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1. 发明授权

US08049481B2 Adaptive multi-mode digital control improving light-load efficiency in switching power converters 有权
标题翻译：自适应多模数字控制提高了开关电源转换器的轻载效率
公开(公告)号：US08049481B2
公开(公告)日：2011-11-01
申请号：US12608854
申请日：2009-10-29
申请人： Yong Li , Carrie Seim , Junjie Zheng , John W. Kesterson , Liang Yan , Clarita Poon , Fuqiang Shi
发明人： Yong Li , Carrie Seim , Junjie Zheng , John W. Kesterson , Liang Yan , Clarita Poon , Fuqiang Shi
IPC分类号： G05F1/575 , H02M3/335
CPC分类号： H02M3/157 , H02M2001/0032 , Y02B70/16
摘要： Adaptive multi-mode digital control schemes that improve the light-load efficiency (and thus the overall average efficiency) in switch-mode power converters without causing performance issues such as audible noises or excessive voltage ripples. Embodiments include a switch-mode power converter that reduces current in the power converter using a second pulse-width-modulation (PWM) mode before reaching switching frequencies that generate audible noises. As the load across the output of the power converter is reduced, the power converter transitions from a first PWM mode in high load conditions to a first pulse-frequency-modulation (PFM) mode, then to a second PWM mode, and finally to a second PFM mode. During the second PFM mode, the switching frequency is dropped to audible frequency levels. Current in the power converter, however, is reduced in the second PWM mode before transitioning to the second PFM mode. Therefore, the power converter produces less or no audible noise in light load conditions where the switching frequency drops to audible frequency levels, while achieving high efficiency across varying load conditions.
摘要翻译：自适应多模数字控制方案，可以提高开关模式电源转换器的轻负载效率（从而提高整体平均效率），而不会引起诸如声音噪声或电压波动过大等性能问题。实施例包括开关模式功率转换器，其在达到产生可听见噪声的开关频率之前，使用第二脉冲宽度调制（PWM）模式减小功率转换器中的电流。随着功率转换器输出端的负载减小，功率转换器从高负载条件下的第一个PWM模式转换到第一个脉冲频率调制（PFM）模式，然后转换到第二个PWM模式，最后到第二PFM模式。在第二个PFM模式下，开关频率下降到可听频率水平。然而，在转换到第二PFM模式之前，功率转换器中的电流在第二PWM模式中减小。因此，功率转换器在轻负载条件下产生较少或没有可听见的噪声，其中开关频率下降到可听频率水平，同时在不同的负载条件下实现高效率。

2. 发明申请

US20100164455A1 ADAPTIVE MULTI-MODE DIGITAL CONTROL IMPROVING LIGHT-LOAD EFFICIENCY IN SWITCHING POWER CONVERTERS 有权
标题翻译：自适应多模数字控制提高开关电源转换器的光负载效率
公开(公告)号：US20100164455A1
公开(公告)日：2010-07-01
申请号：US12608854
申请日：2009-10-29
申请人： Yong Li , Carrie Seim , Junjie Zheng , John W. Kesterson , Liang Yan , Clarita Poon , Fuqiang Shi
发明人： Yong Li , Carrie Seim , Junjie Zheng , John W. Kesterson , Liang Yan , Clarita Poon , Fuqiang Shi
IPC分类号： G05F1/10
CPC分类号： H02M3/157 , H02M2001/0032 , Y02B70/16
摘要： Adaptive multi-mode digital control schemes that improve the light-load efficiency (and thus the overall average efficiency) in switch-mode power converters without causing performance issues such as audible noises or excessive voltage ripples. Embodiments include a switch-mode power converter that reduces current in the power converter using a second pulse-width-modulation (PWM) mode before reaching switching frequencies that generate audible noises. As the load across the output of the power converter is reduced, the power converter transitions from a first PWM mode in high load conditions to a first pulse-frequency-modulation (PFM) mode, then to a second PWM mode, and finally to a second PFM mode. During the second PFM mode, the switching frequency is dropped to audible frequency levels. Current in the power converter, however, is reduced in the second PWM mode before transitioning to the second PFM mode. Therefore, the power converter produces less or no audible noise in light load conditions where the switching frequency drops to audible frequency levels, while achieving high efficiency across varying load conditions.
摘要翻译：自适应多模数字控制方案，可以提高开关模式电源转换器的轻负载效率（从而提高整体平均效率），而不会引起诸如声音噪声或电压波动过大等性能问题。实施例包括开关模式功率转换器，其在达到产生可听见噪声的开关频率之前，使用第二脉冲宽度调制（PWM）模式减小功率转换器中的电流。随着功率转换器输出端的负载减小，功率转换器从高负载条件下的第一个PWM模式转换到第一个脉冲频率调制（PFM）模式，然后转换到第二个PWM模式，最后到第二PFM模式。在第二个PFM模式下，开关频率下降到可听频率水平。然而，在转换到第二PFM模式之前，功率转换器中的电流在第二PWM模式中减小。因此，功率转换器在轻负载条件下产生较少或没有可听见的噪声，其中开关频率下降到可听频率水平，同时在不同的负载条件下实现高效率。

