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1. 发明申请

US20170019015A1 SWITCHING REGULATOR WITH CONTROLLABLE DEAD TIME AND QUICK START 有权
标题翻译：切换稳压器，可控死区时间快速启动
公开(公告)号：US20170019015A1
公开(公告)日：2017-01-19
申请号：US14798903
申请日：2015-07-14
申请人： Allegro Microsystems, LLC
发明人： Joshua Wibben
IPC分类号： H02M1/08
CPC分类号： H02M1/36 , H02M1/38 , H02M3/1588 , Y02B70/1466
摘要： A driver circuit for driving a switching transistor includes a dead time calibration circuit and/or a quick start circuit. The dead time calibration circuit includes a delay comparator to compare a present delay between the low side switch turning off or the high side switch turning off and a voltage at a switch node between the high side switch and the low side switch to a past delay and a controller responsive to the comparison is configured to adjust the delay of an adjustable delay element coupled to a control terminal of a switching transistor. The quick start circuit includes a quick start signal generator having an adjustable delay element to generate a quick start signal having a pulse to turn on the switching transistor for a quick start interval, a quick start comparator configured to monitor the quick start signal, and a control circuit responsive to the comparison by the quick start comparator to adjust the delay of the delay element.
摘要翻译：用于驱动开关晶体管的驱动电路包括死区时间校准电路和/或快速启动电路。死区校准电路包括延迟比较器，用于比较低侧开关关断或高侧开关关断之间的当前延迟与高侧开关与低侧开关之间的开关节点处的电压到过去的延迟，响应于比较的控制器被配置为调整耦合到开关晶体管的控制端子的可调节延迟元件的延迟。快速启动电路包括具有可调节延迟元件的快速启动信号发生器，以产生具有脉冲以启动开关晶体管以进行快速启动间隔的快速启动信号，配置为监视快速启动信号的快速启动比较器，以及控制电路响应于快速启动比较器的比较来调整延迟元件的延迟。

2. 发明授权

US09537383B1 Switching regulator with controllable dead time and quick start 有权
标题翻译：开关稳压器具有可控死区和快速启动
公开(公告)号：US09537383B1
公开(公告)日：2017-01-03
申请号：US14798903
申请日：2015-07-14
申请人： Allegro Microsystems, LLC
发明人： Joshua Wibben
IPC分类号： H02M3/158 , H02M1/08
CPC分类号： H02M1/36 , H02M1/38 , H02M3/1588 , Y02B70/1466
摘要： A driver circuit for driving a switching transistor includes a dead time calibration circuit and/or a quick start circuit. The dead time calibration circuit includes a delay comparator to compare a present delay between the low side switch turning off or the high side switch turning off and a voltage at a switch node between the high side switch and the low side switch to a past delay and a controller responsive to the comparison is configured to adjust the delay of an adjustable delay element coupled to a control terminal of a switching transistor. The quick start circuit includes a quick start signal generator having an adjustable delay element to generate a quick start signal having a pulse to turn on the switching transistor for a quick start interval, a quick start comparator configured to monitor the quick start signal, and a control circuit responsive to the comparison by the quick start comparator to adjust the delay of the delay element.
摘要翻译：用于驱动开关晶体管的驱动电路包括死区时间校准电路和/或快速启动电路。死区校准电路包括延迟比较器，用于比较低侧开关关断或高侧开关关断之间的当前延迟与高侧开关与低侧开关之间的开关节点处的电压到过去的延迟，响应于比较的控制器被配置为调整耦合到开关晶体管的控制端子的可调节延迟元件的延迟。快速启动电路包括具有可调节延迟元件的快速启动信号发生器，以产生具有脉冲以启动开关晶体管以进行快速启动间隔的快速启动信号，配置为监视快速启动信号的快速启动比较器，以及控制电路响应于快速启动比较器的比较来调整延迟元件的延迟。

