公开(公告)号：US07782030B2

公开(公告)日：2010-08-24

申请号：US11783645

申请日：2007-04-11

申请人： Takashi Ryu ,  Takuya Ishii ,  Naoyuki Nakamura ,  Hirohisa Tanabe

发明人： Takashi Ryu ,  Takuya Ishii ,  Naoyuki Nakamura ,  Hirohisa Tanabe

IPC分类号： G05F1/00

CPC分类号： H02M1/40 ,  H02M3/156

摘要： The step-down converter includes: a switch; an inductor; a rectifier; a smoothing unit; and a current bypass circuit, wherein when the current flowing toward the inductor exceeds a predetermined value, the current bypass circuit forms a path through which the current flows from the input terminal to the output terminal while bypassing the inductor.

摘要翻译： 降压转换器包括：开关; 电感; 整流器 平滑单元; 以及电流旁路电路，其中当流向电感器的电流超过预定值时，电流旁路电路形成电流从输入端子流向输出端子的路径，同时绕过电感器。

公开(公告)号：US20070241725A1

公开(公告)日：2007-10-18

申请号：US11783645

申请日：2007-04-11

申请人： Takashi Ryu ,  Takuya Ishii ,  Naoyuki Nakamura ,  Hirohisa Tanabe

发明人： Takashi Ryu ,  Takuya Ishii ,  Naoyuki Nakamura ,  Hirohisa Tanabe

IPC分类号： G05F1/00

CPC分类号： H02M1/40 ,  H02M3/156

摘要： The step-down converter includes: a switch to which an input voltage is supplied via an input terminal; an inductor which is connected to the switch; rectifier means which allows a current to flow through the inductor in the OFF state of the switch; smoothing means which smoothes the current of the inductor to produce an output voltage to an output terminal; and a current bypass circuit, wherein when the current flowing toward the inductor exceeds a predetermined value, the current bypass circuit forms a path through which the current flows from the input terminal to the output terminal while bypassing the inductor.

摘要翻译： 降压转换器包括：经由输入端子向其提供输入电压的开关; 连接到开关的电感器; 整流装置，其允许电流在开关的断开状态下流过电感器; 平滑装置，其平滑电感器的电流以向输出端子产生输出电压; 以及电流旁路电路，其中当流向电感器的电流超过预定值时，电流旁路电路形成电流从输入端子流向输出端子的路径，同时绕过电感器。

公开(公告)号：US07764113B2

公开(公告)日：2010-07-27

申请号：US12169462

申请日：2008-07-08

申请人： Takashi Ryu ,  Takuya Ishii ,  Naoyuki Nakamura ,  Hirohisa Tanabe

发明人： Takashi Ryu ,  Takuya Ishii ,  Naoyuki Nakamura ,  Hirohisa Tanabe

IPC分类号： G05F1/10 ,  G05F3/02

CPC分类号： H03F1/0211 ,  H03F2200/504

摘要： A reference voltage is applied from a reference voltage generating circuit to the non-inverting input terminal of an amplifier for supplying a drive voltage to the gate terminal of an NMOS transistor, and the output voltage appearing at the source terminal of the NMOS transistor is divided by a resistor pair and applied to the inverting input terminal of the amplifier. The voltage obtained by adding a voltage equal to or higher than the voltage for sufficiently driving the NMOS transistor to the output voltage appearing at the source terminal of the NMOS transistor is generated by a charge pump circuit and supplied to the amplifier as a power supply voltage. With this configuration, the drive voltage for the NMOS transistor is suppressed to the required minimum voltage while the drive voltage is obtained securely. The power consumption in the amplifier can thus be suppressed.

