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1. 发明申请

US20070075694A1 Controlling a voltage regulator 有权
标题翻译：控制电压调节器
公开(公告)号：US20070075694A1
公开(公告)日：2007-04-05
申请号：US11241334
申请日：2005-09-30
申请人： Xiaoyu Xi , Shyam Somayajula
发明人： Xiaoyu Xi , Shyam Somayajula
IPC分类号： G05F1/00
CPC分类号： H02M3/156
摘要： A technique includes energizing a storage element of a voltage regulator in response to the detection of an output voltage of the voltage regulator falling below a threshold level. The technique includes halting the energization of the storage element in response to the detection of a current in the storage element reaching a predetermined threshold.
摘要翻译：一种技术包括响应于电压调节器的输出电压的检测下降到阈值水平以下来激励电压调节器的存储元件。该技术包括响应于存储元件中的电流的检测达到预定阈值，停止存储元件的通电。

2. 发明申请

US20070075698A1 Management of regulator-induced switching noise for sampled systems 有权
标题翻译：对采样系统调节器引起的开关噪声的管理
公开(公告)号：US20070075698A1
公开(公告)日：2007-04-05
申请号：US11240745
申请日：2005-09-30
申请人： Xiaoyu Xi , Shyam Somayajula
发明人： Xiaoyu Xi , Shyam Somayajula
IPC分类号： G05F1/00
CPC分类号： H02M1/44 , G06F1/26
摘要： A system includes a sampler to sample an input voltage and a switching regulator. The switching regulator is adapted to regulate a switching operation of the regulator in response to the sampling by the sampler.
摘要翻译：系统包括用于对输入电压进行采样的采样器和开关调节器。开关调节器适于响应于采样器的采样来调节调节器的开关操作。

3. 发明申请

US20130241511A1 SWITCHING POWER SUPPLY WITH FIXED OFF TIME MODE AND CONTROL METHOD THEREOF 有权
标题翻译：用固定关闭时间模式切换电源及其控制方法
公开(公告)号：US20130241511A1
公开(公告)日：2013-09-19
申请号：US13431199
申请日：2012-03-27
申请人： Xiaoyu Xi
发明人： Xiaoyu Xi
IPC分类号： G05F1/10
CPC分类号： H02M3/158 , H02M2001/0025
摘要： The present invention provides a controller used in a switching power supply. The controller comprises an oscillator, a first comparison circuit and a logic circuit. The oscillator generates a slope compensation signal and a clock signal. The first comparison circuit generates a first comparison signal in accordance with a current sensing signal, a feedback signal and the slope compensation signal. The logic circuit generates a control signal to control the main switch based on the clock signal and the first compensation signal. If the on time of the main switch is longer than the predetermined time period, the slope compensation signal will have a first slew rate during the predetermined time period and a second slew rate out of the predetermined time period, wherein the second slew rate is smaller than the first slew rate.
摘要翻译：本发明提供一种用于开关电源的控制器。控制器包括振荡器，第一比较电路和逻辑电路。振荡器产生斜率补偿信号和时钟信号。第一比较电路根据电流感测信号，反馈信号和斜率补偿信号产生第一比较信号。逻辑电路根据时钟信号和第一补偿信号产生控制信号以控制主开关。如果主开关的导通时间长于预定时间段，则斜率补偿信号将在预定时间段内具有第一压摆率，并且在预定时间段内将具有第二压摆率，其中第二转换速率较小比第一个压摆率。

4. 发明申请

US20130173980A1 SWITCHING CONVERTER WITH PULSE SKIPPING MODE AND CONTROL METHOD THEREOF 有权
标题翻译：具有脉冲跳闸模式的开关转换器及其控制方法
公开(公告)号：US20130173980A1
公开(公告)日：2013-07-04
申请号：US13413906
申请日：2012-03-07
申请人： Xiaoyu Xi
发明人： Xiaoyu Xi
IPC分类号： G06F11/07
CPC分类号： H02M3/156 , H02M2001/0035 , Y02B70/16
摘要： The present invention provides a switching converter with pulse skipping mode. The switching converter comprises a switching circuit having at least one switch, a controller and a feedback circuit. The controller comprises an error amplifying circuit, a logic circuit, a ramp signal generator and a pulse skipping circuit. The error amplifying circuit generates a compensation signal based on comparing the feedback signal with a reference signal. The logic circuit generates a control signal to control the ON and OFF switching of the at least one switch based on the compensation signal. The ramp signal generator generates a ramp signal. The pulse skipping circuit generates a pulse skipping signal based on the compensation signal, the ramp signal and a threshold voltage. The logic circuit skips one or more switching pulses of the control signal in accordance with the pulse skipping signal.
摘要翻译：本发明提供一种具有脉冲跳跃模式的开关转换器。开关转换器包括具有至少一个开关，控制器和反馈电路的开关电路。控制器包括误差放大电路，逻辑电路，斜坡信号发生器和脉冲跳跃电路。误差放大电路基于将反馈信号与参考信号进行比较来产生补偿信号。逻辑电路产生控制信号，以根据补偿信号控制至少一个开关的ON和OFF切换。斜坡信号发生器产生斜坡信号。脉冲跳跃电路基于补偿信号，斜坡信号和阈值电压产生脉冲跳跃信号。逻辑电路根据脉冲跳跃信号跳过控制信号的一个或多个开关脉冲。

