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11.发明授权公开(公告)号：US10924023B2
公开(公告)日：2021-02-16
申请号：US16721181
申请日：2019-12-19
Applicant: Chengdu Monolithic Power Systems Co., Ltd.
Inventor： Yuedong Chen , Haishi Wang , Lin Feng
Abstract: A control circuit having power limit for controlling an AC-DC voltage converter. The control circuit includes a first sensing circuit having an auxiliary winding used to sense a voltage on an inductive element of the converter to generate a first sensing signal, a second sensing circuit used to sense the current flowing through the inductive element to provide a second sensing signal, and a power limit circuit. The power limit circuit generates a power indication signal indicative of the input power of the converter based on the first sensing signal and the second sensing signal. When the power indication signal is larger than a power threshold, a controllable switch of the converter is turned off.
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公开(公告)号：US20210036541A1
公开(公告)日：2021-02-04
申请号：US16927687
申请日：2020-07-13
Applicant: Chengdu Monolithic Power Systems Co., Ltd.
Inventor： Yuedong Chen
Abstract: A discharge circuit for an X capacitor has a first voltage detection circuit providing a first indicating signal based on a voltage across two input terminals of a switching converter to indicate whether the two input terminals are connected to an AC power source, and a discharge module starting a discharge operation on the X capacitor based on first indicating signal, and the discharge operation discharges the X capacitor during a first time period, and stops discharging the X capacitor and compares a sampled signal with the voltage across the two input terminals during a following second time period.
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13.发明授权公开(公告)号：US10224823B2
公开(公告)日：2019-03-05
申请号：US15665354
申请日：2017-07-31
Applicant: Chengdu Monolithic Power Systems Co., Ltd.
Inventor： Yuedong Chen
Abstract: An integrated circuit used for a switching converter has a power supply circuit for providing a power supply voltage, and a control circuit. The switching converter has a switching circuit converting a DC input voltage into an output signal. The power supply circuit has a protection circuit, an UVLO unit and a current source coupled to a power supply capacitor. The protection circuit detects whether the DC input voltage is at a brown-in state. The UVLO unit generates a lock out signal by comparing the power supply voltage with a upper threshold voltage and a lower threshold voltage. The lower threshold voltage is selectively limited to one of a first value or a second value based on the detection. The second value is less than the first value. The current source provides the power supply voltage under the control of the lock out signal.
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14.发明授权LED driving circuit, control circuit and associated current sensing circuit 有权LED驱动电路，控制电路及相关电流检测电路公开(公告)号：US09241381B2
公开(公告)日：2016-01-19
申请号：US14585645
申请日：2014-12-30
Applicant: Chengdu Monolithic Power Systems Co., Ltd.
Inventor： Lin Feng , Yuedong Chen
IPC: H05B33/08
CPC classification number: H05B33/0818
Abstract: A LED driving circuit, a control circuit and associated current sensing circuit. The control circuit has a sensing circuit, an estimation circuit, an amplifying circuit, a comparing circuit, a zero-cross detection circuit and a logic circuit. The sensing circuit is configured to sense a switching current flowing through at least one switch of a switching circuit to provide a first sensing signal. The estimation circuit is configured to process the first sensing signal to provide a feedback signal, wherein the feedback signal is indicative of a average current signal flowing through a LED. An average current flowing through the LED is regulated by sensing a switching current flowing through at least one switch.
Abstract translation: LED驱动电路，控制电路和相关电流检测电路。 控制电路具有感测电路，估计电路，放大电路，比较电路，零交叉检测电路和逻辑电路。 感测电路被配置为感测流过开关电路的至少一个开关的开关电流以提供第一感测信号。 估计电路被配置为处理第一感测信号以提供反馈信号，其中反馈信号指示流过LED的平均电流信号。 通过感测流过至少一个开关的开关电流来调节流过LED的平均电流。
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公开(公告)号：US20150257219A1
公开(公告)日：2015-09-10
申请号：US14644068
申请日：2015-03-10
Applicant: Chengdu Monolithic Power Systems Co., Ltd.
Inventor： Lin Feng , Yuedong Chen
CPC classification number: H05B33/0815 , H03K21/023 , H03K21/026 , H05B37/0281 , Y02B20/348 , Y02B20/42
Abstract: A timing circuit used in lighting systems includes a first logic circuit, a first counter, a latching circuit and a judging circuit. The first logic circuit generates a first logic signal and a second logic signal based on a falling edge of a detecting signal. The first counter generates a first counting signal and a second counting signal based on the second logic signal, wherein the counting period of the first counting signal is longer than that of the second counting signal. The latching circuit samples and holds the first counting signal based on the first logic signal and provides a third counting signal. The judging circuit detects whether the second counting signal is equal to the third counting signal and provides a timing signal.
