公开(公告)号：US20150303816A1

公开(公告)日：2015-10-22

申请号：US14754995

申请日：2015-06-30

Applicant: STMicroelectronics S.r.l.

Inventor： Salvatore Tumminaro ,  Andrea Rapisarda ,  Alfio Pasqua ,  Marco Sammartano

IPC: H02M3/335

CPC classification number: H02M1/08 ,  H02M3/33523 ,  H02M2001/0006 ,  H02M2001/0009 ,  H02M2001/0035 ,  Y02B70/16

Abstract: A circuit includes a transformer with a primary, secondary, and auxiliary. A first control circuit actuates a first switch circuit based on a wake-up signal to cause the primary to transmit power to the secondary. A second control circuit actuates a second switch circuit based on an output voltage at the secondary being less than a threshold to generate the wake-up signal to the secondary for transmission to the auxiliary. The second switch circuit has a transistor with a source coupled to a reference node, a gate coupled to the second control circuit. A first diode has an anode coupled to the source and a cathode coupled to the drain, and blocks flow of current from the drain to the source. A second diode has an anode coupled to the substrate and a cathode coupled to the drain, and blocks flow of current from the drain to the substrate.

Abstract translation: 电路包括具有初级，次级和辅助的变压器。 第一控制电路基于唤醒信号来致动第一开关电路，以使主电源向次级发送电力。 第二控制电路基于次级处的输出电压致动第二开关电路，以小于阈值，以产生到次级的唤醒信号以传输到辅助器件。 第二开关电路具有耦合到参考节点的源极的晶体管，耦合到第二控制电路的栅极。 第一二极管具有耦合到源极的阳极和耦合到漏极的阴极，并阻止从漏极到源极的电流。 第二二极管具有耦合到衬底的阳极和耦合到漏极的阴极，并且阻挡从漏极到衬底的电流。

公开(公告)号：US20210226527A1

公开(公告)日：2021-07-22

申请号：US17151397

申请日：2021-01-18

Applicant: STMicroelectronics S.r.l.

Inventor： Alfio Pasqua ,  Salvatore Tumminaro ,  Marco Sammartano ,  Claudio Adragna

IPC: H02M1/42

Abstract: An embodiment PFC control circuit comprises a first terminal providing a drive signal to an electronic switch of a boost converter, a second terminal receiving a feedback signal indicative of an output voltage generated by the boost converter, and a third terminal connected to a compensation network. An error amplifier generates a current as a function of the voltage at the second terminal and a reference voltage, wherein an output of the error amplifier is coupled to the third terminal. A driver circuit generates the drive signal as a function of the voltage at the third terminal, and selectively activates or deactivates the generation of the drive signal as a function of a burst mode enable signal. A detection circuit generates the burst mode enable signal as a function of the voltage at the second terminal.

公开(公告)号：US20160043647A1

公开(公告)日：2016-02-11

申请号：US14813498

申请日：2015-07-30

Applicant: STMicroelectronics S.r.l.

Inventor： Andrea Rapisarda ,  Marco Sammartano ,  Salvatore Tumminaro

IPC: H02M3/335

CPC classification number: H02M3/33507 ,  H02M3/33523 ,  H02M3/33576 ,  H02M2001/0035 ,  H03K17/162 ,  Y02B70/16

Abstract: A power-supply circuit includes a transformer with primary and secondary windings, and an energy accumulator on the secondary winding. A circuit monitors the secondary winding and generates a feedback signal that is transferred by a transmission circuit through the secondary winding by selectively transferring energy from the energy accumulator. The transmission circuit includes: a) an electronic switch having a control terminal; and b) a driver circuit for driving the electronic switch. The driver circuit includes a charge-accumulation capacitor connected to the control terminal, and a charge circuit configured to draw energy from the secondary winding and charge the charge-accumulation capacitor.

Abstract translation: 电源电路包括具有初级和次级绕组的变压器，以及次级绕组上的蓄能器。 电路监测次级绕组并产生反馈信号，该反馈信号由传输电路通过次级绕组通过选择性地从能量积累器传输能量。 传输电路包括：a）具有控制端的电子开关; 和b）驱动电子开关的驱动电路。 驱动器电路包括连接到控制端子的电荷累积电容器，以及充电电路，其被配置为从次级绕组中抽取能量并对电荷累积电容器充电。

公开(公告)号：US10361633B2

公开(公告)日：2019-07-23

申请号：US15664019

申请日：2017-07-31

Applicant: STMicroelectronics S.r.l.

Inventor： Giovanni Lombardo ,  Claudio Adragna ,  Salvatore Tumminaro

IPC: H02M3/335

Abstract: An integrated circuit includes an output terminal a first input terminal is configured to receive a signal proportional to a voltage between first and second terminals of the primary winding, and a second input terminal is configured to receive a signal proportional to a current flowing through the primary winding. A quasi-resonant (QR) circuit has a first input coupled to the first terminal, and a second input coupled to an output of an oscillator circuit. A selector circuit has a first input coupled to the output of the oscillator circuit, a second input coupled to an output of the QR circuit, and a select input. An output control circuit includes a first input coupled to the second input terminal, a second input coupled to an output of the selector circuit, and an output coupled to a control terminal of the switching transistor.

公开(公告)号：US20180246556A1

公开(公告)日：2018-08-30

申请号：US15706135

申请日：2017-09-15

Applicant: STMicroelectronics S.r.l.