3. 发明授权

US09425785B1 Switching regulator with controllable slew rate 有权
标题翻译：开关稳压器具有可控压摆率
公开(公告)号：US09425785B1
公开(公告)日：2016-08-23
申请号：US14798912
申请日：2015-07-14
申请人： Allegro Microsystems, LLC
发明人： Joshua Wibben
IPC分类号： H03B1/00 , H03K3/00 , H03K17/16 , H03K5/05
CPC分类号： H03K17/165 , H02M1/38 , H02M3/1588 , H03K5/05
摘要： A driver circuit for driving a switching transistor having a control terminal responsive to a switching control signal includes a plurality of driver stages, each having a control input responsive to a respective driver control signal and an output coupled to the output of the other driver stages and to the control terminal of the switching transistor. At least one of the driver control signals has an on time that is delayed with respect to the other driver control signals. In an embodiment, at least two driver stages are on during a slew time interval.
摘要翻译：用于驱动具有响应于切换控制信号的控制终端的开关晶体管的驱动器电路包括多个驱动器级，每个驱动级具有响应于相应驱动器控制信号的控制输入和耦合到其它驱动级的输出的输出，以及到开关晶体管的控制端子。驱动器控制信号中的至少一个具有相对于其他驱动器控制信号延迟的导通时间。在一个实施例中，在回转时间间隔期间至少两个驱动器级接通。

4. 发明申请

US20150194880A1 CIRCUITS AND TECHNIQUES FOR IMPROVING REGULATION IN A REGULATOR HAVING MORE THAN ONE MODE OF OPERATION 有权
标题翻译：在具有多种操作模式的调节器中改进调节的电路和技术
公开(公告)号：US20150194880A1
公开(公告)日：2015-07-09
申请号：US14132534
申请日：2014-01-09
申请人： Allegro Microsystems, LLC
发明人： Joshua Wibben
IPC分类号： H02M3/156
CPC分类号： H02M3/156 , H02M2001/0025 , H02M2001/0032 , H02M2001/0045 , Y02B70/16
摘要： A switching regulator control circuit comprises a first control circuit to control conduction of the switch according to a first mode of operation and having a regulation point and a second control circuit to control conduction of the switch according to a second mode of operation in response to a reference signal that is calibrated to have a predetermined relationship with respect to the regulation point of the first control circuit. In some embodiments, the reference signal is calibrated to be a predetermined amount greater than the regulation point of the first control circuit and may be calibrated during the first mode of operation or in response to a regulator start or restart event.
摘要翻译：开关调节器控制电路包括：第一控制电路，用于根据第一操作模式控制开关的导通并具有调节点;以及第二控制电路，用于响应于第二操作模式控制开关的导通参考信号被校准为相对于第一控制电路的调节点具有预定的关系。在一些实施例中，参考信号被校准为大于第一控制电路的调节点的预定量，并且可以在第一操作模式期间或者响应于调节器启动或重启事件进行校准。

5. 发明授权

US09641070B2 Circuits and techniques for detecting an open pin condition of an integrated circuit 有权
公开(公告)号：US09641070B2
公开(公告)日：2017-05-02
申请号：US14301487
申请日：2014-06-11
申请人： Allegro Microsystems, LLC
发明人： Joshua Wibben
IPC分类号： G01R31/02 , H02M3/156 , G01R31/28 , G01R31/40 , H02M1/32 , H02M1/00
CPC分类号： H02M3/156 , G01R31/025 , G01R31/2853 , G01R31/40 , H02M1/32 , H02M2001/0025
摘要： An integrated circuit an open pin detector includes a current source coupled to the pin, a comparator having a first input coupled to the pin, a second input responsive to a threshold voltage, and an output at which a comparator output signal is provided. A controller is responsive to the comparator output signal to provide an enable signal to the current source and an open pin signal indicative of an open pin condition at the pin. A method for detecting an open pin condition of a pin of an integrated circuit includes comparing the pin voltage to a first threshold voltage level, initiating open pin detection in response to the pin voltage falling below the first threshold voltage level, such as by providing a current to the pin, and indicating an open pin condition if the pin voltage rises to exceed a second threshold voltage level within a predetermined time interval. Also described is preventing the pin voltage from exceeding a predetermined voltage level during open pin detection.

6. 发明授权

US09621036B2 Circuits and techniques for improving regulation in a regulator having more than one mode of operation 有权
公开(公告)号：US09621036B2
公开(公告)日：2017-04-11
申请号：US14132534
申请日：2014-01-09
申请人： Allegro Microsystems, LLC
发明人： Joshua Wibben
IPC分类号： H02M3/156 , H02M1/00
CPC分类号： H02M3/156 , H02M2001/0025 , H02M2001/0032 , H02M2001/0045 , Y02B70/16
摘要： A switching regulator control circuit comprises a first control circuit to control conduction of the switch according to a first mode of operation and having a regulation point and a second control circuit to control conduction of the switch according to a second mode of operation in response to a reference signal that is calibrated to have a predetermined relationship with respect to the regulation point of the first control circuit. In some embodiments, the reference signal is calibrated to be a predetermined amount greater than the regulation point of the first control circuit and may be calibrated during the first mode of operation or in response to a regulator start or restart event.

