公开(公告)号：US06574081B1

公开(公告)日：2003-06-03

申请号：US09717916

申请日：2000-11-21

申请人： Tadahiko Matsumoto ,  Hitoshi Tsuji ,  Jun Nagai

发明人： Tadahiko Matsumoto ,  Hitoshi Tsuji ,  Jun Nagai

IPC分类号： H02H7125

CPC分类号： H02M1/32 ,  H02H7/1213 ,  H02M1/36 ,  H02M2001/0006

摘要： A DC-DC converter has a primary-side circuit connected to a DC power supply and a converter for converting voltage supplied by the DC power supply into an AC signal; a secondary-side circuit for rectifying and smoothing the AC signal transmitted from the primary-side circuit to supply power to a load; and an auxiliary rectifying and smoothing circuit for rectifying and smoothing the AC signal transmitted from the primary-side circuit to supply sub-power supply voltage to the converter of the primary-side circuit. The primary-side circuit further has a monitoring circuit for monitoring the sub-power supply voltage supplied from the auxiliary rectifying and smoothing circuit to the converter and a stop circuit for latching a conversion operation of the converter into an OFF state.

摘要翻译： DC-DC转换器具有连接到DC电源的初级侧电路和用于将由DC电源提供的电压转换为AC信号的转换器; 用于整流和平滑从一次侧电路发送的AC信号以向负载供电的次级侧电路; 以及辅助整流平滑电路，用于整流和平滑从初级侧电路发送的AC信号，以将副电源电压提供给初级侧电路的转换器。 初级侧电路还具有监视电路，用于监视从辅助整流和平滑电路向转换器提供的副电源电压，以及用于将转换器的转换操作锁存到OFF状态的停止电路。

公开(公告)号：US06414861B1

公开(公告)日：2002-07-02

申请号：US09726231

申请日：2000-11-29

申请人： Tadahiko Matsumoto ,  Jun Nagai ,  Takayoshi Nishiyama ,  Hitoshi Tsuji

发明人： Tadahiko Matsumoto ,  Jun Nagai ,  Takayoshi Nishiyama ,  Hitoshi Tsuji

IPC分类号： H02H7122

CPC分类号： H02M3/33592 ,  Y02B70/1475

摘要： A DC-DC converter having a switching element and a synchronous rectifier, the switching element undergoing a switching operation, the converter performing a voltage conversion of an input voltage to provide a converted output voltage at an output/input conversion ratio that is determined by the switching operation of said switching element, the converter delivering the converted output voltage to a load, said DC-DC converter further comprising: a reverse current detector for detecting a reverse current which flows from an output of the converter to an input of the converter, and a reverse current suppressor, the reverse current suppressor controlling the switching operation of said switching element so as to increase the output/input conversion ratio when a reverse current is detected by the reverse current detector, thereby suppressing the reverse current.

摘要翻译： 一种具有开关元件和同步整流器的DC-DC转换器，所述开关元件经历开关操作，所述转换器执行输入电压的电压转换，以提供由输出/输入转换比确定的输出/输入转换比的转换输出电压 所述开关元件的开关操作，所述转换器将转换的输出电压输送到负载，所述DC-DC转换器还包括：反向电流检测器，用于检测从所述转换器的输出流向所述转换器的输入的反向电流， 以及反向电流抑制器，所述反向电流抑制器控制所述开关元件的开关操作，以便当由所述反向电流检测器检测到反向电流时增加所述输出/输入转换比，从而抑制所述反向电流。

公开(公告)号：US06314005B1

公开(公告)日：2001-11-06

申请号：US09392998

申请日：1999-09-09

申请人： Koji Nishi ,  Koji Kitamura ,  Hitoshi Tsuji ,  Takayoshi Nishiyama ,  Yoshihiro Matsumoto ,  Tadahiko Matsumoto

发明人： Koji Nishi ,  Koji Kitamura ,  Hitoshi Tsuji ,  Takayoshi Nishiyama ,  Yoshihiro Matsumoto ,  Tadahiko Matsumoto

IPC分类号： H02M3335

CPC分类号： H02M3/33523

摘要： A DC-DC converter includes a primary side circuit for allowing a switching device to perform on/off operations to output energy in a primary coil of a transformer to a secondary coil. A secondary side circuit rectifies and smooths a voltage outputted from the secondary coil so as to output a DC-DC voltage. A voltage-detecting circuit rectifies and smooths a voltage outputted from a voltage-detecting coil provided in the transformer so as to output the voltage as a detected voltage corresponding to a voltage to be outputted from the secondary side circuit. A control circuit applies to the switching device a pulse control signal used for controlling on/off operation of the switching device according to the voltage outputted from the voltage-detecting circuit. A primary side current-detecting circuit converts a working current in the primary side circuit, the working current corresponding to a current in the secondary side circuit, for performing detection thereof, and for superposing the thus detected voltage corresponding to the working current with the detected voltage outputted from the voltage-detecting circuit so as to compensate for an amount of variation of an output voltage of the secondary side circuit. The variation is attributed to a variation of the working current in the secondary side circuit. A voltage determined by the superposed voltage is applied to the control circuit.

