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1.发明授权Controlling an LED string using a current sink with low side voltage regulation 有权使用低侧电压调节的电流吸收器控制LED串公开(公告)号：US09544954B2
公开(公告)日：2017-01-10
申请号：US14328936
申请日：2014-07-11
发明人： Kevin D'Angelo , Andrew Whyte , Gustavo Mehas
IPC分类号： H05B33/08
CPC分类号： H05B33/0815 , H05B33/0812 , H05B33/0848
摘要： A method of controlling an LED string having a first end coupled to a power source and a second end coupled to a first end of a current sink is provided. The method include generating a target voltage at a first end of an external inductor coupled to the second end of the current sink, comparing the target voltage to a measured voltage at the first end of the external inductor, charging the external inductor responsive to the measured voltage being greater than the target voltage, and discharging the external inductor responsive to the measured voltage being less than the target voltage.
摘要翻译： 提供了一种控制LED串的方法，其具有耦合到电源的第一端和耦合到电流汇的第一端的第二端。 该方法包括在耦合到电流吸收器的第二端的外部电感器的第一端产生目标电压，将目标电压与在外部电感器的第一端处的测量电压进行比较，对外部电感器进行充电，响应于所测量的 电压大于目标电压，并且响应于测量的电压小于目标电压，对外部电感器进行放电。
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公开(公告)号：US20140333272A1
公开(公告)日：2014-11-13
申请号：US14340292
申请日：2014-07-24
发明人： Kevin D'Angelo , Robert Wrathall
IPC分类号： H02M3/156
CPC分类号： H02M3/156 , H02M1/08 , H02M3/1588 , Y02B70/1466
摘要： A switching regulator that includes a high-side MOSFET, a low-side MOSFET, a high-side driver circuit, a low-side driver circuit, and a capacitive coupling circuit. An output of the high-side driver circuit is coupled to a gate of the high-side MOSFET to control the high-side MOSFET to be substantially depleted during a first operational phase and to be substantially enhanced during a second operational phase. An output of the low-side driver circuit is coupled to a gate of the low-side MOSFET to control the low-side MOSFET to be substantially enhanced during the first operational phase and to provide a regulated drain-to-source current during the second operational phase. The capacitive coupling circuit is coupled to an input of the high-side driver circuit and the gate of the low-side MOSFET and decreases the regulated drain-to-source current during a transition from the first operational phase to the second operational phase.
摘要翻译： 一种开关稳压器，包括高边MOSFET，低端MOSFET，高侧驱动电路，低侧驱动电路和电容耦合电路。 高侧驱动电路的输出耦合到高侧MOSFET的栅极，以控制高边MOSFET在第一操作阶段期间基本上耗尽，并且在第二操作阶段期间将显着增强。 低侧驱动电路的输出耦合到低侧MOSFET的栅极，以在第一操作阶段期间基本上增强低边MOSFET的控制，并且在第二操作阶段期间提供稳定的漏极 - 源极电流 操作阶段 电容耦合电路耦合到高侧驱动电路的输入端和低侧MOSFET的栅极，并且在从第一操作阶段到第二操作阶段的转变期间减小了调节的漏极 - 源极电流。
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3.发明授权Single ended primary inductor converter with over-current and/or over-voltage protection and method for controlling the same 有权具有过流和/或过压保护的单端初级电感转换器及其控制方法公开(公告)号：US08704503B2
公开(公告)日：2014-04-22
申请号：US13735940
申请日：2013-01-07
IPC分类号： G05F1/44
CPC分类号： H02H3/20 , G05F1/46 , H02M1/32 , H02M3/005 , H02M2003/1557
摘要： A SEPIC converter with over-voltage protection includes a high-side inductor that connects a node Vw to a node Vx. The node Vx is connected, in turn to ground by a power MOSFET. The node Vx is also connected to a node Vy by a first capacitor. The node Vy is connected to ground by a low-side inductor. A rectifier diode further connects the node Vy and a node Vout and an output capacitor is connected between the node Vout and ground. A PWM control circuit is connected to drive the power MOSFET. An over-voltage protection MOSFET connects an input supply to the PWM control circuit and the node Vw. A comparator monitors the voltage of the input supply. If that voltage exceeds a predetermined value Vref the comparator output causes the over-voltage protection MOSFET to disconnect the node Vw and the PWM control circuit from the input supply.
