公开(公告)号：US10110122B2

公开(公告)日：2018-10-23

申请号：US14674704

申请日：2015-03-31

申请人： Virginia Tech Intellectual Properties, Inc.

发明人： Syed Bari ,  Fred C. Lee ,  Qiang Li ,  Pei-Hsin Liu

IPC分类号： H02M3/156 ,  H02M1/14 ,  H02M3/157

摘要： Response of a variable frequency switching constant on-time or adaptive on-time controlled power converter to a large step-up or step-down change in load is improved with a simple circuit that detects magnitude and polarity of a change in output voltage and initiates, extends or terminates conduction of power pulses from an input source through said power converter. Both the amplitude and duration of undershoot or overshoot of the transient response are reduced or, alternatively, the capacitance of an output filter may be significantly reduced and still provide comparable transient performance. The fast adaptive on-time control is applicable to multi-phase power converters using phase managers or one or more phase-locked loops for interleaving of power pulses.

公开(公告)号：US10013007B2

公开(公告)日：2018-07-03

申请号：US14674680

申请日：2015-03-31

申请人： Virginia Tech Intellectual Properties, Inc.

发明人： Pei-Hsin Liu ,  Qiang Li ,  Fred C. Lee

IPC分类号： H02M3/158 ,  G05F1/56 ,  H03L7/06

CPC分类号： G05F1/56 ,  H02M3/1584 ,  H02M2003/1586 ,  H03L7/06

摘要： In a multi-phase power converter using a phase-locked loop (PLL) arrangement for interleaving of pulse frequency modulated (PFM) pulses of the respective phases, improved transient response, improved stability of high bandwidth output voltage feedback loop, guaranteed stability of the PLL loop and avoidance of jittering and phase cancellation issues are achieved by anchoring the bandwidth at the frequency of peak phase margin. This methodology is applicable to multi-phase power conveners of any number of phases and any known or foreseeable topology for individual phases and is not only applicable to power converters operating under constant on-time control, but is extendable to ramp pulse modulation (RPM) control and hysteresis control. Interleaving of pulses from all phases is simplified through use of phase managers with a reduced number of PLLS using hybrid interleaving arrangements that do not exhibit jittering even when ripple is completely canceled.

公开(公告)号：US20150280556A1

公开(公告)日：2015-10-01

申请号：US14674704

申请日：2015-03-31

申请人： Virginia Tech Intellectual Properties, Inc.

发明人： Syed Bari ,  Fred C. Lee ,  Qiang Li ,  Pei-Hsin Liu

IPC分类号： H02M3/156 ,  H02M1/14

CPC分类号： H02M3/156 ,  H02M1/14 ,  H02M2003/1566

摘要： Response of a variable frequency switching constant on-time or adaptive on-time controlled power converter to a large step-up or step-down change in load is improved with a simple circuit that detects magnitude and polarity of a change in output voltage and initiates, extends or terminates conduction of power pulses from an input source through said power converter. Both the amplitude and duration of undershoot or overshoot of the transient response are reduced or, alternatively, the capacitance of an output filter may be significantly reduced and still provide comparable transient performance. The fast adaptive on-time control is applicable to multi-phase power converters using phase managers or one or more phase-locked loops for interleaving of power pulses.

摘要翻译： 可变频率开关常数导通时间或自适应导通时间控制功率转换器对负载的大的升压或降压变化的响应通过检测输出电压变化的大小和极性的简单电路被提高，并且启动 延长或终止来自输入源的功率脉冲的传导通过所述功率转换器。 瞬态响应的下冲或过冲的幅度和持续时间都会降低，或者输出滤波器的电容可以显着降低，并且仍然提供可比较的瞬态性能。 快速自适应导通时间控制适用于使用相位管理器或一个或多个锁相环来交换功率脉冲的多相功率转换器。

公开(公告)号：US10312805B2

公开(公告)日：2019-06-04

申请号：US15075553

申请日：2016-03-21

申请人： Virginia Tech Intellectual Properties, Inc.

发明人： Virginia Li ,  Pei-Hsin Liu ,  Qiang Li ,  Fred C. Lee

IPC分类号： H02M3/156

摘要： A power converter using constant on-time (COT) or ramp pulse modulation (RPM) control achieves more rapid resumption of steady-state operation after a step-up load transient by extending an on-time of a switching pulse by interrupting a ramp voltage waveform that is compared with a threshold that equals a threshold voltage at the termination of a switching pulse or increasing a voltage with which the ramp voltage is compared. These techniques are applied to both single-phase and multi-phase power converters.