摘要翻译： DC-DC转换器包括：初级侧电路，用于允许开关器件执行导通/截止操作，以将变压器的初级线圈中的能量输出到次级线圈。 次级侧电路对从次级线圈输出的电压进行整流并平滑，以输出DC-DC电压。 电压检测电路对设置在变压器中的电压检测线圈输出的电压进行整流和平滑，以将电压输出为与从次级侧电路输出的电压对应的检测电压。 控制电路根据从电压检测电路输出的电压向开关装置施加用于控制开关装置的开关动作的脉冲控制信号。 初级侧电流检测电路将初级侧电路中的工作电流，与次级侧电路中的电流相对应的工作电流进行转换，以进行检测，并将与检测到的工作电流对应的检测到的电压叠加 从电压检测电路输出的电压，以补偿次级侧电路的输出电压的变化量。 该变化归因于二次侧电路中的工作电流的变化。 将由叠加电压确定的电压施加到控制电路。

公开(公告)号：US5892665A

公开(公告)日：1999-04-06

申请号：US111045

申请日：1998-07-07

申请人： Tadahiko Matsumoto ,  Seiichi Takahashi ,  Yoshihiro Matsumoto ,  Hitoshi Tsuji

发明人： Tadahiko Matsumoto ,  Seiichi Takahashi ,  Yoshihiro Matsumoto ,  Hitoshi Tsuji

IPC分类号： H02H9/02 ,  H02M3/28 ,  H02M3/335 ,  H02M7/122 ,  H02M7/100

CPC分类号： H02M3/33507 ,  H02M1/32

摘要： An overcurrent protection circuit provided for a switching power supply has a current detector, voltage superposition device, and circuit for reducing a driving pulse. The current detector detects a circuit current in the switching power supply and converts it to a voltage. The voltage superposition device generates a constant voltage and superposes the voltage onto the detected voltage converted by the current detector. The detected voltage onto which the constant voltage has been superposed is applied between the base and the emitter of a transistor which functions as the circuit for reducing the driving pulse. If an overcurrent flows through the switching power supply, the transistor is turned on and a current flows into the transistor. As a result, a voltage applied to a maximum-duty-cycle setting terminal of a PWM IC provided for the switching power supply and used for pulse-width-modulation control of a switch device is reduced, and the overcurrent is suppressed.

摘要翻译： 为开关电源提供的过电流保护电路具有电流检测器，电压叠加装置和用于减小驱动脉冲的电路。 电流检测器检测开关电源中的电路电流并将其转换为电压。 电压叠加装置产生恒定电压，并将电压叠加在由电流检测器转换的检测电压上。 将叠加有恒定电压的检测电压施加在用作减小驱动脉冲的电路的晶体管的基极和发射极之间。 如果过电流流过开关电源，晶体管导通，电流流入晶体管。 结果，施加到为开关电源提供并用于开关器件的脉宽调制控制的PWM IC的最大占空比设置端子的电压降低，并且过电流被抑制。

公开(公告)号：US06778412B2

公开(公告)日：2004-08-17

申请号：US10217993

申请日：2002-08-14

申请人： Jun Nagai ,  Tadahiko Matsumoto

发明人： Jun Nagai ,  Tadahiko Matsumoto

IPC分类号： H02H7125

CPC分类号： H02M3/33592 ,  H02M1/32 ,  Y02B70/1475

摘要： A DC-DC converter includes a reverse current detector for detecting a reverse current and a reverse current suppressor for increasing an input-output conversion ratio when a reverse current is detected. A choke coil increases the inductance in a current flowing region in which a very small reverse current flows and reduces the inductance in a current flowing region in which the current flowing is greater than or equal to that in a normal operation mode. In a reverse current flowing region in which the output current is negative, the DC-DC converter has unique regulation characteristics in which the amount of change in the output voltage relative to the amount of change in the output current is very large.

