公开(公告)号：US07453251B1

公开(公告)日：2008-11-18

申请号：US11333475

申请日：2006-01-17

申请人： Gustavo J. Mehas ,  James W. Leith ,  Shying D. Chen

发明人： Gustavo J. Mehas ,  James W. Leith ,  Shying D. Chen

IPC分类号： G05F1/00

CPC分类号： H02M3/156 ,  H02M2001/0022 ,  Y10S323/901

摘要： A control circuit for a PWM switching power regulator including an error amplifier and an amplifier filter circuit. The error amplifier has a first input receiving a reference signal, a second input receiving an output sense signal, and an output providing a compensation signal used to control PWM switching. The amplifier filter circuit has an input receiving a ratio-metric tracking signal and an output providing the reference signal to the input of the error amplifier. The control circuit may include a resistive voltage divider for providing the tracking signal. The amplifier filter circuit may be implemented as a transconductance amplifier having an input receiving the tracking signal and an output coupled to a capacitor. The transconductance amplifier may have a relatively small current drive capacity and its output may have a relatively slow and weak response to changes of the tracking signal.

摘要翻译： 一种用于包括误差放大器和放大器滤波器电路的PWM开关功率调节器的控制电路。 误差放大器具有接收参考信号的第一输入端，接收输出检测信号的第二输入端和提供用于控制PWM切换的补偿信号的输出。 放大器滤波器电路具有接收比率度量跟踪信号的输入端和向误差放大器输入端提供参考信号的输出。 控制电路可以包括用于提供跟踪信号的电阻分压器。 放大器滤波器电路可以被实现为具有接收跟踪信号的输入和耦合到电容器的输出的跨导放大器。 跨导放大器可以具有相对小的电流驱动能力，并且其输出可能对跟踪信号的变化具有相对较慢和弱的响应。

公开(公告)号：US06975163B2

公开(公告)日：2005-12-13

申请号：US10813254

申请日：2004-03-30

申请人： Gustavo J. Mehas ,  James W. Leith ,  Brandon D. Day

发明人： Gustavo J. Mehas ,  James W. Leith ,  Brandon D. Day

IPC分类号： G01R31/30 ,  G05F1/10 ,  G11C11/34 ,  H02M3/04 ,  H03F3/45

CPC分类号： G01R31/3004 ,  G11C29/12005 ,  H03F3/45174 ,  H03F3/45475 ,  H03F3/45928

摘要： An IC including a margining control amplifier circuit, first and second offset pins, a margining control pin, select logic, and a mirror amplifier circuit. The margining control amplifier circuit drives current at an output to control voltage at an input based on a reference voltage. The first and second offset pins are provided to couple an external margining voltage divider. The margining control pin has at least two states including an up state and a down state. The select logic selectively switches the output of the margining control amplifier circuit between the first and second offset pins and selectively switches the input of the margining control amplifier circuit between the second and first offset pins based on a state of the margining control pin. The mirror amplifier circuit mirrors voltage across the first and second offset pins across a first margining resistor.

摘要翻译： IC包括边缘化控制放大器电路，第一和第二偏移引脚，边缘控制引脚，选择逻辑和反射镜放大器电路。 边缘控制放大器电路驱动输出端的电流，以基于参考电压来控制输入端的电压。 提供第一和第二偏移引脚以耦合外部裕度分压器。 边缘控制销具有包括向上状态和向下状态的至少两个状态。 选择逻辑选择性地切换边界控制放大器电路在第一和第二偏移引脚之间的输出，并且基于边缘控制引脚的状态选择性地切换边缘控制放大器电路在第二和第一偏移引脚之间的输入。 反射镜放大器电路跨越第一边缘电阻器反射穿过第一和第二偏移引脚的电压。

公开(公告)号：US07038514B2

公开(公告)日：2006-05-02

申请号：US10775560

申请日：2004-02-10

申请人： James W. Leith ,  Gustavo J. Mehas

发明人： James W. Leith ,  Gustavo J. Mehas

IPC分类号： G05F1/46 ,  H03M3/156 ,  H03K3/0233

CPC分类号： H02M1/36 ,  H02M3/156 ,  Y10S323/901

摘要： A startup circuit for a power converter including an amplifier circuit, a comparator, and startup logic. The power converter includes an error amplifier that compares an output sense signal with a startup reference signal and that provides a compensation signal. The amplifier circuit charges the startup reference signal to a predetermined reference level based on a second reference signal in response to a start signal. The comparator determines when the compensation signal reaches a predetermined ramp level and asserts a startup complete signal indicative thereof. The startup logic provides the start signal and provides an output enable signal in response to the startup complete signal. The output enable signal enables output switching to initiate normal regulation operation of the output voltage. In one embodiment, the predetermined ramp level is approximately the center voltage of a sawtooth regulation waveform used for PWM modulation.

