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：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：US20150280586A1

公开(公告)日：2015-10-01

申请号：US14644290

申请日：2015-03-11

Applicant: STMicroelectronics S.r.l.

Inventor： Alfio Pasqua ,  Salvatore Tumminaro ,  Andrea Rapisarda

IPC: H02M3/335

CPC classification number: H02M3/33515 ,  H02M3/33523 ,  H02M3/3376 ,  H02M2001/0035 ,  Y02B70/16

Abstract: A power switching converter includes a switch coupled to an input terminal through a primary winding of a transformer and a control circuit configured to drive the switch to provide a regulated output signal at a secondary winding of the transformer. A wake up circuit is provided to force the switching-on of the switch when the power converter enters in a burst mode. The wake up circuit includes a transmitting section coupled to the secondary winding and a receiving section coupled to an auxiliary winding of the transformer and the control circuit. The transmitting section is configured to provide a wake up signal communicated in a wireless manner to the receiving section when the output signal falls below a threshold value.

Abstract translation: 电力开关转换器包括通过变压器的初级绕组耦合到输入端的开关和被配置为驱动开关以在变压器的次级绕组处提供调节输出信号的控制电路。 提供唤醒电路，以在功率转换器以突发模式进入时强制开关的接通。 唤醒电路包括耦合到次级绕组的发送部分和耦合到变压器的辅助绕组和控制电路的接收部分。 发送部分被配置为当输出信号下降到阈值以下时向接收部分提供以无线方式通信的唤醒信号。

公开(公告)号：US11418107B2

公开(公告)日：2022-08-16

申请号：US17020184

申请日：2020-09-14

Applicant: STMicroelectronics S.r.l.

Inventor： Alfio Pasqua ,  Salvatore Tumminaro ,  Igor Lisciandra

IPC: H02H3/247 ,  H02M1/32 ,  G01R19/165 ,  H02H3/20 ,  H02M3/335 ,  H03K5/24 ,  H02M1/00

Abstract: In an embodiment, a brown-out protection circuit includes: a monitoring terminal; a threshold generator supplying a threshold voltage; a comparator to compare a monitoring voltage at the monitoring terminal and the threshold voltage; and a logic module supplying an enable signal having a brown-in logic value and a brown-out logic value. When the enable signal is at the brown-out logic value, the logic module checks transition conditions, relating to a number of usable transitions of the monitoring voltage from lower to greater than the threshold voltage, and time conditions, relating to permanence of the monitoring voltage above the threshold voltage after a usable transition or in an aggregated manner after a plurality of consecutive usable transitions. The logic module sets the enable signal to the brown-in logic value when the transition conditions or the time conditions are met.

公开(公告)号：US20210099074A1

公开(公告)日：2021-04-01

申请号：US17020184

申请日：2020-09-14

Applicant: STMicroelectronics S.r.l.

Inventor： Alfio Pasqua ,  Salvatore Tumminaro ,  Igor Lisciandra

IPC: H02M1/32 ,  H02M3/335 ,  G01R19/165 ,  H03K5/24 ,  H02H3/20

Abstract: In an embodiment, a brown-out protection circuit includes: a monitoring terminal; a threshold generator supplying a threshold voltage; a comparator to compare a monitoring voltage at the monitoring terminal and the threshold voltage; and a logic module supplying an enable signal having a brown-in logic value and a brown-out logic value. When the enable signal is at the brown-out logic value, the logic module checks transition conditions, relating to a number of usable transitions of the monitoring voltage from lower to greater than the threshold voltage, and time conditions, relating to permanence of the monitoring voltage above the threshold voltage after a usable transition or in an aggregated manner after a plurality of consecutive usable transitions. The logic module sets the enable signal to the brown-in logic value when the transition conditions or the time conditions are met.

公开(公告)号：US20180248398A1

公开(公告)日：2018-08-30

申请号：US15726791

申请日：2017-10-06

Applicant: STMicroelectronics S.r.l.

Inventor： Alfio Pasqua ,  Michele Grande ,  Salvatore Tumminaro

IPC: H02J7/00 ,  H02J7/04

CPC classification number: H02J7/0072 ,  H02J7/0006 ,  H02J7/0024 ,  H02J7/0057 ,  H02J7/022 ,  H02J7/04 ,  H02J7/045 ,  H02J2007/0062 ,  H02M3/33507 ,  H02M2001/0032 ,  H02M2001/0038 ,  Y02B70/16

Abstract: In some embodiments, a power supply, for example, for battery chargers of mobile telephones, includes: a control circuit having a driving terminal coupled to a control terminal of a power transistor, where the power transistor drives a primary winding of a transformer of the power supply; a current sense input for detecting a first current flowing through the power transistor; and a switched signal generator coupled to the driving terminal, the switched signal having a period that is the sum of an active time, a dead time, and a demagnetization time of the transformer. The control circuit also includes a control network coupled to the current sense input and to the switched signal generator; a regulating network having a detection unit configured to detect the first current reaching a lower limit; and a variation unit configured to increment the dead time when the active time reaches the lower limit.

公开(公告)号：US09812972B2

公开(公告)日：2017-11-07

申请号：US15298518

申请日：2016-10-20

Applicant: STMicroelectronics S.r.l.

Inventor： Salvatore Tumminaro ,  Andrea Rapisarda ,  Alfio Pasqua

IPC: H02M1/36 ,  H02M3/335 ,  H02M1/08 ,  H02M1/00

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.

公开(公告)号：US09774265B2

公开(公告)日：2017-09-26

申请号：US14644290

申请日：2015-03-11

Applicant: STMicroelectronics S.r.l.

Inventor： Alfio Pasqua ,  Salvatore Tumminaro ,  Andrea Rapisarda

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

CPC classification number: H02M3/33515 ,  H02M3/33523 ,  H02M3/3376 ,  H02M2001/0035 ,  Y02B70/16

Abstract: A power switching converter includes a switch coupled to an input terminal through a primary winding of a transformer and a control circuit configured to drive the switch to provide a regulated output signal at a secondary winding of the transformer. A wake up circuit is provided to force the switching-on of the switch when the power converter enters in a burst mode. The wake up circuit includes a transmitting section coupled to the secondary winding and a receiving section coupled to an auxiliary winding of the transformer and the control circuit. The transmitting section is configured to provide a wake up signal communicated in a wireless manner to the receiving section when the output signal falls below a threshold value.

公开(公告)号：US09520769B2

公开(公告)日：2016-12-13

申请号：US14644452

申请日：2015-03-11

Applicant: STMicroelectronics S.r.l.

Inventor： Alfio Pasqua ,  Salvatore Tumminaro ,  Andrea Rapisarda

IPC: H02M1/36 ,  H02M3/335 ,  H02M1/00

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。