专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明申请

US20060226822A1 Input current sensing AVP method for future VRM 失效
公开(公告)号：US20060226822A1
公开(公告)日：2006-10-12
申请号：US11094433
申请日：2005-03-31
申请人： Ming Xu , Fred Lee , Jinghai Zhou
发明人： Ming Xu , Fred Lee , Jinghai Zhou
IPC分类号： G05F1/00
CPC分类号： H02M3/1588 , H02M2001/0009 , Y02B70/1466
摘要： A voltage converter provides a desired voltage droop with load while avoiding output current sensing and active control/feedback circuits and avoiding excessive power dissipation from passive components by placing a sensing resistor in the low current, switched input circuit of the voltage converter. Therefore, the resistor conducts only when a switch controlling voltage conversion is conductive, generally at very low duty cycle and low current.

2. 发明申请

US20070090915A1 MULTIPHASE VOLTAGE REGULATOR HAVING COUPLED INDUCTORS WITH REDUCED WINDING RESISTANCE 有权
标题翻译：具有降低耐绕电阻性的耦合电感器的多相电压调节器
公开(公告)号：US20070090915A1
公开(公告)日：2007-04-26
申请号：US11257404
申请日：2005-10-25
申请人： Jinghai Zhou , Fred Lee , Ming Xu , Yan Dong
发明人： Jinghai Zhou , Fred Lee , Ming Xu , Yan Dong
IPC分类号： H01F27/24
CPC分类号： H01F37/00 , H01F29/02 , H02M3/1584
摘要： A multiple phase buck converter or boost converter, or buck-boost converter has an inductor in each phase. A magnetic core with a unique woven topology provides inverse coupling between the inductors. The inductors can comprise straight conductors since the magnetic core has the woven topology wrapped around each inductor. The inductors have a reduced electrical resistance since they are straight and do not loop around the magnetic core. The reduced electrical resistance increases energy efficiency and improves transient response of the circuit. The magnetic core can comprise top and bottom portions that are magnetically connected. The inductors can comprise straight circuit board traces and the circuit board can have holes to accommodate the magnetic core.
摘要翻译：多相降压转换器或升压转换器或降压 - 升压转换器在每相中都有一个电感。具有独特编织拓扑的磁芯提供了电感器之间的反耦合。电感器可以包括直导体，因为磁芯具有缠绕在每个电感器周围的编织拓扑。电感器具有降低的电阻，因为它们是直的并且不环绕磁芯。降低的电阻提高了能量效率并改善了电路的瞬态响应。磁芯可以包括磁性连接的顶部和底部。电感器可以包括直线电路板迹线，并且电路板可以具有孔以容纳磁芯。

3. 发明申请

US20050184713A1 Two-stage voltage regulators with adjustable intermediate bus voltage, adjustable switching frequency, and adjustable number of active phases 失效
标题翻译：两级电压调节器，可调节中间总线电压，可调开关频率和可调节数量的有源相
公开(公告)号：US20050184713A1
公开(公告)日：2005-08-25
申请号：US11018920
申请日：2004-12-22
申请人： Ming Xu , Jinghai Zhou , Yuancheng Ren , Fred Lee , Jia Wei
发明人： Ming Xu , Jinghai Zhou , Yuancheng Ren , Fred Lee , Jia Wei
IPC分类号： G05F1/40 , H02M3/156
CPC分类号： H02M3/156 , H02M2001/0019 , H02M2001/0032 , H02M2001/007 , Y02B70/16
摘要： A two-stage power converter that dynamically adjusts to output current requirements includes a first stage regulator that provides power to a second stage regulator. The first stage can be a buck converter, and the second stage can be a multiple-phase buck converter. The output voltage of the first stage (intermediate bus voltage Vbus) is varied according to the load current to optimize conversion efficiency. To provide maximum efficiency, the Vbus voltage is increased as load current increases. The Vbus voltage provided by the first stage can be varied by duty cycle or operating frequency control. In another embodiment, the switching frequency of the second stage is varied as output current changes so that output current ripple is held constant. In an embodiment employing a multiple-phase buck converter in the second stage, the number of operating phases are varied as output current changes.
摘要翻译：动态调节输出电流要求的两级功率转换器包括为第二级调节器提供电源的第一级稳压器。第一级可以是降压转换器，第二级可以是多相降压转换器。第一级（中间总线电压Vbus）的输出电压根据负载电流而变化，以优化转换效率。为了提供最大的效率，Vbus电压随着负载电流的增加而增加。第一级提供的Vbus电压可以通过占空比或工作频率控制来改变。在另一个实施例中，当输出电流改变时，第二级的开关频率变化，使得输出电流纹波保持恒定。在采用第二级中的多相降压转换器的实施例中，随着输出电流的变化，工作阶段的数量变化。