3. 发明申请

US20100202165A1 Dynamic Drive of Switching Transistor of Switching Power Converter 有权
标题翻译：开关电源转换器开关晶体管的动态驱动
公开(公告)号：US20100202165A1
公开(公告)日：2010-08-12
申请号：US12678690
申请日：2007-09-28
申请人： Junjie Zheng , Jun Zheng , Andrew Kwok-Cheung Lee , John William Kesterson , Allan Ming-Lun Lin , Hien Huu Bui , Carrie Seim , Yong Li
发明人： Junjie Zheng , Jun Zheng , Andrew Kwok-Cheung Lee , John William Kesterson , Allan Ming-Lun Lin , Hien Huu Bui , Carrie Seim , Yong Li
IPC分类号： H02M3/335
CPC分类号： H02M3/33507 , H02M2001/0032 , H03K17/163 , H03K17/166 , Y02B70/16
摘要： A switching power converter comprises a transformer (110), a switch (108) coupled to the transformer (110), and a switch controller (200) coupled to the switch (108) for generating a switch drive signal (207) to turn on or off the switch (108). The drive current of the switch drive signal (207) is adjusted dynamically according to line or load conditions within a switching cycle and/or over a plurality of switching cycles. The magnitude of the drive current can be dynamically adjusted within a switching cycle and/or over a plurality of switching cycles, in addition to the pulse widths or pulse frequencies of the drive current.
摘要翻译：开关电源转换器包括变压器（110），耦合到变压器（110）的开关（108）和耦合到开关（108）的开关控制器（200），用于产生开关驱动信号（207）以导通或关闭开关（108）。开关驱动信号（207）的驱动电流根据开关周期内和/或多个开关周期中的线路或负载条件动态地调整。除了驱动电流的脉冲宽度或脉冲频率之外，驱动电流的大小可以在开关周期内和/或多个开关周期内动态地调节。

4. 发明授权

US08576586B2 Dynamic drive of switching transistor of switching power converter 有权
标题翻译：开关电源转换器开关晶体管的动态驱动
公开(公告)号：US08576586B2
公开(公告)日：2013-11-05
申请号：US12678690
申请日：2007-09-28
申请人： Junjie Zheng , Jun Zheng , Andrew Kwok-Cheung Lee , John William Kesterson , Allan Ming-Lun Lin , Hien Huu Bui , Carrie Seim , Yong Li
发明人： Junjie Zheng , Jun Zheng , Andrew Kwok-Cheung Lee , John William Kesterson , Allan Ming-Lun Lin , Hien Huu Bui , Carrie Seim , Yong Li
IPC分类号： H02M3/335 , H02M3/337 , H02M3/338
CPC分类号： H02M3/33507 , H02M2001/0032 , H03K17/163 , H03K17/166 , Y02B70/16
摘要： A switching power converter comprises a transformer (110), a switch (108) coupled to the transformer (110), and a switch controller (200) coupled to the switch (108) for generating a switch drive signal (207) to turn on or off the switch (108). The drive current of the switch drive signal (207) is adjusted dynamically according to line or load conditions within a switching cycle and/or over a plurality of switching cycles. The magnitude of the drive current can be dynamically adjusted within a switching cycle and/or over a plurality of switching cycles, in addition to the pulse widths or pulse frequencies of the drive current.
摘要翻译：开关电源转换器包括变压器（110），耦合到变压器（110）的开关（108）和耦合到开关（108）的开关控制器（200），用于产生开关驱动信号（207）以导通或关闭开关（108）。开关驱动信号（207）的驱动电流根据开关周期内和/或多个开关周期中的线路或负载条件动态地调整。除了驱动电流的脉冲宽度或脉冲频率之外，驱动电流的大小可以在开关周期内和/或多个开关周期内动态地调节。

