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1. 发明申请

US20070035285A1 Methods and apparatus for maintaining an approximate constant current output characteristic in a switched mode power supply 失效
公开(公告)号：US20070035285A1
公开(公告)日：2007-02-15
申请号：US11582628
申请日：2006-10-17
申请人： Balu Balakrishnan , Alex Djenguerian , Kent Wong , David Hugh Matthews , Erdem Bircan
发明人： Balu Balakrishnan , Alex Djenguerian , Kent Wong , David Hugh Matthews , Erdem Bircan
IPC分类号： G05F1/00
CPC分类号： H02M3/33507 , H02M3/156 , H02M2001/0006
摘要： A regulator circuit maintaining an approximate constant current output characteristic. In one aspect, a disclosed regulator controls a switch that has a current limit threshold. A supply terminal and feedback terminal of the regulator are connected together as a control terminal such that a shunt regulator current is the control terminal current in excess of the internal supply current consumed by the regulator. The current limit threshold of the switch is changed as a function of the shunt regulator current. In another aspect, a control input of the regulator circuit receives a current that is the sum of the internal supply current consumed by the regulator circuit and a feedback current. The feedback current is a fraction of the consumption current of the regulator circuit and the current limit threshold of the switch is changed as a function of the feedback current.

2. 发明申请

US20060181253A1 Method and apparatus for reducing audio noise in a switching regulator 有权
公开(公告)号：US20060181253A1
公开(公告)日：2006-08-17
申请号：US11404688
申请日：2006-04-14
申请人： Balu Balakrishnan , Alex Djenguerian , Kent Wong
发明人： Balu Balakrishnan , Alex Djenguerian , Kent Wong
IPC分类号： G05F1/573
CPC分类号： H02M3/33507 , H02M1/44 , H02M3/33515 , H02M2001/0025 , H02M2001/0032 , Y02B70/16
摘要： A switching regulator utilizing on/off control that reduces audio noise at light loads by adjusting the current limit of the switching regulator. In one embodiment, a switching regulator includes a state machine that adjusts the current limit of the switching regulator based on a pattern of feedback signal values from the output of the power supply for a preceding N cycles of the drive signal. The state machine adjusts the current limit lower at light loads such that cycles are not skipped to reduce the operating frequency of the switching regulator into the audio frequency range until the flux density through the transformer is sufficiently low to reduce the generation of audio noise.

3. 发明申请

US20050088161A1 Method and apparatus for maintaining an approximate constant current output characteristic in a switched mode power supply 有权
标题翻译：用于在开关模式电源中维持近似恒定电流输出特性的方法和装置
公开(公告)号：US20050088161A1
公开(公告)日：2005-04-28
申请号：US10987525
申请日：2004-11-12
申请人： Balu Balakrishnan , Alex Djenguerian , Kent Wong , David Hugh Matthews , Erdem Bircan
发明人： Balu Balakrishnan , Alex Djenguerian , Kent Wong , David Hugh Matthews , Erdem Bircan
IPC分类号： H02M3/28 , H02M3/155 , H02M3/156 , H02M3/335 , G05F1/40
CPC分类号： H02M3/33507 , H02M3/156 , H02M2001/0006
摘要： A regulator circuit maintaining an approximate constant current output characteristic. In one aspect, a disclosed regulator controls a switch that has a current limit threshold. A supply terminal and feedback terminal of the regulator are connected together as a control terminal such that a shunt regulator current is the control terminal current in excess of the internal supply current consumed by the regulator. The current limit threshold of the switch is changed as a function of the shunt regulator current. In another aspect, a control input of the regulator circuit receives a current that is the sum of the internal supply current consumed by the regulator circuit and a feedback current. The feedback current is a fraction of the consumption current of the regulator circuit and the current limit threshold of the switch is changed as a function of the feedback current.
摘要翻译：一种保持近似恒流输出特性的稳压电路。在一个方面，所公开的调节器控制具有电流限制阈值的开关。调节器的电源端子和反馈端子作为控制端子连接在一起，使得并联调节器电流是超过调节器消耗的内部电源电流的控制端子电流。开关的电流限制阈值作为分流调节器电流的函数而改变。在另一方面，调节器电路的控制输入接收作为调节器电路消耗的内部电源电流与反馈电流之和的电流。反馈电流是调节器电路的消耗电流的一小部分，并且开关的电流限制阈值作为反馈电流的函数而改变。

