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1. 发明授权

US07583065B2 Hybrid filter for high slew rate output current application 失效
公开(公告)号：US07583065B2
公开(公告)日：2009-09-01
申请号：US12401815
申请日：2009-03-11
申请人： Ming Xu , Yuancheng Ren , Fred C. Lee , Andrew P. Schmit
发明人： Ming Xu , Yuancheng Ren , Fred C. Lee , Andrew P. Schmit
IPC分类号： G05F1/614 , G05F1/563
CPC分类号： H02M3/158 , H02M2001/0045
摘要： An active linear regulator circuit in parallel with a filter capacitor of a switching voltage regulator injects current to a load only when the switching regulator and capacitor cannot supply adequate current to follow high frequency load transients in a manner which is compatible with adaptive voltage positioning (AVP) requirements. control of current injection and determination of the insufficiency of current from the switching regulator and capacitors is achieved by impedance matching of the linear regulator to the switching regulator. The linear regulator thus operates at relatively low current and duty cycle to limit power dissipation therein. By matching impedances and increasing the bandwidth of the switching regulator, filter capacitor requirements can be reduced to the point of being met entirely by packaging and/or on-die capacitors which may be placed close to or at the point of load to reduce parasitic inductance, as can the linear regulator.

2. 发明授权

US07560912B2 Hybrid filter for high slew rate output current application 失效
标题翻译：用于高压摆率输出电流应用的混合滤波器
公开(公告)号：US07560912B2
公开(公告)日：2009-07-14
申请号：US11380064
申请日：2006-04-25
申请人： Ming Xu , Yuancheng Ren , Fred C. Lee , Andrew P. Schmit
发明人： Ming Xu , Yuancheng Ren , Fred C. Lee , Andrew P. Schmit
IPC分类号： G05F1/571 , H02H3/22
CPC分类号： H02M3/158 , H02M2001/0045
摘要： An active linear regulator circuit in parallel with a filter capacitor of a switching voltage regulator injects current to a load only when the switching regulator and capacitor cannot supply adequate current to follow high frequency load transients in a manner which is compatible with adaptive voltage positioning (AVP) requirements. control of current injection and determination of the insufficiency of current from the switching regulator and capacitors is achieved by impedance matching of the linear regulator to the switching regulator. The linear regulator thus operates at relatively low current and duty cycle to limit power dissipation therein. By matching impedances and increasing the bandwidth of the switching regulator, filter capacitor requirements can be reduced to the point of being met entirely by packaging and/or on-die capacitors which may be placed close to or at the point of load to reduce parasitic inductance, as can the linear regulator.
摘要翻译：只有当开关稳压器和电容器不能以与自适应电压定位（AVP）兼容的方式提供足够的电流来跟随高频负载瞬变时，与开关电压调节器的滤波电容器并联的有源线性稳压器电路将电流注入到负载）要求。通过线性稳压器与开关调节器的阻抗匹配来实现电流注入的控制和确定开关调节器和电容器的电流不足。因此，线性调节器在相对低的电流和占空比下操作以限制其中的功率耗散。通过匹配阻抗并增加开关稳压器的带宽，可以将滤波电容器的要求降低到完全通过封装和/或片上电容器来满足要求，这些电容器可以放置在接近或负载点以减小寄生电感，线性调节器也可以。

