公开(公告)号：US06900623B2

公开(公告)日：2005-05-31

申请号：US10617515

申请日：2003-07-10

Applicant: Ta-yung Yang ,  Yi-Hsin Leu ,  Chern-Lin Chen ,  Jenn-yu G. Lin

Inventor： Ta-yung Yang ,  Yi-Hsin Leu ,  Chern-Lin Chen ,  Jenn-yu G. Lin

IPC: G05F1/40 ,  G05F1/56 ,  H02M1/00 ,  H02M1/42 ,  H02M7/00

CPC classification number: H02M1/4225 ,  H02M2001/4275 ,  Y02B70/126

Abstract: A regulated power supply having power factor correction control includes a multi-vector error amplifier. The multi-vector error amplifier provides an error signal that is used to regulate a switching mechanism of the power supply. The multi-vector error amplifier acts to provide a low distortion error signal during steady-state operation, while responding rapidly and smoothly to sudden load changes.

Abstract translation: 具有功率因数校正控制的稳压电源包括多向量误差放大器。 多向量误差放大器提供了用于调节电源开关机构的误差信号。 多向量误差放大器用于在稳态运行期间提供低失真误差信号，同时快速平稳地响应突然的负载变化。

公开(公告)号：US06781356B1

公开(公告)日：2004-08-24

申请号：US10249217

申请日：2003-03-24

Applicant: Ta-yung Yang ,  Chem-Lin Chen ,  Jenn-yu G. Lin

Inventor： Ta-yung Yang ,  Chem-Lin Chen ,  Jenn-yu G. Lin

IPC: G05F140

CPC classification number: H02M1/40 ,  H02M1/44 ,  H02M3/33507 ,  H02M2001/0032 ,  H02M2001/0041 ,  Y02B70/16

Abstract: A modulator of a PWM controller is provided for saving power and reducing acoustic noise in the light load and no load conditions. The maximum on-time is kept as a constant and a bias current of the oscillator in the PWM controller is moderated to achieve the off-time modulation. The bias current is a function of the supply voltage and the feedback voltage, which is derived from a voltage feedback loop. A threshold voltage defines the level of the light load. A limit voltage defines the low level of the supply voltage. A bias current synthesizer generates the bias current. Reducing the bias current increases the off-time of the switching period. Once the feedback voltage is decreased lower than the threshold voltage, the bias current is reduced linearly and the off-time of the switching period is increased gradually. When the supply voltage is lower than the limit voltage, the bias current increases and determines a maximum off-time of the switching period. Keeping the maximum on-time as a constant and increasing the switching period by only increasing the off-time prevents magnetic components, such as inductors and transformers, from being saturated. Furthermore, a control circuit disables the oscillator as the PWM frequency may fall into the audio band, therefore the acoustic noise can be greatly reduced in the light load and no load conditions.

Abstract translation: 提供PWM控制器的调制器，用于在轻负载和无负载条件下节省电力并降低噪声。 将最大导通时间保持为恒定，并且调节PWM控制器中的振荡器的偏置电流以实现关断时间调制。 偏置电流是由电压反馈回路导出的电源电压和反馈电压的函数。 阈值电压定义轻负载的电平。 极限电压定义电源电压的低电平。 偏置电流合成器产生偏置电流。 降低偏置电流会增加开关周期的关断时间。 一旦反馈电压降低到低于阈值电压，则偏置电流线性减小，并且切换周期的关闭时间逐渐增加。 当电源电压低于极限电压时，偏置电流增加并确定开关周期的最大关断时间。 保持最大导通时间为常数，并通过增加关断时间来增加开关周期，防止磁性元件（如电感器和变压器）饱和。 此外，由于PWM频率可能落入音频频带，所以控制电路使振荡器不起作用，因此在轻负载和无负载条件下可以大大降低声学噪声。

公开(公告)号：US06768657B1

公开(公告)日：2004-07-27

申请号：US10249141

申请日：2003-03-19

Applicant: Ta-yung Yang ,  Chern-Lin Chen ,  Jenn-yu G. Lin

Inventor： Ta-yung Yang ,  Chern-Lin Chen ,  Jenn-yu G. Lin

IPC: H02M114

CPC classification number: H02M3/33507

Abstract: Incorporating the PWM function with the power saving means develops the PWM controller in which the switching frequency is decreased in response to the decrease of the load. Further, the current-driven design minimizes the circuitry and reduces the cost of the PWM controller. Since most of the control signals are operated in current mode, the die size of integrated circuit of the PWM controller is greatly reduced. An off-time modulator is provided for power saving in which the discharge current of the oscillator is modulated. Keeping the maximum on-time of the PWM signal as a constant and increasing the off-time of the PWM signal extends the switching period in light load conditions. The off-time modulation is the function of a feedback current, which is derived from the feedback loop. An array of current operation is designed to generate the feedback voltage for the PWM control and meanwhile produces a modulated discharge current for power saving. A minimum discharge current is limited to prevent the switching frequency from flowing into the audio-band. Moreover, the minimum discharge current is switched on/off in response to the state of the supply voltage in which the minimum discharge current is disabled when the supply voltage is high, and enabled once the supply voltage is lower than a threshold voltage; thereby preventing insufficient power from being supplied from the auxiliary bias winding for the PWM controller.