4. 发明申请

US20060176716A1 Method and apparatus for maintaining a constant load current with line voltage in a switch mode power supply 有权
标题翻译：用于在开关模式电源中用线电压维持恒定负载电流的方法和装置
公开(公告)号：US20060176716A1
公开(公告)日：2006-08-10
申请号：US11397524
申请日：2006-04-03
申请人： Balu Balakrishnan , Alex Djenguerian , Kent Wong , David Michael Matthews
发明人： Balu Balakrishnan , Alex Djenguerian , Kent Wong , David Michael Matthews
IPC分类号： H02M3/335
CPC分类号： H02M3/33523 , H02M3/33507 , H02M2001/0009 , H03K17/0822
摘要： A power supply including a regulation circuit that maintains an approximately constant load current with line voltage. An example circuit includes a switch including first, second and third terminals. The first terminal is coupled or decoupled to the second terminal in response to a control signal received at the third terminal. Voltage sense circuitry is included and is coupled to sense a voltage drop across the switch. The voltage drop is representative of a current in the switch during an on time of the switch. The voltage sense circuitry has a variable current limit threshold that increases between a first level and a second level during the on time of the switch. The control signal is responsive to the variable current limit threshold to regulate a power supply with an output characteristic having an approximately constant output voltage below an output current threshold and an approximately constant output current below an output voltage threshold.
摘要翻译：一种电源，包括一个调节电路，该电路用线路电压保持大致恒定的负载电流。示例电路包括包括第一，第二和第三端子的开关。响应于在第三终端处接收到的控制信号，第一终端被耦合或去耦到第二终端。包括电压检测电路，并耦合以感测开关两端的电压降。电压降在开关导通时代表开关中的电流。电压检测电路具有可变电流限制阈值，其在开关导通时间在第一电平和第二电平之间增加。控制信号响应于可变电流限制阈值，以具有输出特性的输出特性来调节电源，输出特性具有低于输出电流阈值的近似恒定的输出电压和低于输出电压阈值的近似恒定的输出电流。

5. 发明申请

US20050168202A1 Method and apparatus for reducing audio noise in a switching regulator 有权
标题翻译：用于减少开关调节器中的音频噪声的方法和装置
公开(公告)号：US20050168202A1
公开(公告)日：2005-08-04
申请号：US11100065
申请日：2005-04-05
申请人： Balu Balakrishnan , Alex Djenguerian , Kent Wong
发明人： Balu Balakrishnan , Alex Djenguerian , Kent Wong
IPC分类号： H02M3/28 , H02M3/335
CPC分类号： H02M3/33507 , H02M1/44 , H02M3/33515 , H02M2001/0025 , H02M2001/0032 , Y02B70/16
摘要： A switching regulator utilizing on/off control that reduces audio noise at light loads by adjusting the current limit of the switching regulator. In one embodiment, a switching regulator includes a state machine that adjusts the current limit of the switching regulator based on a pattern of feedback signal values from the output of the power supply for a preceding N cycles of the drive signal. The state machine adjusts the current limit lower at light loads such that cycles are not skipped to reduce the operating frequency of the switching regulator into the audio frequency range until the flux density through the transformer is sufficiently low to reduce the generation of audio noise.
摘要翻译：利用开/关控制的开关调节器，通过调节开关调节器的电流限制来减轻轻负载时的音频噪声。在一个实施例中，开关调节器包括状态机，其基于来自驱动信号的先前N个周期的电源的输出的反馈信号值的模式来调整开关调节器的电流限制。状态机在轻负载下调节电流限制，使得不跳过周期以将开关调节器的工作频率降低到音频频率范围，直到通过变压器的磁通密度足够低以减少音频噪声的产生。

