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公开(公告)号：US20230098059A1
公开(公告)日：2023-03-30
申请号：US17487966
申请日：2021-09-28
Applicant: STMicroelectronics S.r.l.
Inventor： Claudio Adragna , Giovanni Gritti
IPC: H05B45/375
Abstract: In an embodiment, a control circuit includes: an output terminal configured to be coupled to a control terminal of a transistor that is coupled to an inductor; a logic circuit configured to control the transistor using a first signal; a zero crossing detection circuit configured to generate a freewheeling signal indicative of a demagnetization of the inductor; a comparator having first and second inputs configured to receive a sense voltage indicative of a current flowing through the transistor and a reference voltage, respectively, and an output configured to cause the logic circuit to dessert the first signal; and a reference generator configured to generate the reference voltage and including: a current generator, a capacitor and a resistor coupled to the output of the reference generator, and a switch coupled in series with the resistor and configured to be controlled based on the first signal and the freewheeling signal.
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32.发明授权公开(公告)号：US10727734B2
公开(公告)日：2020-07-28
申请号：US15916697
申请日：2018-03-09
Applicant: STMicroelectronics S.r.l.
Inventor： Giovanni Gritti
Abstract: A control unit for a switching converter has an inductor element coupled to an input and a switch element coupled to the inductor element and generates a command signal having a switching period to switch the switch element and determine a first time period in which an inductor current is flowing in the inductor element for storing energy and a second time period in which energy is transferred to a load. An input current is distorted relative to a sinusoid by a distortion factor caused by current ripple on the inductor current. The duration of the first time period is determined based on a comparison between a peak value of the inductor current and a current reference that is a function of an output voltage of said voltage converter. A reference modification stage modifies one of the current reference and sensed value of the inductor current to compensate for distortion introduced by the distortion factor on the input current.
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33.发明授权公开(公告)号：US10236774B2
公开(公告)日：2019-03-19
申请号：US16027004
申请日：2018-07-03
Applicant: STMICROELECTRONICS S.R.L.
Inventor： Giovanni Gritti
Abstract: A control module controls a switching converter including at least one inductor element and one switching element. The module includes: a driver circuit that generates a control signal which controls the on and off cycles of the switching element; a first modulation circuit which sends a command to the driver circuit in such a manner as to generate edges of a first type of the control signal, as a function of the input electrical quantity and of a reference electrical quantity; and a second modulation circuit which sends a command to the driver circuit in such a manner as to generate edges of a second type of the control signal, as a function of a first and a second internal electrical quantity, which are functions respectively of the charges on a first and a second capacitor, which are charged and discharged as a function of the control signal.
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34.发明授权公开(公告)号：US10128761B2
公开(公告)日：2018-11-13
申请号：US15261340
申请日：2016-09-09
Applicant: STMICROELECTRONICS S.R.L.
Inventor： Giovanni Gritti , Claudio Adragna
Abstract: The present disclosure is directed to a primary-controlled high power factor quasi resonant converter. The converter converts an AC power line input to a DC output to power a load, generally a string of LEDs, and may be compatible with phase-cut dimmers. The power input is fed into a transformer being controlled by a power switch. The power switch is driven by a controller having a shaping circuit. The shaping circuit uses a current generator, switched resistor and capacitor to produce a reference voltage signal. The controller drives the power switch based on the voltage reference signal, resulting in a sinusoidal input current in a primary winding of the transformer, resulting in high power factor and low total harmonic distortion for the converter.
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公开(公告)号：US20180184493A1
公开(公告)日：2018-06-28
申请号：US15887698
申请日：2018-02-02
Applicant: STMicroelectronics S.r.l.
Inventor： Giovanni Gritti
CPC classification number: H05B33/0815 , H02M1/08 , H02M1/36 , H02M1/4258 , H02M3/33507 , H02M2001/0009 , H02M2001/0022 , H02M2001/0025
Abstract: A method controls a power switch and senses a primary current through a transformer primary winding coupled to the power switch and deactivates the switch responsive to the sensed primary current reaching a current sensed reference. A demagnetization mode is initiated responsive to deactivating the power switch. During this mode a first capacitance is charged with a first charging current to generate the current sensed reference. The first charging current is based on a bias signal. A second capacitance is charged with a second charging current to generate the bias signal. The second charging current is based on a compensation signal. A third charging current generates a comparison signal, the third charging current based on the current sensed reference. The compensation signal is based on a difference between the comparison signal and an internal reference and the power switch activated based on a secondary current in a secondary transformer winding.
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Patent Agency Ranking
公开(公告)号：US09973095B2
公开(公告)日：2018-05-15
申请号：US15344288
申请日：2016-11-04
Applicant: STMICROELECTRONICS S.R.L.
Inventor： Claudio Adragna , Giovanni Gritti
CPC classification number: H02M3/33523 , H02M1/08 , H02M1/32 , H02M1/36 , H02M1/42 , H02M1/4258 , H02M2001/0009 , H02M2001/0058
Abstract: The present disclosure is directed to a high power factor quasi resonant converter. The converter converts an AC power line input to a DC output to power a load, generally a string of LEDs. The power input is fed into a transformer being controlled by a power switch. The power switch is driven by a controller having a shaping circuit. The shaping circuit uses a current generator, switched resistor and capacitor to produce a sinusoidal reference voltage signal. The controller drives the power switch based on the voltage reference signal, resulting in a sinusoidal input current in a primary winding of the transformer, resulting in high power factor and low total harmonic distortion for the converter.
