公开(公告)号：US20100066331A1

公开(公告)日：2010-03-18

申请号：US12585474

申请日：2009-09-16

Applicant: Chao Chieh Chang ,  Ko-Cheng Wang

Inventor： Chao Chieh Chang ,  Ko-Cheng Wang

IPC: G05F1/10

CPC classification number: H02M3/156 ,  H02M2001/0025

Abstract: A level-switching device is coupled to an output node of a PWM converter to switch the output voltage of the PWM converter between two levels by switching a MOS. An undershoot/overshoot eliminator is coupled to the MOS for the MOS changing from totally on state to totally off state or vice versa softly when switching the MOS. The feedback signal transition in the level-switching device becomes slower when switching the MOS to eliminate overshoot/undershoot on the output voltage.

Abstract translation: 电平切换装置耦合到PWM转换器的输出节点，通过切换MOS来切换两个电平之间的PWM转换器的输出电压。 下冲/过冲消除器耦合到MOS，用于MOS切换时从MOS完全断开状态或反之亦然。 当切换MOS以消除输出电压上的过冲/下冲时，电平切换装置中的反馈信号转变变慢。

公开(公告)号：US20070046358A1

公开(公告)日：2007-03-01

申请号：US11498240

申请日：2006-08-03

Applicant: Ko-Cheng Wang ,  Liang-Pin Tai

Inventor： Ko-Cheng Wang ,  Liang-Pin Tai

IPC: H03K17/04

CPC classification number: H03K17/693 ,  H03K17/04123 ,  H03K17/0414

Abstract: A quick turn on apparatus and method for a NMOSFET switch are used to maintain the gate voltage of the NMOSFET switch non-zero but not enough to turn on the NMOSFET switch, such that the NMOSFET switch turns on more quickly when it is to be turned on. Seamless transition can be further achieved in a single pole double throw switching circuit by using the quick turn on apparatus and method.

Abstract translation: 用于NMOSFET开关的快速启动装置和方法用于将NMOSFET开关的栅极电压保持为非零，但不足以导通NMOSFET开关，使得NMOSFET开关在其被转动时更快地接通 上。 通过使用快速打开设备和方法，可以在单刀双掷切换电路中进一步实现无缝转换。

公开(公告)号：US09489001B2

公开(公告)日：2016-11-08

申请号：US14735176

申请日：2015-06-10

Applicant: Ko-Cheng Wang

Inventor： Ko-Cheng Wang

IPC: H02M3/156 ,  G05F1/575 ,  H02M1/08 ,  H02M3/157

CPC classification number: G05F1/575 ,  H02M1/08 ,  H02M3/156

Abstract: A constant ON-time or constant OFF-time switching power converter includes a control circuit for controlling a power switch. The control circuit includes: a constant ON-time or constant OFF-time calculation circuit, for calculating a constant ON-time or constant OFF-time; a logic circuit having inputs for receiving an output of the constant ON-time or constant OFF-time calculation circuit and a clock signal, respectively, wherein the clock signal has a frequency which is the desired fixed frequency; and a flip-flop for generating an output signal according to a set input and a reset input, wherein one of the set input and the reset input receives an output of the logic circuit, and the other one of the set input and the reset input receives a trigger signal which determines a start time of the ON-time or OFF-time.

Abstract translation: 恒定的导通时间或恒定的关断时间切换功率转换器包括用于控制电源开关的控制电路。 控制电路包括：用于计算常数接通时间或恒定关断时间的恒定导通时间或恒定关断时间计算电路; 逻辑电路，其具有分别用于接收恒定导通时间或恒定关断时间计算电路的输出的输入端和时钟信号，其中所述时钟信号具有期望的固定频率的频率; 以及触发器，用于根据设定输入和复位输入产生输出信号，其中所述设定输入和复位输入之一接收所述逻辑电路的输出，并且所述设定输入和所述复位输入中的另一个 接收确定接通时间或关闭时间的开始时间的触发信号。

公开(公告)号：US08222876B2

公开(公告)日：2012-07-17

申请号：US12383402

申请日：2009-03-24

Applicant: Ko-Cheng Wang

Inventor： Ko-Cheng Wang

IPC: G05F1/40 ,  G05F1/44 ,  G05F1/56

CPC classification number: H02M3/156

Abstract: The present invention discloses a power management chip with a dual function pin, the power management chip outputting pulse-width-modulation signals to control the switching of an up-gate transistor and a low-gate transistor for converting an input voltage to an output voltage, the up-gate and low-gate transistors being electrically connected to a node, the power management chip comprising: a dual function pin for electrically connecting with the input voltage or the node; a voltage sensing circuit electrically connected with the dual function pin for detecting the level of the input voltage; and a clock detection circuit electrically connected with the dual function pin for determining whether the signal received by the dual function pin is an oscillation signal.