3. 发明申请

US20090174378A1 Hybrid Filter for High Slew Rate Output Current Application 失效
标题翻译：用于高压摆率输出电流应用的混合滤波器
公开(公告)号：US20090174378A1
公开(公告)日：2009-07-09
申请号：US12401815
申请日：2009-03-11
申请人： Ming Xu , Yuancheng Ren , Fred C. Lee , Andrew P. Schmit
发明人： Ming Xu , Yuancheng Ren , Fred C. Lee , Andrew P. Schmit
IPC分类号： G05F1/00
CPC分类号： H02M3/158 , H02M2001/0045
摘要： An active linear regulator circuit in parallel with a filter capacitor of a switching voltage regulator injects current to a load only when the switching regulator and capacitor cannot supply adequate current to follow high frequency load transients in a manner which is compatible with adaptive voltage positioning (AVP) requirements. control of current injection and determination of the insufficiency of current from the switching regulator and capacitors is achieved by impedance matching of the linear regulator to the switching regulator. The linear regulator thus operates at relatively low current and duty cycle to limit power dissipation therein. By matching impedances and increasing the bandwidth of the switching regulator, filter capacitor requirements can be reduced to the point of being met entirely by packaging and/or on-die capacitors which may be placed close to or at the point of load to reduce parasitic inductance, as can the linear regulator.
摘要翻译：只有当开关稳压器和电容器不能以与自适应电压定位（AVP）兼容的方式提供足够的电流来跟随高频负载瞬变时，与开关电压调节器的滤波电容器并联的有源线性稳压器电路将电流注入到负载）要求。通过线性稳压器与开关调节器的阻抗匹配来实现电流注入的控制和确定开关调节器和电容器的电流不足。因此，线性调节器在相对低的电流和占空比下操作以限制其中的功率耗散。通过匹配阻抗并增加开关稳压器的带宽，可以将滤波电容器的要求降低到完全通过封装和/或片上电容器来满足要求，这些电容器可以放置在接近或负载点以减小寄生电感，线性调节器也可以。

4. 发明授权

US07016203B2 Self-driven circuit for synchronous rectifier DC/DC converter 有权
标题翻译：用于同步整流DC / DC转换器的自驱动电路
公开(公告)号：US07016203B2
公开(公告)日：2006-03-21
申请号：US10852683
申请日：2004-05-25
申请人： Ming Xu , Fred C. Lee , Yuancheng Ren
发明人： Ming Xu , Fred C. Lee , Yuancheng Ren
IPC分类号： H02M3/335
CPC分类号： H02M3/33592 , Y02B70/1475
摘要： A power converter having a primary circuit (e.g. full bridge) and a secondary circuit (e.g. current doubler) has switches in the secondary circuit that are controlled by a drive circuit. The drive circuit is connected to a swing node in the primary circuit, and is powered by the primary circuit. The drive circuit has an isolation device such as a transformer to provide electrical isolation between the primary circuit and secondary circuit. The drive circuit provides a current source for driving the secondary switch gates, thereby reducing power consumption. The present drive circuit provides clean gate drive signals without noise and oscillations. The drive circuits of the invention are simple, and require only a few components.
摘要翻译：具有主电路（例如全桥）和次级电路（例如倍频器）的功率转换器具有由驱动电路控制的次级电路中的开关。驱动电路连接到主电路中的摆动节点，并由主电路供电。驱动电路具有诸如变压器的隔离装置，以在主电路和次级电路之间提供电隔离。驱动电路提供用于驱动次级开关门的电流源，从而降低功耗。本驱动电路提供清洁的栅极驱动信号，无噪声和振荡。本发明的驱动电路简单，仅需少量组件。

5. 发明授权

US07254047B2 Power converters having output capacitor resonant with autotransformer leakage inductance 有权
标题翻译：具有输出电容器的功率转换器与自耦变压器漏感谐振
公开(公告)号：US07254047B2
公开(公告)日：2007-08-07
申请号：US11094434
申请日：2005-03-31
申请人： Yuancheng Ren , Julu Sun , Ming Xu , Fred C. Lee
发明人： Yuancheng Ren , Julu Sun , Ming Xu , Fred C. Lee
IPC分类号： H02M3/335
CPC分类号： H02M3/33592 , H02M3/3376 , H02M2001/0058 , Y02B70/1433 , Y02B70/1475 , Y02B70/1491
摘要： Power converters having reduced body diode conduction loss, reduced reverse recovery loss and lower switching noise, among other benefits, have a resonant capacitor Cr connected across an unfiltered output. The resonant capacitor Cr resonates with the leakage inductance Lk of the transformer. The resonant capacitor and leakage inductance are selected such that ½ a LC resonance period is equal to an ON time of each secondary switch S1 S2. The resonance provides zero current switching for secondary switches S1 S2, eliminates zero body diode conduction during dead times, and eliminates reverse recovery losses in the secondary switches. The present invention is applicable to many different circuit topologies such as full bridge, active clamp forward, push-pull forward, and center-tap secondary. The present converters provide high energy conversion efficiency and high frequency operation.
摘要翻译：具有降低的体二极管导通损耗，降低的反向恢复损耗和较低开关噪声以及其他优点的功率转换器具有连接在未滤波输出端的谐振电容器Cr。谐振电容器Cr与变压器的漏电感Lk共振。谐振电容器和漏电感被选择为使得LC共振周期的1/2相当于每个次级开关S 1 S 2的导通时间。谐振为次级开关S 1 S 2提供零电流开关，在死区时间消除零体二极管导通，并消除次级开关中的反向恢复损耗。本发明可应用于许多不同的电路拓扑，例如全桥，有源钳前进，推挽前进和中心抽头次级。本转换器提供高能量转换效率和高频操作。

