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    High voltage startup booster
    22.
    发明授权
    High voltage startup booster 有权

    公开(公告)号：US11784563B2

    公开(公告)日：2023-10-10

    申请号：US17244795

    申请日：2021-04-29

    Applicant: STMICROELECTRONICS S.R.L.

    Inventor： Alberto Bianco ,  Giuseppe Scappatura ,  Francesco Ciappa

    IPC: H02M3/156 ,  H02M3/07

    CPC classification number: H02M3/156 ,  H02M3/07

    Abstract: An electronic device includes a circuit board that manages supply of electricity to the electronic device. The circuit board includes an integrated circuit and an external capacitor coupled to a supply terminal of the circuit board. During a startup operation of the integrated circuit, the integrated circuit supplies a first charging current to charge the capacitor to a supply voltage value. The circuit board includes a boost circuit that receives a portion of the first charging current and outputs a second charging current that augments charging of the capacitor. The second charging current is an amplification of the first charging current. The integrated circuit enables operation of the electronic device after the capacitor is charged to the supply voltage value.

    CONTROLLER CIRCUIT AND CORRESPONDING CONVERTER DEVICE
    24.
    发明申请
    CONTROLLER CIRCUIT AND CORRESPONDING CONVERTER DEVICE 审中-公开

    公开(公告)号：US20190097540A1

    公开(公告)日：2019-03-28

    申请号：US16129377

    申请日：2018-09-12

    Applicant: STMicroelectronics S.r.l.

    Inventor： Gabriele Gherdovich ,  Alberto Bianco ,  Giuseppe Scappatura

    IPC: H02M3/335 ,  H02M1/08 ,  H02M1/36

    CPC classification number: H02M3/33507 ,  H01L24/97 ,  H02M1/08 ,  H02M1/36 ,  H02M3/33523 ,  H02M3/33592

    Abstract: A controller circuit for an AC-DC converter includes a first controller circuit block configured to drive one or more switches at the primary side of a transformer in the AC-DC converter. A second controller circuit block is configured to sense, at a secondary side of the transformer in said AC-DC converter, a secondary side signal indicative of the output signal from said AC-DC converter. The second controller circuit block generates switching control signals for the first controller circuit block as a function of the secondary side signal. An isolator circuit block between the first controller circuit block and the second controller circuit block includes an isolated transmission channel of the switching control signals from the second controller circuit block to the first controller circuit block.

    Secondary side current mode control for a converter
    25.
    发明授权
    Secondary side current mode control for a converter 有权

    公开(公告)号：US10211744B2

    公开(公告)日：2019-02-19

    申请号：US15595577

    申请日：2017-05-15

    Applicant: STMICROELECTRONICS S.r.l.

    Inventor： Alberto Bianco ,  Giuseppe Scappatura

    IPC: H02M3/335 ,  H02M3/315 ,  H02M1/00

    Abstract: A method and apparatus for secondary side current mode control of a converter are provided. In the method and apparatus, an output voltage of the converter is detected, where the converter has primary and secondary windings that are galvanically isolated in respective primary and secondary sides. A secondary control signal is generated in the secondary side based at least in part on the output voltage and a reference voltage. The secondary control signal is converted to a primary control signal provided in the primary side. The converter is driven in the primary side based at least in part on the primary control signal and a current sense signal indicative of a current flowing through the primary winding.

    DETECTION CIRCUIT FOR AN ACTIVE DISCHARGE CIRCUIT OF AN X-CAPACITOR, RELATED ACTIVE DISCHARGE CIRCUIT, INTEGRATED CIRCUIT AND METHOD
    27.
    发明申请
    DETECTION CIRCUIT FOR AN ACTIVE DISCHARGE CIRCUIT OF AN X-CAPACITOR, RELATED ACTIVE DISCHARGE CIRCUIT, INTEGRATED CIRCUIT AND METHOD 审中-公开
    用于X电容器的有源放电电路的检测电路，相关的主动放电电路，集成电路和方法

    公开(公告)号：US20160124029A1

    公开(公告)日：2016-05-05

    申请号：US14838125

    申请日：2015-08-27

    Applicant: STMICROELECTRONICS S.R.L.

