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    • 5. 发明申请
    • SWITCHING POWER SUPPLY DEVICE
    • 切换电源设备
    • US20100019749A1
    • 2010-01-28
    • US12510525
    • 2009-07-28
    • Goto KatsuyaTakahiro Miyazaki
    • Goto KatsuyaTakahiro Miyazaki
    • G05F1/10
    • H02M1/15H02M3/1588Y02B70/1466
    • A switching power supply device for a ripple control system that can obtain the ripple component with the necessary amplitude without using discrete elements. On capacitor Ci of CR integrator 11, a voltage is generated corresponding to the integration value of the voltage applied to inductor Lo. The ripple voltage generated on capacitor Ci has a waveform similar to that of the ripple current flowing through inductor Lo. The voltage of capacitor Ci is converted into current Iq by voltage/current converter 12, and the current is injected in resistor R3 arranged on the transmission path of output feedback voltage VFB in comparator 2. Resistor R3 generates ripple voltage (Iqxr3) corresponding to the ripple current flowing through inductor Lo. The synthetic voltage of the ripple voltage and output feedback voltage VFB is compared to reference voltage Vref.
    • 一种用于纹波控制系统的开关电源装置,其可以在不使用离散元件的情况下获得具有必要幅度的纹波分量。 在CR积分器11的电容器Ci上,产生与施加到电感器Lo的电压的积分值相对应的电压。 在电容器Ci上产生的纹波电压具有与流过电感器Lo的纹波电流相似的波形。 电容器Ci的电压通过电压/电流转换器12转换成电流Iq,并且将电流注入布置在比较器2中的输出反馈电压VFB的传输路径上的电阻器R3中。电阻器R3产生与其对应的纹波电压(Iqxr3) 纹波电流流过电感器Lo。 将纹波电压和输出反馈电压VFB的合成电压与参考电压Vref进行比较。
    • 6. 发明授权
    • DC-DC converter and DC-DC converter drive circuit
    • DC-DC转换器和DC-DC转换器驱动电路
    • US06853170B2
    • 2005-02-08
    • US10695181
    • 2003-10-28
    • Takahiro Miyazaki
    • Takahiro Miyazaki
    • H02M3/155H02M3/156G05F1/56
    • H02M3/156H02M3/1582H02M2001/0022H02M2001/0025
    • The objective of this invention is to provide a DC-DC converter characterized by the fact that by correcting the loop gain corresponding to the switching of the operating mode, the variation in the output voltage that accompanies the switching of the operating mode can be minimized. Loop gain correction section 50 for correcting the gain of the feedback loop that controls output voltage VOUT is used, so that when the operating mode is switched in response to change in the input voltage VIN, the gain of the feedback loop is reduced by means of loop gain correction section 50. As a result, the duty ratio of pulse-width modulation signal VPWM1 output from pulse-width modulation portion 20 is decreased, and output voltage VOUT is controlled to be reduced. Consequently, the transient rise of output voltage VOUT that accompanies the switching of the operating mode can be avoided, the stability of the output voltage can be improved, and the influence on the load circuit can be prevented.
    • 本发明的目的是提供一种DC-DC转换器,其特征在于,通过校正与工作模式的切换相对应的环路增益,可以使伴随操作模式切换的输出电压的变化最小化。 使用用于校正控制输出电压VOUT的反馈回路的增益的环路增益校正部分50,使得当响应于输入电压VIN的变化而切换操作模式时,反馈回路的增益通过 结果,从脉冲宽度调制部20输出的脉冲宽度调制信号VPWM1的占空比减小,输出电压VOUT被控制为减小。 因此,可以避免伴随着工作模式切换的输出电压VOUT的瞬时上升,可以提高输出电压的稳定性,并且可以防止对负载电路的影响。
    • 7. 发明授权
    • Inrush current suppressing device
    • 浪涌电流抑制装置
    • US06735064B2
    • 2004-05-11
    • US10278447
    • 2002-10-23
    • Takahiro Miyazaki
    • Takahiro Miyazaki
    • H02H900
    • G05F1/652Y10S323/908
    • An inrush current suppressing device capable of stabilizing inrush current suppression control to improve the reliability and quality of the control. A current limiting element limits an input current flowing to a power supply circuit in accordance with an input current limit value. A current detecting section detects the input current flowing through the current limiting element and converts the current to a voltage signal, and a sloping voltage signal generating section generates a sloping voltage signal proportional to a time elapsed after the start of power supply. An input current limiting section compares the voltage signal with the sloping voltage signal, and outputs the input current limit value for suppressing the inrush current while gradually increasing the limit value with rise in the sloping voltage signal during a period in which the voltage signal is higher in level than the sloping voltage signal after the start of power supply.
    • 一种能够稳定浪涌电流抑制控制以提高控制的可靠性和质量的浪涌电流抑制装置。 限流元件根据输入电流限制值限制流向电源电路的输入电流。 电流检测部分检测流过限流元件的输入电流并将电流转换为电压信号,并且倾斜电压信号产生部分产生与电源开始之后经过的时间成正比的倾斜电压信号。 输入电流限制部分将电压信号与倾斜电压信号进行比较,并输出用于抑制浪涌电流的输入电流限制值,同时在电压信号较高的时段期间随着斜坡电压信号的上升而逐渐增加极限值 在电源开始后的倾斜电压信号的电平。
    • 9. 发明申请
    • BUCK CONVERTER
    • BUCK转换器
    • US20100315055A1
    • 2010-12-16
    • US12816665
    • 2010-06-16
    • Takahiro Miyazaki
    • Takahiro Miyazaki
    • G05F1/00
    • H02M1/12H02M3/1588Y02B70/1466
    • A buck converter and a switching regulator capable of suppressing a ripple voltage under light load conditions. The buck converter has NMOS transistors QN2 and QN3 that are connected in series between input voltage VIN and the ground, inductor L1 that is connected to node SW where transistors QN2 and QN3 are connected, comparator COMP2 that compares respective voltages of node N1 and node N2 so as to decide on time of transistor QN2, and current detection circuit 100 that detects reverse current Ig flowing to the ground from inductor L1 via node SW and transistor QN3. When current detection circuit 100 detects reverse current Ig, voltage of node N1 of comparator COMP2 is reduced by variable circuit 110 in order to reduce the on time of transistor QN2.
    • 降压转换器和能够在轻负载条件下抑制纹波电压的开关稳压器。 降压转换器具有串联连接在输入电压VIN和接地电感L1之间的NMOS晶体管QN2和QN3,电感L1与晶体管QN2和QN3连接的节点SW连接,比较器COMP2比较节点N1和节点N2的各个电压 从而决定晶体管QN2的时间以及检测从电感器L1经由节点SW和晶体管QN3流向地的反向电流Ig的电流检测电路100。 当电流检测电路100检测到反向电流Ig时,可变电路110减小比较器COMP2的节点N1的电压,以减小晶体管QN2的接通时间。