4. 发明申请

US20060226819A1 Self-driven scheme for synchronous rectifier 有权
标题翻译：同步整流器的自驱动方案
公开(公告)号：US20060226819A1
公开(公告)日：2006-10-12
申请号：US11094438
申请日：2005-03-31
申请人： Ming Xu , Julu Sun , Jinghai Zhou , Fred Lee
发明人： Ming Xu , Julu Sun , Jinghai Zhou , Fred Lee
IPC分类号： G05F1/00
CPC分类号： H02M3/1582 , H02M3/338
摘要： A voltage converter uses a component such as a JFET or four-terminal power MOSFET having no body diode and exhibiting no body diode conduction characteristic as a synchronous rectifier to reduce switching losses and body diode conduction losses and to support high frequency switching so that use of smaller components and higher current densities can be achieved. These effects are enhanced by a self-driven circuit utilizing positive feedback to enhance switching speed and reduce switching losses which increase with switching frequency.
摘要翻译：电压转换器使用诸如JFET或不具有体二极管导通特性的JFET或四端子功率MOSFET的组件作为同步整流器来减少开关损耗和体二极管导通损耗并支持高频开关，从而使用可以实现更小的组件和更高的电流密度。这些效应通过利用正反馈的自驱动电路增强，以提高开关速度并减少开关频率增加的开关损耗。

5. 发明授权

US07071660B2 Two-stage voltage regulators with adjustable intermediate bus voltage, adjustable switching frequency, and adjustable number of active phases 失效
标题翻译：两级电压调节器，可调节中间总线电压，可调开关频率和可调节数量的有源相
公开(公告)号：US07071660B2
公开(公告)日：2006-07-04
申请号：US11018920
申请日：2004-12-22
申请人： Ming Xu , Jinghai Zhou , Yuancheng Ren , Fred C. Lee , Jia Wei
发明人： Ming Xu , Jinghai Zhou , Yuancheng Ren , Fred C. Lee , Jia Wei
IPC分类号： H02M3/158
CPC分类号： H02M3/156 , H02M2001/0019 , H02M2001/0032 , H02M2001/007 , Y02B70/16
摘要： A two-stage power converter that dynamically adjusts to output current requirements includes a first stage regulator that provides power to a second stage regulator. The first stage can be a buck converter, and the second stage can be a multiple-phase buck converter. The output voltage of the first stage (intermediate bus voltage Vbus) is varied according to the load current to optimize conversion efficiency. To provide maximum efficiency, the Vbus voltage is increased as load current increases. The Vbus voltage provided by the first stage can be varied by duty cycle or operating frequency control. In another embodiment, the switching frequency of the second stage is varied as output current changes so that output current ripple is held constant. In an embodiment employing a multiple-phase buck converter in the second stage, the number of operating phases are varied as output current changes.
摘要翻译：动态调节输出电流要求的两级功率转换器包括为第二级调节器提供电源的第一级稳压器。第一级可以是降压转换器，第二级可以是多相降压转换器。第一级（中间总线电压Vbus）的输出电压根据负载电流而变化，以优化转换效率。为了提供最大的效率，Vbus电压随着负载电流的增加而增加。第一级提供的Vbus电压可以通过占空比或工作频率控制来改变。在另一个实施例中，当输出电流改变时，第二级的开关频率变化，使得输出电流纹波保持恒定。在第二级采用多相降压转换器的实施例中，随着输出电流的变化，工作阶段的数量变化。

