公开(公告)号：US08497729B2

公开(公告)日：2013-07-30

申请号：US13664213

申请日：2012-10-30

申请人： William M. Polivka

发明人： William M. Polivka

IPC分类号： H03D3/00

CPC分类号： H03K5/24 ,  G01R19/12 ,  H03M1/60

摘要： A time-differential analog comparator includes a variable frequency signal source, a timing circuit, a counting circuit, and an evaluation circuit. The variable frequency signal source provides a repeating signal having a frequency corresponding to a value of an analog input. The timing circuit defines a timing sequence including a first time interval and a second time interval and generates a mode select signal at a time between the first time interval and the second time interval to stimulate a change in the analog input. The counting circuit is coupled to the timing circuit to count the periods of the repeating signal. The evaluation circuit coupled generates a decision signal in response to a count of the periods of the repeating signal indicated by the counting circuit. The first time interval is not equal to the second time interval to generate an offset in the decision signal.

摘要翻译： 时差微分模拟比较器包括可变频率信号源，定时电路，计数电路和评估电路。 可变频率信号源提供具有对应于模拟输入的值的频率的重复信号。 定时电路定义包括第一时间间隔和第二时间间隔的定时序列，并且在第一时间间隔和第二时间间隔之间的时间产生模式选择信号，以刺激模拟输入的变化。 计数电路耦合到定时电路以对重复信号的周期进行计数。 所耦合的评估电路响应于由计数电路指示的重复信号的周期的计数而产生判定信号。 第一时间间隔不等于在判定信号中产生偏移的第二时间间隔。

公开(公告)号：US20120281439A1

公开(公告)日：2012-11-08

申请号：US13552468

申请日：2012-07-18

申请人： William M. Polivka ,  Raymond Kenneth Orr

发明人： William M. Polivka ,  Raymond Kenneth Orr

IPC分类号： H02M3/335

CPC分类号： H02M3/33523 ,  H02M3/33592 ,  Y02B70/1475

摘要： A power supply includes an energy transfer element having first, second and third windings. An input of the first winding is coupled to an input of the power supply and an output of the second winding is coupled to an output of the power supply. A secondary control circuit is coupled across the second winding to switch a switched element coupled to the second winding in response to a difference between an actual output value and a desired output value to force a current in the third winding that is representative of the difference between the actual output value and the desired output value. A primary control circuit is coupled to a primary switch and to the third winding. The primary control circuit is coupled to switch the primary switch in response to the current forced in the third winding by the secondary control circuit.

摘要翻译： 电源包括具有第一，第二和第三绕组的能量传递元件。 第一绕组的输入耦合到电源的输入，并且第二绕组的输出耦合到电源的输出。 二次控制电路跨越第二绕组耦合，以响应于实际输出值和期望输出值之间的差来切换耦合到第二绕组的开关元件，以迫使第三绕组中的电流代表第二绕组之间的差 实际输出值和所需输出值。 主控制电路耦合到初级开关和第三绕组。 主控制电路被耦合以响应于由次级控制电路在第三绕组中强制的电流来切换初级开关。

公开(公告)号：US20120146607A1

公开(公告)日：2012-06-14

申请号：US13401674

申请日：2012-02-21

申请人： David Kung ,  William M. Polivka

发明人： David Kung ,  William M. Polivka

IPC分类号： G05F1/10

CPC分类号： H02M3/33523 ,  H02M2001/0009

摘要： An example power supply includes an energy transfer element, a switch and a controller. The controller includes a logic circuit and a constant current control circuit. The logic circuit generates a drive signal to control the switch in response to a control signal. The constant current control circuit generates the control signal in response to a received input current sense signal, input voltage sense signal, and output voltage sense signal. An integrator included in the constant current control circuit integrates the input current sense signal to generate an integrated signal representative of a charge taken from the input voltage source. The constant current control circuit is adapted to generate the control signal to provide a constant current at the output of the power supply such that the integrated signal is proportional to a ratio of the output voltage sense signal to the input voltage sense signal.

