公开(公告)号：US20100172157A1

公开(公告)日：2010-07-08

申请号：US12605637

申请日：2009-10-26

申请人： Jian CHEN ,  Koji SONOBE

发明人： Jian CHEN ,  Koji SONOBE

IPC分类号： H02M3/335

CPC分类号： H02M3/337 ,  H02M3/33592 ,  H02M2001/0032 ,  H02M2001/0058 ,  Y02B70/1475 ,  Y02B70/1491 ,  Y02B70/16

摘要： The invention provides a switching power supply device which can detect a light load state on a pulse-by-pulse basis without worsening power efficiency. In a synchronous control circuit, for each timing of the turning-on of main switching elements, the delay time Tdif of the conduction timing of internal diodes Ds determined according to the magnitude of the load LD is detected by a comparator, a reference time pulse Tsrs having a prescribed time width is generated by a load judgment circuit, and the logical product of the two is generated by an AND circuit. By this means, the load is regarded as being a light load when the delay time Tdif is longer than the reference time pulse Tsrs, and the synchronous rectification MOSFETs Qs are not turned on.

摘要翻译： 本发明提供一种开关电源装置，其可以逐脉冲地检测轻负载状态，而不会降低功率效率。 在同步控制电路中，对于主开关元件导通的每个定时，根据负载LD的大小确定的内部二极管Ds的导通定时的延迟时间Tdif由比较器检测，参考时间脉冲 具有规定时间宽度的Tsrs由负载判断电路产生，并且由AND电路产生两者的逻辑积。 通过这种方式，当延迟时间Tdif比参考时间脉冲Tsrs长时，负载被认为是轻负载，同步整流MOSFET Qs不导通。

公开(公告)号：US20100067262A1

公开(公告)日：2010-03-18

申请号：US12461593

申请日：2009-08-18

申请人： Jian Chen ,  Koji SONOBE

发明人： Jian Chen ,  Koji SONOBE

IPC分类号： H02M3/335

CPC分类号： H02M3/33592 ,  Y02B70/1433 ,  Y02B70/1475

摘要： A switching power source device for supplying power to a load includes a series resonant circuit, a plurality of main switch elements or main switch element groups for switching a current. path of the series resonant circuit, a transformer for inducing a secondary current from the series resonant circuit, a plurality of synchronous rectification switch elements for rectifying the secondary current, a maximum on width control circuit for ordering a start and a completion of a maximum on width to the synchronous rectification switch element in synchronization with a timing of turning on the main switch elements Or the main switch element groups, and a synchronous control circuit. The circuit controls an on period of the synchronous rectification switch element so as to turn on the synchronous rectification switch element in synchronization with a particular timing, and turn off in synchronization with another timing.

摘要翻译： 用于向负载供电的开关电源装置包括串联谐振电路，用于切换电流的多个主开关元件或主开关元件组。 串联谐振电路的路径，用于从串联谐振电路感应次级电流的变压器，用于整流二次电流的多个同步整流开关元件，用于排序开始和完成最大值的最大宽度控制电路 同步整流开关元件的宽度与打开主开关元件或主开关元件组的定时同步，以及同步控制电路。 电路控制同步整流开关元件的导通周期，以与特定定时同步地接通同步整流开关元件，并与另一定时同步地关断。

公开(公告)号：US20090237965A1

公开(公告)日：2009-09-24

申请号：US12407587

申请日：2009-03-19

申请人： Koji SONOBE

发明人： Koji SONOBE

IPC分类号： H02M1/36

CPC分类号： H02M1/36

摘要： A semiconductor device for switching power supply control limits the startup current supplied from a high-voltage input terminal, and prevents heat generation and combustion in case of an anomaly. A high-voltage input terminal is connected to the main winding of a transformer, and is supplied with a startup voltage upon input of a power supply to the switching power supply device. A power supply terminal is connected to a capacitor, and outputs a startup current to charge the capacitor after input of the power supply input. A startup circuit is connected between the high-voltage input terminal and the power supply terminal, and charges the capacitor while increasing the startup current with magnitude proportional to the voltage value of the power supply terminal, and after startup, turns off the startup current and supplies the power supply voltage only from the auxiliary winding of the transformer.

摘要翻译： 用于开关电源控制的半导体器件限制从高电压输入端子提供的启动电流，并且防止在异常情况下的发热和燃烧。 高压输入端子连接到变压器的主绕组，并且在向开关电源装置输入电源时提供启动电压。 电源端子连接到电容器，并且在输入电源输入之后输出启动电流以对电容器充电。 在高电压输入端子和电源端子之间连接有启动电路，并且在增加与电源端子的电压值成正比的启动电流的同时对电容器充电，并且在启动之后，关闭启动电流和 仅从变压器的辅助绕组提供电源电压。

公开(公告)号：US20110228575A1

公开(公告)日：2011-09-22

申请号：US13053884

申请日：2011-03-22

申请人： Masaru SAITO ,  Koji SONOBE

发明人： Masaru SAITO ,  Koji SONOBE

IPC分类号： H01L27/06 ,  H02M1/00

CPC分类号： H01L29/0692 ,  H01L27/098 ,  H01L29/1066 ,  H01L29/808 ,  H02M1/36

摘要： A switching power supply has a start-up circuit that includes a field effect transistor (JFET), which has a gate region (a p-type well region) formed in a surface layer of a p-type substrate and a drift region (a first n-type well region). A plurality of source regions (second n-type well regions) are formed circumferentially around the drift region. A drain region (a third n-type well region) is formed centrally of the source region. The drain region and the source regions can be formed at the same time. A metal wiring of the source electrode wiring connected to source regions is divided into at least two groups to form at least two junction field effect transistors.