6. 发明授权

US06944033B1 Multi-phase interleaving isolated DC/DC converter 失效
标题翻译：多相交错隔离式DC / DC转换器
公开(公告)号：US06944033B1
公开(公告)日：2005-09-13
申请号：US10457907
申请日：2003-06-10
申请人： Ming Xu , Fred C. Lee , Jinghai Zhou
发明人： Ming Xu , Fred C. Lee , Jinghai Zhou
IPC分类号： H02M3/335
CPC分类号： H02M3/1584
摘要： A converter has a transformer with primary and secondary windings each having n coils in a series-series arrangement connected to primary and secondary sides. The primary side has n primary legs each having a top switch and a bottom switch and connected to the primary winding therebetween. The secondary side has n secondary legs, each secondary leg has a synchronous rectifier switch and an output filter inductor connected to the secondary winding therebetween. A complimentary control for the primary side comprising a gate driver transformer with primary winding in series with a DC blocking capacitor connected to a drain and a source of the top switch of each primary leg, and a gate drive transformer, for each primary leg, with secondary winding containing a leakage inductor and in series with a DC blocking capacitor and a damping resistor connected to gate and source of the secondary side synchronous rectifier.
摘要翻译： A转换器具有初级和次级绕组的变压器，每个绕组具有连接到初级和次级侧的串联布置的n个线圈。初级侧具有n个主脚，每个主腿具有顶部开关和底部开关，并连接到它们之间的初级绕组。次级侧具有n个辅助支路，每个辅助支路具有同步整流开关和连接到它们之间的次级绕组的输出滤波电感器。对于初级侧的补偿控制包括具有初级绕组的栅极驱动器变压器，其与连接到每个主支脚的顶部开关的漏极和源极的隔直流电容器串联，以及用于每个主支路的栅极驱动变压器，具有次级绕组包含一个漏电感器，并与一个隔直流电容器和一个连接到次级侧同步整流器的栅极和源极的阻尼电阻串联。

7. 发明授权

US07605572B2 Input current sensing AVP method for future VRM 失效
标题翻译：用于未来VRM的输入电流感测AVP方法
公开(公告)号：US07605572B2
公开(公告)日：2009-10-20
申请号：US11094433
申请日：2005-03-31
申请人： Ming Xu , Fred C. Lee , Jinghai Zhou
发明人： Ming Xu , Fred C. Lee , Jinghai Zhou
IPC分类号： G05F1/00 , G05F1/569
CPC分类号： H02M3/1588 , H02M2001/0009 , Y02B70/1466
摘要： A voltage converter provides a desired voltage droop with load while avoiding output current sensing and active control/feedback circuits and avoiding excessive power dissipation from passive components by placing a sensing resistor in the low current, switched input circuit of the voltage converter. Therefore, the resistor conducts only when a switch controlling voltage conversion is conductive, generally at very low duty cycle and low current.
摘要翻译：电压转换器提供所需的负载电压下降，同时避免输出电流检测和主动控制/反馈电路，并通过将感测电阻放置在电压转换器的低电流切换输入电路中，避免过多的功率耗散。因此，只有当开关控制电压转换导通时，电阻器才会导通，通常在非常低的占空比和低电流下。

8. 发明授权

US07265525B2 Self-driven scheme for synchronous rectifier having no body diode 有权
标题翻译：不带体二极管的同步整流器的自驱动方案
公开(公告)号：US07265525B2
公开(公告)日：2007-09-04
申请号：US11094438
申请日：2005-03-31
申请人： Ming Xu , Julu Sun , Jinghai Zhou , Fred C. Lee
发明人： Ming Xu , Julu Sun , Jinghai Zhou , Fred C. Lee
IPC分类号： G05F1/59
CPC分类号： H02M3/1582 , H02M3/338
摘要： A voltage converter uses a component such as a JFET or four-terminal power MOSFET having no body diode and exhibiting no body diode conduction characteristic as a synchronous rectifier to reduce switching losses and body diode conduction losses and to support high frequency switching so that use of smaller components and higher current densities can be achieved. These effects are enhanced by a self-driven circuit utilizing positive feedback to enhance switching speed and reduce switching losses which increase with switching frequency.
摘要翻译：电压转换器使用诸如JFET或不具有体二极管导通特性的JFET或四端子功率MOSFET的组件作为同步整流器来减少开关损耗和体二极管导通损耗并支持高频开关，从而使用可以实现更小的组件和更高的电流密度。这些效应通过利用正反馈的自驱动电路增强，以提高开关速度并减少开关频率增加的开关损耗。

