公开(公告)号：US20100201335A1

公开(公告)日：2010-08-12

申请号：US12687035

申请日：2010-01-13

申请人： En Li ,  Yang Shi ,  Huanyu Lu ,  Junming Zhang ,  Yuancheng Ren

发明人： En Li ,  Yang Shi ,  Huanyu Lu ,  Junming Zhang ,  Yuancheng Ren

IPC分类号： G05F1/10

CPC分类号： H02M3/33507

摘要： The present invention provides an off time control method and switching regulator using it. The current flowing through a switch is compared with a current threshold, and the switch is turned off if the current flowing through the switch is larger than the current threshold. The off time of the switch is determined by the load. The current threshold is variable at light load to prevent generating the audible noise and improve the whole efficiency.

摘要翻译： 本发明提供一种关闭时间控制方法和使用它的开关调节器。 将流过开关的电流与电流阈值进行比较，并且如果流过开关的电流大于电流阈值，则开关断开。 开关的关闭时间由负载决定。 电流阈值在轻负载时可变，防止产生可听噪声，提高整体效率。

公开(公告)号：US20100141149A1

公开(公告)日：2010-06-10

申请号：US12634005

申请日：2009-12-09

申请人： Bairen Liu ,  Lei Du ,  Yuancheng Ren

发明人： Bairen Liu ,  Lei Du ,  Yuancheng Ren

IPC分类号： H05B41/00

CPC分类号： H05B41/2855

摘要： The present disclosure provides methods and apparatus for fault protection for electronic devices (e.g., cold cathode fluorescent lamps). In one embodiment, a fault signal is detected and compared with a threshold to output a comparison signal. The comparison signal is then processed to generate a trigger signal, which triggers a fault control block once it satisfies certain fault conditions.

摘要翻译： 本公开提供了用于电子设备（例如，冷阴极荧光灯）的故障保护的方法和装置。 在一个实施例中，检测故障信号并将其与阈值进行比较以输出比较信号。 然后处理比较信号以产生触发信号，一旦满足某些故障条件，则触发故障控制块。

公开(公告)号：US07728666B2

公开(公告)日：2010-06-01

申请号：US12169539

申请日：2008-07-08

申请人： Junming Zhang ,  Yuancheng Ren ,  Yunping Lang

发明人： Junming Zhang ,  Yuancheng Ren ,  Yunping Lang

IPC分类号： H03F3/217

CPC分类号： H03F3/217

摘要： The present invention discloses a Class-D power amplifier and control method thereof. In one embodiment, the amplifier feeds back the signal at the output node to the inverting input of the comparator, and provides a high frequency triangular wave signal to the non-inverting input of the comparator. In addition, the non-inverting input of the comparator may be coupled to an offset voltage, while the inverting input of the comparator may be coupled to a fixed-frequency rectangular wave signal, a feedback signal which is derived from the output stage and an input signal. In use, the switching frequency may be at least substantially fixed, so as to reduce the influence on the system caused by electromagnetic interruption (EMI). Further, the control circuit is simple, and some devices can be integrated.

摘要翻译： 本发明公开了一种D类功率放大器及其控制方法。 在一个实施例中，放大器将输出节点处的信号反馈到比较器的反相输入，并向比较器的非反相输入端提供高频三角波信号。 此外，比较器的非反相输入可以耦合到偏移电压，而比较器的反相输入可以耦合到固定频率矩形波信号，从输出级导出的反馈信号和 输入信号。 在使用中，开关频率可以至少基本上固定，以便减少由电磁干扰（EMI）引起的对系统的影响。 此外，控制电路简单，一些设备可以集成。

公开(公告)号：US20090045873A1

公开(公告)日：2009-02-19

申请号：US12169539

申请日：2008-07-08

申请人： Junming Zhang ,  Yuancheng Ren ,  Yunping Lang

发明人： Junming Zhang ,  Yuancheng Ren ,  Yunping Lang

IPC分类号： H03F3/217

CPC分类号： H03F3/217

摘要： The present invention discloses a Class-D power amplifier and control method thereof. In one embodiment, the amplifier feeds back the signal at the output node to the inverting input of the comparator, and provides a high frequency triangular wave signal to the non-inverting input of the comparator. In addition, the non-inverting input of the comparator may be coupled to an offset voltage, while the inverting input of the comparator may be coupled to a fixed-frequency rectangular wave signal, a feedback signal which is derived from the output stage and an input signal. In use, the switching frequency may be at least substantially fixed, so as to reduce the influence on the system caused by electromagnetic interruption (EMI). Further, the control circuit is simple, and some devices can be integrated.

