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31. 发明授权

US08575908B2 Voltage regulator including constant loop gain control 有权
标题翻译：电压调节器包括恒定环路增益控制
公开(公告)号：US08575908B2
公开(公告)日：2013-11-05
申请号：US12539035
申请日：2009-08-11
申请人： Weihong Qiu , Shangyang Xiao , Nattorn Pongratanankul
发明人： Weihong Qiu , Shangyang Xiao , Nattorn Pongratanankul
IPC分类号： G05F1/10
CPC分类号： H02M3/156 , H02M2001/0025
摘要： A voltage regulation circuit includes a power stage for generating a regulated output voltage responsive to an input voltage and at least one PWM signal. A voltage divider circuit is connected to the output of the power stage and generates a feedback voltage. First circuitry generates the at least one PWM signal responsive to a voltage error signal, a filtered output voltage signal and a ramp voltage signal. The filtered output voltage is used for substantially removing loop gain change caused by the voltage divider circuit. A voltage compensation circuit generates the voltage error signal responsive to a feedback voltage and a reference voltage.
摘要翻译：电压调节电路包括用于响应于输入电压和至少一个PWM信号产生调节的输出电压的功率级。分压器电路连接到功率级的输出端并产生反馈电压。第一电路响应于电压误差信号，滤波后的输出电压信号和斜坡电压信号，产生至少一个PWM信号。滤波后的输出电压用于基本上消除由分压电路引起的环路增益变化。电压补偿电路根据反馈电压和参考电压产生电压误差信号。

32. 发明申请

US20130207555A1 LED DRIVER SYSTEM WITH DIMMER DETECTION 有权
标题翻译：带驱动器检测的LED驱动器系统
公开(公告)号：US20130207555A1
公开(公告)日：2013-08-15
申请号：US13536892
申请日：2012-06-28
申请人： Weihong Qiu , Rakesh Anumula , Fred F. Greenfeld
发明人： Weihong Qiu , Rakesh Anumula , Fred F. Greenfeld
IPC分类号： H05B37/00 , H02P27/05 , H02J7/00
CPC分类号： H05B33/0815
摘要： An LED driver system including an input receiving a rectified AC conductive angle modulated voltage on a rectified node, a converter, a low-pass filter, and AC detector, and a driver network. The converter is to the rectified node and includes a power switching device coupled to a switching node, in which the power switching device is controlled to convert the rectified AC conductive angle modulated voltage to an output voltage and output current. The low-pass filter is configured to filter voltage of the switching node to provide a filtered voltage. The AC detector receives the filtered voltage and provides a current sense signal indicative thereof. The driver network controls duty cycle of the power switching device based on the current sense signal.
摘要翻译：一种LED驱动器系统，包括在整流节点上接收经整流的AC导电角度调制电压的输入，转换器，低通滤波器和AC检测器以及驱动器网络。转换器是整流节点，并且包括耦合到开关节点的功率开关器件，其中控制功率开关器件将整流的AC导电角度调制电压转换为输出电压和输出电流。低通滤波器被配置为对开关节点的电压进行滤波以提供滤波电压。 AC检测器接收经过滤波的电压并提供指示其的电流检测信号。驱动器网络基于电流检测信号来控制功率开关器件的占空比。

33. 发明申请

US20130141070A1 CONTROL SYSTEM AND METHOD FOR SHARED INDUCTOR REGULATOR 审中-公开
标题翻译：共享电感器调节器的控制系统和方法
公开(公告)号：US20130141070A1
公开(公告)日：2013-06-06
申请号：US13427224
申请日：2012-03-22
申请人： Andrew D. Goessling , Weihong Qiu , Zaki Moussaoui
发明人： Andrew D. Goessling , Weihong Qiu , Zaki Moussaoui
IPC分类号： G05F1/10
CPC分类号： H02M3/156 , H02J7/0072 , H02J7/022 , H02M1/10 , H02M3/1582
摘要： A control system and method for a shared inductor regulator. The regulator includes an inductor and multiple switches to selectively couple the inductor to output, reference and charge nodes. The charge node may be coupled to a battery. An input switch may be included to selectively couple the inductor to a source node. A controller controls the switches to regulate output voltage, charge current, and a source voltage when provided. The inductor current is sensed and used to regulate the output voltage, and to regulate either the charge current or the input voltage. When an external source provides sufficient power, the charging current is regulated. When the source reaches a maximum power set point, the input voltage is maintained at a minimum level. When the source provides insufficient power, the battery is used to add power or to provide sole power.
摘要翻译：一种用于共享电感调节器的控制系统和方法。调节器包括电感器和多个开关，用于选择性地将电感器耦合到输出，参考和充电节点。充电节点可以耦合到电池。可以包括输入开关以选择性地将电感器耦合到源节点。控制器控制开关调节输出电压，充电电流和源极电压。电感电流被感测并用于调节输出电压，并调节充电电流或输入电压。当外部源提供足够的功率时，充电电流被调节。当源达到最大功率设定点时，输入电压保持在最小电平。当电源供电不足时，电池用于增加电力或提供唯一的电力。

