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公开(公告)号：US20210226527A1
公开(公告)日：2021-07-22
申请号：US17151397
申请日：2021-01-18
Applicant: STMicroelectronics S.r.l.
Inventor： Alfio Pasqua , Salvatore Tumminaro , Marco Sammartano , Claudio Adragna
IPC: H02M1/42
Abstract: An embodiment PFC control circuit comprises a first terminal providing a drive signal to an electronic switch of a boost converter, a second terminal receiving a feedback signal indicative of an output voltage generated by the boost converter, and a third terminal connected to a compensation network. An error amplifier generates a current as a function of the voltage at the second terminal and a reference voltage, wherein an output of the error amplifier is coupled to the third terminal. A driver circuit generates the drive signal as a function of the voltage at the third terminal, and selectively activates or deactivates the generation of the drive signal as a function of a burst mode enable signal. A detection circuit generates the burst mode enable signal as a function of the voltage at the second terminal.
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公开(公告)号：US20190109543A1
公开(公告)日：2019-04-11
申请号：US16211619
申请日：2018-12-06
Applicant: STMicroelectronics S.r.l.
Inventor： Claudio Adragna , Giuseppe Gattavari , Paolo Mattavelli , Enrico Orietti , Giorgio Spiazzi
IPC: H02M3/335
Abstract: A PWM controlled multi-phase resonant voltage converter may include a plurality of primary windings powered through respective half-bridges, and as many secondary windings connected to an output terminal of the converter and magnetically coupled to the respective primary windings. The primary or secondary windings may be connected such that a real or virtual neutral point is floating.
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公开(公告)号：US10243470B2
公开(公告)日：2019-03-26
申请号：US15915758
申请日：2018-03-08
Applicant: STMicroelectronics S.r.l.
Inventor： Claudio Adragna
Abstract: A control circuit for an electronic converter having a power stage controls the operation of a power stage as a function of a feedback control signal that indicates an input power provided to the power stage. The control circuit generates a digital reference signal as a function of the feedback control signal and a first signal based on an input voltage supplied to the power stage. The control circuit generates a modified control signal as a function of the digital reference signal and a second signal based on an input current supplied to the power stage.
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64.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：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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Patent Agency Ranking
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：US20170317597A1
公开(公告)日：2017-11-02
申请号：US15653145
申请日：2017-07-18
Applicant: STMicroelectronics S.r.l.
Inventor： Claudio Adragna , Aldo Vittorio Novelli , Christian Leone Santoro
CPC classification number: H02M3/33507 , H02M3/3376 , H02M2001/0058 , Y02B70/1433 , Y02B70/1491 , Y02P80/112
Abstract: A circuit includes a timer circuit configured to generate a first control signal defining a first time period and a second control signal defining a second time period. A controller is configured to control a high-side and a low-side transistor of a half-bridge circuit in response to the first and second control signals only during a first switching cycle of the half-bridge circuit. The half-bridge circuit includes a bootstrap capacitor coupled to a node between the high-side and low-side transistors. The controller turns on the low-side transistor for the first time period during the first switching cycle and configured turns off the low-side and the high-side transistors for the second time period during the first switching cycle.
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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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70.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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