Abstract translation: 本发明公开了一种具有双功能引脚的电源管理芯片，电源管理芯片输出脉宽调制信号，以控制上电晶体管的切换和用于将输入电压转换为输出电压的低栅极晶体管 所述上电极和低栅极晶体管电连接到节点，所述电源管理芯片包括：双功能引脚，用于与所述输入电压或所述节点电连接; 电压检测电路，与双功能引脚电连接，用于检测输入电压的电平; 以及与双功能引脚电连接的时钟检测电路，用于确定由双功能引脚接收的信号是否是振荡信号。

公开(公告)号：US20090174461A1

公开(公告)日：2009-07-09

申请号：US12382258

申请日：2009-03-12

Applicant: Ko-Cheng Wang ,  Liang-Pin Tai

Inventor： Ko-Cheng Wang ,  Liang-Pin Tai

IPC: H03K17/687

CPC classification number: H03K17/693 ,  H03K17/04123 ,  H03K17/0414

Abstract: A quick turn on apparatus and method for a NMOSFET switch are used to maintain the gate voltage of the NMOSFET switch non-zero but not enough to turn on the NMOSFET switch, such that the NMOSFET switch turns on more quickly when it is to be turned on. Seamless transition can be further achieved in a single pole double throw switching circuit by using the quick turn on apparatus and method.

公开(公告)号：US20130221978A1

公开(公告)日：2013-08-29

申请号：US13404928

申请日：2012-02-24

Applicant: Chia-Wei Liao ,  Ko-Cheng Wang

Inventor： Chia-Wei Liao ,  Ko-Cheng Wang

IPC: G01R31/02 ,  H05B37/02

CPC classification number: H05B33/0827 ,  G01R31/025 ,  H05B33/089

Abstract: The present invention discloses a light emitting device control circuit and a short detection circuit. The light emitting device control circuit controls a light emitting array which includes a plurality of light emitting device strings. Each light emitting device string includes a first terminal which is connected to a common node, a second terminal, and a plurality of light emitting devices connected in series. The light emitting device control circuit includes: a short detection circuit, coupled to the second terminals to receive second terminal signals from the second terminals, generating comparison signals according to whether the second terminal signals are higher than a reference signal, and generating a short detection signal according to whether a number of the comparison signals is between a first setting value and a second setting value.

Abstract translation: 本发明公开了一种发光器件控制电路和短路检测电路。 发光器件控制电路控制包括多个发光器件串的发光阵列。 每个发光器件串包括连接到公共节点的第一端子，第二端子和串联连接的多个发光器件。 发光器件控制电路包括：短路检测电路，耦合到第二端子以接收来自第二端子的第二端子信号，根据第二端子信号是否高于参考信号产生比较信号，并产生短路检测 根据多个比较信号是否处于第一设定值和第二设定值之间的信号。

公开(公告)号：US08294443B2

公开(公告)日：2012-10-23

申请号：US12585474

申请日：2009-09-16

Applicant: Chiao Chieh Chang ,  Ko-Cheng Wang

Inventor： Chiao Chieh Chang ,  Ko-Cheng Wang

IPC: G05F1/10

CPC classification number: H02M3/156 ,  H02M2001/0025

Abstract: A level-switching device is coupled to an output node of a PWM converter to switch the output voltage of the PWM converter between two levels by switching a MOS. An undershoot/overshoot eliminator is coupled to the MOS for the MOS changing from totally on state to totally off state or vice versa softly when switching the MOS. The feedback signal transition in the level-switching device becomes slower when switching the MOS to eliminate overshoot/undershoot on the output voltage.