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公开(公告)号：US20180048239A1
公开(公告)日：2018-02-15
申请号：US15722398
申请日：2017-10-02
Applicant: STMicroelectronics S.r.l.
Inventor： Claudio Adragna , Giovanni Gritti
CPC classification number: H02M3/33523 , H02M1/08 , H02M1/32 , H02M1/36 , H02M1/42 , H02M1/4258 , H02M2001/0009 , H02M2001/0058 , Y02B70/126 , Y02B70/1433 , Y02B70/1491
Abstract: The present disclosure is directed to a high power factor quasi resonant converter. The converter converts an AC power line input to a DC output to power a load, generally a string of LEDs. The power input is fed into a transformer being controlled by a power switch. The power switch is driven by a controller having a shaping circuit. The shaping circuit uses a current generator, switched resistor and capacitor to produce a sinusoidal reference voltage signal. The controller drives the power switch based on the voltage reference signal, resulting in a sinusoidal input current in a primary winding of the transformer, resulting in high power factor and low total harmonic distortion for the converter.
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公开(公告)号：US20180004240A1
公开(公告)日：2018-01-04
申请号：US15383844
申请日：2016-12-19
Applicant: STMICROELECTRONICS S.R.L.
Inventor： Giovanni Gritti , Claudio Adragna
CPC classification number: G02B26/0833 , B81B3/0045 , B81B2201/042 , B81B2203/0315 , B81B2203/056 , G05F3/26 , H02M1/12 , H02M1/15 , H02M1/42 , H02M1/4225 , H02M1/4258 , H02M3/33507 , H02M2001/0025 , H02M2001/0032 , H04N9/3155 , H04N9/3173 , Y02B70/126 , Y02B70/16 , Y02P80/112
Abstract: A control device for controlling a switching converter includes a switch controller that generates a control signal with a switching period for controlling switching of a switch of the switching converter and setting a first interval in which a current flows in the switch, a second interval in which energy is transferred onto a storage element of the switching converter, and a third, wait, interval, at the end of the second interval. The duration of the first interval is determined based on a control voltage indicating the output voltage. A pre-distortion stage receives the control voltage and generates a pre-distorted control voltage as a function of the control voltage and a relationship between one of the first and third time intervals and the switching period, wherein the switch controller is configured to control a duration of the first interval based on the pre-distorted control voltage.
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公开(公告)号：US20170117814A1
公开(公告)日：2017-04-27
申请号：US15344288
申请日：2016-11-04
Applicant: STMICROELECTRONICS S.R.L.
Inventor： Claudio Adragna , Giovanni Gritti
CPC classification number: H02M3/33523 , H02M1/08 , H02M1/32 , H02M1/36 , H02M1/42 , H02M1/4258 , H02M2001/0009 , H02M2001/0058
Abstract: The present disclosure is directed to a high power factor quasi resonant converter. The converter converts an AC power line input to a DC output to power a load, generally a string of LEDs. The power input is fed into a transformer being controlled by a power switch. The power switch is driven by a controller having a shaping circuit. The shaping circuit uses a current generator, switched resistor and capacitor to produce a sinusoidal reference voltage signal. The controller drives the power switch based on the voltage reference signal, resulting in a sinusoidal input current in a primary winding of the transformer, resulting in high power factor and low total harmonic distortion for the converter.
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40.发明授权Control method and device for quasi-resonant high-power-factor flyback converter 有权准谐振大功率因数反激式转换器的控制方法和装置公开(公告)号：US09520796B2
公开(公告)日：2016-12-13
申请号：US14572638
申请日：2015-03-06
Applicant: STMICROELECTRONICS S.R.L.
Inventor： Claudio Adragna , Giovanni Gritti
CPC classification number: H02M3/33523 , H02M1/08 , H02M1/32 , H02M1/36 , H02M1/42 , H02M1/4258 , H02M2001/0009 , H02M2001/0058
Abstract: The present disclosure is directed to a high power factor quasi resonant converter. The converter converts an AC power line input to a DC output to power a load, generally a string of LEDs. The power input is fed into a transformer being controlled by a power switch. The power switch is driven by a controller having a shaping circuit. The shaping circuit uses a current generator, switched resistor and capacitor to produce a sinusoidal reference voltage signal. The controller drives the power switch based on the voltage reference signal, resulting in a sinusoidal input current in a primary winding of the transformer, resulting in high power factor and low total harmonic distortion for the converter.
Abstract translation: 本公开涉及一种高功率因数准谐振转换器。 转换器将交流电源线输入转换为直流输出，为负载（通常为一串LED）供电。 电源输入馈送到由电源开关控制的变压器中。 电源开关由具有整形电路的控制器驱动。 整形电路使用电流发生器，开关电阻和电容器来产生正弦参考电压信号。 控制器根据电压参考信号驱动电源开关，导致变压器初级绕组中的正弦输入电流，导致转换器的功率因数高，总谐波失真低。
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