage signal and the second converted voltage signal and generate an output signal based on at least information associated with the first converted voltage signal and the second converted voltage signal.
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公开(公告)号：US09722497B2
公开(公告)日：2017-08-01
申请号：US14830603
申请日：2015-08-19
发明人： Lieyi Fang , Chao Yao , Xiuhong Zhang , Yunchao Zhang
CPC分类号： H02M3/33523 , H02M1/08 , H02M3/33507 , H02M2001/0009
摘要： Systems and methods are provided for regulating a power conversion system. An example system controller includes a driving component and a detection component. The driving component is configured to output a driving signal to a switch associated with a first current flowing through a primary winding of a power conversion system, the switch including a first switch terminal related to a first voltage and a second switch terminal related to a second voltage, the driving signal being associated with a plurality of switching periods. The detection component is configured to receive an input signal associated with a difference between the first voltage and the second voltage, detect at least one valley of the input signal in magnitude during a detection period for the first switching period, and output a detection signal based on at least information associated with the input signal to affect the driving signal.
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公开(公告)号：US09722495B2
公开(公告)日：2017-08-01
申请号：US13784489
申请日：2013-03-04
发明人： Yunchao Zhang , Lieyi Fang
IPC分类号： H02M3/335
CPC分类号： H02M3/33507
摘要： System and method for regulating a power conversion system. An example system controller includes a signal processing component and a driving component. The signal processing component is configured to receive a feedback signal associated with an output signal of a power conversion system and generate a processed signal based on at least information associated with the feedback signal. The driving component is configured to generate a drive signal based on at least information associated with the processed signal and output the drive signal to a switch in order to affect a primary current flowing through a primary winding, the drive signal being associated with a demagnetization period corresponding to a demagnetization process of the power conversion system. The signal processing component is further configured to, sample and hold the feedback signal a plurality of times during the demagnetization period to generate a plurality of sampled and held signals.
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公开(公告)号：US09692306B2
公开(公告)日：2017-06-27
申请号：US14604819
申请日：2015-01-26
发明人： Yuan Lin , Zhiqiang Sun , Weihua Wang , Lieyi Fang
IPC分类号： H02M3/335
CPC分类号： H02M3/33507 , H02M3/325 , H02M3/335 , H02M3/33569
摘要： Systems and methods are provided for voltage regulation of power conversion systems. An example system controller includes: a first sampling component configured to sample a sensing signal and determine a compensation signal based on at least in part on the sensing signal, the sensing signal being associated with a first current flowing through a primary winding of a power conversion system; a signal processing component configured to receive a feedback signal and the compensation signal and generate a first signal based at least in part on the feedback signal and the compensation signal, the feedback signal being associated with an auxiliary winding coupled with a secondary winding of the power conversion system; an error amplifier configured to receive the first signal and a reference signal and generate an amplified signal based at least in part on the first signal and the reference signal.
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公开(公告)号：US09685919B2
公开(公告)日：2017-06-20
申请号：US14678136
申请日：2015-04-03
发明人： Tingzhi Yuan , Zibin Chen , Lieyi Fang
CPC分类号： H03F3/68 , H03F1/0205 , H03F3/185 , H03F3/217 , H03F3/2173 , H03F3/2175 , H03F3/45475 , H03F2200/03 , H03F2200/351
摘要： Systems and methods are provided for amplifying multiple input signals to generate multiple output signals. An example system includes: a first channel configured to receive a first input signal and a second input signal and generate a first output signal and a second output signal based at least in part on the first input signal and the second input signal; and a second channel configured to receive a third input signal and a fourth input signal and generate a third output signal and a fourth output signal based at least in part on the third input signal and the fourth input signal. A first differential signal is equal to the first input signal minus the second input signal. A second differential signal is equal to the third input signal minus the fourth input signal. The first output signal corresponds to a first phase.
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公开(公告)号：US09647448B2
公开(公告)日：2017-05-09
申请号：US13900430
申请日：2013-05-22
发明人： Lieyi Fang , Shifeng Zhao , Bo Li , Zhiliang Chen
CPC分类号： H02H7/1203 , H02H7/12
摘要： System and method for protecting a power converter. A system includes a threshold generator configured to generate a threshold signal, and a first comparator configured to receive the threshold signal and a first signal and to generate a comparison signal. The first signal is associated with an input current for a power converter. Additionally, the system includes a pulse-width-modulation generator configured to receive the comparison signal and generate a modulation signal in response to the comparison signal, and a switch configured to receive the modulation signal and adjust the input current for the power converter. The threshold signal is associated with a threshold magnitude as a function of time. The threshold magnitude increases with time at a first slope during a first period, and the threshold magnitude increases with time at a second slope during a second period. The first slope and the second slope are different.
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60.发明授权Systems and methods for regulating output currents of power conversion systems 有权用于调节电力转换系统输出电流的系统和方法公开(公告)号：US09584005B2
公开(公告)日：2017-02-28
申请号：US14817081
申请日：2015-08-03
发明人： Lieyi Fang , Jun Zhou , Qian Fang
CPC分类号： H02M3/33507 , H02M1/08 , H02M3/33523 , H02M2001/0006 , H02M2001/0009 , H03K7/08 , H03K17/16 , H03K17/56 , H03K17/723 , H05B33/0806 , H05B33/0815
摘要： Systems and methods are provided for regulating a power conversion system. An example system controller includes: a signal generator configured to receive a converted signal and a first compensation signal and generate a second compensation signal based at least in part on the converted signal and the first compensation signal, the converted signal being associated with an input signal for a power conversion system; a modulation component configured to receive the second compensation signal and a ramping signal and generate a modulation signal based at least in part on the second compensation signal and the ramping signal; and a drive component configured to receive the modulation signal and output a drive signal based at least in part on the modulation signal to a switch to affect the first current, the drive signal being associated with an on-time period, the switch being closed during the on-time period.
摘要翻译： 提供了用于调节功率转换系统的系统和方法。 示例性系统控制器包括：信号发生器，被配置为接收转换的信号和第一补偿信号，并且至少部分地基于转换的信号和第一补偿信号产生第二补偿信号，转换的信号与输入信号相关联 用于电力转换系统; 调制部件，被配置为接收第二补偿信号和斜坡信号，并且至少部分地基于第二补偿信号和斜坡信号产生调制信号; 以及驱动部件，被配置为接收所述调制信号并且至少部分地基于所述调制信号将驱动信号输出到开关以影响所述第一电流，所述驱动信号与导通时间周期相关联，所述开关在 准时期。
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