摘要翻译： 参考电压从参考电压产生电路施加到放大器的非反相输入端，用于向NMOS晶体管的栅极端提供驱动电压，并且将在NMOS晶体管的源极端出现的输出电压分压 通过电阻对并施加到放大器的反相输入端。 通过加上等于或高于用于充分驱动NMOS晶体管的电压至出现在NMOS晶体管的源极端子处的输出电压的电压而获得的电压由电荷泵电路产生并作为电源电压提供给放大器 。 利用这种配置，可靠地获得驱动电压，将NMOS晶体管的驱动电压抑制到所需的最小电压。 因此可以抑制放大器的功耗。

公开(公告)号：US07081741B2

公开(公告)日：2006-07-25

申请号：US11153230

申请日：2005-06-15

申请人： Takuya Ishii ,  Takashi Ryu ,  Mikio Motomori ,  Hirohisa Tanabe ,  Masato Yoshida ,  Kazuhito Kimura ,  Tomoya Shigemi

发明人： Takuya Ishii ,  Takashi Ryu ,  Mikio Motomori ,  Hirohisa Tanabe ,  Masato Yoshida ,  Kazuhito Kimura ,  Tomoya Shigemi

IPC分类号： G05F1/577

CPC分类号： H02M3/158 ,  H02M2001/008

摘要： For controlling DC-DC converters conforming to voltage mode control system and current mode control system, in multi-output power supply, first converter section 2 is configured that first detection circuit 31 outputs first control signal, that first oscillation circuit 32 outputs first triangular wave signal and clock signal, and that first pulse-width modulation circuit 33 drives first switch by comparing first control signal with first triangular wave signal. Second converter section 4 is configured that second detection circuit 34 outputs second control signal, that second oscillation circuit 35 outputs second triangular wave signal synchronized with clock signal, that current detection circuit 36 outputs current signal of second inductor, and that second pulse-width modulation circuit 37 turns ON second switch in synchronization with clock signal and turns OFF second switch by calculating or comparing second control signal, the second triangular wave signal and current signal.

公开(公告)号：US07075275B2

公开(公告)日：2006-07-11

申请号：US11280314

申请日：2005-11-17

申请人： Mikio Motomori ,  Takuya Ishii ,  Takashi Ryu ,  Hiroki Akashi ,  Hirohisa Tanabe ,  Makoto Ishimaru ,  Tomoya Shigemi

发明人： Mikio Motomori ,  Takuya Ishii ,  Takashi Ryu ,  Hiroki Akashi ,  Hirohisa Tanabe ,  Makoto Ishimaru ,  Tomoya Shigemi

IPC分类号： G05F1/70 ,  H05B4/24

CPC分类号： H02M3/1588 ,  H02M2001/0025 ,  H02M2001/0029 ,  Y02B70/1466

摘要： A DC-DC converter has switching means which generates a continuous switching voltage having a specified period from an input voltage and outputs the generated switching voltage, output voltage generating means which receives the switching voltage at an inductor and generates an output voltage obtained by rectifying and smoothing a voltage generated in the inductor, lamp signal generating means which generates a lamp signal and outputs the generated lamp signal, and control means which performs an arithmetic operation using a current signal relative to a current flowing in the inductor, an error signal relative to the output voltage, and the lamp signal to generate a control signal for controlling the operation of the switching means and outputs the generated control signal to the switching means. The lamp signal generating means includes first signal generating means for generating a first output signal based on a frequency divided signal having first and second periods obtained by dividing the time of a clock signal having the specified period and second signal generating means for generating a second output signal having a phase 180 degrees different from the phase of the first output signal based on the frequency divided signal, generates the lamp signal which rises after being held at a constant value for a specified time period in each of the first and second periods, and outputs the generated lamp signal.