5. 发明授权

US07974107B2 System and method for controlling a current limit with primary side sensing using a hybrid PWM and PFM control 有权
标题翻译：使用混合PWM和PFM控制来控制初级侧感测的电流限制的系统和方法
公开(公告)号：US07974107B2
公开(公告)日：2011-07-05
申请号：US12199471
申请日：2008-08-27
申请人： Yong Li , Junjie Zheng , Liang Yan , John Kesterson , Xiao Yan Wang
发明人： Yong Li , Junjie Zheng , Liang Yan , John Kesterson , Xiao Yan Wang
IPC分类号： H02M3/335
CPC分类号： H02M3/33523
摘要： A hybrid constant current control system that uses both pulse width modulation (PWM) and pulse frequency modulation (PFM) control. When transitioning from constant voltage mode to constant current mode the present invention can continue to control using PWM. Thereafter, when the voltage has dropped, the present invention smoothly transitions to PFM mode. The point of transition is based upon the switching frequency and the lowest rated voltage of operation. The system and method avoids very short (narrow) Ton times which ensures accurate constant current (CC) control with bipolar junction transistor (BJT) devices. The present invention also avoids acoustic noise because the switching frequency is maintained at a high enough level to avoid such acoustic noise even when the energy transferred through the transformer is still substantial and the output voltage is not too low. In addition the output current limit is insensitive to variation in the inductance-input voltage ratio, and is minimized against leakage inductance.
摘要翻译：一种采用脉宽调制（PWM）和脉冲频率调制（PFM）控制的混合恒流控制系统。当从恒定电压模式转换到恒定电流模式时，本发明可以使用PWM继续控制。此后，当电压下降时，本发明平滑地转变为PFM模式。转换点基于开关频率和最低额定工作电压。该系统和方法避免了非常短（窄）的Ton次，从而确保使用双极结型晶体管（BJT）器件进行精确的恒定电流（CC）控制。本发明还避免了声学噪声，因为即使当通过变压器传送的能量仍然很大并且输出电压不是太低时，开关频率被保持在足够高的水平以避免这种声学噪声。此外，输出电流限制对电感 - 输入电压比的变化不敏感，并且对漏电感最小化。

6. 发明申请

US20090059632A1 System And Method For Controlling A Current Limit With Primary Side Sensing Using A Hybrid PWM and PFM Control 有权
标题翻译：使用混合PWM和PFM控制的初级侧检测来控制电流限制的系统和方法
公开(公告)号：US20090059632A1
公开(公告)日：2009-03-05
申请号：US12199471
申请日：2008-08-27
申请人： Yong Li , Junjie Zheng , Liang Yan , John Kesterson , Xiao Yan Wang
发明人： Yong Li , Junjie Zheng , Liang Yan , John Kesterson , Xiao Yan Wang
IPC分类号： H02M7/155
CPC分类号： H02M3/33523
摘要： A hybrid constant current control system that uses both pulse width modulation (PWM) and pulse frequency modulation (PFM) control. When transitioning from constant voltage mode to constant current mode the present invention can continue to control using PWM. Thereafter, when the voltage has dropped, the present invention smoothly transitions to PFM mode. The point of transition is based upon the switching frequency and the lowest rated voltage of operation. The system and method avoids very short (narrow) Ton times which ensures accurate constant current (CC) control with bipolar junction transistor (BJT) devices. The present invention also avoids acoustic noise because the switching frequency is maintained at a high enough level to avoid such acoustic noise even when the energy transferred through the transformer is still substantial and the output voltage is not too low. In addition the output current limit is insensitive to variation in the inductance-input voltage ratio, and is minimized against leakage inductance.
摘要翻译：一种采用脉宽调制（PWM）和脉冲频率调制（PFM）控制的混合恒流控制系统。当从恒定电压模式转换到恒定电流模式时，本发明可以使用PWM继续控制。此后，当电压下降时，本发明平滑地转变为PFM模式。转换点基于开关频率和最低额定工作电压。该系统和方法避免了非常短（窄）的Ton次，从而确保使用双极结型晶体管（BJT）器件进行精确的恒定电流（CC）控制。本发明还避免了声学噪声，因为即使当通过变压器传送的能量仍然很大并且输出电压不是太低时，开关频率被保持在足够高的水平以避免这种声学噪声。此外，输出电流限制对电感 - 输入电压比的变化不敏感，并且对漏电感最小化。

7. 发明授权

US08787039B2 Hybrid adaptive power factor correction schemes for switching power converters 有权
标题翻译：用于开关电源转换器的混合自适应功率因数校正方案
公开(公告)号：US08787039B2
公开(公告)日：2014-07-22
申请号：US13552567
申请日：2012-07-18
申请人： Fuqiang Shi , Xiaolin Gao , Hien Huu Bui , Yong Li , John William Kesterson
发明人： Fuqiang Shi , Xiaolin Gao , Hien Huu Bui , Yong Li , John William Kesterson
IPC分类号： H02M3/335
CPC分类号： H02M1/4258 , H02M2001/0003 , Y02B70/126
摘要： A method of a controller of a switching power converter that provides a configurable power factor control method for the switching power converter. The controller combines power regulation control methods of constant on-time control and constant power control to adjust the power factor of the switching power converter. The controller switches between constant on-time control and constant power control based on an input voltage of the power converter.
摘要翻译：一种提供用于开关功率转换器的可配置功率因数控制方法的开关电源转换器的控制器的方法。该控制器结合了恒定导通时间控制和恒功率控制的功率调节控制方式，以调整开关电源转换器的功率因数。控制器根据功率转换器的输入电压在恒定导通时间控制和恒定功率控制之间切换。

