公开(公告)号：US20110286245A1

公开(公告)日：2011-11-24

申请号：US13005188

申请日：2011-01-12

申请人： XIAODONG ZHAN ,  WEIHONG QIU ,  FRED GREENFELD ,  ZHIXIANG LIANG

发明人： XIAODONG ZHAN ,  WEIHONG QIU ,  FRED GREENFELD ,  ZHIXIANG LIANG

IPC分类号： H02M3/28

CPC分类号： H02M3/33592 ,  Y02B70/1475

摘要： A DC/DC voltage converter includes a transformer having a primary side and a secondary side. Primary side circuitry is connected to the primary side and includes a first pair of switching transistors controlled responsive to first control signals from the primary side of the transformer and receiving an input voltage. Secondary side circuitry is connected to the secondary side and includes a second pair of switching transistors controlled responsive to second control signals from the secondary side of the transformer and providing an output voltage. Driver circuitry generates the second control signals responsive to drain and source voltages at each of the second pair of switching transistors and a first and second PWM control signals. Signal shaping circuitry provides the first and second PWM control signals responsive to a drain voltage of each of the second pair of switching transistors.

摘要翻译： DC / DC电压转换器包括具有初级侧和次级侧的变压器。 初级侧电路连接到初级侧，并且包括响应于来自变压器的初级侧的第一控制信号控制并接收输入电压的第一对开关晶体管。 次级侧电路连接到次级侧，并且包括响应于来自变压器的次级侧的第二控制信号控制并提供输出电压的第二对开关晶体管。 驱动器电路响应于第二对开关晶体管中的每一个处的漏极和源极电压以及第一和第二PWM控制信号产生第二控制信号。 信号整形电路提供响应于第二对开关晶体管中的每一个的漏极电压的第一和第二PWM控制信号。

公开(公告)号：US20100066319A1

公开(公告)日：2010-03-18

申请号：US12501204

申请日：2009-07-10

申请人： WEIHONG QIU ,  BOGDAN DUDUMAN ,  JASON LIN ,  MICHAEL JASON HOUSTON ,  DOUG MATTINGLY

发明人： WEIHONG QIU ,  BOGDAN DUDUMAN ,  JASON LIN ,  MICHAEL JASON HOUSTON ,  DOUG MATTINGLY

IPC分类号： G05F1/10

CPC分类号： H02M3/1584

摘要： A control circuit for generating a control signal to add phases to a multiphase voltage regulator. The control circuit includes an input for receiving an error correction voltage from an error amplifier of the multiphase voltage regulator and at least one output for providing a PWM control signal. Control circuitry generates at least one PWM control signal to add a phase to the multiphase voltage regulator responsive to a determination that the error correction voltage has exceeded a threshold level.

摘要翻译： 一种用于产生控制信号以将相位加到多相电压调节器的控制电路。 控制电路包括用于从多相电压调节器的误差放大器接收误差校正电压的输入端和用于提供PWM控制信号的至少一个输出端。 响应于确定误差校正电压已经超过阈值水平，控制电路产生至少一个PWM控制信号以向多相电压调节器添加相位。

公开(公告)号：US20110227550A1

公开(公告)日：2011-09-22

申请号：US12898971

申请日：2010-10-06

申请人： MICHAEL M. WALTERS ,  WEIHONG QIU

发明人： MICHAEL M. WALTERS ,  WEIHONG QIU

IPC分类号： G05F1/618

CPC分类号： H02M3/1582

摘要： A buck boost converter generates an output voltage responsive to an input voltage and at least one switching control signal in a buck mode of operation, a boost mode of operation and a buck-boost mode of operation. Control logic generates the at least one switching control signal responsive to the output voltage, a reference voltage, and a sensed voltage associated with an inductor current of the buck boost converter. The sensed voltage associated with the inductor current enables the control logic to generate the at least one switching control signal in a selected one of the buck mode of operation, the boost mode of operation and the buck-boost mode of operation.