摘要翻译： 开关电源具有启动电路，该启动电路包括场效应晶体管（JFET），场效应晶体管（JFET）具有形成在p型衬底的表面层中的栅极区域（p型阱区域）和漂移区域 第一n型井区）。 在漂移区域周围形成多个源极区域（第二n型阱区域）。 漏极区（第三n型阱区）形成在源区的中央。 漏极区域和源极区域可以同时形成。 连接到源极区域的源电极布线的金属布线被分成至少两个组，以形成至少两个结场效应晶体管。

公开(公告)号：US20070221963A1

公开(公告)日：2007-09-27

申请号：US11690825

申请日：2007-03-24

申请人： Masaru SAITO ,  Koji SONOBE

发明人： Masaru SAITO ,  Koji SONOBE

IPC分类号： H01L29/80

CPC分类号： H01L29/0692 ,  H01L27/098 ,  H01L29/1066 ,  H01L29/808 ,  H02M1/36

摘要： A switching power supply has a start-up circuit that includes a field effect transistor (JFET), which has a gate region (a p-type well region) formed in a surface layer of a p-type substrate and a drift region (a first n-type well region). A plurality of source regions (second n-type well regions) are formed circumferentially around the drift region. A drain region (a third n-type well region) is formed centrally of the source region. The drain region and the source regions can be formed at the same time. A metal wiring of the source electrode wiring connected to source regions is divided into at least two groups to form at least two junction field effect transistors.

摘要翻译： 开关电源具有启动电路，该启动电路包括场效应晶体管（JFET），场效应晶体管（JFET）具有形成在p型衬底的表面层中的栅极区域（p型阱区域）和漂移区域 第一n型井区）。 在漂移区域周围形成多个源极区域（第二n型阱区域）。 漏极区（第三n型阱区）形成在源区的中央。 漏极区域和源极区域可以同时形成。 连接到源极区域的源电极布线的金属布线被分成至少两个组，以形成至少两个结场效应晶体管。

公开(公告)号：US20120319177A1

公开(公告)日：2012-12-20

申请号：US13594985

申请日：2012-08-27

申请人： Masaru SAITO ,  Koji SONOBE

发明人： Masaru SAITO ,  Koji SONOBE

IPC分类号： H01L27/06

CPC分类号： H01L29/0692 ,  H01L27/098 ,  H01L29/1066 ,  H01L29/808 ,  H02M1/36

摘要： A switching power supply has a start-up circuit that includes a field effect transistor (JFET), which has a gate region (a p-type well region) formed in a surface layer of a p-type substrate and a drift region (a first n-type well region). A plurality of source regions (second n-type well regions) are formed circumferentially around the drift region. A drain region (a third n-type well region) is formed centrally of the source region. The drain region and the source regions can be formed at the same time. A metal wiring of the source electrode wiring connected to source regions is divided into at least two groups to form at least two junction field effect transistors.

摘要翻译： 开关电源具有启动电路，该启动电路包括场效应晶体管（JFET），场效应晶体管（JFET）具有形成在p型衬底的表面层中的栅极区域（p型阱区域）和漂移区域 第一n型井区）。 在漂移区域周围形成多个源极区域（第二n型阱区域）。 漏极区（第三n型阱区）形成在源区的中央。 漏极区域和源极区域可以同时形成。 连接到源极区域的源电极布线的金属布线被分成至少两个组，以形成至少两个结场效应晶体管。

公开(公告)号：US20100135050A1

公开(公告)日：2010-06-03

申请号：US12607664

申请日：2009-10-28

申请人： Koji SONOBE

发明人： Koji SONOBE

IPC分类号： H02M3/337 ,  G05F1/46 ,  H02M7/217

CPC分类号： H02M1/36 ,  H02M1/4225 ,  H02M2001/0032 ,  Y02B70/126 ,  Y02B70/16

摘要： A comparator detects whether a feedback signal of an output voltage detecting circuit for a switching power supply circuit reaches a control voltage. A comparator detects an operating state of the switching power supply circuit, which is instructed by a switching instruction signal, by comparing the instruction signal with a reference voltage. The comparators are connected to a decision circuit which outputs to a control circuit a signal instructing a normal state until the feedback signal reaches the control voltage, and thereafter a signal instructing a normal state or a stand-by state that is instructed by the switching instruction signal. Thus, the control circuit makes the switching power supply circuit operate in a normal state until the output voltage reaches the control voltage. After the output voltage reaches the control voltage, the switching power supply circuit operated in an operation state instructed by the switching instruction signal to enable stable startup.

摘要翻译： 比较器检测开关电源电路的输出电压检测电路的反馈信号是否达到控制电压。 比较器通过将指令信号与参考电压进行比较来检测开关电源电路的操作状态，该操作状态由开关指令信号指示。 比较器连接到判定电路，其向控制电路输出指示正常状态的信号，直到反馈信号达到控制电压，然后指示由切换指令指示的正常状态或待机状态的信号 信号。 因此，控制电路使开关电源电路工作在正常状态，直到输出电压达到控制电压。 在输出电压达到控制电压之后，开关电源电路在切换指令信号指示的运行状态下运行，以使稳定启动。