34. 发明授权

US08232782B2 System and method for equalizing the small signal response of variable phase voltage regulators 有权
标题翻译：用于均衡可变相电压调节器的小信号响应的系统和方法
公开(公告)号：US08232782B2
公开(公告)日：2012-07-31
申请号：US12761914
申请日：2010-04-16
申请人： M. Jason Houston , Bogdan M. Duduman , Weihong Qiu
发明人： M. Jason Houston , Bogdan M. Duduman , Weihong Qiu
IPC分类号： G05F1/575 , G05F1/656
CPC分类号： H04L25/0272 , H02M3/1584 , H04L25/4902
摘要： A control circuit for a variable phase voltage regulator comprises an error amplifier to generate a difference signal based on a difference between a reference voltage and a signal representative of a voltage at an output node of the variable phase voltage regulator. The control circuit also comprises a variable phase compensator to amplify the difference signal to produce a modified difference signal to compensate for effects of varying the number of active phases in the variable phase voltage regulator, wherein the amplification is proportional to a ratio of total number of phases in the variable phase voltage regulator to number of active phases in the variable phase voltage regulator.
摘要翻译：用于可变相位调压器的控制电路包括误差放大器，用于基于参考电压和表示可变相位电压调节器的输出节点处的电压的信号之间的差产生差分信号。控制电路还包括可变相位补偿器，用于放大差分信号以产生修改的差分信号，以补偿在可变相电压调节器中改变有效相数量的影响，其中放大与总数可变相电压调节器中的相位可变相电压调节器中的有效相数。

35. 发明授权

US08188721B2 Active pulse positioning modulator 有权
标题翻译：有源脉冲定位调制器
公开(公告)号：US08188721B2
公开(公告)日：2012-05-29
申请号：US12492397
申请日：2009-06-26
申请人： Robert H. Isham , Weihong Qiu
发明人： Robert H. Isham , Weihong Qiu
IPC分类号： G05F1/40
CPC分类号： H03K7/08 , H02M3/156 , H02M3/1584 , H03K7/04
摘要： An adaptive pulse positioning modulator including a sense circuit which provides a compensation signal indicative of output voltage error, a filter circuit having an input receiving the compensation signal and an output providing an adjust signal, a leading ramp circuit which provides a repetitive first leading edge ramp signal having a slope which is adjusted by the adjust signal, a comparator circuit which provides a first start trigger signal when the first leading edge ramp signal reaches the compensation signal and a first end trigger signal when a first trailing edge ramp signal reaches the compensation signal, a trailing ramp circuit which initiates ramping of the first trailing edge ramp signal when the first start trigger signal is provided, and a pulse control logic which asserts pulses on a PWM signal based on the trigger signals.
摘要翻译：一种自适应脉冲定位调制器，包括提供表示输出电压误差的补偿信号的检测电路，具有接收补偿信号的输入端和提供调整信号的输出端的滤波器电路，提供重复的第一前沿斜坡信号具有通过调节信号调整的斜率;比较电路，当第一前沿斜坡信号达到补偿信号时提供第一起始触发信号，当第一后沿斜坡信号达到补偿信号时提供第一起始触发信号，当提供第一启动触发信号时启动第一后沿斜坡信号的斜坡的拖尾斜坡电路，以及基于触发信号在PWM信号上断言脉冲的脉冲控制逻辑。