8. 发明申请

US20130121044A1 Power Converter Controller IC Having Pins with Multiple Functions 有权
标题翻译：具有多功能引脚的电源转换器控制器IC
公开(公告)号：US20130121044A1
公开(公告)日：2013-05-16
申请号：US13612607
申请日：2012-09-12
申请人： Xiaolin Gao , Yong Li , Qiu Sha , Fuqiang Shi , John William Kesterson , Jiang Chen
发明人： Xiaolin Gao , Yong Li , Qiu Sha , Fuqiang Shi , John William Kesterson , Jiang Chen
IPC分类号： H02H7/12
CPC分类号： H02M1/32 , H02M3/33523
摘要： A controller integrated circuit (IC) for controlling a power converter uses one or more IC pins having plurality of functions such as configuration of a parameter supported by the controller IC and shutdown protection. Several different functions may be supported by a single IC pin, thereby reducing the number of pins required in the controller IC and also reducing the cost of manufacturing the controller IC. The controller IC may also share a comparison circuit among different pins and the different functions provided by those pins. Use of a shared comparison circuit further reduces the cost of manufacturing the controller IC without sacrificing the performance of the IC.
摘要翻译：用于控制功率转换器的控制器集成电路（IC）使用具有多个功能的一个或多个IC引脚，诸如由控制器IC支持的参数的配置和关断保护。单个IC引脚可以支持几个不同的功能，从而减少了控制器IC中所需的引脚数量，并且还降低了制造控制器IC的成本。控制器IC还可以在不同引脚之间共享比较电路以及由这些引脚提供的不同功能。使用共享比较电路进一步降低了制造控制器IC的成本，而不牺牲IC的性能。

9. 发明授权

US09112498B2 Dynamic MOSFET gate drivers 有权
标题翻译：动态MOSFET栅极驱动器
公开(公告)号：US09112498B2
公开(公告)日：2015-08-18
申请号：US13568976
申请日：2012-08-07
申请人： Yong Li , Fuqiang Shi , Andrew Kwok-Cheung Lee , David Nguyen , Jiang Chen
发明人： Yong Li , Fuqiang Shi , Andrew Kwok-Cheung Lee , David Nguyen , Jiang Chen
IPC分类号： H02M3/335 , H02M1/08 , H03K17/16
CPC分类号： H03K17/166 , H02M1/08 , H02M3/335 , H02M3/33523 , H03K17/163
摘要： The embodiments herein describe a dynamic metal-oxide-semiconductor field-effect transistor (MOSFET) gate driver system architecture and control scheme. The MOSFET gate driver system dynamically adjusts both the gate driver turn-on-resistance and the gate driver turn-off resistance within a single (i.e., one) switching cycle to reduce electromagnetic interference (EMI) in the system and to minimize the conduction loss of a power MOSFET during operation.
摘要翻译：本文的实施例描述了动态金属氧化物半导体场效应晶体管（MOSFET）栅极驱动器系统架构和控制方案。 MOSFET栅极驱动器系统在单个（即一个）开关周期内动态地调节栅极驱动器导通电阻和栅极驱动器关断电阻，以减少系统中的电磁干扰（EMI）并使传导损耗最小化的功率MOSFET。

10. 发明申请

US20140022829A1 Hybrid Adaptive Power Factor Correction Schemes For Switching Power Converters 有权
标题翻译：用于开关电源转换器的混合自适应功率因数校正方案
公开(公告)号：US20140022829A1
公开(公告)日：2014-01-23
申请号：US13552567
申请日：2012-07-18
申请人： Fuqiang Shi , Xiaolin Gao , Hien Huu Bui , Yong Li , John William Kesterson
发明人： Fuqiang Shi , Xiaolin Gao , Hien Huu Bui , Yong Li , John William Kesterson
IPC分类号： H02M7/04
CPC分类号： H02M1/4258 , H02M2001/0003 , Y02B70/126
摘要： The embodiments disclosed herein describe a method of a controller of a switching power converter that provides a configurable power factor control method for the switching power converter. In one embodiment, the controller combines power regulation control methods of constant on-time control and constant power control to adjust the power factor of the switching power converter.
摘要翻译：本文公开的实施例描述了提供用于开关功率转换器的可配置功率因数控制方法的开关功率转换器的控制器的方法。在一个实施例中，控制器组合了恒定导通时间控制和恒定功率控制的功率调节控制方法，以调节开关功率转换器的功率因数。

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