5. 发明申请

US20130002461A1 SAMPLE AND HOLD CIRCUIT AND THE METHOD THEREOF 有权
标题翻译：采样和保持电路及其方法
公开(公告)号：US20130002461A1
公开(公告)日：2013-01-03
申请号：US13538940
申请日：2012-06-29
申请人： Yike Li , Xiaoyu Xi , Fei Wang , Zhengxin Li
发明人： Yike Li , Xiaoyu Xi , Fei Wang , Zhengxin Li
IPC分类号： H03M1/00
CPC分类号： H03K5/1532
摘要： A sample and hold circuit and the method thereof are disclosed. The sample and hold circuit may be applied in voltage regulators or other circuits. The sample and hold circuit comprises: an input terminal configured to receive an input signal; an output terminal configured to provide an output signal; a control circuit configured to receive the input signal and the output signal, and wherein based on the input signal and the output signal, the control circuit generates a digital signal, and wherein the digital signal increases when the output signal is lower than the input signal, and maintains when the output signal is larger than or equal to the input signal; a digital-to-analog converter (DAC) configured to convert the digital signal to the output signal.
摘要翻译：公开了采样保持电路及其方法。采样保持电路可以应用在电压调节器或其他电路中。采样和保持电路包括：输入端，被配置为接收输入信号; 输出端子，被配置为提供输出信号; 控制电路，被配置为接收所述输入信号和所述输出信号，并且其中基于所述输入信号和所述输出信号，所述控制电路产生数字信号，并且其中当所述输出信号低于所述输入信号时，所述数字信号增加并且当输出信号大于或等于输入信号时保持; 配置为将数字信号转换为输出信号的数模转换器（DAC）。

6. 发明申请

US20100253309A1 ACCURATE CURRENT LIMIT FOR PEAK CURRENT MODE DC-DC CONVERTER 有权
标题翻译：峰值电流模式DC-DC转换器的精确电流限制
公开(公告)号：US20100253309A1
公开(公告)日：2010-10-07
申请号：US12419217
申请日：2009-04-06
申请人： Xiaoyu Xi , Jian Zhou
发明人： Xiaoyu Xi , Jian Zhou
IPC分类号： G05F1/10
CPC分类号： H02M3/156
摘要： The present invention discloses an accurate current limit for peak current mode DC-DC converters by detecting the peak value of the slope compensation.
摘要翻译：本发明公开了通过检测斜率补偿的峰值的峰值电流模式DC-DC转换器的精确电流限制。

7. 发明申请

US20060139022A1 System and method for generating a reference voltage 失效
标题翻译：用于产生参考电压的系统和方法
公开(公告)号：US20060139022A1
公开(公告)日：2006-06-29
申请号：US11022044
申请日：2004-12-23
申请人： Xiaoyu Xi
发明人： Xiaoyu Xi
IPC分类号： G05F3/16
CPC分类号： G05F3/267
摘要： Systems and methods for generating a reference voltage are disclosed. In one embodiment, an output voltage is generated that is the sum of a desirable reference voltage component and an undesirable voltage component. An additional voltage component that tends to be equal and opposite in sign to the undesirable voltage component is added to the output voltage, the additional voltage component thereby tending to cancel the undesirable voltage component.
摘要翻译：公开了用于产生参考电压的系统和方法。在一个实施例中，产生作为期望的参考电压分量和不期望的电压分量之和的输出电压。趋向于相等且与符号相反的不合要求的电压分量的附加电压分量被加到输出电压上，附加电压分量因此倾向于消除不期望的电压分量。

8. 发明申请

US20060097710A1 Current sensing circuitry for DC-DC converters 有权
公开(公告)号：US20060097710A1
公开(公告)日：2006-05-11
申请号：US10984283
申请日：2004-11-09
申请人： Xiaoyu Xi
发明人： Xiaoyu Xi
IPC分类号： G05F1/40
CPC分类号： H02M3/156 , H02M2001/0009
摘要： An inductor based DC-DC converter of the present invention employs two power switches such that only a fraction of inductor current flows through sensing circuitry. The sensing circuitry itself is comprised of sense transistors instead of resistors in order to further reduce power dissipation and temperature variations. The sensing circuitry includes a differential power supply that modifies a sense current employed as feedback to one of its inputs. The sense transistors are selected and configured such that the sense current is a relatively constant fraction of the inductor current of the converter.

