公开(公告)号：US20180219473A1

公开(公告)日：2018-08-02

申请号：US15420125

申请日：2017-01-31

申请人： Yuuta OGINO ,  Shohtaroh SOHMA

发明人： Yuuta OGINO ,  Shohtaroh SOHMA

IPC分类号： H02M1/42 ,  H02M3/04 ,  G05F1/575 ,  H02M7/06 ,  H05B33/08

CPC分类号： H05B33/0809 ,  G05F1/575 ,  H02M3/158 ,  H02M2003/1566

摘要： A power supply apparatus of the present invention has an input terminal and an output terminal, and converts an input voltage at the input terminal into a predetermined output voltage at the output terminal. The power supply apparatus includes first and second power supply circuits and a smoothing capacitor. The first power supply circuit is coupled between the input terminal and the output terminal, and converts the input voltage into a predetermined voltage to output the predetermined voltage. The smoothing capacitor is coupled to the output terminal. The second power supply circuit outputs a predetermined voltage or current to the output terminal via the smoothing capacitor, based on a feedback signal corresponding to the predetermined output voltage.

公开(公告)号：US20140077790A1

公开(公告)日：2014-03-20

申请号：US14021092

申请日：2013-09-09

申请人： Shohtaroh Sohma

发明人： Shohtaroh Sohma

IPC分类号： H02M3/158

CPC分类号： H02M3/1588 ,  H02M1/44 ,  H02M2001/0054 ,  Y02B70/1466 ,  Y02B70/1491

摘要： A switching power supply device includes a first control circuit that turns a first switch on when first and second switches are off and a voltage at a junction node therebetween is increased to decrease a voltage across the first switch to a first threshold voltage, turns off when a first ON-period has elapsed from when the first switch is turned on, and lengthens the first ON-period as an output voltage decreases relative to a reference voltage; and a second control circuit that turns the second switch on when both switches are off and a voltage across the second switch is decreased to a second threshold voltage, turns off when a reverse current flows through the inductor, sufficient to increase the voltage at the junction node to decrease the voltage across the first switch to the first threshold voltage after the second switch is turned off.

摘要翻译： 开关电源装置包括：第一控制电路，其在第一和第二开关断开时使第一开关接通，并且其间的接点处的电压增加，以将第一开关两端的电压降低到第一阈值电压，当第 从第一开关导通开始经过第一导通时段，并且随着输出电压相对于参考电压而减小第一导通周期; 以及第二控制电路，当两个开关断开并且第二开关两端的电压降低到第二阈值电压时，使第二开关接通，当反向电流流经电感器时，该开关关断，足以增加接点处的电压 节点，在第二开关断开之后，将第一开关两端的电压降低到第一阈值电压。

公开(公告)号：US07884584B2

公开(公告)日：2011-02-08

申请号：US12487073

申请日：2009-06-18

申请人： Katsuhisa Furuse ,  Yasuhiro Ishizaka ,  Shohtaroh Sohma ,  Koichi Hagino ,  Shinichiro Yamada ,  Toshiya Murota ,  Masanobu Fukushima

发明人： Katsuhisa Furuse ,  Yasuhiro Ishizaka ,  Shohtaroh Sohma ,  Koichi Hagino ,  Shinichiro Yamada ,  Toshiya Murota ,  Masanobu Fukushima

IPC分类号： G05F1/00

CPC分类号： H02M3/157 ,  H02M2001/0025 ,  Y10S323/901

摘要： A switching power supply circuit for generating an output voltage at an output node based on an input voltage at an input node includes a reference voltage generating circuit configured to generate a reference voltage such that during an initial start-up period of the reference voltage a voltage rise rate of the reference voltage within a first predetermined period from a start point of the initial start-up period and a voltage rise rate thereof within a second predetermined period immediately preceding an end point of the initial start-up period are smaller than a voltage rise rate thereof in a period between the first predetermined period and the second predetermined period, a coil disposed between the input output nodes, and a switch circuit configured to switch on and off to control current through the coil in response to comparison between the reference voltage and a voltage proportional to the output voltage.