Abstract translation: 将PWM功能与省电装置相结合，开发出响应于负载减小而开关频率降低的PWM控制器。 此外，电流驱动设计可最大限度地减少电路并降低PWM控制器的成本。 由于大多数控制信号以电流模式工作，PWM控制器的集成电路的管芯尺寸大大降低。 提供了一种关断时间调制器用于节能，其中调制振荡器的放电电流。 将PWM信号的最大导通时间保持为常数，并增加PWM信号的关断时间在轻负载条件下延长了开关周期。 关断时间调制是反馈电流的函数，反馈电流是从反馈回路得到的。 设计了一个电流运算阵列，用于产生PWM控制的反馈电压，同时产生调制放电电流，实现省电。 限制最小放电电流以防止开关频率流入音频带。 此外，当电源电压高时，响应于最小放电电流被禁止的电源电压的状态，最小放电电流被接通/断开，并且一旦电源电压低于阈值电压就启动; 从而防止从用于PWM控制器的辅助偏置绕组提供不足的功率。

公开(公告)号：US06744649B1

公开(公告)日：2004-06-01

申请号：US10248206

申请日：2002-12-27

Applicant: Ta-yung Yang ,  Jenn-yu G. Lin ,  Chern-Lin Chen

Inventor： Ta-yung Yang ,  Jenn-yu G. Lin ,  Chern-Lin Chen

IPC: H02M324

CPC classification number: H02M3/3376

Abstract: A pulse width modulated soft-switching power converter, having a pair of main switches and a pair of auxiliary switches coupled to the primary winding of the transformer. The main switches and auxiliary switches intermittently conduct an input voltage source to the primary winding to operate the soft-switching power converter in four operation stages in each switching cycle. The main switches conduct the input voltage source to the transformer in a first operation stage. In a second operation stage, the conduction is cut off. The transformer operates as an inductor with the auxiliary switches switched on under zero-voltage or zero-current switching mode in a third operation stage. In the fourth operation stage, the auxiliary switches are switched off, whereby the flyback energy achieves the zero-voltage transition. A zero-voltage-detection is employed to optimize the zero-voltage switching. The switching frequency is decreased in response to the decrease of the load. Furthermore, the auxiliary switching is restricted in accordance with the decrease of the load. Therefore reducing the power consumption in the light load and no load conditions.

Abstract translation: 一种脉宽调制软开关功率转换器，具有一对主开关和一对耦合到变压器初级绕组的辅助开关。 主开关和辅助开关间歇地将一个输入电压源传导到初级绕组，以在每个开关周期的四个运行阶段中操作软开关功率转换器。 在第一个操作阶段，主开关将输入电压源传导到变压器。 在第二操作阶段，导通被切断。 变压器作为电感器工作，辅助开关在第三个运行阶段以零电压或零电流开关模式接通。 在第四运行阶段，辅助开关被切断，由此回扫能量实现零电压转换。 采用零电压检测来优化零电压开关。 响应于负载的减小，开关频率降低。 此外，根据负载的减少来限制辅助开关。 因此降低轻载和无负载条件下的功耗。

公开(公告)号：US06611439B1

公开(公告)日：2003-08-26

申请号：US10065530

申请日：2002-10-28

Applicant: Ta-yung Yang ,  Jenn-yu G. Lin ,  Shu-chung Yi

Inventor： Ta-yung Yang ,  Jenn-yu G. Lin ,  Shu-chung Yi

IPC: H02M3335

CPC classification number: H02M3/33523 ,  H02M1/36 ,  H02M2001/0022

Abstract: A PWM controller has a line voltage input that allows using an input resistor for both start-up and power-limit compensation, thus saving the power consumption, easing the PCB layout, and shrinking the power supply size. In the integrated circuit, a mirrored-resistor used for the power limit compensation is composed of a mirror MOSFET, which is associated with an op amplifier, a constant voltage and a constant current to provide a precise resistance. Thus, by properly selecting the value of the input resistor, an identical output power limit for low line and high line voltage input can be achieved.