摘要翻译： 示例性电源包括能量传递元件，开关和控制器。 控制器包括逻辑电路和恒流控制电路。 逻辑电路响应于控制信号产生驱动信号以控制开关。 恒流控制电路根据接收的输入电流检测信号，输入电压检测信号和输出电压检测信号产生控制信号。 包括在恒流控制电路中的积分器将输入电流检测信号积分，以产生表示从输入电压源获取的电荷的积分信号。 恒流控制电路适于产生控制信号以在电源的输出处提供恒定电流，使得积分信号与输出电压感测信号与输入电压感测信号的比例成比例。

公开(公告)号：US08000115B2

公开(公告)日：2011-08-16

申请号：US12968100

申请日：2010-12-14

申请人： William M. Polivka ,  Raymond Kenneth Orr

发明人： William M. Polivka ,  Raymond Kenneth Orr

IPC分类号： H02M3/335

CPC分类号： H02M3/33523 ,  H02M3/33592 ,  Y02B70/1475

摘要： A flyback converter controller with forced primary regulation is disclosed. An example flyback converter controller includes a secondary control circuit to be coupled to a switched element coupled to a second winding of a coupled inductor of a flyback converter. The secondary control circuit is to be coupled across an output of the second winding to switch the switched element in response to a difference between an actual output value at the output of the second winding and a desired output value to force a current in a third winding of the coupled inductor that is representative of the difference between the actual output value at the output of the second winding and the desired output value. A primary control circuit is also included and is to be coupled to a primary switch coupled to a first winding of the coupled inductor. The primary control circuit is to be coupled to receive the current forced in the third winding by the secondary control circuit. The primary control circuit is coupled to switch the primary switch to regulate an output of the flyback converter coupled to the output of the second winding in response to the forced current.

摘要翻译： 公开了一种具有强制初级调节功能的反激转换器控制器。 示例性反激转换器控制器包括二次控制电路，其被耦合到耦合到反激转换器的耦合电感器的第二绕组的开关元件。 次级控制电路将被耦合在第二绕组的输出端上，以响应于在第二绕组的输出处的实际输出值与期望的输出值之间的差来切换开关元件，以迫使第三绕组中的电流 耦合电感器表示第二绕组输出端的实际输出值与期望的输出值之差。 还包括主控制电路，并且耦合到耦合到耦合电感器的第一绕组的初级开关。 主控制电路被耦合以接收由次级控制电路在第三绕组中强制的电流。 主控制电路被耦合以响应于强制电流来切换主开关以调节耦合到第二绕组的输出的反激转换器的输出。

公开(公告)号：US20100194367A1

公开(公告)日：2010-08-05

申请号：US12363657

申请日：2009-01-30

申请人： Leif Lund ,  Alex B. Djenguerian ,  William M. Polivka

发明人： Leif Lund ,  Alex B. Djenguerian ,  William M. Polivka

IPC分类号： G05F1/00

CPC分类号： H02M3/33507 ,  H02M3/33523 ,  H02M2001/0025

摘要： An example apparatus to regulate an output voltage of a power converter at light/no load conditions includes a driver circuit, a feedback circuit, and an adjustable voltage reference circuit. The driver circuit is coupled to output a drive signal to switch a power switch between an ON state and an OFF state to regulate an output of the power converter. The feedback circuit is coupled to the driver circuit and is further coupled to output an enable signal to switch the power switch to an ON state in response to an output voltage signal. The adjustable voltage reference circuit is coupled to adjust a voltage reference such that a bias winding voltage of the power converter is adjusted nonlinearly in response to a load that is to be coupled to the output of the power converter.