摘要翻译： DC-DC转换器具有切换装置，其从输入电压产生具有指定周期的连续切换电压，并输出产生的开关电压，输出电压产生装置，其接收电感器的开关电压，并产生通过整流和 平滑电感器中产生的电压，产生灯信号的灯信号产生装置并输出所产生的灯信号;以及控制装置，其使用相对于在电感器中流动的电流的电流信号进行算术运算，相对于 输出电压和灯信号，以产生用于控制开关装置的操作的控制信号，并将所生成的控制信号输出到开关装置。 灯信号产生装置包括第一信号产生装置，用于根据具有通过划分具有指定周期的时钟信号的时间获得的第一和第二周期的分频信号产生第一输出信号，以及用于产生第二输出的第二信号产生装置 基于分频信号具有与第一输出信号的相位相差180度的信号的信号，产生在第一和第二周期中的每个中保持恒定值一定时间后上升的灯信号，以及 输出生成的灯信号。

公开(公告)号：US20060214647A1

公开(公告)日：2006-09-28

申请号：US11384247

申请日：2006-03-21

申请人： Makoto Ishimaru ,  Takuya Ishii ,  Mikio Motomori ,  Takashi Ryu ,  Hirohisa Tanabe ,  Hiroki Akashi ,  Tomoya Shigemi

发明人： Makoto Ishimaru ,  Takuya Ishii ,  Mikio Motomori ,  Takashi Ryu ,  Hirohisa Tanabe ,  Hiroki Akashi ,  Tomoya Shigemi

IPC分类号： G05F1/00

CPC分类号： H02M3/1588 ,  H02M2001/0009 ,  Y02B70/1466

摘要： A current detector detects a current flowing through a high-side switch to output a current detection signal. When the current detection signal is lower than an error signal which is generated based on the difference between an output voltage and a reference voltage, a comparator outputs a signal. A timer outputs a signal a predetermined time after the high-side switch is turned ON. When the timer outputs the signal and the comparator outputs the signal, the high-side switch is turned OFF.

摘要翻译： 电流检测器检测流过高侧开关的电流以输出电流检测信号。 当电流检测信号低于基于输出电压和参考电压之差产生的误差信号时，比较器输出信号。 定时器在高侧开关接通之后的预定时间输出信号。 当定时器输出信号并且比较器输出信号时，高侧开关被关闭。

公开(公告)号：US07479771B2

公开(公告)日：2009-01-20

申请号：US11843896

申请日：2007-08-23

申请人： Takashi Ryu ,  Takuya Ishii ,  Mikio Motomori ,  Hirohisa Tanabe ,  Tomoya Shigemi

发明人： Takashi Ryu ,  Takuya Ishii ,  Mikio Motomori ,  Hirohisa Tanabe ,  Tomoya Shigemi

IPC分类号： G05F1/00

CPC分类号： H02M3/156 ,  H02M2001/0009

摘要： A current detection circuit of the present invention has a switching device 1; an auxiliary switching device 2; an offset voltage source comprising an offset resistor device 7 and a current source circuit 8; a compensation circuit, comprising a differential amplifier 4 and a compensation transistor 5, for adjusting the output current of the auxiliary switching device 2 so that the potential obtained by subtracting the voltage drop across the offset resistor device 7 from the output potential of the switching device 1 is equal to the output potential of the auxiliary switching device 2, being configured that the detection level of the current flowing in the switching device 1 is shifted by an offset amount.

摘要翻译： 本发明的电流检测电路具有开关元件1， 辅助切换装置2; 偏移电压源，包括偏移电阻器件7和电流源电路8; 补偿电路，包括差分放大器4和补偿晶体管5，用于调整辅助开关器件2的输出电流，使得通过从开关器件的输出电位减去偏移电阻器件7上的电压降而获得的电位 1等于辅助开关装置2的输出电位，被配置为使在开关装置1中流动的电流的检测电平偏移了偏移量。

公开(公告)号：US20080018387A1

公开(公告)日：2008-01-24

申请号：US11843896

申请日：2007-08-23

申请人： Takashi Ryu ,  Takuya Ishii ,  Mikio Motomori ,  Hirohisa Tanabe ,  Tomoya Shigemi

发明人： Takashi Ryu ,  Takuya Ishii ,  Mikio Motomori ,  Hirohisa Tanabe ,  Tomoya Shigemi

IPC分类号： G05F1/10

CPC分类号： H02M3/156 ,  H02M2001/0009

摘要： A current detection circuit of the present invention has a switching device 1; an auxiliary switching device 2; an offset voltage source comprising an offset resistor device 7 and a current source circuit 8; a compensation circuit, comprising a differential amplifier 4 and a compensation transistor 5, for adjusting the output current of the auxiliary switching device 2 so that the potential obtained by subtracting the voltage drop across the offset resistor device 7 from the output potential of the switching device 1 is equal to the output potential of the auxiliary switching device 2, being configured that the detection level of the current flowing in the switching device 1 is shifted by an offset amount.