6. 发明授权

US07196914B2 Power converters having capacitor resonant with transformer leakage inductance 有权
标题翻译：电容转换器具有电容谐振与变压器漏感
公开(公告)号：US07196914B2
公开(公告)日：2007-03-27
申请号：US10992227
申请日：2004-11-19
申请人： Yuancheng Ren , Fred C. Lee , Ming Xu
发明人： Yuancheng Ren , Fred C. Lee , Ming Xu
IPC分类号： H02M3/335
CPC分类号： H02M3/33592 , H02M3/33569 , Y02B70/1433 , Y02B70/1475
摘要： Power converters having reduced body diode conduction loss, reduced reverse recovery loss and lower switching noise, among other benefits, have a resonant capacitor Cr connected across an unfiltered output. The resonant capacitor Cr resonates with the leakage inductance Lk of the transformer. The resonant capacitor and leakage inductance are selected such that ½ a LC resonance period is equal to an ON time of each secondary switch S1 S2. The resonance provides zero current switching for secondary switches S1 S2, eliminates zero body diode conduction during dead times, and eliminates reverse recovery losses in the secondary switches. The present invention is applicable to many different circuit topologies such as full bridge, active clamp forward, push-pull forward, and center-tap secondary. The present converters provide high energy conversion efficiency and high frequency operation.
摘要翻译：具有降低的体二极管导通损耗，降低的反向恢复损耗和较低开关噪声以及其他益处的功率转换器具有连接在未滤波输出端的谐振电容器Cr。谐振电容器Cr与变压器的漏电感Lk共振。谐振电容器和漏电感被选择为使得LC共振周期的1/2相当于每个次级开关S 1 S 2的导通时间。谐振为次级开关S 1 S 2提供零电流开关，在死区时间消除零体二极管导通，并消除次级开关中的反向恢复损耗。本发明可应用于许多不同的电路拓扑，例如全桥，有源钳前进，推挽前进和中心抽头次级。本转换器提供高能量转换效率和高频操作。

7. 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。

8. 发明授权

US06819574B2 Self-driven circuit for synchronous rectifier DC/DC converter 失效
公开(公告)号：US06819574B2
公开(公告)日：2004-11-16
申请号：US10350330
申请日：2003-01-24
申请人： Ming Xu , Fred C. Lee , Yuancheng Ren
发明人： Ming Xu , Fred C. Lee , Yuancheng Ren
IPC分类号： H02M3335
CPC分类号： H02M3/33592 , Y02B70/1475
摘要： A power converter having a primary circuit (e.g. full bridge) and a secondary circuit (e.g. current doubler) has switches in the secondary circuit that are controlled by a drive circuit. The drive circuit is connected to a swing node in the primary circuit, and is powered by the swing node. The drive circuit has an isolation device such as a transformer to provide electrical isolation between the primary circuit and secondary circuit. The drive circuit provides a current source for driving the secondary switch gates, thereby reducing power consumption. The present drive circuit provides clean gate drive signals without noise and oscillations. The drive circuits of the invention are simple, and require only a few components.

