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：US09595861B2

公开(公告)日：2017-03-14

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: H02M1/08 ,  H02M3/335 ,  H02M1/00

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：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：US11791728B2

公开(公告)日：2023-10-17

申请号：US17588065

申请日：2022-01-28

Applicant: STMicroelectronics S.r.l.

Inventor： Salvatore Tumminaro ,  Alfio Pasqua ,  Marco Sammartano

IPC: H02M3/158 ,  G05F1/44

CPC classification number: H02M3/158 ,  G05F1/44

Abstract: A circuit includes an electronic switch configured to be coupled intermediate a high-voltage node and low-voltage circuitry and configured to couple the low-voltage circuitry to the high-voltage node. A voltage-sensing node is configured to be coupled to the high-voltage node via a pull-up resistor. A further electronic switch can be switched to a conductive state to couple the voltage-sensing node and the control node of the electronic switch. A comparator compares a threshold with a voltage at the voltage-sensing node and causes the further electronic switch to switch on in response to the voltage at said voltage-sensing node reaching said threshold. A charge pump coupled to the current flow-path of the electronic switch is activated to the conductive state to pump electric charge from the current flow-path of the electronic switch to the control node of the electronic switch via the further electronic switch switched to the conductive state.

公开(公告)号：US11258354B2

公开(公告)日：2022-02-22

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 ,  H02M1/00

Abstract: An embodiment PFC control circuit includes 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：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。