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1. 发明授权

US06433443B1 Switching power supply having two or more DC outputs with switching circuit provided between the outputs 有权
公开(公告)号：US06433443B1
公开(公告)日：2002-08-13
申请号：US09756954
申请日：2001-01-09
申请人： Akio Nishida , Ryota Tani , Koji Nakahira , Tomohiro Yamada
发明人： Akio Nishida , Ryota Tani , Koji Nakahira , Tomohiro Yamada
IPC分类号： H02J100
摘要： A switching power supply having two or more DC outputs includes a DC power supply, a transformer having a primary winding, at least two secondary windings, and a feedback winding, a main switching element having an off-state period and an on-state period, connected in series to the primary winding and to be turned on by a voltage generated in the feedback winding, the main switching element having a control terminal and a threshold voltage to turn the main switching element on; and a rectifying circuit connected to each secondary winding, a starting circuit which initially turns on the main switching element at startup of the power supply and a switching circuit provided between the two DC outputs, and wherein, when the switching circuit is turned on, a voltage generated in the feedback winding is lowered during the off-state period of the main switching element and a voltage to be applied to the control terminal of the main switching element is controlled so as to be less than the threshold voltage, and the main switching element is turned on by the starting circuit.

2. 发明授权

US06529392B2 Switching power supply unit 有权
公开(公告)号：US06529392B2
公开(公告)日：2003-03-04
申请号：US09948281
申请日：2001-09-06
申请人： Akio Nishida , Ryota Tani , Koji Nakahira
发明人： Akio Nishida , Ryota Tani , Koji Nakahira
IPC分类号： H02M3335
CPC分类号： H02M3/3385
摘要： An RCC type switching power supply unit with a transformer having a primary winding, a secondary winding, and a feedback winding, a main switching element receiving a feedback signal from the feedback winding and for turning on and off the current of the primary winding, a rectifying and smoothing circuit having a rectifying element and a smoothing element connected to the secondary winding, and a control circuit connected between the feedback winding and the control terminal of the main switching element. A delay circuit by which the turning on of the main switching element is prohibited for a certain period of time after the current of the rectifying element has become zero and a switching circuit by which the delay time of the delay circuit is changed by two or more stages are provided.

3. 发明授权

US06295211B1 Switching power supply unit having delay circuit for reducing switching frequency 失效
标题翻译：具有用于降低开关频率的延迟电路的开关电源单元
公开(公告)号：US06295211B1
公开(公告)日：2001-09-25
申请号：US09481490
申请日：2000-01-11
申请人： Akio Nishida , Ryota Tani , Koji Nakahira
发明人： Akio Nishida , Ryota Tani , Koji Nakahira
IPC分类号： H02M3335
CPC分类号： H02M3/3385
摘要： A switching power supply unit includes a DC power supply, a transformer having a primary winding, a secondary winding and a feedback winding, a main switching element connected in series to the primary winding, and a control circuit connected between the feedback winding and the control terminal of the main switching element, so that a DC output can be obtained. In this switching power supply unit, there are provided a voltage generating unit disposed on the primary side of the transformer to output a voltage according to a load power, and a delay circuit for reducing the switching frequency by delaying the turn-on of the main switching element according to a voltage output from the voltage generating unit thereby to prolong the OFF time of the main switching element.
摘要翻译：开关电源单元包括DC电源，具有初级绕组，次级绕组和反馈绕组的变压器，与初级绕组串联连接的主开关元件，以及连接在反馈绕组和控制器之间的控制电路端子，从而可以获得DC输出。在该开关电源单元中，设置有电压产生单元，其设置在变压器的初级侧，以根据负载功率输出电压;以及延迟电路，用于通过延迟主电源的导通来降低开关频率开关元件根据从电压产生单元输出的电压，从而延长主开关元件的断开时间。

4. 发明授权

US06552623B2 Self-oscillation type switching power supply unit 有权
公开(公告)号：US06552623B2
公开(公告)日：2003-04-22
申请号：US09983386
申请日：2001-10-22
申请人： Akio Nishida , Ryota Tani , Koji Nakahira
发明人： Akio Nishida , Ryota Tani , Koji Nakahira
IPC分类号： H03B524
CPC分类号： H02M3/3385 , H02M2001/0032 , H03L7/00 , Y02B70/16
摘要： A switching transistor is connected to a primary winding of a transformer, an oscillation frequency control circuit is connected to a feedback winding, the oscillation frequency control circuit controls a first controlling transistor, and the first controlling transistor controls the delay time when the switching transistor is turned on. The oscillation frequency control circuit is set in a first operation mode in which the above delay does not take place at the rated load, in a second operation mode in which the oscillation frequency is controlled such that the oscillation frequency becomes constant or slowly decreases at light loading and in a third operation mode in which the oscillation frequency is further decreased while a switch is switched on.

