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。

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。