7. 发明授权

US10367500B2 Switching voltage regulator with variable minimum off-time 有权
公开(公告)号：US10367500B2
公开(公告)日：2019-07-30
申请号：US15835961
申请日：2017-12-08
申请人： Allegro MicroSystems, LLC
发明人： Joshua Wibben
IPC分类号： H02M3/158 , H03K17/687 , G05F1/575 , H02M3/157
摘要： A switching voltage regulator with variable minimum off-time. The value of the minimum off-time may depend on the voltage across a bootstrap capacitor. The value of the minimum off-time defines a minimum time for a switch to be open and to allow the bootstrap capacitor to charge.

8. 发明申请

US20190181859A1 SWITCHING VOLTAGE REGULATOR WITH VARIABLE MINIMUM OFF-TIME 审中-公开
公开(公告)号：US20190181859A1
公开(公告)日：2019-06-13
申请号：US15835961
申请日：2017-12-08
申请人： Allegro MicroSystems, LLC
发明人： Joshua Wibben
IPC分类号： H03K17/687 , H02M3/158 , H02M3/157 , G05F1/575
CPC分类号： H03K17/6871 , G05F1/575 , H02M1/08 , H02M3/157 , H02M3/158 , H03K2217/0081
摘要： A switching voltage regulator with variable minimum off-time. The value of the minimum off-time may depend on the voltage across a bootstrap capacitor.

9. 发明授权

US09774257B2 Control circuit for a switching regulator driving an LED load with controlled PWM dimming 有权
公开(公告)号：US09774257B2
公开(公告)日：2017-09-26
申请号：US14620656
申请日：2015-02-12
申请人： Allegro Microsystems, LLC
发明人： Joshua Wibben , Kurt Kimber , Peter Tod
IPC分类号： H02M3/158 , H05B33/08
CPC分类号： H02M3/158 , H05B33/0845 , H05B33/0851
摘要： A switching regulator control circuit includes a circuit configured to generate a control signal to control conduction of the regulator switch in response to a reference signal that is ramped to control a rate of change of the regulated output of the regulator and the control signal is gated in response to a PWM signal.

10. 发明申请

US20150362550A1 Circuits and Techniques for Detecting an Open Pin Condition of an Integrated Circuit 有权
标题翻译：用于检测集成电路的开路引脚状态的电路和技术
公开(公告)号：US20150362550A1
公开(公告)日：2015-12-17
申请号：US14301487
申请日：2014-06-11
申请人： Allegro Microsystems, LLC
发明人： Joshua Wibben
IPC分类号： G01R31/28 , G01R31/02
CPC分类号： H02M3/156 , G01R31/025 , G01R31/2853 , G01R31/40 , H02M1/32 , H02M2001/0025
摘要： As integrated circuit as open pin detector includes a current source coupled to the pin, a comparator having a first input coupled to the pin, a second input responsive to a threshold voltage, and an output at which a comparator output signal is provided. A controller is responsive to the comparator output signal to provide an enable signed, to the current source and an open pin signal indicative of an open pin condition at the pin. An open pin condition can be detected by comparing the pin voltage to a first threshold voltage level initiating open pin detection in response to the pin voltage falling below the first threshold voltage level, such as by providing a current to the pin, and indicating an open pin condition if the pin voltage rises to exceed a second threshold voltage level within a predetermined time interval. The pin voltage may be prevented from exceeding a predetermined voltage level during open pin detection.
摘要翻译：由于作为开路引脚检测器的集成电路包括耦合到引脚的电流源，具有耦合到引脚的第一输入的比较器，响应阈值电压的第二输入和提供比较器输出信号的输出。控制器响应于比较器输出信号，以向该电流源提供启用符号，以及指示引脚处的打开引脚状态的开放引脚信号。可以通过将引脚电压与启动打开引脚检测的第一阈值电压电平进行比较来检测打开引脚状态，以响应于引脚电压低于第一阈值电压电平，例如通过向引脚提供电流并指示开路如果在预定时间间隔内引脚电压上升到超过第二阈值电压电平，则引脚状态。在打开引脚检测期间，可以防止引脚电压超过预定电压电平。

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