摘要翻译： 本发明公开了一种D类功率放大器及其控制方法。 在一个实施例中，放大器将输出节点处的信号反馈到比较器的反相输入，并向比较器的非反相输入端提供高频三角波信号。 此外，比较器的非反相输入可以耦合到偏移电压，而比较器的反相输入可以耦合到固定频率矩形波信号，从输出级导出的反馈信号和 输入信号。 在使用中，开关频率可以至少基本上固定，以便减少由电磁干扰（EMI）引起的对系统的影响。 此外，控制电路简单，一些设备可以集成。

公开(公告)号：US07184281B2

公开(公告)日：2007-02-27

申请号：US10969215

申请日：2004-10-21

申请人： Yuancheng Ren ,  Fred C. Lee

发明人： Yuancheng Ren ,  Fred C. Lee

IPC分类号： H02M3/335 ,  G01F17/00 ,  G05F1/40

CPC分类号： H02M1/38 ,  H01F3/14 ,  H01F30/04 ,  H02M3/1588 ,  H03K17/08122 ,  Y02B70/1466

摘要： A buck converter has a driver circuit with a drive transformer that provides complementary voltages to the buck converter switches. The drive transformer may have two secondary windings, with one winding for each converter switch. As one converter switch experiences a rising gate voltage, the other converter switch experiences a falling gate voltage. Since both converter switches are controlled by the same driver switches, the converter switch dead time is very small. Preferably, at least one converter switch has a voltage shift circuit connected to the gate electrode. Adjustment of the voltage shift magnitude will advance or delay the turn on and turn off times of the switch. Hence, the converter switch dead time can be precisely adjusted by varying the voltage shift magnitude. Preferably, the converter switch dead time is less than 1 or 2 nanoseconds.

摘要翻译： 降压转换器具有驱动电路，其中驱动变压器为降压转换器开关提供互补电压。 驱动变压器可以具有两个次级绕组，每个转换器开关有一个绕组。 当一个转换器开关经历上升栅极电压时，另一个转换器开关经历栅极电压下降。 由于两个转换器开关由相同的驱动器开关控制，所以转换器开关死区时间非常小。 优选地，至少一个转换器开关具有连接到栅电极的电压移位电路。 电压偏移幅度的调整将推进或延迟开关的导通和关闭时间。 因此，可以通过改变电压偏移量来精确地调整转换器开关死区时间。 优选地，转换器开关死区时间小于1或2纳秒。

公开(公告)号：US09325237B2

公开(公告)日：2016-04-26

申请号：US13554497

申请日：2012-07-20

申请人： Yuancheng Ren

发明人： Yuancheng Ren

IPC分类号： H05B37/02 ,  H02M3/07

CPC分类号： H02M3/07

摘要： The present invention provides a power supply comprising a driver and a charge pump. The driver is configured to provide a driving signal to a load. The charge pump comprises a first capacitor coupled to the load in parallel, at least one flying capacitor, a second capacitor and a switch array comprising a plurality of switches. The switch array is coupled to the first capacitor, the second capacitor and the at least one flying capacitor. The switch array receives the voltage across the first capacitor and controls the charge and discharge of the at least one flying capacitor, so as to make the voltage across the second capacitor be larger than the voltage across the first capacitor.

摘要翻译： 本发明提供一种包括驱动器和电荷泵的电源。 驱动器被配置为向负载提供驱动信号。 电荷泵包括并联耦合到负载的第一电容器，至少一个飞越电容器，第二电容器和包括多个开关的开关阵列。 开关阵列耦合到第一电容器，第二电容器和至少一个飞行电容器。 开关阵列接收第一电容器两端的电压，并控制至少一个飞越电容器的充电和放电，以使第二电容器两端的电压大于第一电容器两端的电压。

公开(公告)号：US08971061B2

公开(公告)日：2015-03-03

申请号：US12687035

申请日：2010-01-13

申请人： En Li ,  Yang Shi ,  Huanyu Lu ,  Junming Zhang ,  Yuancheng Ren

发明人： En Li ,  Yang Shi ,  Huanyu Lu ,  Junming Zhang ,  Yuancheng Ren

IPC分类号： H02M3/335

CPC分类号： H02M3/33507

摘要： The present invention provides an off time control method and switching regulator using it. The current flowing through a switch is compared with a current threshold, and the switch is turned off if the current flowing through the switch is larger than the current threshold. The off time of the switch is determined by the load. The current threshold is variable at light load to prevent generating the audible noise and improve the whole efficiency.

