公开(公告)号：US08928248B2

公开(公告)日：2015-01-06

申请号：US13762947

申请日：2013-02-08

Applicant: Panasonic Corporation

Inventor： Takuya Ishii ,  Takeshi Azuma

IPC: H05B37/02 ,  G05F1/618 ,  H02M3/158 ,  H05B33/08 ,  H02M1/00

CPC classification number: G05F1/618 ,  H02M3/1582 ,  H02M2001/0009 ,  H05B33/0818 ,  H05B37/02

Abstract: Provided is a step up/down converter, in which the inductor current can be easily detected by a simple configuration in any connecting mode of the switches. This comprises a first switch, one end of which is connected to an input power source, and the other end of which is connected to one end of the inductor, a second switch, one end of which is connected to the one end of the inductor, and the other end of which is connected to a reference potential applying unit, a third switch and a fourth switch, one end of which is connected to the other end of the inductor; a capacitor circuit element, connected between the other end of the third switch and the other end of the fourth switch, and configured to generate an output voltage for applying to a load, a detecting resistor, connected between the other end of the second switch and the other end of the third switch, and configured to detect an inductor current flowing through the inductor, and a control circuit configured to perform control from the first switch to the fourth switch based on the inductor current detected by the detecting resistor.

Abstract translation: 提供了一种升压/降压转换器，其中可以通过开关的任何连接模式中的简单配置容易地检测电感器电流。 这包括第一开关，其一端连接到输入电源，另一端连接到电感器的一端;第二开关，其一端连接到电感器的一端 并且其另一端连接到参考电位施加单元，第三开关和第四开关，其一端连接到电感器的另一端; 电容器电路元件，连接在第三开关的另一端和第四开关的另一端之间，并且被配置为产生用于施加到负载的输出电压，检测电阻器，连接在第二开关的另一端和 第三开关的另一端，并且被配置为检测流过电感器的电感器电流;以及控制电路，被配置为基于由检测电阻器检测的电感电流来执行从第一开关到第四开关的控制。

公开(公告)号：US08653863B2

公开(公告)日：2014-02-18

申请号：US13950148

申请日：2013-07-24

Applicant: Panasonic Corporation

Inventor： Tadata Hatanaka ,  Takuya Ishii

IPC: H03K4/06

CPC classification number: H03K4/502

Abstract: The sawtooth wave generation circuit includes: a switch circuit configured to switch a connection state thereof between a first connection state, in which a current from a current source is flowed from a first terminal of the output capacitor to a second terminal of the output capacitor, and a second connection state, in which a current from the current source is flowed from the second terminal of the output capacitor to the first terminal of the output capacitor; a switch control circuit configured such that, in each connection state of the switch circuit, if an output voltage has reached a predetermined threshold which is set in relation to an intermediate voltage, the switch control circuit controls the switch circuit to switch the connection state to the other connection state at least during a part of a predetermined period thereafter.

Abstract translation: 锯齿波产生电路包括：开关电路，被配置为在来自电流源的电流从输出电容器的第一端子流到输出电容器的第二端子的第一连接状态下切换其连接状态， 以及第二连接状态，其中来自电流源的电流从输出电容器的第二端子流到输出电容器的第一端子; 开关控制电路，被配置为使得在开关电路的每个连接状态下，如果输出电压已经达到相对于中间电压设定的预定阈值，则开关控制电路控制开关电路将连接状态切换到 至少在其后的预定时段的一部分期间的另一连接状态。

公开(公告)号：US09054596B2

公开(公告)日：2015-06-09

申请号：US14063857

申请日：2013-10-25

Applicant: PANASONIC CORPORATION

Inventor： Takuya Ishii

IPC: H02M1/36 ,  H02M3/158 ,  G05F1/00

CPC classification number: H02M1/36 ,  H02M3/1588 ,  Y02B70/1466

Abstract: A DC-DC converter transforms a DC input voltage to generate a DC output voltage by complementary switching control of a main switching transistor and a synchronous rectifying transistor. The DC-DC converter includes a soft-start circuit configured to generate a soft-start voltage rising from an initial voltage at start-up of the DC-DC converter; and a control circuit configured to control switching of the main switching transistor and the synchronous rectifying transistor based on the soft-start voltage to perform soft start of the DC-DC converter. The control circuit brings both of the main switching transistor and the synchronous rectifying transistor to an off state while the soft-start voltage is lower than the DC output voltage.

Abstract translation: DC-DC转换器通过主开关晶体管和同步整流晶体管的互补开关控制来变换直流输入电压以产生直流输出电压。 DC-DC转换器包括软启动电路，其被配置为产生从DC-DC转换器启动时的初始电压上升的软启动电压; 以及控制电路，被配置为基于所述软启动电压来控制所述主开关晶体管和所述同步整流晶体管的开关，以执行所述DC-DC转换器的软启动。 当软启动电压低于直流输出电压时，控制电路使主开关晶体管和同步整流晶体管都断开。

公开(公告)号：US11264890B2

公开(公告)日：2022-03-01

申请号：US16859848

申请日：2020-04-27

Applicant: PANASONIC CORPORATION

Inventor： Takuya Ishii ,  Tetsuya Mihashi ,  Ginga Katase ,  Takashi Ryu

IPC: H02M1/32 ,  H02H7/20 ,  H02H3/20 ,  H02H1/00 ,  H02H9/02 ,  H02H3/08 ,  G05F1/10

Abstract: A power supply protection circuit is a circuit that controls a protection switch provided on a power supply line connecting a direct current power supply and a load circuit. The power supply protection circuit includes: circuitry connected to the protection switch; and a controller that switches an operation state of the circuitry between a first state and a second state. The first state is an operation state in which driving of the protection switch is enabled when the protection switch is a first semiconductor switch having a control terminal connected to a semiconductor layer of a first conductivity type. The second state is an operation state in which driving of the protection switch is enabled when the protection switch is a second semiconductor switch having a control terminal connected to a semiconductor layer of a second conductivity type that is different from the semiconductor layer of a first conductivity type.