9. 发明授权

US07199695B1 Multiphase voltage regulator having coupled inductors with reduced winding resistance 有权
标题翻译：具有耦合电感器的多相电压调节器具有降低的绕组电阻
公开(公告)号：US07199695B1
公开(公告)日：2007-04-03
申请号：US11257404
申请日：2005-10-25
申请人： Jinghai Zhou , Fred C. Lee , Ming Xu , Yan Dong
发明人： Jinghai Zhou , Fred C. Lee , Ming Xu , Yan Dong
IPC分类号： H01F27/24
CPC分类号： H01F37/00 , H01F29/02 , H02M3/1584
摘要： A multiple phase buck converter or boost converter, or buck-boost converter has an inductor in each phase. A magnetic core with a unique woven topology provides inverse coupling between the inductors. The inductors can comprise straight conductors since the magnetic core has the woven topology wrapped around each inductor. The inductors have a reduced electrical resistance since they are straight and do not loop around the magnetic core. The reduced electrical resistance increases energy efficiency and improves transient response of the circuit. The magnetic core can comprise top and bottom portions that are magnetically connected. The inductors can comprise straight circuit board traces and the circuit board can have holes to accommodate the magnetic core.
摘要翻译：多相降压转换器或升压转换器或降压 - 升压转换器在每相中都有一个电感。具有独特编织拓扑的磁芯提供了电感器之间的反耦合。电感器可以包括直导体，因为磁芯具有缠绕在每个电感器周围的编织拓扑。电感器具有降低的电阻，因为它们是直的并且不环绕磁芯。降低的电阻提高了能量效率并改善了电路的瞬态响应。磁芯可以包括磁性连接的顶部和底部。电感器可以包括直线电路板迹线，并且电路板可以具有孔以容纳磁芯。

10. 发明授权

US06859372B2 Bridge-buck converter with self-driven synchronous rectifiers 有权
标题翻译：具有自驱动同步整流器的桥式降压转换器
公开(公告)号：US06859372B2
公开(公告)日：2005-02-22
申请号：US10454779
申请日：2003-06-05
申请人： Ming Xu , Fred C. Lee , Jinghai Zhou
发明人： Ming Xu , Fred C. Lee , Jinghai Zhou
IPC分类号： H02M3/335
CPC分类号： H02M3/33569
摘要： A non-isolated bridge-buck DC—DC converter has self-driven synchronous rectifiers Q5 Q6 in the buck circuits 28 30. Gate electrodes of the synchronous rectifiers Q5 Q6 are connected to midpoints 24A 24B of the bridge circuit. The voltage at the midpoints provides the necessary voltage waveform for switching the synchronous rectifiers Q5 Q6. In another aspect of the invention, voltage shift circuits 34 are provided between the midpoints and the gates of the synchronous rectifiers. The voltage shift circuits are necessary in some embodiments to make sure that the synchronous rectifiers are turned completely OFF when necessary. The present invention provides a more power efficient and less expensive technique for controlling the synchronous rectifiers compared to conventional external driver circuitry.
摘要翻译：非隔离桥式降压DC-DC转换器在降压电路28,30中具有自驱动同步整流器Q5Q6。同步整流器Q5 Q6的栅电极连接到桥式电路的中点24A 24B。中点处的电压为切换同步整流器Q5 Q6提供了必要的电压波形。在本发明的另一方面，电压移位电路34设置在同步整流器的中点和栅极之间。在一些实施例中，电压移位电路是必要的，以确保在必要时同步整流器完全关断。与传统的外部驱动器电路相比，本发明提供了一种用于控制同步整流器的更节能和更便宜的技术。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式