6. 发明申请

US20070285068A1 Method and apparatus for reducing audio noise in a switching regulator 有权
公开(公告)号：US20070285068A1
公开(公告)日：2007-12-13
申请号：US11729262
申请日：2007-03-27
申请人： Balu Balakrishnan , Alex Djenguerian , Kent Wong
发明人： Balu Balakrishnan , Alex Djenguerian , Kent Wong
IPC分类号： G05F1/573
CPC分类号： H02M3/33507 , H02M1/44 , H02M3/33515 , H02M2001/0025 , H02M2001/0032 , Y02B70/16
摘要： A switching regulator utilizing on/off control that reduces audio noise at light loads by adjusting the current limit of the switching regulator. In one embodiment, a switching regulator includes a state machine that adjusts the current limit of the switching regulator based on a pattern of feedback signal values from the output of the power supply for a preceding N cycles of the drive signal. The state machine adjusts the current limit lower at light loads such that cycles are not skipped to reduce the operating frequency of the switching regulator into the audio frequency range until the flux density through the transformer is sufficiently low to reduce the generation of audio noise.

7. 发明申请

US20070046294A1 Method and apparatus to select a parameter/mode based on a time measurement 有权
标题翻译：基于时间测量选择参数/模式的方法和装置
公开(公告)号：US20070046294A1
公开(公告)日：2007-03-01
申请号：US11213252
申请日：2005-08-26
申请人： David Matthews , Alex Djenguerian , Kent Wong , Balu Balakrishnan
发明人： David Matthews , Alex Djenguerian , Kent Wong , Balu Balakrishnan
IPC分类号： G01R31/12
CPC分类号： G01R27/26 , G01R27/2605 , H01L2924/0002 , H02M3/33523 , H02M2001/0025 , H01L2924/00
摘要： Techniques are disclosed to select functional parameters and/or operating modes of a circuit based on a time measurement are disclosed. One example integrated circuit includes a threshold detection and timing circuit that is coupled to measure a signal during an initialization period of the integrated circuit from a multifunction capacitor that is to be coupled to a first terminal of the integrated circuit. A selection circuit is coupled to the threshold detection and timing circuit to select a parameter/mode of the integrated circuit in response to the measured signal from the multifunction capacitor during the initialization period of the integrated circuit. The multifunction capacitor is coupled to provide an additional function for the integrated circuit after the initialization period of the integrated circuit is complete.
摘要翻译：公开了基于时间测量来选择功能参数和/或电路的操作模式的技术。一个示例集成电路包括阈值检测和定时电路，其被耦合以在集成电路的初始化周期期间从要耦合到集成电路的第一端子的多功能电容器测量信号。选择电路耦合到阈值检测和定时电路，以在集成电路的初始化期间响应于来自多功能电容器的测量信号来选择集成电路的参数/模式。多功能电容器被耦合以在集成电路的初始化周期完成之后为集成电路提供附加功能。

8. 发明申请

US20060028190A1 Method and apparatus for maintaining an approximate constant current output characteristic in a switched mode power supply 有权
公开(公告)号：US20060028190A1
公开(公告)日：2006-02-09
申请号：US11244469
申请日：2005-10-06
申请人： Balu Balakrishnan , Alex Djenguerian , Kent Wong , David Matthews , Erdem Bircan
发明人： Balu Balakrishnan , Alex Djenguerian , Kent Wong , David Matthews , Erdem Bircan
IPC分类号： G05F1/40
CPC分类号： H02M3/33507 , H02M3/156 , H02M2001/0006
摘要： A regulator circuit maintaining an approximate constant current output characteristic. In one aspect, a disclosed regulator controls a switch that has a current limit threshold. A supply terminal and feedback terminal of the regulator are connected together as a control terminal such that a shunt regulator current is the control terminal current in excess of the internal supply current consumed by the regulator. The current limit threshold of the switch is changed as a function of the shunt regulator current. In another aspect, a control input of the regulator circuit receives a current that is the sum of the internal supply current consumed by the regulator circuit and a feedback current. The feedback current is a fraction of the consumption current of the regulator circuit and the current limit threshold of the switch is changed as a function of the feedback current.