摘要翻译： DC-DC转换器包括用于检测反向电流的反向电流检测器和用于在检测到反向电流时增加输入 - 输出转换比的反向电流抑制器。 扼流线圈增加电流流动区域中的电感，其中非常小的反向电流流动，并且减小电流流动区域中的电流大于或等于正常操作模式中的电流。 在输出电流为负的反向电流流动区域中，DC-DC转换器具有独特的调节特性，其中输出电压相对于输出电流的变化量的变化量非常大。

公开(公告)号：US06185114B2

公开(公告)日：2001-02-06

申请号：US09507041

申请日：2000-02-18

申请人： Tadahiko Matsumoto ,  Jun Nagai

发明人： Tadahiko Matsumoto ,  Jun Nagai

IPC分类号： H02M3335

CPC分类号： H02M3/33592 ,  Y02B70/1475

摘要： An isolating DC—DC converter has a main switching element disposed on the primary side of a main transformer and a synchronous rectifier disposed on the secondary side thereof. The synchronous rectifier is turned off by synchronizing to the turn-on of the main switching element and is turned on by synchronizing to the turn-off the main switching element. The isolating DC—DC converter has a drive transformer connected to a charging circuit of the main switching element, the drive transformer outputting a pulse when an ON signal of a control pulse driving the main switching element is outputted, and an early-off drive circuit receiving the pulse of the drive transformer to turn off the synchronous rectifier before the main switching element is turned on.

摘要翻译： 隔离式DC-DC转换器具有设置在主变压器的初级侧的主开关元件和设置在其次级侧的同步整流器。 同步整流器通过与主开关元件的导通同步而断开，并且通过与主开关元件的关断同步而导通。 隔离DC-DC转换器具有连接到主开关元件的充电电路的驱动变压器，当输出驱动主开关元件的控制脉冲的导通信号时，驱动变压器输出脉冲，以及提前关断驱动电路 在主开关元件接通之前接收驱动变压器的脉冲以关闭同步整流器。

公开(公告)号：US06181579B2

公开(公告)日：2001-01-30

申请号：US09558403

申请日：2000-04-25

申请人： Jun Nagai ,  Tadahiko Matsumoto

发明人： Jun Nagai ,  Tadahiko Matsumoto

IPC分类号： H02M3335

CPC分类号： H02M3/33592 ,  Y02B70/1475

摘要： A DC—DC converter has a main switching element provided on the primary side of a transformer, a drain to source path of a synchronous rectifier on a rectification side comprising a MOSFET which switches in synchronism with the switching operation of the main switching element disposed on a line connecting one terminal side of the secondary coil of the transformer with an output terminal of a circuit on the secondary side of the transformer, and a gate of the synchronous rectifier on the rectification side connected so as to have applied thereto a voltage corresponding to an output voltage of the secondary coil via an input capacitor on the rectification side, so that a voltage generated on the primary side by switching operation of said main switching element is transmitted to the secondary side to be rectified and smoothed to output a DC voltage. A series circuit including a diode and a charge accumulating capacitor has the forward direction of the diode from the gate to source of the synchronous rectifier and is connected between the gate and source of the synchronous rectifier and a discharge device for the charge accumulating capacitor is connected in parallel with the charge accumulating capacitor.

摘要翻译： DC-DC转换器具有设置在变压器的初级侧的主开关元件，整流侧的同步整流器的漏极到源极路径，包括与设置在其上的主开关元件的开关操作同步地切换的MOSFET 将变压器的次级线圈的一个端子侧与变压器的次级侧的电路的输出端子连接的线路和整流侧的同步整流器的栅极连接，以将施加相应于 通过整流侧的输入电容器的次级线圈的输出电压，使得通过所述主开关元件的开关动作将初级侧产生的电压传输到次级侧，以进行整流和平滑以输出DC电压。 包括二极管和电荷蓄积电容器的串联电路具有从同步整流器的栅极到源极的二极管的正向，并且连接在同步整流器的栅极和源极之间，并且用于电荷累积电容器的放电装置被连接 与电荷累积电容器并联。

公开(公告)号：US06690256B2

公开(公告)日：2004-02-10

申请号：US10125556

申请日：2002-04-19

申请人： Yasuo Ohashi ,  Jun Nagai ,  Tadahiko Matsumoto

发明人： Yasuo Ohashi ,  Jun Nagai ,  Tadahiko Matsumoto

IPC分类号： H01F500

CPC分类号： H01F27/027 ,  H01F27/263

摘要： In order to improve efficiency of core rubbing operation and also to facilitate reduction in thickness of a coil device, a core-combining member includes substantially U-shaped topside and backside cover members, and a pair of core members are clamped and combined together from top and backsides by fitting the topside and backside cover members to each other. Legs of the topside cover member are provided with leg-openings formed therein while legs of the backside cover member are provided with convex parts for retaining to edges of the leg-openings so as to prevent detachment. A play clearance in the front and rear direction is provided between the convex part and an edge of the leg opening. Core rubbing is performed by relatively moving the cover members in the front and rear direction so as to integrally move the core members while maintaining the core members to be clamped. Stopper means is provided for restricting the relative displacement in the front and rear direction.

