公开(公告)号：US20160049865A1

公开(公告)日：2016-02-18

申请号：US14809699

申请日：2015-07-27

Applicant: Richtek Technology Corp.

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

IPC: H02M1/36 ,  H02M3/335

CPC classification number: H02M1/36 ,  H02M3/33507 ,  H02M2001/327

Abstract: A fast start-up circuit and a method of a flyback power supply utilize a charging current that is related to an input voltage of the flyback power supply to charge a control terminal of a power switch of the flyback power supply during a start-up mode. Accordingly, the power switch can be switched, and a supply voltage of the flyback power supply rises. When an output terminal of the flyback power supply occurs a short circuit, the fast start-up circuit and the method of the present invention will decrease a maximum of a current through the power switch, thereby avoiding that the power switch is overheating.

Abstract translation: 快速启动电路和回扫电源的方法利用与回扫电源的输入电压相关的充电电流，以在启动模式期间对反激式电源的电源开关的控制端子充电 。 因此，可以切换电源开关，并且回扫电源的电源电压上升。 当回扫电源的输出端子发生短路时，快速启动电路和本发明的方法将减小通过电源开关的电流的最大值，从而避免电源开关过热。

公开(公告)号：US20150048750A1

公开(公告)日：2015-02-19

申请号：US14334574

申请日：2014-07-17

Applicant: RICHTEK TECHNOLOGY CORP.

Inventor： Tong-Cheng JAO ,  Yi-Wei LEE ,  Isaac Y. CHEN

IPC: H05B33/08 ,  H02M7/217

CPC classification number: H05B33/0815 ,  H02M7/2176 ,  H02M2001/0045 ,  H05B33/0812 ,  Y02B20/343 ,  Y02B20/345 ,  Y02B20/346 ,  Y02B20/347

Abstract: A light emitting system includes a series connection of a light emitting unit and a variable current source, and a voltage conversion device that includes a rectifier circuit and an output circuit. The rectifier circuit rectifies an AC voltage to generate a rectified voltage across a first rectifier output coupled to one end of the series connection of the light emitting unit and the variable current source, and a second rectifier output. The output circuit is coupled between the second rectifier output and another end of the series connection of the light emitting unit and the variable current source, and is configured to generate a direct-current (DC) output voltage.

Abstract translation: 发光系统包括发光单元和可变电流源的串联连接，以及包括整流电路和输出电路的电压转换装置。 整流电路对AC电压进行整流，以在耦合到发光单元和可变电流源的串联连接的一端的第一整流器输出和第二整流器输出之间产生整流电压。 输出电路耦合在第二整流器输出和发光单元与可变电流源的串联连接的另一端之间，并被配置为产生直流（DC）输出电压。