公开(公告)号：US20180041129A1

公开(公告)日：2018-02-08

申请号：US15637714

申请日：2017-06-29

Applicant: SANKEN ELECTRIC CO., LTD.

Inventor： Takeki SUGAHARA ,  Osamu OHTAKE

IPC: H02M3/315 ,  H02M3/335 ,  H02M1/42 ,  H02M3/337 ,  G05F1/652

CPC classification number: H02M3/33507 ,  G05F1/652 ,  H02M1/08 ,  H02M1/4225 ,  H02M3/315 ,  H02M3/335 ,  H02M3/3376 ,  H02M2001/0009 ,  H02M2001/0032 ,  H02M2001/0035 ,  H02M2001/0058 ,  H02M2007/4818

Abstract: A burst oscillation circuit operates switches in a burst oscillation mode based on a feedback signal. A first burst operation cancellation threshold voltage comparator compares a first burst operation cancellation threshold voltage set higher than a voltage of the feedback signal that a load current reaches the standby threshold and a voltage of the feedback signal, and outputs a first output signal. A second burst operation cancellation threshold voltage comparator compares a second burst operation cancellation threshold voltage set lower than the voltage of the feedback signal that the load current reaches the standby threshold and higher than a voltage of the feedback signal during a non-oscillation period of the burst oscillation operation and the voltage of the feedback signal and outputs a second output signal. A standby cancellation circuit generates a standby cancel signal to cancel the standby state based on the first and second output signal.

公开(公告)号：US20180041131A1

公开(公告)日：2018-02-08

申请号：US15670468

申请日：2017-08-07

Applicant: SANKEN ELECTRIC CO., LTD.

Inventor： Takeki SUGAHARA ,  Osamu OHTAKE

IPC: H02M3/335 ,  H02M1/08

CPC classification number: H02M3/33507 ,  G05F1/652 ,  H02M1/08 ,  H02M1/4225 ,  H02M3/315 ,  H02M3/335 ,  H02M3/3376 ,  H02M2001/0009 ,  H02M2001/0032 ,  H02M2001/0035 ,  H02M2001/0058 ,  H02M2007/4818

Abstract: A first switch and a second switch connected in series to both terminals of a DC power source. A signal generation circuit generates a feedback signal based on the DC voltage detected by the voltage detection circuit, and outputs the feedback signal, the feedback signal for turning the first and second switches on and off. A burst oscillation circuit that generates a burst oscillation signal based on a feedback signal and turns the first switch element and the second switch element on and off based on the burst oscillation signal when the standby state is detected. The burst oscillation circuit comprises a capacitor and a rapid charge circuit. When this device returns from standby state to normal state, the rapid charging circuit charges the capacitor after the feedback signal exceeds the cancellation threshold voltage.

公开(公告)号：US20170154739A1

公开(公告)日：2017-06-01

申请号：US14953023

申请日：2015-11-27

Applicant: SANKEN ELECTRIC CO., LTD.

Inventor： Takeki SUGAHARA ,  Osamu OHTAKE

IPC: H01H9/54 ,  H02M1/42 ,  H02M3/335

CPC classification number: H01H9/54 ,  H02M1/4208 ,  H02M1/4225 ,  H02M1/4241 ,  H02M3/33507 ,  H02M2001/0058 ,  H02M2001/007 ,  Y02B70/126 ,  Y02B70/1491

Abstract: A disclosed switching control circuit is a switching control circuit for performing an ON-OFF control of a switching element. The switching control circuit includes a first external terminal, a electric potential on which is controlled; a second external terminal, a electric potential on which is controlled; a passive element, which is connected between the first external terminal and the second external terminal; and a function setting circuit, which performs a function setting based on a constant of the passive element.

公开(公告)号：US20160065075A1

公开(公告)日：2016-03-03

申请号：US14749690

申请日：2015-06-25

Applicant: SANKEN ELECTRIC CO., LTD.

Inventor： Takeki SUGAHARA ,  Osamu OHTAKE

IPC: H02M3/335

CPC classification number: H02M3/3376 ,  H02M1/4225 ,  H02M2001/0009 ,  H02M2001/0035 ,  H02M2001/0058 ,  H02M2001/007 ,  Y02B70/126 ,  Y02B70/1433 ,  Y02B70/1491 ,  Y02B70/16

Abstract: First and second switch are connected in series to both terminals of a DC power source. A series circuit comprising a reactor, a primary winding of a transformer, and a capacitor connected in series, and is connected to a node between the first and second switches and one terminal of the DC power source. A rectifier smoothing circuit rectifies and smoothens a voltage generated across a secondary winding of the transformer and outputs a DC voltage. A control circuit alternately turns the first and second switches on and off. A voltage detection circuit detects the DC voltage from the rectifier smoothing circuit. A signal generation circuit generates a feedback signal from the DC voltage detected by the voltage detection circuit, and outputs the signal for turning the first and second switches on and off. A load current detection circuit detects load current contained in resonance current flowing through the capacitor.

Abstract translation: 第一和第二开关串联连接到直流电源的两端。 一种串联电路，包括电抗器，变压器的初级绕组和串联连接的电容器，并且连接到第一和第二开关之间的节点以及直流电源的一个端子。 整流器平滑电路对变压器次级绕组上产生的电压进行整流和平滑，并输出直流电压。 控制电路交替地使第一和第二开关接通和断开。 电压检测电路检测来自整流器平滑电路的直流电压。 信号发生电路根据由电压检测电路检测到的直流电压产生反馈信号，并输出用于使第一和第二开关接通和关断的信号。 负载电流检测电路检测流过电容器的谐振电流中所含的负载电流。

公开(公告)号：US20140185336A1

公开(公告)日：2014-07-03

申请号：US13729527

申请日：2012-12-28

Applicant: SANKEN ELECTRIC CO., LTD.

Inventor： Takeki SUGAHARA ,  Yoshimichi TADAMASA

IPC: H02M3/335

CPC classification number: H02M3/33523 ,  H02M2001/0032 ,  Y02B70/16

Abstract: A switching power supply apparatus includes a transformer having a primary winding, a secondary winding, and an auxiliary winding, a switching element coupled in series to the primary winding; an output circuit section generating a voltage output from power transferred from the primary winding to the secondary winding in response to a switching operation of the switching element, a feedback signal generation circuit section configured to, during a secondary side conduction period in which an electric current flows through the secondary winding, generate a feedback signal having a signal level corrected based on a length of the secondary side conduction period, from an auxiliary winding voltage induced in the auxiliary winding, and a control circuit section driving the switching element based on the feedback signal.

Abstract translation: 开关电源装置包括具有初级绕组，次级绕组和辅助绕组的变压器，与初级绕组串联耦合的开关元件; 输出电路部，其响应于所述开关元件的开关动作，生成从所述初级绕组传递到所述次级绕组的电力输出的电压;反馈信号生成电路部，其被配置为在次级侧导通期间， 流过次级绕组，从辅助绕组中感应的辅助绕组电压产生基于次级侧导通周期的长度校正的信号电平的反馈信号，以及基于反馈来驱动开关元件的控制电路部分 信号。