摘要翻译： 一种用于功率转换器的启动电路，包括放大器电路，比较器和启动逻辑。 功率转换器包括误差放大器，其将输出感测信号与启动参考信号进行比较，并提供补偿信号。 放大器电路响应于起始信号，基于第二参考信号将启动参考信号充电到预定参考电平。 比较器确定补偿信号何时达到预定的斜坡电平并且断言指示其的启动完成信号。 启动逻辑提供启动信号，并响应于启动完成信号提供输出使能信号。 输出使能信号使输出开关能够启动输出电压的正常调节操作。 在一个实施例中，预定斜坡电平近似为用于PWM调制的锯齿调节波形的中心电压。

公开(公告)号：US07612546B2

公开(公告)日：2009-11-03

申请号：US10919152

申请日：2004-08-16

申请人： James W. Leith ,  Gustavo J. Mehas ,  Bogdan Duduman

发明人： James W. Leith ,  Gustavo J. Mehas ,  Bogdan Duduman

IPC分类号： G05F1/40

CPC分类号： G05F1/40

摘要： A voltage regulator includes a voltage source for providing an input voltage. The regulator includes circuitry responsive to the input voltage for generating a regulated output voltage. The circuitry enables selection of one of internal linear voltage regulation or external linear voltage regulation for generating the regulated output voltage.

摘要翻译： 电压调节器包括用于提供输入电压的电压源。 调节器包括响应于输入电压以产生调节输出电压的电路。 该电路可选择内部线性电压调节或外部线性电压调节，以产生稳压输出电压。

公开(公告)号：US07256623B2

公开(公告)日：2007-08-14

申请号：US10925744

申请日：2004-08-25

申请人： Brandon D. Day ,  James W. Leith ,  Gustavo J. Mehas

发明人： Brandon D. Day ,  James W. Leith ,  Gustavo J. Mehas

IPC分类号： H03C3/00

CPC分类号： H03K4/502

摘要： A frequency programmable feed forward oscillator and triangular wave generator is disclosed having a first input for receiving an input voltage and a second input for receiving an input current. Circuitry within the device responsive to the input voltage scales the amplitude of a triangle wave form according to the provided input voltage and provides the scaled output voltage at a first output. In conjunction, the circuitry also generates a scaled PWM frequency responsive to the provided input current and provides this at a second output.

摘要翻译： 公开了一种频率可编程前馈振荡器和三角波发生器，其具有用于接收输入电压的第一输入端和用于接收输入电流的第二输入端。 根据输入电压，器件内的电路根据提供的输入电压对三角形波形的幅度进行缩放，并在第一输出端提供缩放的输出电压。 结合起来，电路还响应于所提供的输入电流产生定标的PWM频率并将其提供在第二输出端。

公开(公告)号：US07227731B2

公开(公告)日：2007-06-05

申请号：US10875697

申请日：2004-06-24

申请人： James W. Leith ,  Gustavo J. Mehas ,  Brandon D. Day

发明人： James W. Leith ,  Gustavo J. Mehas ,  Brandon D. Day

IPC分类号： H02H7/00

CPC分类号： H02M1/32 ,  H02H7/1213

摘要： Apparatus for providing over-current protection in a power converter device includes a first circuit for providing high-side sinking over-current protection for the power converter device responsive to a phase signal and a high-side over-current signal of the power converter device. A second circuit provides low-side sinking over-current protection for the power converter device responsive to the phase signal and the low-side over-current signal of the power converter device. Finally, a third circuit provides low-side sourcing over-current protection responsive to the phase signal, the low-side over-current protection signal and a power ground signal of the power converter device.

摘要翻译： 用于在功率转换器装置中提供过电流保护的装置包括：第一电路，用于响应于功率转换器装置的相位信号和高侧过电流信号，为功率转换器装置提供高侧吸收过电流保护 。 第二电路响应于功率转换器装置的相位信号和低侧过电流信号，为功率转换器装置提供低边吸收过电流保护。 最后，第三电路响应于相位信号，低侧过流保护信号和功率转换器装置的电源接地信号，提供低端采样过电流保护。

公开(公告)号：US07088600B2

公开(公告)日：2006-08-08

申请号：US10915906

申请日：2004-08-11

申请人： Gustavo J. Mehas ,  James W. Leith ,  Brandon D. Day

发明人： Gustavo J. Mehas ,  James W. Leith ,  Brandon D. Day

IPC分类号： H02M1/00

CPC分类号： H02M1/36 ,  Y10S323/901

摘要： An apparatus for reducing surge currents during startup of a voltage regulator is disclosed that includes circuitry for maintaining a voltage at an FB pin of the voltage regulator substantially equivalent to an output voltage of the voltage regulator.