Inventor： Alfio Pasqua ,  Salvatore Tumminaro

IPC: G06F1/30 ,  H02J9/06 ,  H02J7/00 ,  G06F1/24 ,  H02M3/156 ,  G05F1/614

CPC classification number: G06F1/30 ,  G05F1/614 ,  G06F1/24 ,  H02J7/0052 ,  H02J7/0068 ,  H02J9/061 ,  H02J9/062 ,  H02J2007/0059 ,  H02M3/156 ,  H02M3/33507

Abstract: A control circuit for switched power supplies, for example for battery chargers, including a driving comparator of the generator of the primary current peaks generated by a power transistor that drives a load via a transformer. The aforementioned driving comparator has comparison inputs coupled to an amperometric sensor and to a circuit for determining the value of the aforementioned primary current peaks, for which the voltage applied to the load is a function of the value of the primary current peaks. The determination circuit is coupled to at least one feedback comparator and configured to regulate the value of the primary current peaks, thereby regulating the voltage applied to the load keeping the mean frequency, of the peaks close to the oscillation frequency of the clock that drives the generator.

公开(公告)号：US20170353117A1

公开(公告)日：2017-12-07

申请号：US15664019

申请日：2017-07-31

Applicant: STMicroelectronics S.r.l.

Inventor： Giovanni Lombardo ,  Claudio Adragna ,  Salvatore Tumminaro

IPC: H02M3/335

CPC classification number: H02M3/33523 ,  H02M3/33507 ,  Y02B70/1433 ,  Y10T307/826

Abstract: An integrated circuit includes an output terminal a first input terminal is configured to receive a signal proportional to a voltage between first and second terminals of the primary winding, and a second input terminal is configured to receive a signal proportional to a current flowing through the primary winding. A quasi-resonant (QR) circuit has a first input coupled to the first terminal, and a second input coupled to an output of an oscillator circuit. A selector circuit has a first input coupled to the output of the oscillator circuit, a second input coupled to an output of the QR circuit, and a select input. An output control circuit includes a first input coupled to the second input terminal, a second input coupled to an output of the selector circuit, and an output coupled to a control terminal of the switching transistor.

公开(公告)号：US09787192B2

公开(公告)日：2017-10-10

申请号：US14813498

申请日：2015-07-30

Applicant: STMicroelectronics S.r.l.

Inventor： Andrea Rapisarda ,  Marco Sammartano ,  Salvatore Tumminaro

IPC: H02M3/335 ,  H03K17/16 ,  H02M1/00

CPC classification number: H02M3/33507 ,  H02M3/33523 ,  H02M3/33576 ,  H02M2001/0035 ,  H03K17/162 ,  Y02B70/16

Abstract: A power-supply circuit includes a transformer with primary and secondary windings, and an energy accumulator on the secondary winding. A circuit monitors the secondary winding and generates a feedback signal that is transferred by a transmission circuit through the secondary winding by selectively transferring energy from the energy accumulator. The transmission circuit includes: a) an electronic switch having a control terminal; and b) a driver circuit for driving the electronic switch. The driver circuit includes a charge-accumulation capacitor connected to the control terminal, and a charge circuit configured to draw energy from the secondary winding and charge the charge-accumulation capacitor.

公开(公告)号：US09780673B2

公开(公告)日：2017-10-03

申请号：US14157244

申请日：2014-01-16

Applicant: STMICROELECTRONICS S.r.l.

Inventor： Giovanni Lombardo ,  Claudio Adragna ,  Salvatore Tumminaro

IPC: H02M3/335

CPC classification number: H02M3/33523 ,  H02M3/33507 ,  Y02B70/1433 ,  Y10T307/826

Abstract: A control device for controlling a switching power supply adapted to convert an input voltage into an output voltage according to a switching rate of a switching element. The control device includes first control means for switching the switching element in a first working mode at a constant frequency and second control means for switching the switching element in a second working mode at a variable frequency, under a maximum frequency, in response to the detection of a predefined operative condition of the switching power supply. The control device further includes means for selecting the first working mode or the second working mode.

公开(公告)号：US20170040901A1

公开(公告)日：2017-02-09

申请号：US15298518

申请日：2016-10-20

Applicant: STMicroelectronics S.r.l.

Inventor： Salvatore Tumminaro ,  Andrea Rapisarda ,  Alfio Pasqua

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

CPC classification number: H02M3/33507 ,  H02M1/08 ,  H02M1/36 ,  H02M3/33515 ,  H02M3/33523 ,  H02M2001/0009 ,  H02M2001/0035 ,  Y02B70/16

Abstract: A switching converter converts an input signal to a regulated output signal using a switch and a transformer with a primary winding and a secondary winding. A wake up management circuit receives a transformer demagnetization signal and forces by wake up pulses the switch on when the switching converter operates in a burst mode. Sampled values of the transformer demagnetization signal are received. A setting circuit sets a first peak value of the current of the primary winding. A comparison circuit compare the sampled values with a voltage threshold and the preceding sampled value. In response thereto, the first peak value of the primary winding current is either maintained or a new peak value is set.

Abstract translation: 开关转换器使用开关和具有初级绕组和次级绕组的变压器将输入信号转换成调节输出信号。 唤醒管理电路通过唤醒脉冲接收变压器退磁信号，并在开关转换器以突发模式工作时接通。 接收变压器退磁信号的采样值。 设定电路设定初级绕组的电流的第一峰值。 比较电路将采样值与电压阈值和先前的采样值进行比较。 响应于此，初级绕组电流的第一峰值被保持或新的峰值被设定。