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公开(公告)号：US20150117072A1
公开(公告)日：2015-04-30
申请号：US14526187
申请日：2014-10-28
Applicant: Richtek Technology Corp.
Inventor： Tong-Cheng Jao , Yi-Wei Lee , Isaac Y. Chen
IPC: H02M3/335
CPC classification number: H02M1/36 , H02M3/33507 , H02M3/33523 , H02M3/33553
Abstract: A soft-start switching power converter includes a voltage converting circuit and a soft-start circuit. The voltage converting circuit includes a transformer, and a first switch which includes a first terminal connected to the transformer, a second terminal providing a trigger signal, and a control terminal receiving a control signal, and which is controlled to switch between conduction and nonconduction, such that the transformer generates a feedback voltage. The soft-start circuit receives the trigger signal, generates the control signal according to the trigger signal, and determines whether or not to clamp the control signal at a preset voltage level based on the trigger signal.
Abstract translation: 软启动开关电源转换器包括电压转换电路和软启动电路。 电压转换电路包括变压器和第一开关，其包括连接到变压器的第一端子，提供触发信号的第二端子和接收控制信号的控制端子，并且被控制为在导通和非导通之间切换， 使得变压器产生反馈电压。 软启动电路接收触发信号，根据触发信号产生控制信号，并根据触发信号确定是否将控制信号钳位在预设电压电平。
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公开(公告)号：US09258857B2
公开(公告)日：2016-02-09
申请号：US14334574
申请日：2014-07-17
Applicant: RICHTEK TECHNOLOGY CORP.
Inventor： Tong-Cheng Jao , Yi-Wei Lee , Isaac Y. Chen
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。
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公开(公告)号：US09647531B2
公开(公告)日：2017-05-09
申请号：US14526187
申请日：2014-10-28
Applicant: Richtek Technology Corp.
Inventor： Tong-Cheng Jao , Yi-Wei Lee , Isaac Y. Chen
CPC classification number: H02M1/36 , H02M3/33507 , H02M3/33523 , H02M3/33553
Abstract: A soft-start switching power converter includes a voltage converting circuit and a soft-start circuit. The voltage converting circuit includes a transformer, and a first switch which includes a first terminal connected to the transformer, a second terminal providing a trigger signal, and a control terminal receiving a control signal, and which is controlled to switch between conduction and nonconduction, such that the transformer generates a feedback voltage. The soft-start circuit receives the trigger signal, generates the control signal according to the trigger signal, and determines whether or not to clamp the control signal at a preset voltage level based on the trigger signal.
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