公开(公告)号：US20230156881A1

公开(公告)日：2023-05-18

申请号：US18151191

申请日：2023-01-06

Applicant: STMicroelectronics S.r.l.

Inventor： Giovanni Gritti ,  Claudio Adragna

IPC: H05B45/10 ,  H02M1/42 ,  H05B45/385

CPC classification number: H05B45/10 ,  H02M1/4225 ,  H02M1/4258 ,  H05B45/385

Abstract: A control circuit includes an output terminal configured to be coupled to a control terminal of a transistor that has a current path coupled to an inductor; a transconductance amplifier configured to produce a sense current based on a current flowing through the current path of the transistor; and a first capacitor. The control circuit is configured to turn on the transistor based on a clock signal, integrate the sense current with an integrating capacitor to generate a first voltage, generate a second voltage across the first capacitor based on a first current, generate a second current based on the second voltage, generate a third voltage based on the second current, turn off the transistor when the first voltage becomes higher than the third voltage; discharge the integrating capacitor when the transistor turns off; and regulate an average output current flowing through the inductor based on the first current.

公开(公告)号：US11452184B1

公开(公告)日：2022-09-20

申请号：US17487944

申请日：2021-09-28

Applicant: STMicroelectronics S.r.l.

Inventor： Claudio Adragna ,  Giovanni Gritti

IPC: H05B45/10 ,  H02M1/42 ,  H05B45/385

Abstract: A control circuit includes: a flip-flop having an output configured to be coupled to a control terminal of a transistor and for producing a first signal; a comparator having an output coupled to an input of the flip-flop, and first and second inputs for receiving first and second voltages, respectively; a transconductance amplifier having an input for receiving a sense voltage indicative of a current flowing through the transistor, and an output coupled to the first input of the comparator; a zero crossing detection (ZCD) circuit having an input configured to be coupled to a first current path terminal of the transistor and to an inductor, where the ZCD circuit is configured to detect a demagnetization time of the inductor and produce a third signal based on the detected demagnetization time; and a reference generator configured to generate the second voltage based on the first and third signals.

公开(公告)号：US11258354B2

公开(公告)日：2022-02-22

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 ,  H02M1/00

Abstract: An embodiment PFC control circuit includes 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.

公开(公告)号：US10250145B2

公开(公告)日：2019-04-02

申请号：US15653145

申请日：2017-07-18

Applicant: STMicroelectronics S.r.l.

Inventor： Claudio Adragna ,  Aldo Vittorio Novelli ,  Christian Leone Santoro

IPC: H02M3/335 ,  H02M3/337 ,  H02M1/00

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.

公开(公告)号：US20190052175A1

公开(公告)日：2019-02-14

申请号：US16155650

申请日：2018-10-09

Applicant: STMicroelectronics S.r.l.

Inventor： Giovanni Gritti ,  Claudio Adragna

IPC: H02M3/335 ,  H02M1/12 ,  H02M1/42 ,  H05B33/08 ,  H02M1/08

CPC classification number: H02M3/33507 ,  H02M1/08 ,  H02M1/12 ,  H02M1/4241 ,  H05B33/0815 ,  H05B33/0845 ,  Y02B70/126 ,  Y02B70/1433

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.

公开(公告)号：US20180006568A1

公开(公告)日：2018-01-04

申请号：US15693166

申请日：2017-08-31

Applicant: STMicroelectronics S.r.l.

Inventor： Claudio Adragna ,  Giuseppe Gattavari ,  Paolo Mattavelli ,  Enrico Orietti ,  Giorgio Spiazzi

IPC: H02M3/335

CPC classification number: H02M3/33569 ,  H02M3/335 ,  Y02B70/1433

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.

公开(公告)号：US09800148B2

公开(公告)日：2017-10-24

申请号：US14957329

申请日：2015-12-02

Applicant: STMICROELECTRONICS S.R.L.