摘要翻译： 具有过电压保护的SEPIC转换器包括将节点Vw连接到节点Vx的高侧电感器。 节点Vx通过功率MOSFET连接到地。 节点Vx也通过第一电容器连接到节点Vy。 节点Vy通过低侧电感器接地。 整流二极管还连接节点Vy和节点Vout，输出电容器连接在节点Vout和地之间。 连接PWM控制电路来驱动功率MOSFET。 过压保护MOSFET将输入电源连接到PWM控制电路和节点Vw。 比较器监视输入电源的电压。 如果该电压超过预定值Vref，则比较器输出使过电压保护MOSFET从输入电源断开节点Vw和PWM控制电路。
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4.发明授权Operational transconductance amplifier feedback mechanism for fixed feedback voltage regulators 有权用于固定反馈电压调节器的运算跨导放大器反馈机制公开(公告)号：US09063557B2
公开(公告)日：2015-06-23
申请号：US14021579
申请日：2013-09-09
发明人： Kevin D'Angelo
CPC分类号： G05F1/46 , H02M3/156 , H05B33/0815 , H05B33/0827 , H05B33/0848
摘要： An operational transconductance amplifier used in conjunction with a multiple chip voltage feedback technique allows multiple strings of LEDs and current sinks to be efficiently powered by a simple feedback oriented voltage regulator within an appliance. A connected series of differential amplifiers or multiplexors are used to monitor the voltages between the connected LEDs and the current sinks, in order to progressively determine the lowest voltage. The operational transconductance amplifier compares this voltage to a reference voltage and injects or removes current from the feedback node of a voltage regulator, thereby altering the voltage present at the feedback node. This causes the voltage regulator to adjust its output, ensuring that the current sinks of the LED strings have adequate voltage with which to function, even as the LEDs have different forward voltages and the strings are asynchronously enabled and disabled.
摘要翻译： 与多芯片电压反馈技术结合使用的运算跨导放大器允许多个LED串和电流吸收器由设备内的简单的反馈取向的电压调节器有效地供电。 使用连接的差分放大器或多路复用器系列来监视连接的LED和电流吸收器之间的电压，以便逐步确定最低电压。 操作跨导放大器将该电压与参考电压进行比较，并从电压调节器的反馈节点注入或去除电流，从而改变反馈节点处的电压。 这使得电压调节器调节其输出，确保LED串的电流吸收器具有足够的电压，即使LED具有不同的正向电压，并且串是异步启用和禁用的。
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公开(公告)号：US20140340063A1
公开(公告)日：2014-11-20
申请号：US14453956
申请日：2014-08-07
发明人： Kevin D'Angelo
CPC分类号： H01L27/02 , G05F1/46 , G05F3/262 , H01L2227/00 , H01L2229/00 , H02M3/158
摘要： An integrated circuit for controlling a boost converter. The integrated circuit includes a gate pin, a source pin, a feedback pin, a current mirror sub-circuit, and a control sub-circuit. The current mirror sub-circuit is connected to the source pin to produce an output current from a reference current flowing between the source pin and ground, the reference current being larger than the output current. The control sub-circuit is connected to the current mirror sub-circuit, the gate pin and the feedback pin to control a gate voltage provided to the gate pin based on the output current and a feedback voltage at the feedback pin
摘要翻译： 一种用于控制升压转换器的集成电路。 集成电路包括栅极引脚，源极引脚，反馈引脚，电流镜子电路和控制子电路。 电流镜子电路连接到源极引脚，从源极和地之间产生的参考电流产生输出电流，参考电流大于输出电流。 控制子电路连接到电流镜子电路，栅极引脚和反馈引脚，以根据输出电流和反馈引脚上的反馈电压来控制提供给栅极引脚的栅极电压
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公开(公告)号：US09236371B2
公开(公告)日：2016-01-12
申请号：US14453956
申请日：2014-08-07
发明人： Kevin D'Angelo
CPC分类号： H01L27/02 , G05F1/46 , G05F3/262 , H01L2227/00 , H01L2229/00 , H02M3/158
摘要： An integrated circuit for controlling a boost converter. The integrated circuit includes a gate pin, a source pin, a feedback pin, a current mirror sub-circuit, and a control sub-circuit. The current mirror sub-circuit is connected to the source pin to produce an output current from a reference current flowing between the source pin and ground, the reference current being larger than the output current. The control sub-circuit is connected to the current mirror sub-circuit, the gate pin and the feedback pin to control a gate voltage provided to the gate pin based on the output current and a feedback voltage at the feedback pin.
