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公开(公告)号：US11722068B2
公开(公告)日：2023-08-08
申请号：US17546805
申请日：2021-12-09
Applicant: Chengdu Monolithic Power Systems Co., Ltd.
Inventor： Hui Li , Siran Wang , Lin Feng
CPC classification number: H02M3/33592 , H02M1/38 , H02M3/01 , H02M1/0058 , H02M3/33523
Abstract: A controller of an isolated switching converter having a primary and secondary switch, the controller includes a valley detection circuit for providing a valley pulse signal in response to valleys of a resonant voltage, a pulse frequency modulation circuit for providing a pulse frequency modulation signal based on a feedback signal indicative of an output voltage, a primary on enable circuit for providing a primary on enable signal based on the pulse frequency modulation signal and valley pulse signal, a secondary logic circuit for generating a secondary control signal to control the secondary switch based on a primary off detection signal, a zero cross detection signal and the primary on enable signal, and a primary logic circuit for generating a primary control signal to control the primary switch based on a synchronous signal electrically isolated from the primary on enable signal.
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公开(公告)号：US20220209676A1
公开(公告)日：2022-06-30
申请号：US17546805
申请日：2021-12-09
Applicant: Chengdu Monolithic Power Systems Co., Ltd.
Inventor： Hui Li , Siran Wang , Lin Feng
Abstract: A controller of an isolated switching converter having a primary and secondary switch, the controller includes a valley detection circuit for providing a valley pulse signal in response to valleys of a resonant voltage, a pulse frequency modulation circuit for providing a pulse frequency modulation signal based on a feedback signal indicative of an output voltage, a primary on enable circuit for providing a primary on enable signal based on the pulse frequency modulation signal and valley pulse signal, a secondary logic circuit for generating a secondary control signal to control the secondary switch based on a primary off detection signal, a zero cross detection signal and the primary on enable signal, and a primary logic circuit for generating a primary control signal to control the primary switch based on a synchronous signal electrically isolated from the primary on enable signal.
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公开(公告)号：US10784791B2
公开(公告)日：2020-09-22
申请号：US16442439
申请日：2019-06-14
Applicant: Chengdu Monolithic Power Systems Co. Ltd.
IPC: H02M3/335
Abstract: A driving circuit and driving method for driving a synchronous rectifier. When a drain-source detecting voltage between a drain terminal and a source terminal of the synchronous rectifier reaches a second reference voltage, the driving voltage applied at a gate terminal of the synchronous rectifier is decreased to regulate the drain-source detecting voltage to a first reference voltage. The first reference voltage is lower than the second reference voltage. And when the drain-source detecting voltage reaches an off reference voltage, the synchronous rectifier is turned off.
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公开(公告)号：US10348215B2
公开(公告)日：2019-07-09
申请号：US16103860
申请日：2018-08-14
Applicant: Chengdu Monolithic Power Systems Co., Ltd.
Inventor： Lin Feng
Abstract: A supply voltage generating circuit for generating a supply voltage signal to supply the active elements of an AC-DC voltage converter. The supply voltage generating circuit has a charging switch, a charging diode and a charging capacitor. When a main switch of the AC-DC voltage converter is turned on, the charging switch is turned on. Primary current flows through the charging switch and the main switch to the logic ground. When the main switch is turned off and the voltage across the charging capacitor is smaller than a charging threshold, the charging switch is kept on for a period of time and the primary current flows through the charging switch and the charging diode to the charging capacitor. When the period of time is expired or the supply voltage signal is larger than the charging threshold signal, the charging switch is turned off.
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公开(公告)号：US09282606B1
公开(公告)日：2016-03-08
申请号：US14738680
申请日：2015-06-12
Applicant: Chengdu Monolithic Power Systems Co., Ltd.
Inventor： Naixing Kuang , Jiali Cai , Lin Feng
CPC classification number: H05B33/0815 , H05B33/0845 , Y02B20/348
Abstract: An LED driving apparatus includes a rectifier bridge generating a DC bus voltage, a bus capacitor coupled between the output terminal of the rectifier bridge and a reference ground, a tank element, a first transistor, a second transistor, a free-wheeling switch, an output capacitor, a voltage sensing circuit generating a voltage sensing signal indicative of the DC bus voltage, a bleeding circuit providing a bleeding current for the bus capacitor, and a bleeding control circuit generating a control signal to control the bleeding circuit based on the voltage sensing signal.
Abstract translation: 一种LED驱动装置，包括：产生直流母线电压的整流桥，连接在整流桥的输出端和基准地之间的总线电容，一个储能元件，一第一晶体管，一第二晶体管，一个续流开关， 输出电容器，产生表示直流母线电压的电压感测信号的电压检测电路，为总线电容器提供出血电流的出血电路，以及产生控制信号的出血控制电路，以根据电压感测来控制出血电路 信号。
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Patent Agency Ranking
公开(公告)号：US20190020282A1
公开(公告)日：2019-01-17
申请号：US16022645
申请日：2018-06-28
Applicant: Chengdu Monolithic Power Systems Co., Ltd.