9. 发明授权

US07184281B2 Buck converter with high efficiency gate driver providing extremely short dead time 失效
标题翻译：具有高效栅极驱动器的降压转换器提供极短的死区时间
公开(公告)号：US07184281B2
公开(公告)日：2007-02-27
申请号：US10969215
申请日：2004-10-21
申请人： Yuancheng Ren , Fred C. Lee
发明人： Yuancheng Ren , Fred C. Lee
IPC分类号： H02M3/335 , G01F17/00 , G05F1/40
CPC分类号： H02M1/38 , H01F3/14 , H01F30/04 , H02M3/1588 , H03K17/08122 , Y02B70/1466
摘要： A buck converter has a driver circuit with a drive transformer that provides complementary voltages to the buck converter switches. The drive transformer may have two secondary windings, with one winding for each converter switch. As one converter switch experiences a rising gate voltage, the other converter switch experiences a falling gate voltage. Since both converter switches are controlled by the same driver switches, the converter switch dead time is very small. Preferably, at least one converter switch has a voltage shift circuit connected to the gate electrode. Adjustment of the voltage shift magnitude will advance or delay the turn on and turn off times of the switch. Hence, the converter switch dead time can be precisely adjusted by varying the voltage shift magnitude. Preferably, the converter switch dead time is less than 1 or 2 nanoseconds.
摘要翻译：降压转换器具有驱动电路，其中驱动变压器为降压转换器开关提供互补电压。驱动变压器可以具有两个次级绕组，每个转换器开关有一个绕组。当一个转换器开关经历上升栅极电压时，另一个转换器开关经历栅极电压下降。由于两个转换器开关由相同的驱动器开关控制，所以转换器开关死区时间非常小。优选地，至少一个转换器开关具有连接到栅电极的电压移位电路。电压偏移幅度的调整将推进或延迟开关的导通和关闭时间。因此，可以通过改变电压偏移量来精确地调整转换器开关死区时间。优选地，转换器开关死区时间小于1或2纳秒。

10. 发明申请

US20060109696A1 Power converters having output capacitor resonant with autotransformer leakage inductance 有权
标题翻译：具有输出电容器的功率转换器与自耦变压器漏感谐振
公开(公告)号：US20060109696A1
公开(公告)日：2006-05-25
申请号：US11094434
申请日：2005-03-31
申请人： Yuancheng Ren , Julu Sun , Ming Xu , Fred Lee
发明人： Yuancheng Ren , Julu Sun , Ming Xu , Fred Lee
IPC分类号： H02M7/757
CPC分类号： H02M3/33592 , H02M3/3376 , H02M2001/0058 , Y02B70/1433 , Y02B70/1475 , Y02B70/1491
摘要： Power converters having reduced body diode conduction loss, reduced reverse recovery loss and lower switching noise, among other benefits, have a resonant capacitor Cr connected across an unfiltered output. The resonant capacitor Cr resonates with the leakage inductance Lk of the transformer. The resonant capacitor and leakage inductance are selected such that ½ a LC resonance period is equal to an ON time of each secondary switch S1 S2. The resonance provides zero current switching for secondary switches S1 S2, eliminates zero body diode conduction during dead times, and eliminates reverse recovery losses in the secondary switches. The present invention is applicable to many different circuit topologies such as full bridge, active clamp forward, push-pull forward, and center-tap secondary. The present converters provide high energy conversion efficiency and high frequency operation.
摘要翻译：具有降低的体二极管导通损耗，降低的反向恢复损耗和较低开关噪声以及其他优点的功率转换器具有连接在未滤波输出端的谐振电容器Cr。谐振电容器Cr与变压器的漏电感Lk共振。选择谐振电容器和漏电感，使得LC谐振周期的1/2相当于每个次级开关S 1 S 2的导通时间。谐振为次级开关S 1 S 2提供零电流开关，消除零体二极管导通并且消除了次级开关中的反向恢复损耗。本发明可应用于许多不同的电路拓扑，例如全桥，有源钳前进，推挽前进和中心抽头次级。本转换器提供高能量转换效率和高频操作。

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