公开(公告)号：US20150155776A1

公开(公告)日：2015-06-04

申请号：US14549211

申请日：2014-11-20

Applicant: STMicroelectronics S.r.l.

Inventor： Claudia Castelli ,  Claudio Adragna

IPC: H02M1/42

CPC classification number: H02M1/4208 ,  H02M1/4225 ,  H02M2001/0032 ,  Y02B70/126 ,  Y02B70/16

Abstract: A method controls a power factor correction converter that includes a boost inductor and a switch. The method generates a sense signal representing a rectified AC input voltage or an inductor current through the boost inductor, turns on the switch in response to determining, based on the sense signal, a zero current condition through the boost inductor, turns off the switch after an on-time interval, generates a feedback signal based on an output voltage of the converter, and compares the feedback signal with a threshold. If the feedback signal is smaller than the threshold, the method generates a command signal, representing a phase domain including 0 and π, based on the feedback signal and the power threshold, and keeps the switch off when a phase of the input rectified AC voltage or of the inductor current is in the phase domain even if the zero current condition has been determined.

Abstract translation: 一种方法控制包括升压电感和开关的功率因数校正转换器。 该方法产生表示经过升压电感的整流AC输入电压或电感电流的感测信号，响应于基于感测信号确定通过升压电感器的零电流状态来导通开关，在开关之后关闭开关 导通时间间隔，基于转换器的输出电压产生反馈信号，并将反馈信号与阈值进行比较。 如果反馈信号小于阈值，则该方法基于反馈信号和功率阈值生成表示包括0和＆lt; pgr的相位域的指令信号，并且当输入整流AC的相位保持关闭 即使已经确定零电流条件，电压或电感电流也处于相位域。

公开(公告)号：US20150049529A1

公开(公告)日：2015-02-19

申请号：US14458078

申请日：2014-08-12

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

Inventor： Alberto Iorio ,  Giuseppe Scappatura ,  Alberto Bianco ,  Claudio Adragna ,  Silvio De Simone ,  Maurizio Foresta

IPC: H02M7/217 ,  H02M3/335

CPC classification number: H02M7/217 ,  H02M3/33507 ,  H02M3/33592 ,  H02M2001/0058 ,  Y02B70/1475 ,  Y02B70/1491

Abstract: A control device for a transistor of a switching converter rectifier generates a control signal of the transistor and comprises a circuit to measure the conduction time of the body diode of the transistor cycle by cycle. When the conduction time is greater than a first threshold, the off time instant of the transistor is delayed by a first quantity in the next cycles, until the conduction time is less than the first threshold and greater than a second threshold. When the conduction time is between the first and second thresholds, the off time instant is delayed by a fixed second quantity in the next cycles until the conduction time is lower than the second threshold, with the second quantity less than the first quantity. When the conduction time is lower than the second threshold, the off time instant is advanced by the second quantity in the next cycle.

Abstract translation: 用于开关转换器整流器的晶体管的控制装置产生晶体管的控制信号，并且包括用于逐周期地测量晶体管体二极管的导通时间的电路。 当导通时间大于第一阈值时，晶体管的截止时间瞬间在下一个周期中延迟第一量，直到导通时间小于第一阈值并大于第二阈值。 当导通时间在第一阈值和第二阈值之间时，关闭时刻在下一个周期中延迟固定的第二数量，直到导通时间低于第二阈值，第二数量小于第一数量。 当导通时间低于第二阈值时，关闭时刻在下一个周期中提前第二个数量。

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：US20130194845A1

公开(公告)日：2013-08-01

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: H02M7/217

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：US20130088897A1

公开(公告)日：2013-04-11

申请号：US13689422

申请日：2012-11-29

Applicant: STMicroelectronics S.r.l.

Inventor： Claudio Adragna

IPC: H02M3/335

CPC classification number: H02M3/3353 ,  H02M3/33507 ,  H02M3/33523 ,  H02M7/2176 ,  H02M2001/0022

Abstract: An integrated circuit controls a switch of a switching current regulator. The current regulator comprises primary and secondary windings where a first and a second current flow, respectively. The switch is adapted to initiate or interrupt the circulation of the first current in the primary winding. The control integrated circuit comprises a comparator configured to compare a first signal representative of said first current to a second signal and a divider circuit configured to generate said second signal as a ratio of a third signal, proportional to a voltage on the primary winding, with a voltage on a capacitor. The capacitor is charged by a further current controlled by the third signal when the second current is different from zero. The capacitor is discharged through a parallel-connected resistor when the value of said second current is substantially zero.

Abstract translation: 集成电路控制开关电流调节器的开关。 电流调节器包括分别具有第一和第二电流的初级和次级绕组。 开关适于启动或中断初级绕组中的第一电流的循环。 所述控制集成电路包括：比较器，被配置为将表示所述第一电流的第一信号与第二信号进行比较;以及分频器电路，被配置为产生所述第二信号，所述比较器与所述初级绕组上的电压成正比的第三信号与 电容上的电压。 当第二电流不同于零时，通过由第三信号控制的另一电流对电容器进行充电。 当所述第二电流的值基本上为零时，电容器通过并联电阻器放电。

公开(公告)号：US12156303B2

公开(公告)日：2024-11-26

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：US12144077B2

公开(公告)日：2024-11-12

申请号：US17490034

申请日：2021-09-30

Applicant: STMicroelectronics S.r.l.

Inventor： Giovanni Gritti ,  Claudio Adragna

IPC: H05B45/325 ,  H05B45/10 ,  H05B45/397

Abstract: An LED lighting system includes switching circuitry adjustably driving a string of LEDs and being controlled by a reference current and an enable signal. A controller generates the reference current and enable signal based upon a PWM signal such that the switching circuitry: sources a first LED current to the string of LEDs that is proportional to a duty cycle of the PWM signal when the duty cycle is greater than a threshold duty cycle to thereby perform analog dimming; and sources a second LED current to the string of LEDs that has a duty cycle proportional to the duty cycle of the PWM signal when the duty cycle of the PWM signal is less than the threshold duty cycle, such that an average LED current delivered to the string of LEDs is proportional to the duty cycle of the PWM signal to thereby perform digital dimming.

公开(公告)号：US20230098059A1

公开(公告)日：2023-03-30

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 dessert 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：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：US11329568B2

公开(公告)日：2022-05-10

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.