36. 发明授权

US08080987B1 Method and apparatus for efficient transitioning between different operating modes of a regulator 有权
标题翻译：用于在调节器的不同操作模式之间有效转换的方法和装置
公开(公告)号：US08080987B1
公开(公告)日：2011-12-20
申请号：US11869070
申请日：2007-10-09
申请人： Weihong Qiu , Kun Xing
发明人： Weihong Qiu , Kun Xing
IPC分类号： G05F1/10 , G05F1/12
CPC分类号： H02M3/156 , H02M2001/0025
摘要： A modulator circuit for a switching regulator including first and second ramp generators, a comparator circuit and a reset circuit. The switching regulator provides a compensation voltage indicative of output voltage error. The ramp generators generate leading- and trailing-edge ramp voltages which are compared to the compensation voltage for determining pulses on a pulse modulation signal. The reset circuit prevents the leading-edge ramp voltage from resetting if the leading-edge ramp voltage has not reached the compensation voltage while ramping. The reset circuit further clamps the leading-edge ramp voltage until the pulse modulation signal is asserted again. In a multiphase configuration, each leading-edge ramp voltage is suspended if any leading-edge ramp voltage is clamped. An offset voltage may be added to the compensation, leading-edge, or trailing-edge voltages when a mode select signal indicates a reduced load condition. The offset voltage may be adjusted based on various operating conditions.
摘要翻译：一种用于开关调节器的调制器电路，包括第一和第二斜坡发生器，比较器电路和复位电路。开关稳压器提供表示输出电压误差的补偿电压。斜坡发生器产生与用于确定脉冲调制信号上的脉冲的补偿电压相比较的前沿和后沿斜坡电压。如果前沿斜坡电压在斜坡上没有达到补偿电压，则复位电路可以防止前沿斜坡电压复位。复位电路进一步钳位前沿斜坡电压，直至再次断言脉冲调制信号。在多相配置中，如果任何前沿斜坡电压被钳位，则每个前沿斜坡电压都将被暂停。当模式选择信号指示减小的负载条件时，偏移电压可以被添加到补偿，前沿或后沿电压。可以基于各种操作条件来调整偏移电压。

37. 发明授权

US07932704B1 System and method of providing control pulses to control operation of a converter with high frequency repetitive load transients 有权
标题翻译：提供控制脉冲以控制具有高频重复负载瞬变的转换器的操作的系统和方法
公开(公告)号：US07932704B1
公开(公告)日：2011-04-26
申请号：US12359569
申请日：2009-01-26
申请人： Robert H. Isham , Weihong Qiu
发明人： Robert H. Isham , Weihong Qiu
IPC分类号： G05F1/10 , G05F1/40
CPC分类号： H02M3/1584 , H02M2001/0025
摘要： A modulator for providing control pulses on a pulse control signal for controlling operation of a DC-DC converter is disclosed which includes a comparator, pulse control logic, a memory circuit and a switch circuit. The comparator compares a timing waveform with a compensation signal and provides a comparison signal with preliminary pulses. The pulse logic circuit receives the comparison signal and provides normal pulses on a normal pulse signal. The pulse logic circuit selects only those preliminary pulses which are provided during a permissible time window of each period of the periodic timing waveform. The memory circuit provides a pulse indication whenever a normal pulse does not occur on the pulse signal during any switching period. The switch circuit selects between the normal pulse signal and the comparison signal based on the pulse indication for providing the control pulses.
摘要翻译：公开了一种用于在控制DC-DC转换器的操作的脉冲控制信号上提供控制脉冲的调制器，其包括比较器，脉冲控制逻辑，存储器电路和开关电路。比较器将定时波形与补偿信号进行比较，并将比较信号与初步脉冲进行比较。脉冲逻辑电路接收比较信号并在正常脉冲信号上提供正常脉冲。脉冲逻辑电路仅选择在周期性定时波形的每个周期的允许时间窗口期间提供的那些初步脉冲。每当在任何切换周期期间脉冲信号上不发生正常脉冲时，存储电路提供脉冲指示。开关电路基于用于提供控制脉冲的脉冲指示，在正常脉冲信号和比较信号之间进行选择。

38. 发明授权

US07868600B2 Adaptive PWM pulse positioning for fast transient response 有权
标题翻译：自适应PWM脉冲定位，用于快速瞬态响应
公开(公告)号：US07868600B2
公开(公告)日：2011-01-11
申请号：US12273441
申请日：2008-11-18
申请人： Weihong Qiu , Robert H. Isham , Zhixiang Liang , Thomas Szepesi
发明人： Weihong Qiu , Robert H. Isham , Zhixiang Liang , Thomas Szepesi
IPC分类号： G05F1/56
CPC分类号： H02M3/33507 , H02M3/156
摘要： An adaptive pulse positioning system for a voltage converter including an adjustable ramp generator, a pulse generator circuit, and a sense and adjust circuit. The adjustable ramp generator has an adjust input and provides a periodic ramp voltage having an adjustable magnitude based on an adjust signal provided to the adjust input. The pulse generator circuit receives the ramp voltage and generates a pulse signal with control pulses for controlling the output voltage of the voltage controller based on the ramp voltage. The sense and adjust circuit senses an output load transient and provides the adjust signal to the adjust input of the ramp generator to adaptively shift the pulse signal in time in response to the output load transient without adding pulses to the pulse signal.
摘要翻译：一种用于电压转换器的自适应脉冲定位系统，包括可调斜率发生器，脉冲发生器电路以及感测和调节电路。可调斜坡发生器具有调节输入，并且基于提供给调节输入的调整信号提供具有可调幅度的周期性斜坡电压。脉冲发生器电路接收斜坡电压，并产生具有控制脉冲的脉冲信号，用于根据斜坡电压控制电压控制器的输出电压。感测和调节电路检测输出负载瞬变，并将调整信号提供给斜坡发生器的调整输入端，以响应于输出负载瞬变自适应地移动脉冲信号，而不向脉冲信号添加脉冲。

