公开(公告)号：US07119498B2

公开(公告)日：2006-10-10

申请号：US11012793

申请日：2004-12-14

申请人： David J. Baldwin ,  Sanmukh Patel

发明人： David J. Baldwin ,  Sanmukh Patel

IPC分类号： G05F1/00

CPC分类号： H05B33/0854 ,  H05B33/0884

摘要： A current control device for driving LED devices uses a switched-mode current control loop inside of an output intensity low-frequency pulse width modulation (PWM) control loop. This allows separate control of current level (for accurate light wavelength output) and light intensity. The current control device requires only one switch to regulate current level, and no other switches for the intensity control. This allows lower parts count for greater reliability and lower system cost.

摘要翻译： 用于驱动LED器件的电流控制装置在输出强度低频脉宽调制（PWM）控制回路内使用开关模式电流控制回路。 这允许单独控制电流水平（用于准确的光波长输出）和光强度。 电流控制装置只需要一个开关来调节电流电平，而没有其他开关用于强度控制。 这允许较低的部件数量更高的可靠性和更低的系统成本。

公开(公告)号：US06608521B1

公开(公告)日：2003-08-19

申请号：US10145417

申请日：2002-05-14

申请人： David J. Baldwin ,  Timothy J. Legat ,  Sanmukh Patel

发明人： David J. Baldwin ,  Timothy J. Legat ,  Sanmukh Patel

IPC分类号： H03F338

CPC分类号： H02M3/156

摘要： A control circuit (50) for a switch mode power converter having precise control of amplitude and frequency that does not exhibit overshoot error nor undershoot error during a fast charge cycle nor a fast discharge cycle, respectively. In a first embodiment, the control circuit (50) does not exhibit undershoot error during a fast discharge cycle. The control circuit (50) comprises an oscillator (70) for providing a periodic carrier signal comprising a sawtooth wave output signal (VST). The oscillator (70) includes a capacitor (CT2) charged and discharged to the power supply voltage (VCC) to provide the sawtooth wave output signal (VST). In addition, the oscillator (70) includes a switching circuit (65) coupled to the reference voltage level (Vref). The control circuit (50) further includes a gain circuit (64) having a reference voltage input (Vref2), voltage input (Vin) and an output (Out). The reference voltage input (Vref2) receives the reference voltage(Vref). The voltage input (Vin) connects to the capacitor (CT2). The output (Out) of the gain circuit (64) connects to the switching circuit (65) to provide feedback proportional to the analog error signal related to the difference between the sawtooth wave output signal (VST) and the predetermined reference voltage level (Vref).

摘要翻译： 一种用于开关模式功率转换器的控制电路（50），其分别具有在快速充电周期和快速放电周期期间不具有过冲误差的幅度和频率的精确控制或下冲误差。 在第一实施例中，控制电路（50）在快速放电周期期间不会出现下冲的误差。 控制电路（50）包括用于提供包括锯齿波输出信号（VST）的周期性载波信号的振荡器（70）。 振荡器（70）包括对电源电压（VCC）进行充放电以提供锯齿波输出信号（VST）的电容器（CT2）。 此外，振荡器（70）包括耦合到参考电压电平（Vref）的开关电路（65）。 控制电路（50）还包括具有参考电压输入（Vref2），电压输入（Vin）和输出（Out）的增益电路（64）。 参考电压输入（Vref2）接收参考电压（Vref）。 电压输入（Vin）连接到电容（CT2）。 增益电路（64）的输出（Out）连接到开关电路（65）以提供与与锯齿波输出信号（VST）和预定参考电压电平（Vref）之间的差相关的模拟误差信号成比例的反馈 ）。