Abstract translation: 在照明系统中使用的定时电路包括第一逻辑电路，第一计数器，锁存电路和判断电路。 第一逻辑电路基于检测信号的下降沿产生第一逻辑信号和第二逻辑信号。 第一计数器基于第二逻辑信号产生第一计数信号和第二计数信号，其中第一计数信号的计数周期长于第二计数信号的计数周期。 锁存电路基于第一逻辑信号采样并保持第一计数信号并提供第三计数信号。 判断电路检测第二计数信号是否等于第三计数信号并提供定时信号。
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Patent Agency Ranking
16.发明申请公开(公告)号：US20250007320A1
公开(公告)日：2025-01-02
申请号：US18755984
申请日：2024-06-27
Applicant: Chengdu Monolithic Power Systems Co., Ltd.
Inventor： Junlin Qian , Yuedong Chen
Abstract: A control circuit for controlling a power supply voltage is provided. The control circuit includes a charging control circuit and a charging current source. The charging control circuit provides a charging control signal based on an input voltage and the power supply voltage. The charging current source receives the input voltage and provides a charging current to a power supply capacitor for generating the power supply voltage based on the charging control signal. In a charging window, the charging control signal controls the charging current source to start providing the charging current for charging the power supply capacitor after a first time-interval from a start point of the charging window. The charging control signal controls the charging current source to stop providing the charging current when the power supply voltage increases to a charging stop reference voltage. A continuous time duration of providing the charging current is a charging period.
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公开(公告)号：US20210175790A1
公开(公告)日：2021-06-10
申请号：US17113214
申请日：2020-12-07
Applicant: Chengdu Monolithic Power Systems Co., Ltd.
Inventor： Jiayou Ye , Yuedong Chen , Hui Li
IPC: H02M1/08
Abstract: A driving circuit for driving a synchronous rectifier device. The driving circuit may include a controllable charging circuit and a slope sensing circuit. The slope sensing circuit may sense whether an abrupt rising change in a voltage drop from a sensing terminal to a reference ground terminal of the driving circuit is occurring, and provide a slope sensing signal in response to a rising edge of the abrupt rising change in the voltage drop. The controllable charging circuit may receive the slope sensing signal and provide a charging current to a supply terminal of the driving circuit in response to each rising edge of the abrupt rising change in the voltage drop.
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公开(公告)号：US20210028698A1
公开(公告)日：2021-01-28
申请号：US16928257
申请日：2020-07-14
Applicant: Chengdu Monolithic Power Systems Co., Ltd.
Inventor： Yuedong Chen
Abstract: A switching mode power supply preventing a first switch from being falsely triggered. The switching mode power supply detects a peak of an input signal and starts timing a period of time since the arrival of the peak of the input signal is detected. The first switch starts performing the on and off switching operations when the period of time expires.
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公开(公告)号：US20170093296A1
公开(公告)日：2017-03-30
申请号：US15272418
申请日：2016-09-21
Applicant: Chengdu Monolithic Power Systems Co., Ltd.
Inventor： Yuedong Chen
CPC classification number: H02M3/33546 , H02M1/088 , H02M3/3376 , H02M2001/0009 , H02M2001/0058 , Y02B70/1433 , Y02B70/1491
Abstract: A control circuit used for controlling a resonant converter. The control circuit has a setting capacitor, N up thresholds and N low thresholds. If the resonant converter operates in the inductive mode, a setting voltage signal across the setting capacitor is respectively compared with the largest one of the N up thresholds and the smallest one of the N low thresholds in each operation cycle to generate a high-side control signal and a low-side control signal for controlling a high-side switch and a low-side switch of the resonant converter. If the resonant converter enters into the capacitive mode, the setting voltage signal is respectively compared with each of the N up thresholds and each of the N low thresholds operation cycle by operation cycle to generate the high-side control signal and the low-side control signal.
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公开(公告)号：US09420648B2
公开(公告)日：2016-08-16
申请号：US14644068
申请日：2015-03-10
Applicant: Chengdu Monolithic Power Systems Co., Ltd.
Inventor： Lin Feng , Yuedong Chen
CPC classification number: H05B33/0815 , H03K21/023 , H03K21/026 , H05B37/0281 , Y02B20/348 , Y02B20/42
Abstract: A timing circuit used in lighting systems includes a first logic circuit, a first counter, a latching circuit and a judging circuit. The first logic circuit generates a first logic signal and a second logic signal based on a falling edge of a detecting signal. The first counter generates a first counting signal and a second counting signal based on the second logic signal, wherein the counting period of the first counting signal is longer than that of the second counting signal. The latching circuit samples and holds the first counting signal based on the first logic signal and provides a third counting signal. The judging circuit detects whether the second counting signal is equal to the third counting signal and provides a timing signal.
Abstract translation: 在照明系统中使用的定时电路包括第一逻辑电路，第一计数器，锁存电路和判断电路。 第一逻辑电路基于检测信号的下降沿产生第一逻辑信号和第二逻辑信号。 第一计数器基于第二逻辑信号产生第一计数信号和第二计数信号，其中第一计数信号的计数周期长于第二计数信号的计数周期。 锁存电路基于第一逻辑信号采样并保持第一计数信号并提供第三计数信号。 判断电路检测第二计数信号是否等于第三计数信号并提供定时信号。
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