Inventor： Hui Li , Lei Miao , Siran Wang , Lin Feng
CPC classification number: H02M3/33592 , H02M1/08 , Y02B70/1475
Abstract: A synchronous switching converter with an energy storage component and a synchronous rectifier coupled to the energy storage component, having: a secondary control circuit configured to receive a slew rate threshold adjusting signal and a voltage across the synchronous rectifier, and to provide a secondary control signal; wherein the secondary control circuit detects a slew rate of the voltage across the synchronous rectifier, and maintains the synchronous rectifier being off when the slew rate of the voltage across the synchronous rectifier is lower than a slew rate threshold.
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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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8.发明授权公开(公告)号：US09282609B2
公开(公告)日：2016-03-08
申请号：US14738609
申请日：2015-06-12
Applicant: Chengdu Monolithic Power Systems Co., Ltd.
Inventor： Naixing Kuang , Jiali Cai , Lin Feng
CPC classification number: H05B33/0845 , H05B33/0815 , H05B33/0848 , Y02B20/348
Abstract: An LED driving apparatus includes a rectifier bridge generating a DC bus voltage, a bus capacitor coupled between the output terminal of the rectifier bridge and a reference ground, a voltage sensing circuit generating a voltage sensing signal indicative of the DC bus voltage, a bleeding circuit providing a bleeding current for the bus capacitor, a switching converter configured to convert the DC bus voltage into a driving signal to drive an LED, a dimming mode detector detecting whether the LED driving apparatus is coupled to a leading edge dimmer or a trailing edge dimmer based on the voltage sensing signal, and a bleeding control circuit generating a control signal to control the bleeding circuit based on the voltage sensing signal, the leading edge dimming mode signal and the trailing edge dimming mode signal.
Abstract translation: LED驱动装置包括：产生DC总线电压的整流桥，连接在整流桥的输出端与基准地之间的总线电容;产生表示直流母线电压的电压检测信号的电压检测电路; 提供总线电容器的渗流电流;开关转换器，被配置为将DC总线电压转换为驱动信号以驱动LED;调光模式检测器，检测LED驱动装置是否耦合到前沿调光器或后沿调光器 基于电压感测信号，以及出血控制电路，其产生控制信号，以基于电压感测信号，前沿调光模式信号和后沿调光模式信号来控制出血电路。
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9.发明申请公开(公告)号：US20150366018A1
公开(公告)日：2015-12-17
申请号：US14738609
申请日：2015-06-12
Applicant: Chengdu Monolithic Power Systems Co., Ltd.
Inventor： Naixing Kuang , Jiali Cai , Lin Feng
IPC: H05B33/08
CPC classification number: H05B33/0845 , H05B33/0815 , H05B33/0848 , Y02B20/348
Abstract: An LED driving apparatus includes a rectifier bridge generating a DC bus voltage, a bus capacitor coupled between the output terminal of the rectifier bridge and a reference ground, a voltage sensing circuit generating a voltage sensing signal indicative of the DC bus voltage, a bleeding circuit providing a bleeding current for the bus capacitor, a switching converter configured to convert the DC bus voltage into a driving signal to drive an LED, a dimming mode detector detecting whether the LED driving apparatus is coupled to a leading edge dimmer or a trailing edge dimmer based on the voltage sensing signal, and a bleeding control circuit generating a control signal to control the bleeding circuit based on the voltage sensing signal, the leading edge dimming mode signal and the trailing edge dimming mode signal.
Abstract translation: LED驱动装置包括：产生DC总线电压的整流桥，连接在整流桥的输出端与基准地之间的总线电容;产生表示直流母线电压的电压检测信号的电压检测电路; 提供总线电容器的渗流电流;开关转换器，被配置为将DC总线电压转换为驱动信号以驱动LED;调光模式检测器，检测LED驱动装置是否耦合到前沿调光器或后沿调光器 基于电压感测信号，以及出血控制电路，其产生控制信号，以基于电压感测信号，前沿调光模式信号和后沿调光模式信号来控制出血电路。
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公开(公告)号：US11245327B2
公开(公告)日：2022-02-08
申请号：US16851057
申请日：2020-04-16
Applicant: Chengdu Monolithic Power Systems Co., Ltd.
Inventor： Lin Feng , Yuedong Chen
Abstract: A driving circuit for driving a synchronous rectifier device. The driving circuit may include a controllable clamping circuit having a first terminal coupled to a sensing terminal of the driving circuit, a second terminal coupled to a reference ground terminal of the driving circuit, a third terminal coupled to a driving terminal of the driving circuit, and a control terminal configured to receive a supply indication signal indicative of a voltage potential at a supply terminal of the driving circuit. The third terminal of the controllable clamping circuit may be connected to the second terminal of the controllable clamping circuit when the supply indication signal indicates that the voltage potential at the supply terminal has not been established to maintain the synchronous rectifier device off.
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