摘要翻译： 本发明提供一种关闭时间控制方法和使用它的开关调节器。 将流过开关的电流与电流阈值进行比较，并且如果流过开关的电流大于电流阈值，则开关断开。 开关的关闭时间由负载决定。 电流阈值在轻负载时可变，防止产生可听噪声，提高整体效率。

公开(公告)号：US08773090B2

公开(公告)日：2014-07-08

申请号：US13175543

申请日：2011-07-01

申请人： Qian Ouyang ,  Yuancheng Ren

发明人： Qian Ouyang ,  Yuancheng Ren

IPC分类号： G05F1/618

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

摘要： A voltage regulator with adaptive hysteretic control. The voltage regulator may include a top switch (e.g., MOSFET) configured to couple a power supply supplying an input voltage to a load. An adaptive hysteretic control circuit of the voltage regulator may turn on the top switch when the feedback voltage reaches the low threshold and turn off the top switch when the feedback voltage reaches the high threshold. The adaptive hysteretic control circuit may adjust the upper and lower threshold to make the voltage regulator working like a constant on time control circuit in steady state. When a step down transient happens, the top switch could be turned off when the output voltage reaches the upper threshold, and when a step up transient happens, the top switch could be turned on when the output voltage reaches the lower threshold, it makes the voltage regulator working like a hysteretic control circuit.

摘要翻译： 具有自适应迟滞控制的电压调节器。 电压调节器可以包括被配置为将提供输入电压的电源耦合到负载的顶部开关（例如，MOSFET）。 当反馈电压达到低阈值时，电压调节器的自适应迟滞控制电路可以接通顶部开关，并且当反馈电压达到高阈值时关闭顶部开关。 自适应迟滞控制电路可以调节上限和下限阈值，使电压调节器工作在恒定的导通时间控制电路处于稳定状态。 当降压瞬变发生时，当输出电压达到上限阈值时，顶部开关可以关闭，当发生升压瞬变时，当输出电压达到下限阈值时，顶部开关可以导通， 电压调节器像滞后控制电路一样工作。

公开(公告)号：US20140043875A1

公开(公告)日：2014-02-13

申请号：US13572564

申请日：2012-08-10

申请人： Michael Hsing ,  Eric Yang ,  Zheng Luo ,  Ken Yi ,  Yiqing Jin ,  Yuancheng Ren

发明人： Michael Hsing ,  Eric Yang ,  Zheng Luo ,  Ken Yi ,  Yiqing Jin ,  Yuancheng Ren

IPC分类号： H02M7/04

CPC分类号： H02M7/2176 ,  G05F1/56 ,  H02M2001/0045

摘要： The present invention discloses an off-line regulator. The off-line regulator comprises a rectification circuit configured to rectify an AC line voltage into a rectified line voltage; a pass device coupled between the rectified line voltage and a first capacitor, the pass device is configured to be turned ON or OFF according to a comparison signal indicating whether the rectified line voltage is over a threshold voltage. The first capacitor delivers an interim voltage into a converter which supplies power to a load. Wherein a second capacitor coupled across a driver which driving the pass device is charged by the first capacitor when the comparison signal is at a first state, and the driver is boosted when the comparison signal is at a second state.

摘要翻译： 本发明公开了一种离线调节器。 离线调节器包括：整流电路，被配置为将AC线电压整流为整流线电压; 耦合在整流线路电压和第一电容器之间的通过装置，根据指示整流线路电压是否超过阈值电压的比较信号，通过装置被配置为接通或关断。 第一个电容器将中间电压提供给向负载供电的转换器。 其中当比较信号处于第一状态时，驱动通过装置的驱动器耦合的第二电容器被第一电容器充电，并且当比较信号处于第二状态时驱动器被升压。

公开(公告)号：US08537584B2

公开(公告)日：2013-09-17

申请号：US12824076

申请日：2010-06-25

申请人： Yuancheng Ren ,  Junming Zhang ,  Lei Miao ,  Zhaoqi Mao

发明人： Yuancheng Ren ,  Junming Zhang ,  Lei Miao ,  Zhaoqi Mao

IPC分类号： H02M7/217

CPC分类号： H02M3/33592 ,  H02M2001/0032 ,  Y02B70/1475 ,  Y02B70/16

摘要： Disclosed is a light load control circuit and the method accordingly where the synchronous rectification is latched off when the light load condition is detected for several successive cycles.

摘要翻译： 公开了一种轻负载控制电路及其相应的方法，其中当在几个连续循环中检测到轻载条件时，同步整流被锁存。