5. 发明授权

US06285566B1 RCC power supply with remote disabling of oscillation frequency control 失效
标题翻译： RCC电源具有远程禁用振荡频率控制
公开(公告)号：US06285566B1
公开(公告)日：2001-09-04
申请号：US09234958
申请日：1999-01-21
申请人： Koji Nakahira , Ryuji Okamura , Ryota Tani , Akio Nishida
发明人： Koji Nakahira , Ryuji Okamura , Ryota Tani , Akio Nishida
IPC分类号： H02M3335
CPC分类号： H02M3/3385
摘要： A self-oscillation switching power supply apparatus of the ringing choke converter type comprises a transformer T including a primary winding N1, a secondary winding N2, and a feedback winding NB; a switching transistor Q1 which oscillates in a self-oscillating fashion in response to a feedback signal from the feedback winding NB thereby turning on and off the current flowing through the primary winding; a rectifying and smoothing circuit connected to the secondary winding; an oscillation frequency control circuit including a control transistor Q3 for controlling a control signal input to the switching transistor Q1 thereby controlling the control transistor Q3 so as to extend the off-time in the self-oscillation period of the switching transistor Q1; and an oscillation frequency control disabling circuit for disabling the control of the control transistor Q3 in accordance with a remote signal.
摘要翻译：一种振铃式转换器的自振荡开关电源装置包括一个变压器T，它包括初级绕组N1，次级绕组N2和反馈绕组NB; 响应于来自反馈绕组NB的反馈信号以自振荡方式振荡的开关晶体管Q1，从而导通和关闭流过初级绕组的电流; 连接到次级绕组的整流和平滑电路; 振荡频率控制电路，包括用于控制输入到开关晶体管Q1的控制信号的控制晶体管Q3，从而控制控制晶体管Q3，以便在开关晶体管Q1的自激振荡周期中延长关断时间; 以及用于根据远程信号禁止控制晶体管Q3的控制的振荡频率控制禁止电路。

6. 发明授权

US06185112B2 Switching power supply having a frequency limiting circuit 失效
标题翻译：具有频率限制电路的开关电源
公开(公告)号：US06185112B2
公开(公告)日：2001-02-06
申请号：US09232786
申请日：1999-01-19
申请人： Akio Nishida , Koji Nakahira , Ryota Tani
发明人： Akio Nishida , Koji Nakahira , Ryota Tani
IPC分类号： H02M3335
CPC分类号： H02M3/3385 , H02M2001/0032 , Y02B70/16
摘要： A switching power supply device comprises: a transformer having a primary winding, a secondary winding and a feedback winding; a switching element connected in series with the primary winding; a controlling element connected to a control terminal of the switching element; a controlling circuit provided between the controlling element and the feedback winding; a rectifying circuit connected to the secondary winding; and a frequency limiting circuit including a charging circuit and a kick voltage absorbing circuit. The charging circuit is adapted to be charged by a voltage reverse in polarity, produced in the feedback winding. The kick voltage absorbing circuit absorbs a current developed by a kick voltage in the feedback winding, by discharge of the charging circuit, whereby the frequency limiting circuit reducing the switching frequency of the switching element by prolongation of the off-state time-period of the switching element in correspondence to a light load signal from a load when the load is light.
摘要翻译：开关电源装置包括：具有初级绕组，次级绕组和反馈绕组的变压器; 与初级绕组串联连接的开关元件; 连接到所述开关元件的控制端子的控制元件; 控制电路，设置在控制元件和反馈绕组之间; 连接到次级绕组的整流电路; 以及包括充电电路和脚踏电压吸收电路的限频电路。充电电路适于由反馈绕组中产生的极性反向电压充电。脚踏电压吸收电路通过充电电路的放电吸收由反馈绕组中的脚踏电压产生的电流，由此频率限制电路通过延长开关元件的截止状态时间段来降低开关元件的开关频率开关元件对应于来自负载的轻负载信号。

7. 发明授权

US6081433A Switching power supply apparatus 有权
标题翻译：开关电源装置
公开(公告)号：US6081433A
公开(公告)日：2000-06-27
申请号：US235655
申请日：1999-01-22
申请人： Akio Nishida , Koji Nakahira , Ryota Tani
发明人： Akio Nishida , Koji Nakahira , Ryota Tani
IPC分类号： H02M3/28 , H02M3/335 , H02M3/338
CPC分类号： H02M3/335 , H02M3/33523
摘要： A switching power supply apparatus comprises: a transformer having a primary winding, a secondary winding, and a feedback winding; a switching element connected in series with the primary winding; a control circuit provided between a control terminal of the switching element and the feedback winding; and a rectifying circuit connected to the secondary winding. The control element is provided between the control terminal of the switching element and one end of the feedback winding, and a delay circuit is connected to the control terminal of the control element.
摘要翻译：开关电源装置包括：具有初级绕组，次级绕组和反馈绕组的变压器; 与初级绕组串联连接的开关元件; 控制电路，设置在所述开关元件的控制端子与所述反馈绕组之间; 以及与次级绕组连接的整流电路。控制元件设置在开关元件的控制端子和反馈绕组的一端之间，并且延迟电路连接到控制元件的控制端子。

8. 发明授权

US6160720A Switching power supply unit utilizing a voltage dropping circuit 有权
标题翻译：开关电源单元利用降压电路
公开(公告)号：US6160720A
公开(公告)日：2000-12-12
申请号：US477543
申请日：2000-01-04
申请人： Akio Nishida , Koji Nakahira
发明人： Akio Nishida , Koji Nakahira
IPC分类号： H02J1/00 , H02J9/00 , H02M3/28 , H02M3/335 , H02M3/338 , H02M7/217
CPC分类号： H02M3/3381
摘要： A switching power supply unit containing a DC power supply; a transformer having a primary winding, a secondary winding and a feedback winding, a main switching element connected in series to the primary winding to be turned on by a voltage generated at the feedback winding, and a voltage dropping circuit for dropping the output voltage obtained form the secondary winding to reduce a fly-back voltage so that the voltage of a control terminal of the main switching element is maintained at a lower value than a threshold voltage of the main switching element.
摘要翻译：一种包含直流电源的开关电源单元; 具有初级绕组，次级绕组和反馈绕组的变压器，通过在反馈绕组产生的电压而与初级绕组串联连接的主开关元件和用于降低所获得的输出电压的降压电路形成次级绕组以减小回扫电压，使得主开关元件的控制端子的电压保持在比主开关元件的阈值电压低的值。

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