公开(公告)号：US20060126245A1

公开(公告)日：2006-06-15

申请号：US11015315

申请日：2004-12-15

申请人： William Grose ,  Timothy Legat ,  Sanmukh Patel

发明人： William Grose ,  Timothy Legat ,  Sanmukh Patel

IPC分类号： H02H3/18

CPC分类号： H02H11/002

摘要： A reverse battery protection circuits that provides an integrated reverse battery condition solution for protection of external NMOS switches during the reverse battery condition is disclosed herein. This reverse battery protection circuit minimizes power consumption during a reverse battery event wherein there is no need for mechanical adjustments such as heat sinking and clamping to extract the heat away from the silicon and not destroy the device. Specifically, the reverse battery protection circuit includes a push-pull gate drive circuit coupled between the first and second power supply rail. A protection subcircuit portion connects between a first output node and the second power supply rail to turn the external FET ‘on’ during the reverse battery condition. In particular, the protection subcircuit portion connects to the external FET device and includes a p-channel device connected between a second output node that biases the external FET device and a first diode. A resistor connects between a first output node of the reverse battery protection circuit to provide a voltage drop between the drain terminal and the gate of the p-channel device. A second diode connects between the gate and the source of the p-channel device. In addition, a clamping circuit connects between the second output node and the third output node to provide clamping in the instance where the voltage at the second output node momentarily rises too high.

摘要翻译： 本文公开了一种反向电池保护电路，其在反向电池状态期间提供用于保护外部NMOS开关的集成反向电池状态解决方案。 这种反向电池保护电路在反向电池事件期间最小化功率消耗，其中不需要机械调节，例如散热和夹紧，以将热量从硅提取出来，而不会破坏设备。 具体地，反向电池保护电路包括耦合在第一和第二电源轨之间的推挽栅极驱动电路。 保护子电路部分连接在第一输出节点和第二电源轨道之间，以在反向电池状态期间使外部FET“接通”。 特别地，保护子电路部分连接到外部FET器件，并且包括连接在偏置外部FET器件的第二输出节点和第一二极管之间的p沟道器件。 电阻器连接在反向电池保护电路的第一输出节点之间，以在漏极端子和p沟道器件的栅极之间提供电压降。 第二个二极管连接在p沟道器件的栅极和源极之间。 此外，钳位电路连接在第二输出节点和第三输出节点之间，以在第二输出节点处的电压瞬间上升得过高的情况下提供钳位。

公开(公告)号：US20060132108A1

公开(公告)日：2006-06-22

申请号：US11017177

申请日：2004-12-20

申请人： Ross Teggatz ,  Sanmukh Patel ,  Rex Teggatz ,  Suribhotla Rajasekhar ,  Valerian Mayega

发明人： Ross Teggatz ,  Sanmukh Patel ,  Rex Teggatz ,  Suribhotla Rajasekhar ,  Valerian Mayega

IPC分类号： G05F1/40 ,  G05F1/618

CPC分类号： H02J7/0063

摘要： A programmable voltage regulator configurable for reverse blocking and double power density is disclosed herein. The programmable voltage regulator includes an error amplifier that couples to receive a reference voltage. A first NMOS pass transistor connects between an auxiliary voltage input node and the output terminal of the voltage regulator, wherein the first NMOS pass transistor is biased by the output of the error amplifier. Connected between the source of the first NMOS pass transistor and the second input of the error amplifier, a feedback network provides feedback for the voltage regulator. A second NMOS pass transistor connects between the first power supply and the auxiliary voltage input node. Furthermore, an independent node control circuit biases the second NMOS pass transistor such that in a first mode of operation, a first control signal input is operable to receive a signal for controlling the second NMOS pass transistor during reverse battery condition. In a second mode of operation, independent node control circuit includes a second control signal input that is operable to couple to the output terminal of the error amplifier while simultaneously the first power supply rail is operable to couple to the output terminal of the voltage regulator to provide double power density.

摘要翻译： 本文公开了可配置用于反向阻塞和双功率密度的可编程电压调节器。 可编程电压调节器包括耦合以接收参考电压的误差放大器。 第一NMOS传输晶体管连接在辅助电压输入节点和电压调节器的输出端之间，其中第一NMOS传输晶体管被误差放大器的输出偏置。 连接在第一NMOS传输晶体管的源极和误差放大器的第二输入端之间，反馈网络为电压调节器提供反馈。 第二NMOS传输晶体管连接在第一电源和辅助电压输入节点之间。 此外，独立节点控制电路偏置第二NMOS传输晶体管，使得在第一操作模式中，第一控制信号输入可操作以在反向电池状态期间接收用于控制第二NMOS传输晶体管的信号。 在第二操作模式中，独立节点控制电路包括第二控制信号输入，其可操作以耦合到误差放大器的输出端，同时第一电源轨可操作以耦合到电压调节器的输出端， 提供双倍功率密度。