    Inventor： Massimiliano Gobbi ,  Ignazio Salvatore Bellomo ,  Domenico Tripodi ,  Antonio Borrello ,  Alberto Bianco

    IPC: G01R19/165 ,  H02J7/00 ,  G01R19/04

    CPC classification number: G01R19/16557 ,  G01R19/04 ,  H02J7/0072 ,  H02J7/345 ,  H02M2001/322

    Abstract: An active discharge circuit discharges an X. The detection circuit includes a sensor circuit that generates a sensor signal indicative of an AC oscillation voltage at the X capacitor. The detection circuit also includes a processing unit that generates the reset signal as a function of a comparison signal. A comparator circuit generates the comparison signal by comparing the sensor signal with a threshold. A timer circuit sets a discharge enable signal to a first logic level when the timer circuit is reset via a reset signal. The timer circuit determines the time elapsed since the last reset and tests whether the time elapsed exceeds a given timeout value. If the time elapsed exceeds the given timeout value, the timer circuit sets the discharge enable signal to a second logic level. A dynamic threshold generator circuit varies the threshold of the comparator circuit as a function of the sensor signal.

    Abstract translation: 有源放电电路对X放电。检测电路包括传感器电路，其生成表示X电容器处的交流振荡电压的传感器信号。 检测电路还包括根据比较信号产生复位信号的处理单元。 比较器电路通过将传感器信号与阈值进行比较来生成比较信号。 当定时器电路通过复位信号复位时，定时器电路将放电使能信号设置为第一逻辑电平。 定时器电路确定自上次复位以来经过的时间，并测试经过的时间是否超过给定的超时值。 如果经过的时间超过给定的超时值，则定时器电路将放电使能信号设置为第二逻辑电平。 动态阈值发生器电路根据传感器信号改变比较器电路的阈值。

    Method of operating a flyback converter with active clamp, corresponding control circuit and flyback converter
    28.
    发明授权
    Method of operating a flyback converter with active clamp, corresponding control circuit and flyback converter 有权

    公开(公告)号：US11870361B2

    公开(公告)日：2024-01-09

    申请号：US17475017

    申请日：2021-09-14

    Applicant: STMicroelectronics S.r.l.

    Inventor： Alberto Bianco ,  Francesco Ciappa ,  Giuseppe Scappatura

    IPC: H02M3/335

    CPC classification number: H02M3/33592

    Abstract: The present disclosure relates to solutions for operating a flyback converter comprising an active clamp. The flyback converter comprises two input terminals and two output terminals. A first electronic switch and the primary winding of a transformer are connected in series between the input terminals. An active clamp circuit is connected in parallel with the primary winding. The active clamp circuit comprises a series connection of a clamp capacitor and a second electronic switch. A third electronic switch and the secondary winding of the transformer are connected in series between the two output terminals. In particular, the present disclosure relates to solutions for switching the first, second and third electronic switch in order to achieve a zero-voltage switching of the first electronic switch.

    Symmetric time shift control for resonant converters
    29.
    发明授权
    Symmetric time shift control for resonant converters 有权

    公开(公告)号：US10686382B2

    公开(公告)日：2020-06-16

    申请号：US15399335

    申请日：2017-01-05

    Applicant: STMICROELECTRONICS S.R.L.

    Inventor： Alberto Bianco ,  Marco Dell'Oro ,  Giuseppe Scappatura ,  Luca Longhi ,  Matteo Sucameli ,  Dino Ciambellotti

    IPC: H02M3/335 ,  H02M1/08 ,  H02M3/337 ,  H02M1/00

    Abstract: A control circuit controls a switching circuit of a resonant converter where the switching circuit includes first and second power switches. A first on time of the first power switch and a second on time of the second power switch are controlled to generate a square wave signal to drive the resonant circuit. The control circuit controls the first on time based on a zero current detection time indicating detection of a zero current crossing of a resonant current generated in the resonant circuit in response to the square wave signal and on a time shift delay time based on an output voltage of the resonant converter. The second on time of the second power switch control is based on the zero current detection time detected for the first power switch and on the time shift delay time.

    Active clamp flyback converter control with reduced current
    30.
    发明授权
    Active clamp flyback converter control with reduced current 有权

    公开(公告)号：US10205377B1

    公开(公告)日：2019-02-12

    申请号：US15948183

    申请日：2018-04-09

    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.

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