摘要翻译： 降压升压转换器在降压操作模式，升压操作模式和降压 - 升压操作模式下，响应于输入电压和至少一个开关控制信号产生输出电压。 响应于输出电压，参考电压和与降压升压转换器的电感器电流相关联的感测电压，控制逻辑产生至少一个开关控制信号。 感测到的与电感器电流相关联的电压使得控制逻辑能够在降压操作模式，升压操作模式和降压 - 升压操作模式中选择的一个中产生至少一个开关控制信号。

公开(公告)号：US20100171645A1

公开(公告)日：2010-07-08

申请号：US12631998

申请日：2009-12-07

申请人： CHUN CHEUNG ,  WEIHONG QIU ,  ROBERT H. ISHAM ,  MIR MAHIN

发明人： CHUN CHEUNG ,  WEIHONG QIU ,  ROBERT H. ISHAM ,  MIR MAHIN

IPC分类号： H03M1/12

CPC分类号： H03M1/20 ,  G01R27/14

摘要： An integrated circuit including a single input pin for determining a value associated with a resistor divider. The circuit includes first circuitry for determining a resistor ratio of the resistor divider through the single input pin. A first register stores a first group of bits representing the resistor ratio. The first group of bits comprises the least significant bits of the value. Second circuitry determines an equivalent resistance of the resistor divider through the single input pin. A second register stores a second group of bits representing the equivalent resistance. The second group of bits comprises the most significant bits of the value associated with the resistor divider.

摘要翻译： 包括用于确定与电阻分压器相关联的值的单个输入引脚的集成电路。 该电路包括用于通过单个输入引脚确定电阻分压器的电阻比的第一电路。 第一寄存器存储表示电阻器比率的第一组位。 第一组比特包括该值的最低有效位。 第二个电路通过单个输入引脚确定电阻分压器的等效电阻。 第二寄存器存储表示等效电阻的第二组位。 第二组位包括与电阻分压器相关联的值的最高有效位。

公开(公告)号：US20100072964A1

公开(公告)日：2010-03-25

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。

公开(公告)号：US20100201405A1

公开(公告)日：2010-08-12

申请号：US12650772

申请日：2009-12-31

申请人： FAISAL AHMAD ,  WEIHONG QIU ,  NATTORN PONGRATANANUKUL

发明人： FAISAL AHMAD ,  WEIHONG QIU ,  NATTORN PONGRATANANUKUL

IPC分类号： H03K3/00 ,  H03L7/00

CPC分类号： H02M3/1584 ,  H02M3/33561 ,  H02M2003/1586

摘要： A drive control circuit generates switching drive signals for a single phase of a multiphase voltage regulator. A driver circuitry generates the switching drive signals for the voltage regulator responsive to a clock signal. A clock circuitry generates the clock signal responsive to a monitored external clock signal. A phase number detector determines a number of active phases in the multiphase voltage regulator in real time responsive to an indicator on a phase number input monitored by the phase detector.

摘要翻译： 驱动控制电路产生用于多相电压调节器的单相的开关驱动信号。 驱动器电路根据时钟信号产生用于电压调节器的开关驱动信号。 时钟电路响应于所监视的外部时钟信号而产生时钟信号。 相位检测器响应于由相位检测器监控的相位输入上的指示器实时地实时地确定多相电压调节器中的有效相位数。

公开(公告)号：US20120229113A1

公开(公告)日：2012-09-13

申请号：US13235586

申请日：2011-09-19

申请人： MICHAEL JASON HOUSTON ,  WEIHONG QIU ,  EMIL CHEN

发明人： MICHAEL JASON HOUSTON ,  WEIHONG QIU ,  EMIL CHEN

IPC分类号： G05F1/10

CPC分类号： H02M3/1588 ,  H02M2001/0025 ,  Y02B70/1466

摘要： A voltage regulator generates a regulated output voltage responsive to an input voltage and drive control signals. An error amplifier generates an error voltage signal responsive to the regulated output voltage and a reference voltage. A PWM modulator generates a PWM control signal responsive to the error voltage signal, a ramp voltage and an inverse of the reference voltage. Control circuitry within the PWM modulator maintains the error voltage signal applied to the PWM modulator at substantially a same DC voltage level over the reference voltage operating range and maintains the error voltage signal above a minimum value of the ramp voltage. Driver circuitry generates the drive control signals responsive to the PWM control signal.

