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    Dc/dc converter and game apparatus using the same
    52.
    发明专利
    Dc/dc converter and game apparatus using the same 有权
    DC / DC转换器和游戏机使用它

    公开(公告)号：JP2014087185A

    公开(公告)日：2014-05-12

    申请号：JP2012235020

    申请日：2012-10-24

    Applicant: Sony Computer Entertainment Inc ,  株式会社ソニー・コンピュータエンタテインメント

    Inventor： SASAO KAZUKI ,  MITSUI KAZUAKI

    IPC: H02M3/155

    CPC classification number: H02M3/1588 ,  H02M3/1584 ,  H02M2003/1586 ,  Y02B70/1466

    Abstract: PROBLEM TO BE SOLVED: To provide a DC/DC converter capable of controlling the ripple amount of the output voltage not to increase when switching the number of driving phases.SOLUTION: Each of N (N: an integer more than 2) switching circuits SW1-SWN generates switching voltages Vsw1-VswN respectively on each switching node according to input pulse signals. A phase controller 16 dynamically switches the number of driving phases K (K: an integer smaller than N) according to the state of a DC/DC converter 2. A pulse modulator 20 generates a pulse signal Sthe frequency of which changes according to the number of driving phases K. A distribution section 22 selects K switching circuits from the N switching circuits SW1-SWN and distributes pulse signals S-Sto each of selected K switching circuits with a phase difference of (360/K) degree.

    Abstract translation: 要解决的问题：提供一种DC / DC转换器，其能够在切换驱动相位数时控制输出电压的纹波量不增加。解决方案：N（N：大于2的整数）开关电路SW1 -SWN根据输入脉冲信号分别在每个开关节点上产生开关电压Vsw1-VswN。 相位控制器16根据DC / DC转换器2的状态动态地切换驱动相位K的数量（K：小于N的整数）。脉冲调制器20产生根据数字变化的脉冲信号Sthe频率 分配部分22从N个切换电路SW1-SWN中选择K个开关电路，并且分配具有（360 / K）相位差的所选择的K个开关电路中的每一个的脉冲信号S-Sto。

    ＤＣ−ＤＣコンバータ
    55.
    发明专利
    ＤＣ−ＤＣコンバータ 有权

    公开(公告)号：JPWO2012042942A1

    公开(公告)日：2014-02-06

    申请号：JP2012536238

    申请日：2011-03-24

    Applicant: 株式会社村田製作所

    Inventor： 元規 村瀬 ,  元規 村瀬

    IPC: H02M3/155

    CPC classification number: G05F1/595 ,  H02M3/1588 ,  Y02B70/1466

    Abstract: DC−DCコンバータ(301)は、主スイッチ素子(Q11)、従スイッチ素子(Q12)、インダクタ(L1)及びキャパシタ(C1)によって降圧チョッパー動作する。従スイッチ制御信号発生回路(60)は、PGATE信号が“L”レベルのとき、内部のキャパシタを、電源入力部(Vi)の電圧Viと電源出力部(Vo)の電圧Voとの差に比例した電圧(Vo-Vi)で放電し、NGATE信号が“H”レベルのとき、内部のキャパシタを、電源出力部(Vo)の電圧Voに比例した電圧で充電する。このキャパシタの電圧をNCTL信号として発生することにより、軽負荷時でも従スイッチ素子(Q12)が強制的にターンオフしてインダクタ電流の逆流が防止される。これにより、高速比較器及び比較器そのものを用いることなくインダクタ電流の逆流を防止して高効率なDC−DCコンバータを構成する。

    Switching regulator
    56.
    发明专利
    Switching regulator 有权

    公开(公告)号：JP5354662B2

    公开(公告)日：2013-11-27

    申请号：JP2009103236

    申请日：2009-04-21

    Applicant: セイコーインスツル株式会社

    Inventor： 公男 柴田

    IPC: H02M3/155

    CPC classification number: H02M1/36 ,  H02M1/32 ,  H02M3/1588 ,  H02M2001/0025 ,  Y02B70/1466 ,  Y10S323/901

    Abstract: Provided is a switching regulator which is capable of reducing soft start time when being activated, and prolonging battery life. The switching regulator has a configuration in which a clamp circuit for clamping a reference voltage is provided in a soft start circuit, and a predetermined period of time since the switching regulator has been activated is divided into a plurality of segments to increase the reference voltage with different slopes for each of the plurality of segments. At an early stage of the activation, the reference voltage is set to be low for preventing an inrush current from a power source, and thereafter, a rate of increase in reference voltage is gradually increased, to thereby reduce the soft start time.