Abstract translation: PWM控制器具有线路电压输入，允许使用输入电阻进行启动和功耗限制补偿，从而节省功耗，减轻PCB布局，缩小电源尺寸。 在集成电路中，用于功率限制补偿的镜像电阻由镜像MOSFET组成，其与运算放大器，恒定电压和恒定电流相关联，以提供精确的电阻。 因此，通过适当地选择输入电阻的值，可以实现对于低线路和高线路电压输入的相同的输出功率限制。

公开(公告)号：US06418002B1

公开(公告)日：2002-07-09

申请号：US09607029

申请日：2000-06-29

Applicant: Ta-yung Yang ,  Jenn-yu G. Lin ,  Rui-hong Lu

Inventor： Ta-yung Yang ,  Jenn-yu G. Lin ,  Rui-hong Lu

IPC: H02H300

CPC classification number: G06F1/28 ,  G06F1/30 ,  H02H3/20 ,  H02H3/207 ,  H02H3/247 ,  H02H7/1227

Abstract: A power supply supervisor having a line voltage detector is used to monitor a power supply. A peak detector detects the line voltage by measuring the PWM switching signal in the secondary of the transformer. A logic circuit couples to the peak detector and the under-voltage detector, etc. to generate a power good (PG) signal when the power supply outputs meet the specifications. The logic circuit outputs a FAIL signal to turn off the power supply when an abnormal situation, such as over-voltage, occurs. Furthermore, when AC power is lost or turned off, the logic circuit detects a low line voltage and generates a power-down-warning PG signal before the output voltages are disabled. When an abnormal situation occurs before the low line voltage is detected, the logic circuit latches the power supply in a power off state. If the abnormal situation occurs after the low line voltage is detected, the logic circuit turns off the power outputs, but disables the latch function. In the meantime, a time delay circuit is applied to postpone the power off status, in which the time delay limits the duty cycle of power outputs and protects the power supply from over-stress damage.

Abstract translation: 具有线路电压检测器的电源管理器用于监视电源。 峰值检测器通过测量变压器次级中的PWM开关信号来检测线路电压。 当电源输出满足规格时，逻辑电路耦合到峰值检测器和欠压检测器等，以产生电源良好（PG）信号。 当发生异常情况（如过电压）时，逻辑电路输出FAIL信号以关闭电源。 此外，当交流电源丢失或关闭时，逻辑电路检测到低电压电压，并且在禁用输出电压之前产生掉电警告PG信号。 当在检测到低线电压之前发生异常情况时，逻辑电路将电源锁定在断电状态。 如果在检测到低电压电压后发生异常情况，则逻辑电路关闭电源输出，但禁用锁存功能。 同时延时电路用于推迟断电状态，延时限制电源输出的占空比，保护电源免受过度应力损坏。

公开(公告)号：US06353405B1

公开(公告)日：2002-03-05

申请号：US09607095

申请日：2000-06-29

Applicant: Ta-yung Yang ,  Jenn-yu G. Lin

Inventor： Ta-yung Yang ,  Jenn-yu G. Lin

IPC: H03M112

CPC classification number: H03M1/1028 ,  H03M1/12

Abstract: An analog to digital video converter is made of a differential correlated double sampling (DCDS) module, a DC bias circuit, an adjustment module and an analog-to-digital converter. The DCDS module samples a red, a green, and a blue analog signal respectively with a delay time, and then selects one of the sampled signals for outputting. The DC bias circuit is connected to the DCDS module for performing an analog addition to the output signal of the DCDS module. The adjustment module converts the digital adjustment data to an analog adjustable reference voltage. The analog-to-digital converter is connected to the output of the DC bias circuit and the adjustment module. By referring the adjustable reference voltage, the analog-to-digital converter converts the analog input signal to a digital output signal. Therefore, the analog input signal is equivalently adjusted by scaling the adjustable reference voltage.

Abstract translation: 模数转换器由差分相关双采样（DCDS）模块，直流偏置电路，调节模块和模数转换器组成。 DCDS模块以延迟时间分别采样一个红色，绿色和蓝色模拟信号，然后选择一个采样信号进行输出。 DC偏置电路连接到DCDS模块，用于对DCDS模块的输出信号进行模拟加法。 调整模块将数字调节数据转换为模拟可调参考电压。 模数转换器连接到直流偏置电路和调节模块的输出端。 通过参考可调参考电压，模数转换器将模拟输入信号转换为数字输出信号。 因此，通过缩放可调参考电压来等效地调整模拟输入信号。