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1.发明公开公开(公告)号：US20240178750A1
公开(公告)日：2024-05-30
申请号：US18499155
申请日：2023-10-31
发明人： PENGLIN YANG , YUAN LIN
CPC分类号： H02M3/01 , H02M1/0003 , H02M3/335 , H02M3/33507
摘要： Controller and method for a quasi-resonant switching power supply. For example, a controller for a quasi-resonant switching power supply includes: a valley detector configured to receive a voltage signal, detect one or more voltage valleys of the voltage signal in magnitude, and generate a detection signal representing the detected one or more voltage valleys; a valley-locking controller configured to receive one or more signals, generate a mode control signal that indicates a selected valley-locking mode based at least in part on the one or more signals, select from the detected one or more voltage valleys, one or more valleys that correspond to the selected valley-locking mode, and generate a valley control signal indicating the one or more selected valleys; and a gate driver configured to generate a drive signal based on at least information associated with the valley control signal.
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公开(公告)号：US20220294355A1
公开(公告)日：2022-09-15
申请号：US17689860
申请日：2022-03-08
发明人： YUAN LIN , PENGLIN YANG , DONGZE YANG , LIEYI FANG
摘要： Controller and method for a switching power supply. For example, a controller for a switching power supply includes: a first terminal configured to receive a feedback voltage representing an output voltage associated with a secondary winding of the switching power supply; a second terminal configured to output a drive voltage to a first transistor associated with a primary winding coupled to the secondary winding of the switching power supply; a comparator configured to receive the feedback voltage and a predetermined feedback threshold and generate a comparison signal based at least in part on the feedback voltage and the predetermined feedback threshold; a pulse-width detector configured to detect a pulse width of the drive voltage during a first switching cycle, compare the detected pulse width with a predetermined time threshold, and generate a detection signal based at least in part on the detected pulse width and the predetermined time threshold.
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3.发明申请公开(公告)号：US20190260294A1
公开(公告)日：2019-08-22
申请号：US16281404
申请日：2019-02-21
发明人： YUAN LIN , XIAOMIN HUANG , QIANG LUO , LIEYI FANG
IPC分类号： H02M3/335
摘要： System and method for regulating a power conversion system. A system controller for regulating a power conversion system includes an operation-mode-selection component and a driving component. The operation-mode-selection component is configured to receive a first signal related to an output load of the power conversion system and a second signal related to an input signal received by the power conversion system and output a mode-selection signal based on at least information associated with the first signal and the second signal. The driving component is configured to receive the mode-selection signal and generate a drive signal based on at least information associated with the mode-selection signal, the driving signal corresponding to a switching frequency.
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公开(公告)号：US20180091060A1
公开(公告)日：2018-03-29
申请号：US15724062
申请日：2017-10-03
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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5.发明申请公开(公告)号：US20200044563A1
公开(公告)日：2020-02-06
申请号：US16456909
申请日：2019-06-28
发明人： YUAN LIN , LIEYI FANG
摘要： System and method are provided for regulating a power converter. The system includes a signal processing component configured to receive a first input signal and a second input signal, process information associated with the first input signal and the second input signal, and output a drive signal to a switch based on at least information associated with the first input signal and the second input signal. The first input signal is associated with at least a feedback signal related to an output voltage of the power converter. The second input signal is associated with at least a primary current flowing through a primary winding of the power converter. The signal processing component is further configured to change a peak value of the primary current within a first predetermined range, and change the switching frequency of the power converter within a second predetermined range.
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6.发明申请公开(公告)号：US20190013738A1
公开(公告)日：2019-01-10
申请号：US16014685
申请日：2018-06-21
发明人： YUAN LIN , Xiaomin Huang , Qiang Luo , Lieyi Fang
摘要： System and method for regulating a power conversion system. A system controller for regulating a power conversion system includes an operation-mode-selection component and a driving component. The operation-mode-selection component is configured to receive a first signal related to an output load of the power conversion system and a second signal related to an input signal received by the power conversion system and output a mode-selection signal based on at least information associated with the first signal and the second signal. The driving component is configured to receive the mode-selection signal and generate a drive signal based on at least information associated with the mode-selection signal, the driving signal corresponding to a switching frequency.
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7.发明申请公开(公告)号：US20180069479A1
公开(公告)日：2018-03-08
申请号：US15711867
申请日：2017-09-21
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：US20240322695A1
公开(公告)日：2024-09-26
申请号：US18605047
申请日：2024-03-14
发明人： QIAN FANG , YUN SUN , TUOFU LIU , XIUHONG ZHANG , YUAN LIN
CPC分类号： H02M3/33515 , H02M1/0009 , H02M1/0058 , H02M3/33523
摘要： Controller and method for a power converter. For example, a controller for a power converter includes: a first drive signal generator configured to generate a first drive signal to turn off a first transistor at a first time and turn on the first transistor at a second time, the first transistor being configured to receive an input voltage and related to a primary winding coupled to an auxiliary winding and a secondary winding, the secondary winding being related to an output voltage, the second time being later than the first time; a second drive signal generator configured to generate a second drive signal to turn on a second transistor at a third time, the second transistor being coupled to the first transistor and related to the primary winding, the third time being later than the first time and being earlier than the second time.
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9.发明公开公开(公告)号：US20230396170A1
公开(公告)日：2023-12-07
申请号：US18131788
申请日：2023-04-06
发明人： PENGLIN YANG , XIAOMIN HUANG , YUAN LIN , YUN SUN
CPC分类号： H02M3/33523 , H02M1/08 , H02M1/36 , H02M1/44
摘要： Controller and method for a power converter. For example, the controller includes: a first terminal configured to receive a first voltage; a second terminal connected to a capacitor and biased to a second voltage; a voltage detector configured to receive the second voltage from the second terminal and generate a detection signal based at least in part on the second voltage; a charging controller configured to receive the detection signal and generate a first control signal based at least in part on the detection signal; and a charging current generator configured to receive the first voltage from the first terminal and receive the first control signal from the charging controller; wherein the voltage detector is further configured to: detect that the second voltage has decreased to a first predetermined threshold; and generate the detection signal indicating that the second voltage has decreased to the first predetermined threshold.
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10.发明申请公开(公告)号：US20180109195A1
公开(公告)日：2018-04-19
申请号：US15835337
申请日：2017-12-07
发明人： YUAN LIN , Xiaomin Huang , Qiang Luo , Lieyi Fang
IPC分类号： H02M3/335
CPC分类号： H02M3/33507 , H02M3/335 , H02M2001/0009 , H02M2001/0032 , Y02B70/16
摘要： System and method for regulating a power conversion system. A system controller for regulating a power conversion system includes an operation-mode-selection component and a driving component. The operation-mode-selection component is configured to receive a first signal related to an output load of the power conversion system and a second signal related to an input signal received by the power conversion system and output a mode-selection signal based on at least information associated with the first signal and the second signal. The driving component is configured to receive the mode-selection signal and generate a drive signal based on at least information associated with the mode-selection signal, the driving signal corresponding to a switching frequency.
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