摘要翻译： 一种用于控制升压转换器的集成电路。 集成电路包括栅极引脚，源极引脚，反馈引脚，电流镜子电路和控制子电路。 电流镜子电路连接到源极引脚，从源极和地之间产生的参考电流产生输出电流，参考电流大于输出电流。 控制子电路连接到电流镜子电路，栅极引脚和反馈引脚，以根据输出电流和反馈引脚的反馈电压来控制提供给栅极引脚的栅极电压。
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7.发明申请公开(公告)号：US20140320032A1
公开(公告)日：2014-10-30
申请号：US14328936
申请日：2014-07-11
发明人： Kevin D'Angelo , Andrew Whyte , Gustavo Mehas
IPC分类号： H05B33/08
CPC分类号： H05B33/0815 , H05B33/0812 , H05B33/0848
摘要： A method of controlling an LED string having a first end coupled to a power source and a second end coupled to a first end of a current sink is provided. The method include generating a target voltage at a first end of an external inductor coupled to the second end of the current sink, comparing the target voltage to a measured voltage at the first end of the external inductor, charging the external inductor responsive to the measured voltage being greater than the target voltage, and discharging the external inductor responsive to the measured voltage being less than the target voltage.
摘要翻译： 提供了一种控制LED串的方法，其具有耦合到电源的第一端和耦合到电流汇的第一端的第二端。 该方法包括在耦合到电流吸收器的第二端的外部电感器的第一端产生目标电压，将目标电压与在外部电感器的第一端处的测量电压进行比较，对外部电感器进行充电，响应于所测量的 电压大于目标电压，并且响应于测量的电压小于目标电压，对外部电感器进行放电。
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8.发明申请OPERATIONAL TRANSCONDUCTANCE AMPLIFIER FEEDBACK MECHANISM FOR FIXED FEEDBACK VOLTAGE REGULATORS 审中-公开固定式反馈电压调节器的运行放大器放大器反馈机构公开(公告)号：US20140042997A1
公开(公告)日：2014-02-13
申请号：US14021579
申请日：2013-09-09
发明人： Kevin D'Angelo
IPC分类号： G05F1/46
CPC分类号： G05F1/46 , H02M3/156 , H05B33/0815 , H05B33/0827 , H05B33/0848
摘要： An operational transconductance amplifier used in conjunction with a multiple chip voltage feedback technique allows multiple strings of LEDs and current sinks to be efficiently powered by a simple feedback oriented voltage regulator within an appliance. A connected series of differential amplifiers or multiplexors are used to monitor the voltages between the connected LEDs and the current sinks, in order to progressively determine the lowest voltage. The operational transconductance amplifier compares this voltage to a reference voltage and injects or removes current from the feedback node of a voltage regulator, thereby altering the voltage present at the feedback node. This causes the voltage regulator to adjust its output, ensuring that the current sinks of the LED strings have adequate voltage with which to function, even as the LEDs have different forward voltages and the strings are asynchronously enabled and disabled.
摘要翻译： 与多芯片电压反馈技术结合使用的运算跨导放大器允许多个LED串和电流吸收器由设备内的简单的反馈取向的电压调节器有效地供电。 使用连接的差分放大器或多路复用器系列来监视连接的LED和电流吸收器之间的电压，以便逐步确定最低电压。 操作跨导放大器将该电压与参考电压进行比较，并从电压调节器的反馈节点注入或去除电流，从而改变反馈节点处的电压。 这使得电压调节器调节其输出，确保LED串的电流吸收器具有足够的电压，即使LED具有不同的正向电压，并且串是异步启用和禁用的。
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