摘要翻译： 用于基于输入节点处的输入电压在输出节点处产生输出电压的开关电源电路包括：参考电压产生电路，被配置为产生参考电压，使得在参考电压的初始启动周期期间，电压 在初始启动周期的起始点之前的第一预定时间段内的参考电压的上升速率和在初始启动周期的结束点之前的第二预定时段内的电压上升速率小于电压 在第一预定周期和第二预定周期之间的周期内的上升速率，布置在输入输出节点之间的线圈和被配置为接通和关断的开关电路，以响应于参考电压 和与输出电压成比例的电压。

公开(公告)号：US20090135632A1

公开(公告)日：2009-05-28

申请号：US12274880

申请日：2008-11-20

申请人： Shohtaroh SOHMA

发明人： Shohtaroh SOHMA

IPC分类号： H02M7/155 ,  G05F1/10

CPC分类号： H02M3/155 ,  G05F1/56 ,  H02M2001/0006

摘要： In a step-down switching regulator, a switching element is a high-voltage NMOS transistor, turned on and off based on a control signal generated by a controller, and charges an inductor with an input voltage input to an input terminal. A first drive circuit is a low-voltage MOS transistor and turns on and off the switching element based on the control signal. A voltage generator generates a predetermined first power supply voltage not greater than a withstand voltage of the low-voltage MOS transistor. A capacitor is connected in parallel with the first drive circuit and stores charge from the voltage generator to supply power to the first drive circuit. One end of the capacitor is connected to a junction node between the switching element and the inductor, and the other end of the capacitor is supplied with the first power supply voltage generated by the voltage generator.

摘要翻译： 在降压开关调节器中，开关元件是高电压NMOS晶体管，基于由控制器产生的控制信号而导通和截止，并且用输入电压输入到输入端的电感器充电。 第一驱动电路是低压MOS晶体管，并基于控制信号导通和断开开关元件。 电压发生器产生不低于低压MOS晶体管的耐压的预定的第一电源电压。 电容器与第一驱动电路并联连接，并且存储来自电压发生器的电荷以向第一驱动电路供电。 电容器的一端连接到开关元件和电感器之间的结节点，并且电容器的另一端被提供有由电压发生器产生的第一电源电压。

公开(公告)号：US10050517B1

公开(公告)日：2018-08-14

申请号：US15420125

申请日：2017-01-31

申请人： Yuuta Ogino ,  Shohtaroh Sohma

发明人： Yuuta Ogino ,  Shohtaroh Sohma

IPC分类号： G05F1/575 ,  H02M1/42 ,  H02M3/04 ,  H02M7/06 ,  H05B33/08 ,  H02M1/00

摘要： A power supply apparatus of the present invention has an input terminal and an output terminal, and converts an input voltage at the input terminal into a predetermined output voltage at the output terminal. The power supply apparatus includes first and second power supply circuits and a smoothing capacitor. The first power supply circuit is coupled between the input terminal and the output terminal, and converts the input voltage into a predetermined voltage to output the predetermined voltage. The smoothing capacitor is coupled to the output terminal. The second power supply circuit outputs a predetermined voltage or current to the output terminal via the smoothing capacitor, based on a feedback signal corresponding to the predetermined output voltage.

公开(公告)号：US08624566B2

公开(公告)日：2014-01-07

申请号：US12990607

申请日：2009-04-07

申请人： Shohtaroh Sohma

发明人： Shohtaroh Sohma

IPC分类号： G05F1/56

CPC分类号： H02M3/156

摘要： Disclosed is a current-mode control switching regulator that steps down or steps up an input voltage input to an input terminal to a predetermined constant voltage and outputs the stepped input voltage from an output terminal as an output voltage. The current-mode control switching regulator includes a switching element, an inductor, a rectifying element, an error amplification circuit unit, an oscillation circuit unit with variable oscillation frequency, a slope voltage generation circuit unit, and a switching control circuit unit.

摘要翻译： 公开了一种电流模式控制开关调节器，其将输入到输入端子的输入电压降压或升高到预定的恒定电压，并将来自输出端子的阶梯式输入电压作为输出电压输出。 电流模式控制开关调节器包括开关元件，电感器，整流元件，误差放大电路单元，具有可变振荡频率的振荡电路单元，斜坡电压产生电路单元和开关控制电路单元。

公开(公告)号：US07795849B2

公开(公告)日：2010-09-14

申请号：US11905048

申请日：2007-09-27

申请人： Shohtaroh Sohma

发明人： Shohtaroh Sohma

IPC分类号： G05F1/59

CPC分类号： H02M3/1588 ,  Y02B70/1466

摘要： A control circuit for a synchronous rectification switching regulator including an output terminal, a switching transistor, an inductor, and a synchronous rectification transistor has a control part configured to control switching of the switching transistor to charge the inductor to and set a voltage output from the output terminal to a predetermined voltage, which causes the synchronous rectification transistor to switch reversely to the switching transistor and discharge the inductor, and backflow prevention part configured to block a current flowing in the synchronous rectification transistor to prevent a backflow current that flows in a direction from the output terminal to the synchronous rectification transistor. The backflow prevention part detects a forward current and regulates timing to block the current flowing in the synchronous rectification transistor and to regulate a time period from blocking the current flowing in the synchronous rectification transistor to determining that the forward current is zero.