39. 发明申请

US20090072807A1 ADAPTIVE PWM PULSE POSITIONING FOR FAST TRANSIENT RESPONSE 有权
标题翻译：自适应PWM脉冲定位快速瞬态响应
公开(公告)号：US20090072807A1
公开(公告)日：2009-03-19
申请号：US12273441
申请日：2008-11-18
申请人： Weihong Qiu , Robert H. Isham , Zhixiang Liang , Thomas Szepesi
发明人： Weihong Qiu , Robert H. Isham , Zhixiang Liang , Thomas Szepesi
IPC分类号： G05F1/565
CPC分类号： H02M3/33507 , H02M3/156
摘要： An adaptive pulse positioning system for a voltage converter including an adjustable ramp generator, a pulse generator circuit, and a sense and adjust circuit. The adjustable ramp generator has an adjust input and provides a periodic ramp voltage having an adjustable magnitude based on an adjust signal provided to the adjust input. The pulse generator circuit receives the ramp voltage and generates a pulse signal with control pulses for controlling the output voltage of the voltage controller based on the ramp voltage. The sense and adjust circuit senses an output load transient and provides the adjust signal to the adjust input of the ramp generator to adaptively shift the pulse signal in time in response to the output load transient without adding pulses to the pulse signal.
摘要翻译：一种用于电压转换器的自适应脉冲定位系统，包括可调斜率发生器，脉冲发生器电路以及感测和调节电路。可调斜坡发生器具有调节输入，并且基于提供给调节输入的调整信号提供具有可调幅度的周期性斜坡电压。脉冲发生器电路接收斜坡电压，并产生具有控制脉冲的脉冲信号，用于根据斜坡电压控制电压控制器的输出电压。感测和调节电路检测输出负载瞬变，并将调整信号提供给斜坡发生器的调整输入端，以响应于输出负载瞬变自适应地移动脉冲信号，而不向脉冲信号添加脉冲。

40. 发明授权

US07489121B2 Compensation offset adjustment scheme for fast reference voltage transitioning 有权
标题翻译：用于快速参考电压转换的补偿偏移调整方案
公开(公告)号：US07489121B2
公开(公告)日：2009-02-10
申请号：US11395909
申请日：2006-03-31
申请人： Weihong Qiu , Robert H. Isham , Zhixiang Liang
发明人： Weihong Qiu , Robert H. Isham , Zhixiang Liang
IPC分类号： G05F1/40
CPC分类号： H02M3/156
摘要： A PWM control circuit for a voltage regulator including a compensation network, a ramp generator providing a ramp voltage, an offset adjust circuit and a comparator circuit. The compensation network senses the output voltage, receives a reference voltage, and outputs a compensation voltage. The offset adjust circuit adjusts a selected one of the ramp voltage and the compensation voltage based on the reference voltage. The comparator circuit compares the compensation voltage with the ramp voltage and provides a PWM signal for controlling the output voltage. The offset adjust circuit may generate an offset voltage based on the reference voltage and a gain G of the voltage regulator. The offset adjust circuit may subtract the offset voltage from either the ramp voltage or the compensation voltage to provide an adjusted voltage to the comparator circuit.
摘要翻译：一种用于包括补偿网络的电压调节器的PWM控制电路，提供斜坡电压的斜坡发生器，偏移调整电路和比较器电路。补偿网络感测输出电压，接收参考电压，并输出补偿电压。偏移调整电路根据参考电压调整斜坡电压和补偿电压中选择的一个。比较器电路将补偿电压与斜坡电压进行比较，并提供用于控制输出电压的PWM信号。偏移调整电路可以基于参考电压和电压调节器的增益G产生偏移电压。偏移调整电路可以从斜坡电压或补偿电压中减去偏移电压，以向比较器电路提供经调整的电压。

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