公开(公告)号：US5736890A

公开(公告)日：1998-04-07

申请号：US626856

申请日：1996-04-03

申请人： H. P. Yee ,  Hiromi Ito ,  Kenji Horiguchi ,  Satoru Sawahata

发明人： H. P. Yee ,  Hiromi Ito ,  Kenji Horiguchi ,  Satoru Sawahata

IPC分类号： H01L29/78 ,  H02M7/21 ,  H02M7/217 ,  H03K17/082 ,  H03K17/56

CPC分类号： H02M7/217 ,  H03K17/0822 ,  H03K2017/307

摘要： A rectifying device comprising of a SRMOS, an inductor, and a control circuit is disclosed. The SRMOS has a gate, a drain, and a source. The gate of the SRMOS is connected to the output of the control circuit. The inductor is connected to the drain of the SRMOS. The control circuit uses two sense traces for determining the voltage (or current) passing between the inductor (that is connected to the drain) and the source of the SRMOS. Upon sensing a forward characteristic (voltage or current), the SRMOS forward biases to allow current to flow through the SRMOS. Upon sensing a reverse characteristic (voltage or current), the SRMOS reverse biases to cut off any current flow. Hysteresis is used in setting the forward biasing threshold voltage and the reverse biasing threshold voltage for the SRMOS. In reverse biasing and forward biasing the SRMOS, V.sub.gs is stepped (or curved) controlled to avoid false turn ON/OFF of the SRMOS.

摘要翻译： 公开了一种包括SRMOS，电感器和控制电路的整流装置。 SRMOS有一个门，一个排水沟和一个源头。 SRMOS的门连接到控制电路的输出。 电感连接到SRMOS的漏极。 控制电路使用两条感测迹线来确定电感器（连接到漏极）和SRMOS源之间的电压（或电流）。 在感测到正向特性（电压或电流）时，SRMOS向前偏置以允许电流流过SRMOS。 在感测到反向特性（电压或电流）时，SRMOS反向偏置以切断任何电流。 迟滞用于设置SRMOS的正向偏置阈值电压和反向偏置阈值电压。 在反向偏置和向前偏置SRMOS时，Vgs被控制（或弯曲），以避免SRMOS的错误打开/关闭。

公开(公告)号：US6055170A

公开(公告)日：2000-04-25

申请号：US42208

申请日：1998-03-13

申请人： H. P. Yee

发明人： H. P. Yee

IPC分类号： H02M7/21 ,  H02M3/00 ,  H02M3/158 ,  H02M3/335 ,  H02M7/217

CPC分类号： H02M3/1588 ,  H02M3/33592 ,  Y02B70/1466 ,  Y02B70/1475

摘要： Circuits and methods are provided for operating a transistor as rectifier based upon the detected Vds of the transistor. In sensing the Vds voltage of the SRMOS, during positive conduction, the SRMOS body diode will conduct and the Vds of the SRMOS becomes that of a forward body diode voltage, which may, depending on the type of the device, be approximately -0.6V. If this voltage level is sensed, it may indicates that the SRMOS is turned off too early. During reverse conduction, Vds is non-existent (which is similar to a diode). In this case, the SRMOS may be turned off too late. Thus, by examining Vds, the SRMOS can be operated in such a manner so that it is turned off at an optimal point in time.

摘要翻译： 提供电路和方法，用于基于所检测的晶体管的Vds来操作晶体管作为整流器。 在感测SRMOS的Vds电压时，在正传导期间，SRMOS体二极管将导通，SRMOS的Vds变为正体二极管电压的Vds，这可能取决于器件的类型约为-0.6V 。 如果感测到该电压电平，则可能表明SRMOS过早关闭。 在反向传导期间，Vds不存在（其类似于二极管）。 在这种情况下，SRMOS可能被关闭太晚。 因此，通过检查Vds，SRMOS可以以这样的方式操作，使得它在最佳时间点被关闭。

公开(公告)号：US20070271047A1

公开(公告)日：2007-11-22

申请号：US11434771

申请日：2006-05-17

申请人： Allen Y. Tan ,  H. P. Yee

发明人： Allen Y. Tan ,  H. P. Yee

IPC分类号： G06F19/00

CPC分类号： H02M1/4208 ,  Y02B70/126 ,  Y02P80/112

摘要： A method of power factor correction is disclosed. The method uses the slope of the voltage waveform to determine the phase angle of the voltage. Based on the phase angle, a current waveform is generated that is in phase with the voltage. The slope of the voltage signal is calculated as the derivative of voltage with respect to time. The resultant current signal is in ratio with the voltage signal. Additionally, the current signal has zero or near zero phase displacement with respect to the voltage signal. Repeatedly performing the steps of the method allows a continuous current signal to be provided. As load characteristics change, the method quickly adapts the power to compensate. As a result, reliable and effective power factor correction is achieved.

摘要翻译： 公开了一种功率因数校正方法。 该方法使用电压波形的斜率来确定电压的相位角。 基于相位角，产生与电压同相的电流波形。 电压信号的斜率计算为电压相对于时间的导数。 所得到的电流信号与电压信号成比例。 此外，电流信号相对于电压信号具有零或接近零相位移。 重复地执行该方法的步骤允许提供连续电流信号。 随着负载特性的变化，该方法快速适应功率补偿。 结果，实现了可靠和有效的功率因数校正。