Abstract translation: 电平切换装置耦合到PWM转换器的输出节点，通过切换MOS来切换两个电平之间的PWM转换器的输出电压。 下冲/过冲消除器耦合到MOS，用于MOS切换时从MOS完全断开状态或反之亦然。 当切换MOS以消除输出电压上的过冲/下冲时，电平切换装置中的反馈信号转变变慢。

公开(公告)号：US07576588B2

公开(公告)日：2009-08-18

申请号：US11498240

申请日：2006-08-03

Applicant: Ko-Cheng Wang ,  Liang-Pin Tai

Inventor： Ko-Cheng Wang ,  Liang-Pin Tai

IPC: H03K17/687 ,  H03K17/04 ,  G11C5/14

CPC classification number: H03K17/693 ,  H03K17/04123 ,  H03K17/0414

Abstract: A quick turn on apparatus and method for a NMOSFET switch are used to maintain the gate voltage of the NMOSFET switch non-zero but not enough to turn on the NMOSFET switch, such that the NMOSFET switch turns on more quickly when it is to be turned on. Seamless transition can be further achieved in a single pole double throw switching circuit by using the quick turn on apparatus and method.

Abstract translation: 用于NMOSFET开关的快速启动装置和方法用于将NMOSFET开关的栅极电压保持为非零，但不足以导通NMOSFET开关，使得NMOSFET开关在其被转动时更快地接通 上。 通过使用快速打开设备和方法，可以在单刀双掷切换电路中进一步实现无缝转换。

公开(公告)号：US20050258813A1

公开(公告)日：2005-11-24

申请号：US10850164

申请日：2004-05-21

Applicant: Liang-Pin Tai ,  Kent Hwang ,  Jian-Rong Huang ,  Kuo-Ping Liu ,  Cheng-Hsuan Fan ,  Ko-Cheng Wang ,  Yu-Fan Liao

Inventor： Liang-Pin Tai ,  Kent Hwang ,  Jian-Rong Huang ,  Kuo-Ping Liu ,  Cheng-Hsuan Fan ,  Ko-Cheng Wang ,  Yu-Fan Liao

IPC: G05F1/40 ,  G05F1/44 ,  H02M1/08

CPC classification number: H02M1/08

Abstract: A pulse width modulator includes an amplifier module, a comparator module, and a filter module. The amplifier module receives a feedback voltage signal from a passive network, and generates first and second non-inverted voltage signals and first and second inverted voltage signals in response to the feedback voltage signal. The comparator module receives the first and second non-inverted voltage signals and the first and second inverted voltage signals, and provides first and second differential voltage signals corresponding to the first and second non-inverted voltage signals and the first and second inverted voltage signals. The filter module is coupled between the amplifier module and the comparator module, and is operable so as to attenuate high frequency components of the first and second non-inverted voltage signals. As such, the presence of noise in the feedback voltage signal does not affect differential operation of the comparator module.

Abstract translation: 脉冲宽度调制器包括放大器模块，比较器模块和滤波器模块。 放大器模块从无源网络接收反馈电压信号，并响应于反馈电压信号产生第一和第二非反相电压信号以及第一和第二反相电压信号。 比较器模块接收第一和第二非反相电压信号以及第一和第二反相电压信号，并提供对应于第一和第二非反相电压信号以及第一和第二反相电压信号的第一和第二差分电压信号。 滤波器模块耦合在放大器模块和比较器模块之间，并且可操作以便衰减第一和第二非反相电压信号的高频分量。 因此，反馈电压信号中的噪声的存在不会影响比较器模块的差分工作。

公开(公告)号：US08896319B2

公开(公告)日：2014-11-25

申请号：US13404928

申请日：2012-02-24

Applicant: Chia-Wei Liao ,  Ko-Cheng Wang

Inventor： Chia-Wei Liao ,  Ko-Cheng Wang

IPC: G01R31/02 ,  G01R31/12

CPC classification number: H05B33/0827 ,  G01R31/025 ,  H05B33/089

Abstract: A light emitting device control circuit controls a light emitting array which includes a plurality of light emitting device strings. Each light emitting device string includes a first terminal which is connected to a common node, a second terminal, and a plurality of light emitting devices connected in series. The light emitting device control circuit includes: a short detection circuit, coupled to the second terminals to receive second terminal signals from the second terminals, generating comparison signals according to whether the second terminal signals are higher than a reference signal, and generating a short detection signal according to whether a number of the comparison signals is between a first setting value and a second setting value.

Abstract translation: 发光器件控制电路控制包括多个发光器件串的发光阵列。 每个发光器件串包括连接到公共节点的第一端子，第二端子和串联连接的多个发光器件。 发光器件控制电路包括：短路检测电路，耦合到第二端子以接收来自第二端子的第二端子信号，根据第二端子信号是否高于参考信号产生比较信号，并产生短路检测 根据多个比较信号是否处于第一设定值和第二设定值之间的信号。