公开(公告)号：US20160219662A1

公开(公告)日：2016-07-28

申请号：US15008289

申请日：2016-01-27

Applicant: Richtek Technology Corporation

Inventor： Jyun-Che HO ,  Isaac Y. CHEN ,  Yi-Wei LEE

IPC: H05B33/08

CPC classification number: H05B33/0815 ,  H05B33/0848

Abstract: A control circuit of a LED driver utilizes a counter to acquire a cycle and a conduction time or a non-conduction time of an AC phase-cut voltage outputted by a TRIAC dimmer. A bleeding signal is determined according to the cycle and the conduction time or the non-conduction time and used for adjusting a bleeding current so as to avoid a flickering of the LED. The control circuit does not need extra pins for coupling a large capacitor, but the bleeding signal can be still acquired. Preferably, the present invention is suitable for an IC of low pin numbers.

Abstract translation: LED驱动器的控制电路利用计数器来获取由TRIAC调光器输出的AC相切电压的周期和导通时间或非导通时间。 根据循环和导通时间或非导通时间确定出血信号，并用于调节出血电流，以避免LED的闪烁。 控制电路不需要用于耦合大电容器的额外引脚，但仍可获取出血信号。 优选地，本发明适用于低引脚数的IC。

公开(公告)号：US20130176758A1

公开(公告)日：2013-07-11

申请号：US13735652

申请日：2013-01-07

Applicant: Richtek Technology Corporation

Inventor： Pei-Kai TSENG ,  Jyun-Che HO ,  Chien-Fu TANG ,  Isaac Y. CHEN

IPC: H02M7/219

CPC classification number: H02M7/219 ,  H02M2007/2195 ,  Y02B70/1408

Abstract: A bridge rectifier is established by MOSFETs instead of diodes. The MOSFET bridge rectifier includes a voltage detector to detect the voltages of two AC input terminals of the MOSFET bridge rectifier, for identifying the positive and negative half cycles of an AC voltage input to the MOSFET bridge rectifier, thereby accurately controlling the MOSFETs.

Abstract translation: 由MOSFET代替二极管建立桥式整流器。 MOSFET桥式整流器包括用于检测MOSFET桥式整流器的两个AC输入端子的电压的电压检测器，用于识别输入到MOSFET桥式整流器的AC电压的正半周期和负半周期，从而精确地控制MOSFET。

公开(公告)号：US20160308449A1

公开(公告)日：2016-10-20

申请号：US15192187

申请日：2016-06-24

Applicant: Richtek Technology Corporation

Inventor： Jiun-Hung PAN ,  Chien-Fu TANG ,  Jyun-Che HO ,  Isaac Y. CHEN ,  Yu-Chang CHEN ,  Jung-Pei CHENG

IPC: H02M3/335 ,  H02M1/08

CPC classification number: H02M3/33507 ,  H02M1/08 ,  H02M3/156 ,  H02M3/157 ,  H02M3/33515 ,  H02M3/33523 ,  H02M7/217 ,  H02M2001/0009

Abstract: An AC-to-DC power converter with a BJT as a power switch can set a base current of the BJT by a current setting resistor which is in the outside of a control integrated circuit. Since an output current and a recovery current of the BJT are injected into a sensing resistor, the AC-to-DC power converter can correctly detect an inductor current thereof from the sensing resistor.

Abstract translation: 具有BJT作为电源开关的AC至DC电力转换器可以通过位于控制集成电路外部的电流设定电阻来设定BJT的基极电流。 由于BJT的输出电流和恢复电流被注入到感测电阻器中，所以AC到DC功率转换器可以从感测电阻器正确地检测其电感电流。

公开(公告)号：US20140117947A1

公开(公告)日：2014-05-01

申请号：US14061317

申请日：2013-10-23

Applicant: Richtek Technology Corporation

Inventor： Yung-Chih LAI ,  Jyun-Che HO ,  Isaac Y. CHEN

IPC: H02M1/42 ,  H03K23/00

CPC classification number: H02M1/42 ,  H02M1/4225 ,  H03K21/38 ,  H03K23/00 ,  Y02B70/12 ,  Y02B70/126 ,  Y02P80/112

Abstract: A control integrated circuit for a power factor correction converter has a pin for detecting an alternating-current information and a direct-current information of an input signal. The control integrated circuit comprises a signal peak detector for detecting a peak value of the input signal to the pin to obtain the direct-current information of the input signal. Since the alternating-current information and the direct-current information of the input signal can be obtained through the same pin, the pin count of the control integrated circuit can be decreased.

Abstract translation: 用于功率因数校正转换器的控制集成电路具有用于检测交流信息和输入信号的直流信息的引脚。 控制集成电路包括信号峰值检测器，用于检测针对输入信号的峰值，以获得输入信号的直流信息。 由于可以通过相同的引脚获得输入信号的交流信息和直流信息，所以可以减小控制集成电路的引脚数。