摘要翻译： 在轻/无负载条件下调节功率转换器的输出电压的示例性装置包括驱动电路，反馈电路和可调电压参考电路。 驱动电路被耦合以输出驱动信号，以在ON状态和OFF状态之间切换电力开关，以调节功率转换器的输出。 反馈电路耦合到驱动器电路，并且还被耦合以输出使能信号，以响应于输出电压信号将功率开关切换到ON状态。 耦合可调电压参考电路以调整电压参考，使得响应于要耦合到功率转换器的输出的负载，非线性地调整功率转换器的偏置绕组电压。

公开(公告)号：US07760518B2

公开(公告)日：2010-07-20

申请号：US12424302

申请日：2009-04-15

申请人： Stefan Bäurle ,  William M. Polivka

发明人： Stefan Bäurle ,  William M. Polivka

IPC分类号： H02M3/335

CPC分类号： H02M3/33507 ,  H02M1/32 ,  H02M1/36

摘要： Techniques are disclosed to detect a fault in the feedback circuit of a switching power supply while the power supply operates in a mode where the output is below its regulated value. The power supply delivers maximum power at a given switching frequency without a feedback signal while the output is below its regulated value. A fault protection circuit substantially reduces the average output power if there is no feedback signal for the duration of a fault time. When there is no feedback signal, the power supply increases the maximum output power by increasing the switching frequency before the end of the fault time to increase the output to a regulated value. The presence of a feedback signal when the output reaches a regulated value restores the original switching frequency and returns the output to its unregulated value. The absence of a feedback signal at the end of the fault time engages the fault protection circuit to substantially reduce the output power.

摘要翻译： 公开了用于检测开关电源的反馈电路中的故障的技术，同时电源以输出低于其调节值的模式操作。 电源在给定开关频率下提供最​​大功率，而无需反馈信号，而输出低于其调节值。 如果在故障时间的持续时间内没有反馈信号，则故障保护电路大大降低了平均输出功率。 当没有反馈信号时，电源通过在故障时间结束之前增加开关频率来增加最大输出功率，以将输出增加到一个规定值。 当输出达到规定值时反馈信号的存在恢复原始开关频率并将输出返回到其未调节值。 在故障时间结束时没有反馈信号与故障保护电路相结合，从而显着降低输出功率。

公开(公告)号：US20100156378A1

公开(公告)日：2010-06-24

申请号：US12714335

申请日：2010-02-26

申请人： William M. Polivka

发明人： William M. Polivka

IPC分类号： G05F1/10

CPC分类号： H02M3/33507

摘要： A power supply control circuit is disclosed. In one aspect, a power supply control circuit includes a controller to be coupled to a switch to regulate an output of a power supply in response to a feedback signal and a parameter change signal. A parameter response circuit is coupled to generate the parameter change signal in response to a difference between a first value of a parameter measured before an event and a second value of the parameter measured after the event. The difference between the first value of the parameter and the second value of the parameter is representative of the relative efficiency of the power supply.

摘要翻译： 公开了电源控制电路。 一方面，电源控制电路包括控制器，其耦合到开关以响应于反馈信号和参数改变信号来调节电源的输出。 耦合参数响应电路以响应于在事件之前测量的参数的第一值与在事件之后测量的参数的第二值之间的差异来生成参数改变信号。 参数的第一个值和参数的第二个值之间的差值代表电源的相对效率。

公开(公告)号：US20090231888A1

公开(公告)日：2009-09-17

申请号：US12424302

申请日：2009-04-15

申请人： Stefan Baurle ,  William M. Polivka

发明人： Stefan Baurle ,  William M. Polivka

IPC分类号： H02M3/335

CPC分类号： H02M3/33507 ,  H02M1/32 ,  H02M1/36

摘要： Techniques are disclosed to detect a fault in the feedback circuit of a switching power supply while the power supply operates in a mode where the output is below its regulated value. The power supply delivers maximum power at a given switching frequency without a feedback signal while the output is below its regulated value. A fault protection circuit substantially reduces the average output power if there is no feedback signal for the duration of a fault time. When there is no feedback signal, the power supply increases the maximum output power by increasing the switching frequency before the end of the fault time to increase the output to a regulated value. The presence of a feedback signal when the output reaches a regulated value restores the original switching frequency and returns the output to its unregulated value. The absence of a feedback signal at the end of the fault time engages the fault protection circuit to substantially reduce the output power.