摘要翻译： 为了提高芯部摩擦操作的效率并且还有利于减小线圈装置的厚度，芯组合构件包括基本上U形的顶侧和后侧盖构件，并且一对芯构件从顶部夹紧并组合在一起 并且通过将顶侧和后侧盖构件彼此配合而形成背面。 顶侧盖构件的腿部设置有形成在其中的腿部开口，而后侧盖构件的腿部设置有用于保持在腿部开口的边缘的凸起部分，以防止脱离。 在凸起部和腿部开口的边缘之间设置有前后方向的游隙。 通过使盖部件沿前后方向相对移动，使芯部件整体移动，同时保持芯部部件被夹紧，进行芯部摩擦。 提供止动装置用于限制前后方向上的相对位移。

公开(公告)号：US06281779B1

公开(公告)日：2001-08-28

申请号：US09511346

申请日：2000-02-23

申请人： Tadahiko Matsumoto ,  Jun Nagai

发明人： Tadahiko Matsumoto ,  Jun Nagai

IPC分类号： H01F500

CPC分类号： H02M3/33576 ,  H01F19/04 ,  H01F27/2804 ,  H02M3/335 ,  H02M3/33592 ,  H02M2001/0064 ,  H05K1/144 ,  H05K1/165 ,  Y02B70/1475

摘要： A coil device having a core having an intermediate leg and at least a pair of external legs arranged at equal intervals from the intermediate leg; a first printed coil provided on a first substrate which has an intermediate hole and a pair of external holes respectively inserted in the intermediate leg and the pair of external legs of the core, the first printed coil being wound around the intermediate hole; and a second printed coil provided on a second substrate which has an intermediate hole and a pair of external holes respectively inserted in the intermediate leg and the pair of external legs of the core, the second printed coil including a pair of external printed coils which are connected in series and are respectively wound around the pair of the external holes with the same number of turns but in opposite directions.

摘要翻译： 一种线圈装置，具有芯部，该芯部具有中间腿部和至少一对外侧腿部，其相对于中间腿部布置成相等的间隔; 设置在第一基板上的第一印刷线圈，所述第一基板具有中间孔和分别插入所述中间支腿和所述芯的所述一对外部支腿的一对外部孔，所述第一印刷线圈缠绕在所述中间孔上; 以及设置在第二基板上的第二印刷线圈，所述第二印刷线圈具有分别插入所述中间支脚和所述芯体的所述一对外部支脚的中间孔和一对外部孔，所述第二印刷线圈包括一对外部印刷线圈， 分别以相同的匝数但相反的方向缠绕在一对外部的孔周围。

公开(公告)号：US06757174B2

公开(公告)日：2004-06-29

申请号：US10105777

申请日：2002-03-25

申请人： Jun Nagai ,  Yoshihiro Matsumoto ,  Takayoshi Nishiyama ,  Tadahiko Matsumoto

发明人： Jun Nagai ,  Yoshihiro Matsumoto ,  Takayoshi Nishiyama ,  Tadahiko Matsumoto

IPC分类号： H05K103

CPC分类号： H01F27/2804 ,  H01F27/292 ,  H05K1/141 ,  H05K1/165 ,  H05K3/3405 ,  H05K3/3421 ,  H05K2201/086 ,  H05K2201/09063 ,  H05K2201/10386 ,  H05K2201/10446

摘要： A switching power-supply module includes a coil pattern of a transformer or an inductor disposed on a substrate. A portion of the coil pattern projects into an edge portion of the substrate. A plurality of terminals are arranged in the substrate edge portion so that they do not touch the coil pattern. The substrate edge portion is soaked in molten solder in the production procedure in order to fix the terminals onto the substrate with solder after components are solder-connected on the substrate. For this reason, the components were previously prohibited from being mounted in the substrate edge portion, and this region has been previously considered to be a dead space. However, in the present invention, since a portion of the coil pattern projects into the substrate edge portion, dead space is minimized, and the size of the substrate, that is, of the switching power supply module is greatly reduced.

摘要翻译： 开关电源模块包括设置在基板上的变压器或电感器的线圈图案。 线圈图案的一部分突出到基板的边缘部分。 多个端子布置在基板边缘部分中，使得它们不接触线圈图案。 在制造过程中，将基板边缘部分浸入熔融焊料中，以便在将元件焊接在基板上之后将端子固定在基板上。 因此，以前，这些部件被禁止安装在基板边缘部分中，该区域以前被认为是死空间。 然而，在本发明中，由于线圈图案的一部分突出到基板边缘部分中，所以死空间最小化，并且基板，即开关电源模块的尺寸大大降低。