摘要翻译： 本发明的电流检测电路具有开关元件1， 辅助切换装置2; 偏移电压源，包括偏移电阻器件7和电流源电路8; 补偿电路，包括差分放大器4和补偿晶体管5，用于调整辅助开关器件2的输出电流，使得通过从开关器件的输出电位减去偏移电阻器件7上的电压降而获得的电位 1等于辅助开关装置2的输出电位，被配置为使在开关装置1中流动的电流的检测电平偏移了偏移量。

公开(公告)号：US20070063685A1

公开(公告)日：2007-03-22

申请号：US11523699

申请日：2006-09-20

申请人： Takuya Ishii ,  Takashi Ryu ,  Hirohisa Tanabe ,  Masaaki Koto

发明人： Takuya Ishii ,  Takashi Ryu ,  Hirohisa Tanabe ,  Masaaki Koto

IPC分类号： G05F1/00

CPC分类号： H02M3/156

摘要： A DC-DC converter for converting an input DC voltage to an output DC voltage has a switch element which is turned ON/OFF by a drive signal, a reference voltage source for outputting a first reference voltage when the switch element is ON or outputting a second reference voltage when the switch element is OFF, a capacitive element having one terminal connected to the reference voltage source, a charge/discharge circuit for discharging the capacitive element when the switch element is ON and charging the capacitive element when the switch element is OFF, a switch circuit for short-circuiting the capacitive element when the switch element is turned ON and OFF, and a comparison circuit for comparing the output DC voltage or a voltage at which the output DC voltage is detected with a voltage at the other terminal of the capacitive element and generating the drive signal.

公开(公告)号：US07294994B2

公开(公告)日：2007-11-13

申请号：US11333312

申请日：2006-01-18

申请人： Takashi Ryu ,  Takuya Ishii ,  Mikio Motomori ,  Hiroki Akashi ,  Hirohisa Tanabe ,  Makoto Ishimaru ,  Tomoya Shigemi

发明人： Takashi Ryu ,  Takuya Ishii ,  Mikio Motomori ,  Hiroki Akashi ,  Hirohisa Tanabe ,  Makoto Ishimaru ,  Tomoya Shigemi

IPC分类号： G08F1/575

CPC分类号： H02M1/08 ,  H02M2001/0025

摘要： An output detection feedback section (5) for controlling the power supply output voltage of a converter unit (4) in response to an error signal Ve has an error amplifier (26) for outputting the error signal Ve, a phase compensation circuit (41), a state detection circuit (42), and a response compensation circuit (43) for setting the voltage of a capacitor (29) of the phase compensation circuit (41) to a predetermined value. When output voltage is switched, the output voltage is fixed at the predetermined value in a DC manner while a transitional response of the error signal (Ve) is accelerated, so that the output voltage is changed at a high speed to a desired value and the overshoot and undershoot are suppressed around the desired value.

摘要翻译： 用于响应于误差信号Ve控制转换器单元（4）的电源输出电压的输出检测反馈部分（5）具有用于输出误差信号Ve的误差放大器（26），相位补偿电路（41） 状态检测电路（42）以及用于将相位补偿电路（41）的电容器（29）的电压设定为规定值的响应补偿电路（43）。 当切换输出电压时，在加速误差信号（Ve）的过渡响应的同时，以直流方式将输出电压固定为规定值，使得输出电压以高速变化为期望值， 过冲和下冲被抑制在所需值附近。