公开(公告)号：US09735686B2

公开(公告)日：2017-08-15

申请号：US14860570

申请日：2015-09-21

Applicant: STMicroelectronics S.r.l.

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

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

CPC classification number: H02M3/33507 ,  H02M3/3376 ,  H02M2001/0058 ,  Y02B70/1433 ,  Y02B70/1491

Abstract: A control device controls a switching circuit for a converter. The switching circuit comprises a half-bridge having a high-side transistor and a low-side transistor. The control device comprises a controller configured to control turning on and turning off said two transistors, so that a square-wave voltage is applied to the transformer primary. The controller is configured to start switching the half-bridge by turning on the low-side transistor. The control device comprises a first timer configure to initially turn on the low-side transistor for a duration given by a first time period useful for pre-charging a bootstrap capacitor couplable to the middle point of the half-bridge, and a second timer configured to keep the low-side transistor and the high-side transistor turned off for a second time period immediately following the first time period and having a longer duration than the first time period.

公开(公告)号：US09705412B2

公开(公告)日：2017-07-11

申请号：US14632774

申请日：2015-02-26

Applicant: STMICROELECTRONICS S.R.L.

Inventor： Claudio Adragna

IPC: H02M3/335 ,  H02M3/156 ,  G05F1/56

CPC classification number: H02M3/33569 ,  G05F1/56 ,  H02M3/156

Abstract: The present disclosure is directed to a switching power converter having a regulated output voltage or output current. The power converter uses a control unit having a signal conditioning circuit to produce a control voltage signal, which is used to drive a power stage of the converter. The signal conditioning circuit includes a comparator that compares a measured electrical quantity to a reference value representative of a desired regulated output quantity, and produces a digital detection signal based on the comparison. A control actuator uses the digital detection signal to produce a correction signal, which is received by an averaging circuit. The averaging circuit then produces the control voltage signal based on an average of the correction signal.

公开(公告)号：US20170179833A1

公开(公告)日：2017-06-22

申请号：US15166704

申请日：2016-05-27

Applicant: STMicroelectronics S.R.L.

Inventor： Claudio Adragna

IPC: H02M3/335 ,  H03F3/45 ,  H03K17/687 ,  H02M1/08

CPC classification number: H02M3/33507 ,  H02M1/08 ,  H02M3/335 ,  H02M2001/0009 ,  H02M2001/0025 ,  H02M2001/0035 ,  H03F3/45475 ,  H03K17/687 ,  Y02B70/16

Abstract: A power control module for an electronic converter is disclosed. The electronic converter includes a power stage comprising two input terminals for receiving a first power signal and two output terminals for providing a second power signal. The electronic converter includes, moreover, a control circuit configured to control operation of the power stage as a function of a feedback control signal. In particular, the power control module includes a pre-elaboration module configured to generate a reference signal as a function of the feedback control signal and a first signal being representative of a voltage applied to the two input terminals. An error amplifier is configured to generate a modified control signal as a function the reference signal and a second signal being representative of a current flowing through the two input terminals.

公开(公告)号：US20160172981A1

公开(公告)日：2016-06-16

申请号：US14572627

申请日：2014-12-16

Applicant: STMICROELECTRONICS S.R.L.

Inventor： Giovanni Gritti ,  Claudio Adragna

IPC: H02M3/335

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.

Abstract translation: 本公开涉及初级控制的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以为负载（通常为一串LED）供电，并且可能与相位调制器兼容。 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。

公开(公告)号：US09318966B2

公开(公告)日：2016-04-19

申请号：US14311116

申请日：2014-06-20

Applicant: STMicroelectronics S.r.l.

Inventor： Francesco Ferrazza ,  Ambrogio Giuseppe D'Adda ,  Claudio Adragna

IPC: H02M3/335 ,  H02M1/15 ,  H02M1/00

CPC classification number: H02M3/33546 ,  H02M1/15 ,  H02M3/335 ,  H02M2001/0035 ,  H02M2001/0054 ,  Y02B70/1433 ,  Y02B70/16

Abstract: A method of controlling a switching converter and a related controller suitable for the switching converter allow to implement a burst-mode functioning without generating acoustic noise and with a relevantly reduced ripple of the regulated DC voltage or current provided in output to a supplied load. The method includes sensing the difference between the error signal and the burst-stop threshold at the beginning of a burst period. If the error signal has surpassed (either upwards or downwards) the burst-stop threshold, the method sets the switching stage in a high impedance state at a new active edge of a clock signal, keeps the switching stage in the high impedance state for an integer number of cycles of the clock signal, and re-enables the switching stage to switch the energy tank circuit up to the end of the burst period. The integer number is determined based on the difference between the error signal and the burst-stop threshold.

Abstract translation: 一种控制开关转换器的方法和适用于开关转换器的相关控制器允许实现突发模式功能，而不会产生声学噪声，并且将输出中提供的调节的直流电压或电流的纹波相对减小到所提供的负载。 该方法包括在突发周期开始时感测误差信号与脉冲串 - 停止阈值之间的差异。 如果误差信号已经超过（向上或向下）突发停止阈值，则该方法将时钟信号的新的有效边沿处的开关级设置为高阻抗状态，将开关级保持在高阻抗状态 时钟信号的整数周期，并且重新使能开关级将能量槽电路切换到爆发周期结束。 基于误差信号和突发停止阈值之间的差异来确定整数。

公开(公告)号：US20130293267A1

公开(公告)日：2013-11-07

申请号：US13888180

申请日：2013-05-06

Applicant: STMICROELECTRONICS S.R.L.

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

IPC: H03K17/082

CPC classification number: H03K17/082 ,  H02M1/32 ,  H02M1/36 ,  H02M1/38 ,  H02M3/3382 ,  H02M2001/0058 ,  Y02B70/1433 ,  Y02B70/1491

Abstract: A control device of a switching circuit of a resonant apparatus is described. The switching circuit comprises at least one half-bridge having a high-side transistor and a low-side transistor connected between an input voltage and a reference voltage; the resonant apparatus comprises a resonant load. The control device is configured to determine the on time period and the off time period of the transistors alternatively and a dead time of both the transistors so that a periodic square-wave voltage is applied to the resonant load. The control device comprises a detector adapted to detect the current sign flowing through the resonant load and a correction circuit configured to extend the current operating time period of said two transistors in response to at least the current sign detected from the detection means.

Abstract translation: 描述谐振装置的开关电路的控制装置。 开关电路包括具有连接在输入电压和参考电压之间的高侧晶体管和低侧晶体管的至少一个半桥; 谐振装置包括谐振负载。 控制装置被配置为确定晶体管的导通时间段和关闭时间段以及两个晶体管的死区时间，使得周期性方波电压被施加到谐振负载。 控制装置包括检测器，其适于检测流过谐振负载的电流符号，以及校正电路，其被配置为响应于至少从检测装置检测到的电流符号来扩展所述两个晶体管的当前工作时间段。

公开(公告)号：US11622429B1

公开(公告)日：2023-04-04

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 deassert 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.

公开(公告)号：US20230101140A1

公开(公告)日：2023-03-30

申请号：US17888214

申请日：2022-08-15

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：US20200350826A1

公开(公告)日：2020-11-05

申请号：US16933534

申请日：2020-07-20

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.

公开(公告)号：US10756637B2

公开(公告)日：2020-08-25

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.