9. 发明申请

US20050237688A1 CURRENT LIMIT PROTECTION SCHEME FOR PWM BUCK CONVERTER WITH SYNCHRONOUS RECTIFIER 有权
标题翻译：具有同步整流器的PWM保险丝转换器的电流限制保护方案
公开(公告)号：US20050237688A1
公开(公告)日：2005-10-27
申请号：US10833683
申请日：2004-04-27
申请人： Kae Wong , Xiaoyu Xi
发明人： Kae Wong , Xiaoyu Xi
IPC分类号： H02H3/08 , H02H9/02 , H02M1/00 , H02M3/158
CPC分类号： H02M3/1588 , H02M1/32 , H02M2001/0009 , Y02B70/1466
摘要： A embedded overcurrent protection circuit within the PWM feedback controller (30) of a power converter (100) having an novel current limit detection function that minimizes the effects of the turn-on period of the power device (14) is disclosed herein. This power converter includes a current limit detection circuit (10-20) that is reset on the rising edge of the system clock in a first step. In a second step, the power device (14) that is turned on. In another step, a current detecting circuit (10-20) detects the drain-to-source voltage across the power device (14) and the output current generated thereby. A sense circuit (18) compares the output current detected with a first predetermined limit value in another step. When the output current is less than the first predetermined limit value, a step is conducted where the output current is regulated by modulating the pulse width of the signal sent by a driver (12) to the control node of the power device (14). In the alternative, when the output current exceeds the first predetermined limit value, the power device (14) is turned off and the synchronous rectifier (16) is turned on while its current is monitored at a second predetermined limit value in another step. This synchronous rectifier (16) monitoring step enables the current limit detection circuit (10-20)to minimize the effects of the turn-on period of the power device (14). Finally, the current limit detection circuit (10-20) is reset on the rising edge of the system clock and wherein this entire procedure is continuous.
摘要翻译：这里公开了功率转换器（100）的PWM反馈控制器（30）内的嵌入式过电流保护电路，其具有使功率器件（14）的导通周期的影响最小化的新型限流检测功能。该电力转换器包括在第一步骤中在系统时钟的上升沿复位的限流检测电路（10-20）。在第二步骤中，打开电源装置（14）。在另一步骤中，电流检测电路（10-20）检测功率器件（14）两端的漏极 - 源极电压和由此产生的输出电流。感测电路（18）将检测到的输出电流与另一步骤中的第一预定极限值进行比较。当输出电流小于第一预定极限值时，进行通过调制由驱动器（12）发送到电力设备（14）的控制节点的信号的脉冲宽度来调节输出电流的步骤。另一方面，当输出电流超过第一预定极限值时，功率器件（14）关闭，并且同步整流器（16）导通，同时在另一步骤中以第二预定极限值监视其电流。该同步整流器（16）监视步骤使电流限制检测电路（10-20）能够最小化功率器件（14）的导通周期的影响。最后，电流限制检测电路（10-20）在系统时钟的上升沿复位，其中整个过程是连续的。

10. 发明申请

US20130009617A1 CONTROL CIRCUITS FOR SWITCHING POWER CONVERTERS AND ASSOCIATED METHODS 有权
标题翻译：用于切换电源转换器和相关方法的控制电路
公开(公告)号：US20130009617A1
公开(公告)日：2013-01-10
申请号：US13542509
申请日：2012-07-05
申请人： Xiaoyu Xi , Paul Ueunten
发明人： Xiaoyu Xi , Paul Ueunten
IPC分类号： G05F1/10
CPC分类号： H02M3/156
摘要： The present application discloses a control circuit of a switching power converter, wherein the switching power converter comprises a power switch, and is configured to convert an input voltage into an output voltage, the control circuit comprises: a first time generating circuit configured to generate a first time signal; a phase lock circuit configured to generate a second time signal; and a switching signal generating circuit configured to generate a switching signal to control the ON and OFF switching of the power switch. The phase lock circuit generates the second time signal in accordance with the frequency difference between the switching signal and a reference clock signal, so as to get the frequency of the switching signal to be substantially equal to the frequency of the reference clock signal.
摘要翻译：本申请公开了一种开关电源转换器的控制电路，其中开关电源转换器包括电源开关，并且被配置为将输入电压转换为输出电压，该控制电路包括：第一时间生成电路，第一时间信号; 配置为产生第二时间信号的锁相电路; 以及切换信号发生电路，被配置为产生开关信号以控制电源开关的接通和断开。锁相电路根据切换信号和基准时钟信号之间的频率差产生第二时间信号，以使切换信号的频率基本上等于参考时钟信号的频率。

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