摘要翻译： 公开了一种用于在电压调节器启动期间减小浪涌电流的装置，其包括用于将电压调节器的FB引脚上的电压维持在基本上等于电压调节器的输出电压的电路。

公开(公告)号：US07034586B2

公开(公告)日：2006-04-25

申请号：US10865373

申请日：2004-06-10

申请人： Gustavo J. Mehas ,  James W. Leith ,  Brandon D. Day

发明人： Gustavo J. Mehas ,  James W. Leith ,  Brandon D. Day

IPC分类号： H03L7/00

CPC分类号： H02M1/36 ,  Y10S323/901

摘要： A method of starting a DC—DC converter into a precharged output voltage including generating a reference voltage having a linear relationship with the output voltage such that the reference voltage ranges between a minimum and maximum voltage level of a PWM triangular waveform as the output voltage ranges between zero and an input voltage level, and enabling output switching of the DC—DC converter when the reference voltage is approximately equal to a compensation signal generated by an error amplifier comparing the reference voltage with a feedback signal representative of the output voltage. Generating a reference voltage may include applying a first current based on the input voltage through two resistors to develop the minimum and maximum voltage levels, applying the first current in one direction through a third resistor, and applying a second current based on the output voltage through the third resistor in the opposite direction.

摘要翻译： 一种将DC-DC转换器启动为预充电输出电压的方法，包括产生与输出电压具有线性关系的参考电压，使得参考电压在PWM三角波形的最小和最大电压电平之间的范围内，作为输出电压范围 在零和输入电压电平之间，并且当参考电压近似等于由误差放大器产生的补偿信号时，DC-DC转换器的输出切换，其将参考电压与表示输出电压的反馈信号进行比较。 产生参考电压可以包括基于输入电压施加通过两个电阻器的第一电流以产生最小和最大电压电平，通过第三电阻器将一个电流施加到一个方向，并且基于输出电压通过施加第二电流 第三个电阻器在相反的方向。

公开(公告)号：US20110221414A1

公开(公告)日：2011-09-15

申请号：US12723239

申请日：2010-03-12

申请人： John M. Pigott ,  Gustavo J. Mehas ,  Gerrit van der Horn ,  Richard Willem Visee

发明人： John M. Pigott ,  Gustavo J. Mehas ,  Gerrit van der Horn ,  Richard Willem Visee

IPC分类号： G05F1/46

CPC分类号： H02M3/1588 ,  H02M1/38 ,  H02M2001/0009 ,  Y02B70/1466

摘要： A DC to DC converter has first and second transistor coupled at a first node and coupled between first and second power supply terminals. An inductor has a first terminal coupled to the first node and a second terminal coupled to an output terminal for receiving a variable load. Transistor drive circuitry controls conduction of the first and second transistor in a non-overlapping conduction operation. A duty cycle controller controls a duty cycle for the first transistor and the second transistor. Control circuitry determines a mode of operation by monitoring cycles of operation and detecting a predetermined pattern of cycles in which inductor current becomes negative. A first mode of operation permits both the first transistor and the second transistor to alternately conduct and a second mode of operation does not permit the second transistor to conduct during each cycle when the inductor current is reduced to substantially zero.

摘要翻译： DC到DC转换器具有耦合在第一节点处并耦合在第一和第二电源端子之间的第一和第二晶体管。 电感器具有耦合到第一节点的第一端子和耦合到输出端子的用于接收可变负载的第二端子。 晶体管驱动电路在非重叠导通操作中控制第一和第二晶体管的导通。 占空比控制器控制第一晶体管和第二晶体管的占空比。 控制电路通过监视操作周期并检测电感器电流变为负的周期的预定模式来确定操作模式。 第一操作模式允许第一晶体管和第二晶体管交替导通，并且当电感器电流减小到基本为零时，第二操作模式不允许第二晶体管在每个周期期间导通。

公开(公告)号：US20110156787A1

公开(公告)日：2011-06-30

申请号：US13044251

申请日：2011-03-09

申请人： Gustavo J. Mehas ,  Chun Cheung ,  Brandon D. Day

发明人： Gustavo J. Mehas ,  Chun Cheung ,  Brandon D. Day

IPC分类号： H03K3/00

CPC分类号： H02M3/1588 ,  H02M2001/0012 ,  H02M2001/0038 ,  Y02B70/1466

摘要： An apparatus for providing programmable hysteresis control using an enable pin of a device is disclosed. An enable pin is configured to receive an input signal to enable and disable an associated device responsive to the input signal. A current sink is attached to the enable pin and is responsive to circuitry that disables the current sink responsive to application of the input signal at a first voltage level and enables the current sink responsive to application of the input signal at a second voltage level.

摘要翻译： 公开了一种使用设备的使能引脚提供可编程滞回控制的装置。 启用引脚被配置为接收输入信号以响应于输入信号来启用和禁用相关联的设备。 电流吸收器连接到使能引脚，并且响应于电路，其响应于在第一电压电平处施加输入信号而禁用电流宿，并且能够使电流宿响应于第二电压电平上的输入信号的应用。