摘要翻译： 电压调节器根据输入电压和驱动控制信号产生稳定的输出电压。 误差放大器响应于调节的输出电压和参考电压产生误差电压信号。 PWM调制器响应于误差电压信号，斜坡电压和参考电压的反相器产生PWM控制信号。 PWM调制器内的控制电路将在PWM调制器上施加的误差电压信号保持在与参考电压工作范围基本相同的直流电压电平，并将误差电压信号保持在斜坡电压的最小值以上。 驱动器电路根据PWM控制信号产生驱动控制信号。

公开(公告)号：US20110089915A1

公开(公告)日：2011-04-21

申请号：US12903683

申请日：2010-10-13

申请人： WEIHONG QIU ,  ZAKI MOUSSAOUI ,  JUN LIU

发明人： WEIHONG QIU ,  ZAKI MOUSSAOUI ,  JUN LIU

IPC分类号： G05F1/10

CPC分类号： G05F1/613 ,  H02M3/156 ,  H02M3/1582

摘要： An apparatus includes a buck boost converter for generating a regulated output voltage responsive to an input voltage. The buck boost converter includes an inductor, a first pair of switching transistors responsive to a first PWM signal and a second pair of switching transistors responsive to a second PWM signal. An error amplifier generates an error voltage responsive to the regulated output voltage and a reference voltage. A control circuit generates the first PWM signal and the second PWM signal responsive to the error voltage and a sensed current voltage responsive to a sensed current through the inductor. The control circuit controls switching of the first pair of switching transistors and the second pair of switching transistors using the first PWM signal and the second PWM signal responsive to the sensed current through the inductor and a plurality of offset error voltages based on the error voltage.

摘要翻译： 一种装置包括用于响应于输入电压产生稳定的输出电压的降压升压转换器。 降压升压转换器包括电感器，响应于第一PWM信号的第一对开关晶体管和响应于第二PWM信号的第二对开关晶体管。 误差放大器响应于调节的输出电压和参考电压产生误差电压。 控制电路响应于误差电压产生第一PWM信号和第二PWM信号，响应于通过电感器的感测电流产生感测的电流电压。 控制电路响应于通过电感器的感测电流和基于误差电压的多个偏移误差电压来控制第一对开关晶体管和第二对开关晶体管的开关，使用第一PWM信号和第二PWM信号。

公开(公告)号：US20090146635A1

公开(公告)日：2009-06-11

申请号：US12329147

申请日：2008-12-05

申请人： WEIHONG QIU ,  CHRIS T. BURKET ,  GUSTAVO JAMES MEHAS

发明人： WEIHONG QIU ,  CHRIS T. BURKET ,  GUSTAVO JAMES MEHAS

IPC分类号： G05F1/00

CPC分类号： H02M3/156 ,  H02M2001/0009

摘要： The DC/DC voltage converter comprises at least one switching transistor. An inductor is connected to the at least one switching transistor. A pulse width modulation circuit generates control signals to at least one switching transistor responsive to a current control signal. A current sensor connected in parallel with the inductor senses current passing through the inductor. The sensor comprises a resistor and an NTC capacitor connected in series with the resistor. Circuitry for monitoring the voltage across the NTC capacitor generates the current control signal responsive to the monitored voltage.

摘要翻译： DC / DC电压转换器包括至少一个开关晶体管。 电感器连接到至少一个开关晶体管。 脉冲宽度调制电路根据电流控制信号向至少一个开关晶体管产生控制信号。 与电感器并联连接的电流传感器感测通过电感器的电流。 传感器包括与电阻器串联连接的电阻器和NTC电容器。 用于监测NTC电容器两端的电压的电路根据监测的电压产生电流控制信号。