摘要翻译： 公开了用于检测开关电源的反馈电路中的故障的技术，同时电源以输出低于其调节值的模式操作。 电源在给定开关频率下提供最​​大功率，而无需反馈信号，而输出低于其调节值。 如果在故障时间的持续时间内没有反馈信号，则故障保护电路大大降低了平均输出功率。 当没有反馈信号时，电源通过在故障时间结束之前增加开关频率来增加最大输出功率，从而将输出增加到规定值。 当输出达到规定值时反馈信号的存在恢复原始开关频率并将输出返回到其未调节值。 在故障时间结束时没有反馈信号与故障保护电路相结合，从而显着降低输出功率。

公开(公告)号：US20090160489A1

公开(公告)日：2009-06-25

申请号：US11963645

申请日：2007-12-21

申请人： William M. Polivka

发明人： William M. Polivka

IPC分类号： H03K9/06

CPC分类号： H03K5/24 ,  G01R19/12 ,  H03M1/60

摘要： A time-differential analog comparator is disclosed. An example apparatus according to aspects of the present invention includes a source of a variable frequency signal having a frequency responsive to an analog input. A counting circuit is coupled to count cycles of the variable frequency signal. The counting circuit is coupled to count in a first direction for a first time interval and is coupled to count in a second direction opposite to the first direction for a second time interval that occurs after an end of the first time interval. An evaluation circuit is coupled to the counting circuit. The evaluation circuit is responsive to the count of the cycles of the variable frequency signal after an end of the second time interval.

摘要翻译： 公开了一种时差微分模拟比较器。 根据本发明的方面的示例性装置包括具有响应于模拟输入的频率的可变频率信号的源。 计数电路耦合到可变频率信号的周期。 计数电路被耦合以在第一方向上计数第一时间间隔，并且在与第一方向相反的第二方向上耦合以在第一时间间隔结束之后发生的第二时间间隔进行计数。 评估电路耦合到计数电路。 评估电路响应于在第二时间间隔结束之后的可变频率信号的周期的计数。

公开(公告)号：US07538533B2

公开(公告)日：2009-05-26

申请号：US12125839

申请日：2008-05-22

申请人： Stefan Bäurle ,  David Michael Hugh Matthews ,  William M. Polivka

发明人： Stefan Bäurle ,  David Michael Hugh Matthews ,  William M. Polivka

IPC分类号： G05F1/40 ,  H02H7/122

CPC分类号： H02M3/33507

摘要： Various techniques directed to providing temporary peak power from a switching regulator are disclosed. In one aspect, a switching regulator includes a switch that is to be coupled between a power supply input and an energy transfer element of the power supply. A controller is coupled to be responsive to a feedback signal to be received from an output of the power supply. The controller is coupled to switch the switch in response to the feedback signal to regulate the output of the power supply. An oscillator is coupled to provide an oscillating signal to the controller to determine a maximum switching frequency of the switch. The oscillating signal is coupled to oscillate at a first frequency under a first moderate load condition at the power supply output. The oscillating signal is coupled to oscillate at a second frequency under a second peak load condition at the power supply output.

摘要翻译： 公开了用于提供来自开关调节器的临时峰值功率的各种技术。 在一个方面，开关调节器包括要耦合在电源输入和电源的能量传递元件之间的开关。 控制器被耦合以响应于从电源的输出接收的反馈信号。 控制器耦合以响应于反馈信号切换开关以调节电源的输出。 振荡器被耦合以向控制器提供振荡信号以确定开关的最大开关频率。 振荡信号被耦合以在电源输出处的第一中等负载条件下以第一频率振荡。 振荡信号被耦合以在电源输出处的第二峰值负载条件下以第二频率振荡。