公开(公告)号：US20150318777A1

公开(公告)日：2015-11-05

申请号：US14644452

申请日：2015-03-11

Applicant: STMicroelectronics S.r.I

Inventor： Alfio Pasqua ,  Salvatore Tumminaro ,  Andrea Rapisarda

IPC: H02M1/36 ,  H02M3/335

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稳定的输出信号。 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。