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：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.

公开(公告)号：US12040722B2

公开(公告)日：2024-07-16

申请号：US17523561

申请日：2021-11-10

Applicant: STMicroelectronics S.r.l.

Inventor： Claudio Adragna

IPC: H02M3/335 ,  H02M1/08

CPC classification number: H02M3/33592 ,  H02M1/08

Abstract: In an embodiment, a method for controlling a synchronous rectifier (SR) transistor of a flyback converter includes: determining a first voltage across conduction terminals of the SR transistor; asserting a turn-on signal when a body diode of the SR transistor is conducting current; asserting a turn-off signal when current flowing through the conduction terminals of the SR transistor decreases below a first threshold; generating a gating signal based on an output voltage of the flyback converter and on the first voltage; turning on the SR transistor based on the turn-on signal and on the gating signal; and turning off the SR transistor based on the turn-off signal.

公开(公告)号：US11825571B2

公开(公告)日：2023-11-21

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：US11387739B2

公开(公告)日：2022-07-12

申请号：US17006022

申请日：2020-08-28

Applicant: STMicroelectronics S.r.l.

Inventor： Claudio Adragna

IPC: H02M3/335 ,  H02M1/08 ,  H02M3/00 ,  H02M1/00

Abstract: A driver circuit for a resonant converter includes a comparator that generates a first control signal indicating when a resonant current changes sign. A first ramp generator circuit outputs a first ramp signal, and a comparison circuit determines whether the first ramp signal reaches a reference threshold. The driver circuit drives a half-bridge via drive signals during consecutive first second switching semi-periods, each of which ends when the comparison circuit indicates the first ramp signal has reached a reference threshold. A control circuit generates in each of the first and the second switching semi-periods control signals indicating a first interval and a second interval. A correction circuit modifies the first ramp signal to have a first gradient value during the first interval and a second gradient value during the second interval. Alternatively, the correction circuit modifies a reference threshold by adding a second ramp signal to an initial threshold value.

公开(公告)号：US10389223B1

公开(公告)日：2019-08-20

申请号：US16230013

申请日：2018-12-21

Applicant: STMICROELECTRONICS S.R.L.

Inventor： Alberto Bianco ,  Claudio Adragna

IPC: H02M1/08 ,  H02M3/335 ,  H02M1/00

Abstract: A method and controller for controlling a converter are provided. The converter is operated in a first phase in which controller logic asserts a first gate drive signal to cause a first transistor of the converter to be conductive and deasserts a second gate drive signal to cause a second transistor of the converter to be non-conductive. In a first deadtime phase and a second phase, the controller logic deasserts both the first and second gate drive signals to cause leakage energy from a leakage inductance of a primary winding of the converter to be transferred to a clamp capacitance of the converter. After the leakage energy is transferred, the converter is operated in a third phase in which the logic asserts the second gate drive signal and deasserts the first gate drive signal.

公开(公告)号：US10241322B2

公开(公告)日：2019-03-26

申请号：US15383844

申请日：2016-12-19

Applicant: STMICROELECTRONICS S.R.L.

Inventor： Giovanni Gritti ,  Claudio Adragna

IPC: H02M3/335 ,  G02B26/08 ,  H02M1/12 ,  H02M1/15 ,  B81B3/00 ,  H04N9/31 ,  G05F3/26 ,  H02M1/42 ,  H02M1/00

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.