公开(公告)号：US11552573B1

公开(公告)日：2023-01-10

申请号：US17523651

申请日：2021-11-10

Applicant: STMicroelectronics S.r.l.

Inventor： Claudio Adragna ,  Francesco Ferrazza

IPC: H02M3/335 ,  H02M1/08

Abstract: In an embodiment, a method for operating an ACF converter includes: turning on a low-side transistor that is coupled between a primary winding of a transformer and a reference terminal to cause a forward current to enter the primary winding, turning off the low-side transistor; after turning off the low-side transistor, turning on a high-side transistor that is coupled between the primary winding and a clamp capacitor to cause a reverse current to flow through the primary winding; and after turning on the high-side transistor, when an overcurrent of the reverse current is not detected, keeping the high-side transistor on for a first period of time, and turning off the high-side transistor after the first period of time, and when the overcurrent of the reverse current is detected, turning off the high-side transistor without keeping the high-side transistor on for the first period of time.

公开(公告)号：US12160174B2

公开(公告)日：2024-12-03

申请号：US18389940

申请日：2023-12-20

Applicant: STMicroelectronics (Grenoble 2) SAS ,  STMicroelectronics S.r.l.

Inventor： Jean Camiolo ,  Francesco Ferrazza ,  Nathalie Ballot

IPC: H02M3/335 ,  G06F13/42 ,  H02M1/32

Abstract: In an embodiment, a USB interface includes a transformer, a primary winding of the transformer, and a first switch in series between a first and a second node, a secondary winding of the transformer and a component in series between a third and a fourth node, the fourth node configured to be set a first reference potential, a second switch connected between the third node and a first terminal, the first terminal configured to provide an output voltage of the USB interface; wherein the component is configured to avoid a current circulation in the secondary winding when the first switch is closed and a control circuit configured to compare a first voltage of an interconnection node between the secondary winding and the component to a first threshold and compare the first voltage to a second threshold when the first voltage is, in absolute values, above the first threshold.

公开(公告)号：US09948188B2

公开(公告)日：2018-04-17

申请号：US14829398

申请日：2015-08-18

Applicant: STMICROELECTRONICS S.R.L.

Inventor： Francesco Ferrazza ,  Davide Lena ,  Mirko Gravati ,  Domenico Tripodi ,  Massimiliano Leggenda

IPC: H02M7/217 ,  H02M3/335 ,  H02M1/08 ,  H02M1/00

CPC classification number: H02M3/33507 ,  H02M3/33523 ,  H02M2001/0058 ,  Y02B70/1433 ,  Y02B70/1491

Abstract: A control device for a switching converter having a transformer, with a primary winding receiving an input quantity, a secondary winding providing an output quantity, an auxiliary winding providing a feedback quantity, and a switch element. The control device has a processing module for generating a control signal for switching the switch element on the basis of the feedback quantity in order to regulate the output quantity via alternation of phases of storage and transfer of energy. The processing module controls the end of the transfer phase by comparing the feedback quantity with a comparison threshold. A discrimination circuit generates a signal for discrimination between the presence of a short circuit on the output or the fact that the input quantity is lower than a threshold. The processing module controls the end of the energy-transfer phase also on the basis of the discrimination signal.

公开(公告)号：US20150003117A1

公开(公告)日：2015-01-01

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

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：US12113446B2

公开(公告)日：2024-10-08

申请号：US17698786

申请日：2022-03-18

Applicant: STMicroelectronics S.r.l.

Inventor： Francesco Ferrazza ,  Mirko Gravati ,  Christian Leone Santoro

IPC: H02M3/335 ,  H02M1/08 ,  H02M1/32

CPC classification number: H02M3/335 ,  H02M1/08 ,  H02M1/32

Abstract: A control circuit for controlling a switching stage of an electronic converter includes a first terminal configured to provide a drive signal and a second terminal configured to receive a first feedback signal. A third terminal receives a second feedback signal and a driver circuit provides the drive signal as a function of a PWM signal. A PWM signal generator circuit generates the PWM signal as a function of the first feedback signal, a reference threshold and the second feedback signal or a slope compensation signal. The control circuit is configured to sense an input signal, provide a first compensation parameter, and provide a first compensating signal as a function of a power of the input sensing signal.