公开(公告)号：US09601997B2

公开(公告)日：2017-03-21

申请号：US14183841

申请日：2014-02-19

申请人： Virginia Tech Intellectual Properties, Inc.

发明人： Yingyi Yan ,  Pei-Hsin Liu ,  Fred C. Lee

IPC分类号： H02M3/157 ,  H02M3/156

CPC分类号： H02M3/156 ,  H02M3/157 ,  H02M2003/1566

摘要： Operation of a switching power converter having an output capacitor having a small equivalent series resistance (ESR) is stabilized and jitter reduced by sensing capacitor current with gain and combining the resulting signal with the output voltage signal to provide a feedback signal to control switching of the power converter. capacitor current can be sensed without interfering with operation of the filter capacitor by providing a branch circuit having a time constant matched to the output or filter capacitor but an arbitrarily high impedance so as to be effectively lossless. The gain provided in the capacitor current signal can be tuned to provide optimally short settling time after load transients; generally within one switching cycle. Matching of time constants and/or tuning of gain can be performed automatically.

公开(公告)号：US20140306680A1

公开(公告)日：2014-10-16

申请号：US14050435

申请日：2013-10-10

申请人： Virginia Tech Intellectual Properties, Inc.

发明人： Pei-Hsin Liu ,  Fred C. Lee ,  Yingyi Yan ,  Paolo Mattavelli

IPC分类号： G05F1/46

CPC分类号： G05F1/468 ,  H02M3/156 ,  H02M3/157 ,  H02M2001/0012 ,  H02M2001/0025

摘要： Peak current, valley current or average current mode controlled power converters in either digital or analog implementations obtain a stabilized feedback loop and allow high system bandwidth design by use of an external ramp generator using a slope computation equation or design parameters based on fixing the quality factor of a double pole at one-half of the switching frequency at a desired value The slope of the external ramp waveform is tuned automatically with knowledge of the slope change in the waveform of inductor current of a power converter derived by differentiating a waveform in the current feedback loop. This autotuning of the external ramp generator provides immunity of quality factor change under variations of duty cycle, component values of topological change of the power converter.

摘要翻译： 数字或模拟实现中的峰值电流，谷值电流或平均电流模式控制功率转换器可获得稳定的反馈回路，并通过使用斜坡计算公式的外部斜坡发生器或基于固定品质因数的设计参数来实现高系统带宽设计 在开关频率的一半的一个双极在期望值外部斜坡波形的斜率被自动调整，知道通过区分电流中的波形导致的功率转换器的电感器电流的波形的斜率变化 反馈回路。 外部斜坡发生器的这种自动调谐在功率变换器的拓扑变化的占空比变化的变化下提供品质因数变化的抗扰度。

公开(公告)号：US09678521B2

公开(公告)日：2017-06-13

申请号：US14050435

申请日：2013-10-10

申请人： Virginia Tech Intellectual Properties, Inc

发明人： Pei-Hsin Liu ,  Fred C. Lee ,  Yingyi Yan ,  Paolo Mattavelli

IPC分类号： H02M3/157 ,  G05F1/46 ,  H02M3/156 ,  H02M1/00

CPC分类号： G05F1/468 ,  H02M3/156 ,  H02M3/157 ,  H02M2001/0012 ,  H02M2001/0025

摘要： Peak current, valley current or average current mode controlled power converters in either digital or analog implementations obtain a stabilized feedback loop and allow high system bandwidth design by use of an external ramp generator using a slope computation equation or design parameters based on fixing the quality factor of a double pole at one-half of the switching frequency at a desired value The slope of the external ramp waveform is tuned automatically with knowledge of the slope change in the waveform of inductor current of a power converter derived by differentiating a waveform in the current feedback loop. This autotuning of the external ramp generator provides immunity of quality factor change under variations of duty cycle, component values of topological change of the power converter.

公开(公告)号：US20160294278A1

公开(公告)日：2016-10-06

申请号：US15075553

申请日：2016-03-21

申请人： Virginia Tech Intellectual Properties, Inc.