Inventor： Giovanni Gritti ,  Claudio Adragna

IPC: G05F1/00 ,  H05B37/02 ,  H05B39/04 ,  H05B41/36 ,  H02M3/157 ,  H02M1/42 ,  H02M1/00

CPC classification number: H02M3/157 ,  H02M1/4225 ,  H02M1/4258 ,  H02M2001/0025 ,  H02M2001/0048 ,  H02M2001/0058 ,  H02M2001/0064 ,  H05B37/0209 ,  Y02B70/126 ,  Y02B70/1491

Abstract: Described herein is a module for controlling a switching converter, which includes at least one inductor element and one switch element and generates an output electric quantity starting from an input electric quantity. The control module generates a command signal for controlling the switching of the switch element and includes an estimator stage, which generates an estimation signal proportional to the input electric quantity, on the basis of the command signal and of an input signal indicating a time interval in which the inductor element is demagnetized. The control module generates the command signal on the basis of the estimation signal.

公开(公告)号：US09461558B2

公开(公告)日：2016-10-04

申请号：US13749533

申请日：2013-01-24

Applicant: DORA S.p.A. ,  STMicroelectronics S.r.l.

Inventor： Alberto Bianco ,  Claudio Adragna

IPC: H02M5/42 ,  H02M7/04 ,  H02M7/68 ,  G05F1/00 ,  H02M7/217 ,  H02M1/42

CPC classification number: H02M7/217 ,  H02M1/4225 ,  Y02B70/126

Abstract: A control device of a switching converter controls the closing and opening of a switch of the converter that regulates the operation of an inductor. The control device includes a ramp voltage generator, a switch control circuit configured to close the switch based on a comparison of the ramp voltage with a first signal and a generator control circuit configured to control the ramp voltage generator based on a value of a second signal representative of a current flowing through the inductor of the converter, in comparison with the value of a third signal.

Abstract translation: 开关转换器的控制装置控制调节电感器操作的转换器的开关的闭合和断开。 控制装置包括斜坡电压发生器，开关控制电路，其被配置为基于斜坡电压与第一信号的比较来闭合开关，以及发电机控制电路，其被配置为基于第二信号的值来控制斜坡电压发生器 代表流过转换器的电感器的电流，与第三信号的值相比较。

公开(公告)号：US20160248323A1

公开(公告)日：2016-08-25

申请号：US14957329

申请日：2015-12-02

Applicant: STMICROELECTRONICS S.R.L.

Inventor： Giovanni Gritti ,  Claudio Adragna

IPC: H02M3/157 ,  H05B37/02

CPC classification number: H02M3/157 ,  H02M1/4225 ,  H02M1/4258 ,  H02M2001/0025 ,  H02M2001/0048 ,  H02M2001/0058 ,  H02M2001/0064 ,  H05B37/0209 ,  Y02B70/126 ,  Y02B70/1491

Abstract: Described herein is a module for controlling a switching converter, which includes at least one inductor element and one switch element and generates an output electric quantity starting from an input electric quantity. The control module generates a command signal for controlling the switching of the switch element and includes an estimator stage, which generates an estimation signal proportional to the input electric quantity, on the basis of the command signal and of an input signal indicating a time interval in which the inductor element is demagnetized. The control module generates the command signal on the basis of the estimation signal.

Abstract translation: 这里描述的是用于控制开关转换器的模块，其包括至少一个电感器元件和一个开关元件，并且从输入电量开始产生输出电量。 所述控制模块生成用于控制所述开关元件的切换的指令信号，并且包括基于所述命令信号和与所述输入电量成比例的输入信号，所述估计器级产生与所述输入电量成比例的估计信号， 电感器元件被去磁。 控制模块基于估计信号产生命令信号。

公开(公告)号：US12136883B2

公开(公告)日：2024-11-05

申请号：US17951703

申请日：2022-09-23

Applicant: STMICROELECTRONICS S.r.l.

Inventor： Claudio Adragna ,  Massimiliano Gobbi ,  Giuseppe Bosisio

IPC: H02M3/335 ,  H02M1/00 ,  H02M1/34

Abstract: An active flyback converter is transitioned between a plurality of operational states based on a comparison of a control voltage signal to voltage thresholds and a count of a number of consecutive switching cycles during which a clamp switch is kept off. The plurality of operational states includes a run state, an idle state, a first burst state, and a second burst state. Each set of consecutive switching cycles of the first burst state includes a determined number of switching cycles during which signals are generated to turn the power switch on and off and to maintain an off state of the clamp switch, and a switching cycle in a determined position in the set of switching cycles during which signals are sequentially generated to turn the power switch on, turn the power switch off, turn the clamp switch on and turn the clamp switch off.