公开(公告)号：US20120068675A1

公开(公告)日：2012-03-22

申请号：US13200214

申请日：2011-09-21

申请人： Norihiro Kawagishi ,  Nobuaki Tsuji ,  Toshio Maejima

发明人： Norihiro Kawagishi ,  Nobuaki Tsuji ,  Toshio Maejima

IPC分类号： G05F1/46

CPC分类号： H02M3/156 ,  H02M2001/0032 ,  Y02B70/16

摘要： A voltage generation circuit includes a voltage detection circuit that generates a detection voltage according to an output voltage, a reference voltage generation circuit that generates a reference voltage which changes periodically, a comparison circuit that generates a control signal according to a result of a comparison between the detection voltage and the reference voltage, wherein control pulses each having a pulse width according to the detection voltage are sequentially appeared in the control signal, and a driving pulse generation circuit that generates a driving pulse corresponding to the control pulse and supplies the generated driving pulse to a transistor connected to a DC power source when the pulse width of the control pulse exceeds a predetermined width, and stops generating the driving pulse when the pulse width of the control pulse becomes smaller than the predetermined width.

摘要翻译： 电压产生电路包括产生根据输出电压的检测电压的电压检测电路，产生周期性变化的参考电压的基准电压产生电路，根据比较结果产生控制信号的比较电路 检测电压和参考电压，其中在控制信号中顺序出现各自具有根据检测电压的脉冲宽度的控制脉冲，以及驱动脉冲产生电路，其产生与控制脉冲相对应的驱动脉冲并提供所产生的驱动 当控制脉冲的脉冲宽度超过预定宽度时，连接到直流电源的晶体管脉冲，并且当控制脉冲的脉冲宽度变得小于预定宽度时停止产生驱动脉冲。

公开(公告)号：US20090160418A1

公开(公告)日：2009-06-25

申请号：US12327001

申请日：2008-12-03

申请人： Norihiro KAWAGISHI ,  Yuichi OKUBO

发明人： Norihiro KAWAGISHI ,  Yuichi OKUBO

IPC分类号： G05F3/16

CPC分类号： H02M3/156 ,  H02M2001/0009 ,  H02M2001/0025

摘要： A DC-DC converter includes a reference voltage generation circuit. The reference voltage generation circuit generates a reference voltage for determination of the pulse width of a drive signal to be supplied to a switching circuit. The reference voltage generation circuit includes a current sensing circuit. The current sensing circuit has a first MOS transistor, a second MOS transistor, a resistive element and an amplifier circuit.

摘要翻译： DC-DC转换器包括参考电压产生电路。 参考电压产生电路产生用于确定要提供给开关电路的驱动信号的脉冲宽度的参考电压。 参考电压产生电路包括电流检测电路。 电流感测电路具有第一MOS晶体管，第二MOS晶体管，电阻元件和放大器电路。

公开(公告)号：US20090160416A1

公开(公告)日：2009-06-25

申请号：US12333450

申请日：2008-12-12

申请人： Norihiro Kawagishi ,  Yuichi Okubo

发明人： Norihiro Kawagishi ,  Yuichi Okubo

IPC分类号： G05F1/46

CPC分类号： H02M3/156 ,  H02M2001/0025

摘要： A DC-DC converter generates an optimal slope compensation voltage in response to input and output voltages, thus capable of maintaining its operational stability even when a dynamic range of the output voltage is widen. The DC-DC converter compares an error voltage corresponding to a difference between a feedback voltage of the output voltage and a reference voltage with a ramp signal whose voltage level corresponds to a current detection signal, so as to configure an off-timing of an output transistor. A slope of the ramp signal is configured so that the ramp signal is proportional to a difference between the output voltage and the input voltage. A slope compensation circuit for generating the ramp signal includes an adding circuit for generating a slope controlling electric current corresponding to a voltage in which a voltage corresponding to the input voltage is subtracted from a voltage corresponding to the output voltage, and a capacitor electrically charged with the slope controlling current.

摘要翻译： DC-DC转换器响应于输入和输出电压产生最佳斜率补偿电压，因此即使当输出电压的动态范围变宽时也能保持其运行稳定性。 DC-DC转换器将对应于输出电压的反馈电压和参考电压之间的差的误差电压与其电压电平对应于电流检测信号的斜坡信号进行比较，以便配置输出的断开定时 晶体管。 斜坡信号的斜率被配置为使得斜坡信号与输出电压和输入电压之间的差成比例。 用于产生斜坡信号的斜坡补偿电路包括一个加法电路，用于产生一个斜率控制电流，该斜坡控制电流对应于一个电压，在该电压中，从与输出电压相对应的电压中减去对应于输入电压的电压， 斜率控制电流。

公开(公告)号：US20090153200A1

公开(公告)日：2009-06-18

申请号：US12327174

申请日：2008-12-03

申请人： Norihiro KAWAGISHI ,  Kazuyoshi ASAKAWA

发明人： Norihiro KAWAGISHI ,  Kazuyoshi ASAKAWA

IPC分类号： H03K3/00

CPC分类号： H03K17/0822

摘要： A load drive circuit which can operate at high speed with low consumption current while performing the gate-to-source over voltage protection for its load driving field-effect transistor. A Zener function device is connected between the gate and the source of the load driving field-effect transistor, and an on/off-switch circuit to supply either on-potential or off-potential to the gate of the field effect transistor is provided. The current flowing through the Zener function device when the load driving field-effect transistor is conductive is limited by the on/off-switch circuit.

摘要翻译： 一种负载驱动电路，能够以低功耗电流高速运行，同时对其负载驱动场效应晶体管进行栅极到源极过电压保护。 齐纳功能器件连接在负载驱动场效应晶体管的栅极和源极之间，并且提供了向场效应晶体管的栅极提供导通或截止电位的导通/截止开关电路。 当负载驱动场效应晶体管导通时，流过齐纳函数器件的电流受到导通/截止开关电路的限制。

公开(公告)号：US20090153122A1

公开(公告)日：2009-06-18

申请号：US12326947

申请日：2008-12-03

申请人： Norihiro KAWAGISHI ,  Kazuyoshi Asakawa

发明人： Norihiro KAWAGISHI ,  Kazuyoshi Asakawa

IPC分类号： G05F1/00

CPC分类号： G05F1/56

摘要： A dropper-type regulator capable of providing a soft start function using a simple circuit configuration. An exemplary regulator includes a first FET having a relatively high current driving capability and a second FET having a relatively low current driving capability are provided in parallel between an input terminal and an output terminal. For a predetermined time immediately after power activation, only the second FET is driven, thereby preventing a large rush current. A switch circuit connected to the gate of the first FET is operated after the predetermined period of time, thereby supplying a driving voltage to the gate of the first FET.

摘要翻译： 一种能够使用简单电路配置提供软启动功能的滴管式调节器。 示例性调节器包括具有相对高的电流驱动能力的第一FET和具有相对低的电流驱动能力的第二FET并联设置在输入端子和输出端子之间。 在电源激活之后的预定时间内，仅驱动第二FET，从而防止大的冲击电流。 连接到第一FET的栅极的开关电路在预定时间段之后被操作，从而向第一FET的栅极提供驱动电压。