发明人： Virginia Li ,  Pei-Hsin Liu ,  Qiang Li ,  Fred C. Lee

IPC分类号： H02M3/04

CPC分类号： H02M3/156 ,  H02M2003/1566

摘要： A power converter using constant on-time (COT) or ramp pulse modulation (RPM) control achieves more rapid resumption of steady-state operation after a step-up load transient by extending an on-time of a switching pulse by interrupting a ramp voltage waveform that is compared with a threshold that equals a threshold voltage at the termination of a switching pulse or increasing a voltage with which the ramp voltage is compared. These techniques are applied to both single-phase and multi-phase power converters.

摘要翻译： 使用恒定导通时间（COT）或斜坡脉冲调制（RPM）控制的功率转换器通过通过中断斜坡电压来延长开关脉冲的导通时间来实现升压负载瞬变之后的更快恢复稳态操作 该波形与等于开关脉冲终止时的阈值电压的阈值进行比较，或增加与斜坡电压进行比较的电压。 这些技术适用于单相和多相功率转换器。

公开(公告)号：US20150277460A1

公开(公告)日：2015-10-01

申请号：US14674680

申请日：2015-03-31

申请人： Virginia Tech Intellectual Properties, Inc.

发明人： Pei-Hsin Liu ,  Qiang Li ,  Fred C. Lee

IPC分类号： G05F1/56

CPC分类号： G05F1/56 ,  H02M3/1584 ,  H02M2003/1586 ,  H03L7/06

摘要： In a multi-phase power converter using a phase-locked loop (PLL) arrangement for interleaving of pulse frequency modulated (PFM) pulses of the respective phases, improved transient response, improved stability of high bandwidth output voltage feedback loop, guaranteed stability of the PLL loop and avoidance of jittering and phase cancellation issues are achieved by anchoring the bandwidth at the frequency of peak phase margin. This methodology is applicable to multi-phase power conveners of any number of phases and any known or foreseeable topology for individual phases and is not only applicable to power converters operating under constant on-time control, but is extendable to ramp pulse modulation (RPM) control and hysteresis control. Interleaving of pulses from all phases is simplified through use of phase managers with a reduced number of PLLS using hybrid interleaving arrangements that do not exhibit jittering even when ripple is completely canceled.

摘要翻译： 在使用锁相环（PLL）布置用于交错各相的脉冲频率调制（PFM）脉冲的多相功率转换器中，改进的瞬态响应，改进的高带宽输出电压反馈回路的稳定性，保证了 通过将带宽锚定在峰值相位裕度的频率来实现PLL环路和避免抖动和相位消除问题。 该方法适用于任何阶段的任何阶段的多相功率调节器以及用于各个相的任何已知或可预见的拓扑，并且不仅适用于在恒定导通时间控制下工作的功率转换器，而且可扩展到斜坡脉冲调制（RPM） 控制和滞后控制。 通过使用具有减少数量的PLLS的相位管理器来简化来自所有相的脉冲的交错，即使在纹波被完全取消时也不会出现抖动的混合交错布置。

公开(公告)号：US20140292300A1

公开(公告)日：2014-10-02

申请号：US14183841

申请日：2014-02-19

申请人： Virginia Tech Intellectual Properties, Inc.

发明人： Yingyi Yan ,  Pei-Hsin Liu ,  Fred C. Lee

IPC分类号： H02M3/158

CPC分类号： H02M3/156 ,  H02M3/157 ,  H02M2003/1566

摘要： Operation of a switching power converter having an output capacitor having a small equivalent series resistance (ESR) is stabilized and jitter reduced by sensing capacitor current with gain and combining the resulting signal with the output voltage signal to provide a feedback signal to control switching of the power converter. capacitor current can be sensed without interfering with operation of the filter capacitor by providing a branch circuit having a time constant matched to the output or filter capacitor but an arbitrarily high impedance so as to be effectively lossless. The gain provided in the capacitor current signal can be tuned to provide optimally short settling time after load transients; generally within one switching cycle. Matching of time constants and/or tuning of gain can be performed automatically.

摘要翻译： 具有小等效串联电阻（ESR）的输出电容器的开关电源转换器的操作通过用增益感测电容器电流而稳定并且抖动降低，并且将所得到的信号与输出电压信号组合以提供反馈信号以控制 电源转换器 可以通过提供具有与输出或滤波电容器匹配的时间常数但是具有任意高阻抗的分支电路来检测电容器电流而不干扰滤波电容器的操作，以便有效地无损。 可以调整电容电流信号中提供的增益，以便在负载瞬变之后提供最佳的稳定时间; 一般在一个开关周期内。 可以自动执行时间常数和/或增益调谐的匹配。