    Dc-dc converter
    57.
    发明专利
    Dc-dc converter 有权

    公开(公告)号：JP5338875B2

    公开(公告)日：2013-11-13

    申请号：JP2011183464

    申请日：2011-08-25

    Applicant: 株式会社村田製作所

    Inventor： 登 加藤

    IPC: H02M3/155

    CPC classification number: H05K1/0253 ,  H01L23/642 ,  H01L23/645 ,  H01L25/16 ,  H01L2924/0002 ,  H02M3/1588 ,  Y02B70/1466 ,  H01L2924/00

    Abstract: A DC-DC converter includes an insulating substrate with an inductor provided on the top surface thereof, a switching control IC provided therein, and a ground electrode pattern provided on the bottom surface thereof. The ground electrode pattern includes a first pattern and a second pattern separated from each other and a bridge pattern that connects the first and second patterns to each other. A capacitor and the switching control IC is connected to each of the first and second patterns. The bridge pattern faces the inductor and has a smaller width than that of the first and second patterns.

    Reactor, core member, core member manufacturing method, converter and power conversion device
    58.
    发明专利
    Reactor, core member, core member manufacturing method, converter and power conversion device 有权
    反应器，核心部件，核心部件制造方法，转换器和功率转换装置

    公开(公告)号：JP2013225651A

    公开(公告)日：2013-10-31

    申请号：JP2013005740

    申请日：2013-01-16

    Applicant: Sumitomo Electric Ind Ltd ,  住友電気工業株式会社 ,  Sumitomo Wiring Syst Ltd ,  住友電装株式会社 ,  Auto Network Gijutsu Kenkyusho:Kk ,  株式会社オートネットワーク技術研究所

    Inventor： INABA KAZUHIRO

    IPC: H01F37/00 ,  H01F27/24 ,  H01F27/255 ,  H01F41/02

    CPC classification number: H01F37/00 ,  H01F3/10 ,  H01F27/255 ,  H02M3/1588 ,  Y02B70/1466

    Abstract: PROBLEM TO BE SOLVED: To provide a reactor having excellent productivity.SOLUTION: The reactor includes a coil 2 formed of wound winding 2w, and magnetic cores 3, disposed inside and outside the coil 2, for forming a closed magnetic circuit. An inner core portion 31 out of the magnetic core 3, disposed inside the coil 2, is constituted by a composite material including a magnetic substance powder and a resin. A projection contour shape of the inner core portion 31 looked from one axial direction among x-axis, y-axis and z-axis includes at least one side of inclined sides each inclining from each other axial directions. The x-axis is defined to be the axial direction of the coil 2 at the inner coil portion 31, whereas the y-axis and the z-axis are defined to be orthogonal to the x-axis and orthogonal to each other.

    Abstract translation: 要解决的问题：提供具有优异生产率的反应器。解决方案：电抗器包括由绕组绕组2w形成的线圈2和设置在线圈2内部和外部的用于形成闭合磁路的磁芯3。 配置在线圈2内部的磁芯3的内芯部31由包含磁性物质粉末和树脂的复合材料构成。 从x轴，y轴和z轴的一个轴向看的内芯部31的突起轮廓形状包括从各个轴向各自倾斜的倾斜侧的至少一侧。 x轴被限定为线圈2在内线圈部31处的轴向，而y轴和z轴被定义为与x轴正交并且彼此正交。

    Dc-dc converter of abnormal current prevention circuit
    59.
    发明专利
    Dc-dc converter of abnormal current prevention circuit 有权

    公开(公告)号：JP5326421B2

    公开(公告)日：2013-10-30

    申请号：JP2008209788

    申请日：2008-08-18

    Applicant: 富士電機株式会社

    Inventor： 保徳 中橋 ,  政幸 山田谷 ,  聰 山根

    IPC: H02M3/155 ,  G05F3/26

    CPC classification number: H02M1/32 ,  H02M3/1588 ,  Y02B70/1466

    Abstract: The voltage of a detection resistor connected to the drain of a low-side switching device is normally a negative voltage, but a positive voltage appears when a countercurrent occurs in an abnormal state. A current comparator monitors the voltage of the detection resistor, transmits high output to an AND circuit whole the voltage of the detection resistor is a negative voltage to maintain the output voltage of the current comparator in a low state when an output signal of a driver can be transmitted to the low-side switching device, and allows the output voltage of the current comparator in a low state when the voltage of the detection resistor becomes a positive voltage, thereby forcibly turning off the low-side switching device.

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