公开(公告)号：US06434027B1

公开(公告)日：2002-08-13

申请号：US09625714

申请日：2000-07-26

申请人： Naoto Sano ,  Shingo Kunii ,  Yasuyuki Morishima

发明人： Naoto Sano ,  Shingo Kunii ,  Yasuyuki Morishima

IPC分类号： H02M3335

CPC分类号： H02M3/07 ,  H02M3/156 ,  H02M2003/071

摘要： A switching power supply which is capable of generating several different output voltages and which can be easily miniaturized by using a transformer with a small number of terminals. For example, using a transformer with four terminals and three windings that are connected in series, a rectifying-smoothing circuit having a diode and a capacitor is connected to a connection point of the collector of a switching transistor and the windings. A further pair of rectifying-smoothing circuits having diodes and capacitors is commonly connected to one end of the windings, according to one example. As a result thereof, three voltages are generated.

摘要翻译： 一种开关电源，其能够产生几种不同的输出电压，并且可以通过使用具有少量端子的变压器而容易地小型化。 例如，使用具有串联连接的四个端子和三个绕组的变压器，具有二极管和电容器的整流平滑电路连接到开关晶体管的集电极和绕组的连接点。 根据一个示例，另外一对具有二极管和电容器的整流平滑电路通常连接到绕组的一端。 结果，产生三个电压。

公开(公告)号：US06437546B1

公开(公告)日：2002-08-20

申请号：US09981689

申请日：2001-10-15

申请人： Shingo Kunii ,  Naoto Sano

发明人： Shingo Kunii ,  Naoto Sano

IPC分类号： G05F1656

CPC分类号： H02M3/1563

摘要： A DC-to-DC converter is provided with an astable multivibrator containing a first time constant circuit for setting an ON period of an output and a second time constant circuit for setting an OFF period of the output, and provided with a switching element controlled by the output. The output voltage is controlled by changing the duty ratio of the astable multivibrator in accordance with the output voltage.

摘要翻译： DC-DC转换器具有不稳定的多谐振荡器，其包含用于设定输出的导通期间的第一时间常数电路和用于设定输出的截止周期的第二时间常数电路，并且设置有由 输出。 通过根据输出电压改变不稳定多谐振荡器的占空比来控制输出电压。

公开(公告)号：US06538492B2

公开(公告)日：2003-03-25

申请号：US09873053

申请日：2001-06-01

申请人： Naoto Sano ,  Shingo Kunii

发明人： Naoto Sano ,  Shingo Kunii

IPC分类号： H02J338

CPC分类号： G05F1/565

摘要： A power supply converts a first direct-current voltage into a second direct-current voltage and outputs the second direct-current voltage. The power supply includes a reference voltage generating circuit for generating a reference voltage, a control circuit for controlling an output voltage in accordance with the reference voltage, and a short-circuit detecting circuit for performing an output short-circuit protection operation, when short circuiting occurs at the output, by detecting the occurrence of short circuiting and by decreasing the reference voltage so that the output voltage is decreased.

摘要翻译： 电源将第一直流电压转换成第二直流电压并输出第二直流电压。 电源包括用于产生参考电压的参考电压产生电路，用于根据参考电压控制输出电压的控制电路，以及用于在短路时执行输出短路保护操作的短路检测电路 发生在输出端，通过检测短路的发生和通过降低参考电压使得输出电压降低。

公开(公告)号：US06486567B2

公开(公告)日：2002-11-26

申请号：US09985723

申请日：2001-10-15

申请人： Naoto Sano ,  Shingo Kunii

发明人： Naoto Sano ,  Shingo Kunii

IPC分类号： H02J100

CPC分类号： H02M3/158 ,  H02M2001/009 ,  Y10T307/414

摘要： A multi-output DC-DC converter includes a step-down DC-DC converter circuit which includes a switching device for switching an input DC voltage to convert it to a pulse voltage, a choke coil and a smoothing capacitor for smoothing the pulse voltage to obtain a first output lower than the input DC voltage, and a flywheel rectifying device for causing a current to flow through the choke coil when the switching device is off; and a rectifying circuit for processing and rectifying the pulse voltage in the DC-DC converter circuit to obtain a second output. Since the flywheel rectifying device is a bi-directional synchronous rectifying device which is turned on when the switching device is off, even when the load current of the first output decreases, the amplitude of the source voltage of the switching device is not reduced. Therefore, the second output obtained from the rectifying circuit always maintains a normal value.

摘要翻译： 多输出DC-DC转换器包括降压DC-DC转换器电路，其包括用于切换输入DC电压以将其转换成脉冲电压的开关装置，扼流线圈和用于使脉冲电压平滑的平滑电容器 获得低于输入直流电压的第一输出;以及飞轮整流装置，用于当切换装置关闭时使电流流过扼流线圈; 以及整流电路，用于处理和整流DC-DC转换器电路中的脉冲电压以获得第二输出。 由于飞轮整流装置是开关装置关闭时导通的双向同步整流装置，所以即使第一输出的负载电流减小，开关装置的源极电压的振幅也不会降低。 因此，从整流电路获得的第二输出总是保持正常值。

公开(公告)号：US06985369B2

公开(公告)日：2006-01-10

申请号：US10666597

申请日：2003-09-18

申请人： Shingo Kunii

发明人： Shingo Kunii

IPC分类号： H02M3/335

CPC分类号： H02M3/33523 ,  H02M2001/0006

摘要： A DC-DC converter achieves a high level of a signal superimposed in an AC manner onto the output of an insulator such as a photocoupler, and there are very few limitations in the aspects of constant design, phase correction, starting characteristics, and short-circuit protection. A secondary-side control circuit detects an output voltage, and feeds back a control signal to a drive control circuit on the primary side via a photocoupler. The photocoupler insulates the primary side of a DC-DC converter from the secondary side thereof, wherein the control signal output from the secondary-side control circuit is transmitted to the primary side. The output signal of an auxiliary power-supply circuit is superimposed in an AC manner onto the control signal via a coupling capacitor. The drive control circuit has a configuration in which a pulse control signal is applied to a switching element in order to stabilize the output voltage of a secondary-side circuit on the basis of the control signal.

摘要翻译： DC-DC转换器实现了以交流方式叠加在诸如光电耦合器之类的绝缘体的输出上的高电平的信号，并且在恒定设计，相位校正，起动特性和短路的方面几乎没有限制， 电路保护。 次级侧控制电路检测输出电压，并通过光电耦合器将控制信号反馈到初级侧的驱动控制电路。 光耦合器从其次级侧将DC-DC转换器的初级侧绝缘，其中从次级侧控制电路输出的控制信号被发送到初级侧。 辅助电源电路的输出信号通过耦合电容以交流方式叠加到控制信号上。 驱动控制电路具有这样的结构，其中脉冲控制信号被施加到开关元件，以便基于控制信号来稳定次级侧电路的输出电压。