公开(公告)号：US20240128877A1

公开(公告)日：2024-04-18

申请号：US18389940

申请日：2023-12-20

Applicant: STMicroelectronics ( Grenoble 2) SAS ,  STMicroelectronics S.r.l.

Inventor： Jean Camiolo ,  Francesco Ferrazza ,  Nathalie Ballot

IPC: H02M3/335 ,  G06F13/42 ,  H02M1/32

CPC classification number: H02M3/33523 ,  G06F13/4282 ,  H02M1/32 ,  H02M3/33569 ,  H02M3/33576 ,  G06F2213/0042

Abstract: In an embodiment, a USB interface includes a transformer, a primary winding of the transformer, and a first switch in series between a first and a second node, a secondary winding of the transformer and a component in series between a third and a fourth node, the fourth node configured to be set a first reference potential, a second switch connected between the third node and a first terminal, the first terminal configured to provide an output voltage of the USB interface; wherein the component is configured to avoid a current circulation in the secondary winding when the first switch is closed and a control circuit configured to compare a first voltage of an interconnection node between the secondary winding and the component to a first threshold and compare the first voltage to a second threshold when the first voltage is, in absolute values, above the first threshold.

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：US11888400B2

公开(公告)日：2024-01-30

申请号：US17373881

申请日：2021-07-13

Applicant: STMicroelectronics (Grenoble 2) SAS ,  STMicroelectronics S.r.l.

Inventor： Jean Camiolo ,  Francesco Ferrazza ,  Nathalie Ballot

IPC: H02M3/335 ,  G06F13/42

CPC classification number: H02M3/33523 ,  G06F13/4282 ,  G06F2213/0042

Abstract: In an embodiment, an USB interface includes a transformer, a primary winding of the transformer and a first switch connected in series between a first node and a second node, a secondary winding of the transformer and a component connected in series between a third node and a fourth node, the fourth node configured to be set a first reference potential, a second switch connected between the third node and a first terminal, the first terminal configured to provide an output voltage of the USB interface; wherein the component is configured to avoid a current circulation in the secondary winding when the first switch is closed and a control circuit configured to compare a first voltage of an interconnection node between the secondary winding and the component to a first threshold and compare the first voltage to a second threshold when the first voltage is, in absolute values, above the first threshold.

公开(公告)号：US20160126846A1

公开(公告)日：2016-05-05

申请号：US14829398

申请日：2015-08-18

Applicant: STMICROELECTRONICS S.R.L.

Inventor： Francesco Ferrazza ,  Davide Lena ,  Mirko Gravati ,  Domenico Tripodi ,  Massimiliano Leggenda

IPC: H02M3/335

CPC classification number: H02M3/33507 ,  H02M3/33523 ,  H02M2001/0058 ,  Y02B70/1433 ,  Y02B70/1491

Abstract: A control device for a switching converter having a transformer, with a primary winding receiving an input quantity, a secondary winding providing an output quantity, an auxiliary winding providing a feedback quantity, and a switch element. The control device has a processing module for generating a control signal for switching the switch element on the basis of the feedback quantity in order to regulate the output quantity via alternation of phases of storage and transfer of energy. The processing module controls the end of the transfer phase by comparing the feedback quantity with a comparison threshold. A discrimination circuit generates a signal for discrimination between the presence of a short circuit on the output or the fact that the input quantity is lower than a threshold. The processing module controls the end of the energy-transfer phase also on the basis of the discrimination signal.

Abstract translation: 一种用于具有变压器的开关转换器的控制装置，其中初级绕组接收输入量，提供输出量的次级绕组，提供反馈量的辅助绕组和开关元件。 控制装置具有处理模块，用于根据反馈量产生用于切换开关元件的控制信号，以通过存储和能量转移的相位的交替来调节输出量。 处理模块通过将反馈量与比较阈值进行比较来控制转移阶段的结束。 识别电路产生用于区分输出上的短路存在或输入量低于阈值的事实的信号。 处理模块也基于鉴别信号控制能量转移阶段的结束。