摘要翻译： 一种用于包括输出端子，开关晶体管，电感器和同步整流晶体管的同步整流开关调节器的控制电路，具有控制部分，其被配置为控制开关晶体管的开关以对电感器充电并设置从 输出端子达到预定电压，这使得同步整流晶体管反向切换到开关晶体管并对电感器放电;以及防逆流部分，其被配置为阻止在同步整流晶体管中流动的电流，以防止沿方向流动的回流电流 从输出端子到同步整流晶体管。 防回流部分检测正向电流并调节阻塞在同步整流晶体管中流动的电流的定时，并调节阻塞在同步整流晶体管中流动的电流以确定正向电流为零的时间段。

公开(公告)号：US20080080219A1

公开(公告)日：2008-04-03

申请号：US11905048

申请日：2007-09-27

申请人： Shohtaroh Sohma

发明人： Shohtaroh Sohma

IPC分类号： H02M7/04

CPC分类号： H02M3/1588 ,  Y02B70/1466

摘要： A control circuit for a synchronous rectification switching regulator including an output terminal, a switching transistor, an inductor, and a synchronous rectification transistor has a control part configured to control switching of the switching transistor to charge the inductor to and set a voltage output from the output terminal to a predetermined voltage, which causes the synchronous rectification transistor to switch reversely to the switching transistor and discharge the inductor, and backflow prevention part configured to block a current flowing in the synchronous rectification transistor to prevent a backflow current that flows in a direction from the output terminal to the synchronous rectification transistor. The backflow prevention part detects a forward current and regulates timing to block the current flowing in the synchronous rectification transistor and to regulate a time period from blocking the current flowing in the synchronous rectification transistor to determining that the forward current is zero.

摘要翻译： 一种用于包括输出端子，开关晶体管，电感器和同步整流晶体管的同步整流开关调节器的控制电路，具有控制部分，其被配置为控制开关晶体管的开关以对电感器充电并设置从 输出端子达到预定电压，这使得同步整流晶体管反向切换到开关晶体管并对电感器放电;以及防逆流部分，其被配置为阻止在同步整流晶体管中流动的电流，以防止沿方向流动的回流电流 从输出端子到同步整流晶体管。 防回流部分检测正向电流并调节阻塞在同步整流晶体管中流动的电流的定时，并调节阻塞在同步整流晶体管中流动的电流以确定正向电流为零的时间段。

公开(公告)号：US20240154536A1

公开(公告)日：2024-05-09

申请号：US18384454

申请日：2023-10-27

申请人： Shohtaroh SOHMA

发明人： Shohtaroh SOHMA

IPC分类号： H02M3/335 ,  H02M1/00 ,  H02M1/42

CPC分类号： H02M3/33592 ,  H02M1/0058 ,  H02M1/4241

摘要： An isolated switching power supply circuit is compact, high-efficiency, and low noise. It includes a transformer T1 which has a primary winding wound with NP turns and a secondary winding wound with NS turns, a drive switch Q1 and an active clamp switch Q2 configuring a primary side half-bridge, a boost capacitor CBULK1 that charges a discharge energy of the transformer, rectifier diodes D1 and D2 connected in series, a tank capacitor CT1, and an output capacitor COUT1. A secondary side winding voltage, when the drive switch Q1 or the active clamp switch Q2 is on, is held in the tank capacitor CT1, and by superimposing the secondary winding voltage, when the drive switch Q1 or the active clamp switch Q2 is off, on the voltage held in the tank capacitor CT1, the configuration is such that output voltage VOUT equals boosted voltage VBULK times (NS divided by NP).

公开(公告)号：US20130099846A1

公开(公告)日：2013-04-25

申请号：US13394230

申请日：2011-07-01

申请人： Shohtaroh Sohma

发明人： Shohtaroh Sohma

IPC分类号： H03L5/00

CPC分类号： H03L5/00 ,  H02M2001/0006 ,  H03K17/04206

摘要： Disclosed is a driving circuit that includes a switching element configured to be connected between an input terminal and an output node; a first power supply circuit configured to generate a first voltage; and a first driving circuit configured to drive the switching element with an output thereof using a voltage of the output node as a reference negative-side power supply voltage and the first voltage as a positive-side power supply voltage. The voltage of the output node is used as a reference negative-side power supply voltage of the first power supply.

摘要翻译： 公开了一种驱动电路，其包括被配置为连接在输入端子和输出节点之间的开关元件; 配置为产生第一电压的第一电源电路; 以及第一驱动电路，其被配置为使用输出节点的电压作为基准负侧电源电压并将第一电压作为正侧电源电压来驱动开关元件。 输出节点的电压用作第一电源的参考负侧电源电压。