9. 发明申请

US20070182394A1 Method and apparatus for maintaining a constant load current with line voltage in a switch mode power supply 有权
标题翻译：用于在开关模式电源中用线电压维持恒定负载电流的方法和装置
公开(公告)号：US20070182394A1
公开(公告)日：2007-08-09
申请号：US11784560
申请日：2007-04-06
申请人： Balu Balakrishnan , Alex Djenguerian , Kent Wong , David Matthews
发明人： Balu Balakrishnan , Alex Djenguerian , Kent Wong , David Matthews
IPC分类号： G05F1/00
CPC分类号： H02M3/33523 , H02M3/33507 , H02M2001/0009 , H03K17/0822
摘要： A power supply including a regulation circuit that maintains an approximately constant load current with line voltage. In one embodiment, a regulation circuit includes a semiconductor switch and current sense circuitry to sense the current in the semiconductor switch. The current sense circuitry has a current limit threshold. The regulation circuit current limit threshold is varied from a first level to a second level during the time when the semiconductor switch is on. One embodiment of the regulation circuit is used in a power supply having an output characteristic having an approximately constant output voltage below an output current threshold and an approximately constant output current below an output voltage threshold.
摘要翻译：一种电源，包括一个调节电路，该电路用线路电压保持大致恒定的负载电流。在一个实施例中，调节电路包括用于感测半导体开关中的电流的半导体开关和电流检测电路。电流检测电路具有电流限制阈值。在半导体开关导通的时间期间，调节电路电流限制阈值从第一电平变化到第二电平。调节电路的一个实施例用于具有低于输出电流阈值的近似恒定的输出电压和低于输出电压阈值的近似恒定的输出电流的输出特性的电源。

10. 发明申请

US20100277838A1 FAULT CONDITION PROTECTION 有权
标题翻译：故障条件保护
公开(公告)号：US20100277838A1
公开(公告)日：2010-11-04
申请号：US12836518
申请日：2010-07-14
申请人： Balu Balakrishnan , Alex Djenguerian , Leif Lund
发明人： Balu Balakrishnan , Alex Djenguerian , Leif Lund
IPC分类号： H02H7/00
CPC分类号： H02M1/32 , B29C45/82 , B29C2045/824 , F16D31/02 , H02H7/1213 , H02M1/36 , H02M3/33507
摘要： A regulator for a switched mode power supply includes switching regulator logic, a counter and a logic gate. The switching regulator logic is coupled to receive a feedback signal and to generate a switching signal in response. The feedback signal periodically cycles between a first state and a second state when the power supply operates normally. The counter is coupled to receive the feedback signal and an output of the counter indicates an auto-restart mode of the regulator in response to the feedback signal remaining in the first state for a predetermined count. An output of the logic gate enables the power switch to turn on and off in response to the switching signal when the output of the counter does not indicate the auto-restart mode and the output of the logic gate disables the power switch in response to the output of the counter indicating the auto-restart mode.
摘要翻译：用于开关模式电源的稳压器包括开关稳压器逻辑，计数器和逻辑门。开关稳压器逻辑被耦合以接收反馈信号并且响应地产生开关信号。当电源正常工作时，反馈信号周期性地在第一状态和第二状态之间循环。计数器被耦合以接收反馈信号，并且计数器的输出指示响应于在第一状态下保持预定计数的反馈信号的调节器的自动重启模式。当计数器的输出不指示自动重启模式时，逻辑门的输出使得电源开关响应于开关信号而导通和截止，并且逻辑门的输出响应于计数器的输出指示自动重启模式。

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