公开(公告)号：US20050212459A1

公开(公告)日：2005-09-29

申请号：US10810943

申请日：2004-03-26

申请人： Sanmukh Patel ,  Zbigniew Lata ,  Ross Teggatz

发明人： Sanmukh Patel ,  Zbigniew Lata ,  Ross Teggatz

IPC分类号： G05F1/00 ,  H05B33/08

CPC分类号： H05B33/0827 ,  H05B33/0815 ,  H05B33/0818 ,  Y02B20/347

摘要： A system for controlling a plurality of load devices includes a high-side system operative to source current relative to at least two associated outputs. A low-side system is operative to sink current relative to a plurality of associated inputs. A control system controls the high-side system and the low-side system according to a multiplexing scheme that is operative to provide current to selected load devices of the plurality of load devices connected between the associated outputs and the associated inputs. The system can be implemented as an integrated circuit for driving the plurality of loads, which can include LED's.

摘要翻译： 用于控制多个负载装置的系统包括高侧系统，其操作以相对于至少两个相关联的输出源电流。 低侧系统用于相对于多个相关联的输入而吸收电流。 控制系统根据复用方案来控制高端系统和低侧系统，所述复用方案可操作以向连接在相关联的输出和相关输入之间的多个负载设备的选定负载设备提供电流。 该系统可以实现为用于驱动多个负载的集成电路，其可以包括LED。

公开(公告)号：US20050140315A1

公开(公告)日：2005-06-30

申请号：US11012793

申请日：2004-12-14

申请人： David Baldwin ,  Sanmukh Patel

发明人： David Baldwin ,  Sanmukh Patel

IPC分类号： G05F1/00 ,  H05B33/08

CPC分类号： H05B33/0854 ,  H05B33/0884

摘要： A current control device for driving LED devices uses a switched-mode current control loop inside of an output intensity low-frequency pulse width modulation (PWM) control loop. This allows separate control of current level (for accurate light wavelength output) and light intensity. The current control device requires only one switch to regulate current level, and no other switches for the intensity control. This allows lower parts count for greater reliability and lower system cost.

摘要翻译： 用于驱动LED器件的电流控制装置在输出强度低频脉宽调制（PWM）控制回路内使用开关模式电流控制回路。 这允许单独控制电流水平（用于准确的光波长输出）和光强度。 电流控制装置只需要一个开关来调节电流电平，而没有其他开关用于强度控制。 这允许较低的部件数量更高的可靠性和更低的系统成本。

公开(公告)号：US06650093B1

公开(公告)日：2003-11-18

申请号：US10162113

申请日：2002-06-03

申请人： Dave Baldwin ,  Sanmukh Patel ,  Ross E. Teggatz

发明人： Dave Baldwin ,  Sanmukh Patel ,  Ross E. Teggatz

IPC分类号： G05F1613

CPC分类号： G05F1/613

摘要： The regulator circuit with an auxiliary boundary regulator that provides enhanced transient response includes: an upper comparator 24 having a first input coupled to a feedback node and a second input coupled to a first reference voltage node V_HIGH; a lower comparator 26 having a first input coupled to the feedback node and a second input coupled to a second reference voltage node V_LOW; a first switching device 30 having a control node coupled to an output of the upper comparator 24; a second switching device 28 having a control node coupled to an output of the lower comparator 26; an inductor 36 having a first end coupled to the first and second switching devices 28 and 30, and a second end coupled to an output node Vout; and a feedback circuit 32 and 34 coupled between the output node Vout and the feedback node. This circuit provides a precise, quiet, linear regulator that provides a tightly regulated output with a fast regulator working in parallel to ensure that the output voltage stays within an acceptable boundary.

摘要翻译： 具有提供增强的瞬态响应的辅助边界调节器的调节器电路包括：具有耦合到反馈节点的第一输入和耦合到第一参考电压节点V_HIGH的第二输入的上比较器24; 下比较器26具有耦合到反馈节点的第一输入和耦合到第二参考电压节点V_LOW的第二输入; 具有耦合到上比较器24的输出的控制节点的第一开关装置30; 具有耦合到下比较器26的输出的控制节点的第二开关装置28; 电感器36，其具有耦合到第一和第二开关器件28和30的第一端，以及耦合到输出节点Vout的第二端; 以及耦合在输出节点Vout和反馈节点之间的反馈电路32和34。 该电路提供了一个精确，安静的线性稳压器，提供紧密调节的输出，并具有并联工作的快速调节器，以确保输出电压保持在可接受的边界内。