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公开(公告)号：US20180013357A1
公开(公告)日：2018-01-11
申请号：US15657371
申请日：2017-07-24
Applicant: OSRAM SYLVANIA Inc.
Inventor： Fred Palmer
CPC classification number: H02M7/06 , H02M1/42 , H02M1/4208 , H02M3/1582 , H02M7/2176 , H02M2001/4275 , H05B33/0815 , H05B33/0848 , H05B33/0896 , Y02B20/347
Abstract: A solid state light source driver circuit that operates in either a buck convertor or a boost convertor configuration is provided. The driver circuit includes a controller, a boost switch circuit and a buck switch circuit, each coupled to the controller, and a feedback circuit, coupled to the light source. The feedback circuit provides feedback to the controller, representing a DC output of the driver circuit. The controller controls the boost switch circuit and the buck switch circuit in response to the feedback signal, to regulate current to the light source. The controller places the driver circuit in its boost converter configuration when the DC output is less than a rectified AC voltage coupled to the driver circuit at an input node. The controller places the driver circuit in its buck converter configuration when the DC output is greater than the rectified AC voltage at the input node.
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公开(公告)号：US20140091724A1
公开(公告)日：2014-04-03
申请号：US13629710
申请日：2012-09-28
Applicant: OSRAM SYLVANIA INC.
Inventor： Fred Palmer
CPC classification number: H02M7/06 , H02M1/42 , H02M1/4208 , H02M3/1582 , H02M2001/4275 , H05B33/0815 , H05B33/0848 , H05B33/0896
Abstract: A solid state light source driver circuit that operates in either a buck convertor or a boost convertor configuration is provided. The driver circuit includes a controller, a boost switch circuit and a buck switch circuit, each coupled to the controller, and a feedback circuit, coupled to the light source. The feedback circuit provides feedback to the controller, representing a DC output of the driver circuit. The controller controls the boost switch circuit and the buck switch circuit in response to the feedback signal, to regulate current to the light source. The controller places the driver circuit in its boost converter configuration when the DC output is less than a rectified AC voltage coupled to the driver circuit at an input node. The controller places the driver circuit in its buck converter configuration when the DC output is greater than the rectified AC voltage at the input node.
Abstract translation: 提供了在降压转换器或升压转换器配置中操作的固态光源驱动器电路。 驱动器电路包括耦合到控制器的控制器，升压开关电路和降压开关电路，以及耦合到光源的反馈电路。 反馈电路向控制器提供表示驱动器电路的直流输出的反馈。 控制器根据反馈信号控制升压开关电路和降压开关电路，调节到光源的电流。 当DC输出小于在输入节点处耦合到驱动器电路的整流AC电压时，控制器将驱动器电路放置在升压转换器配置中。 当直流输出大于输入节点处的整流交流电压时，控制器将驱动电路置于降压转换器配置中。
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公开(公告)号：US09748858B2
公开(公告)日：2017-08-29
申请号：US13629710
申请日：2012-09-28
Applicant: OSRAM SYLVANIA Inc.
Inventor： Fred Palmer
CPC classification number: H02M7/06 , H02M1/42 , H02M1/4208 , H02M3/1582 , H02M2001/4275 , H05B33/0815 , H05B33/0848 , H05B33/0896
Abstract: A solid state light source driver circuit that operates in either a buck convertor or a boost convertor configuration is provided. The driver circuit includes a controller, a boost switch circuit and a buck switch circuit, each coupled to the controller, and a feedback circuit, coupled to the light source. The feedback circuit provides feedback to the controller, representing a DC output of the driver circuit. The controller controls the boost switch circuit and the buck switch circuit in response to the feedback signal, to regulate current to the light source. The controller places the driver circuit in its boost converter configuration when the DC output is less than a rectified AC voltage coupled to the driver circuit at an input node. The controller places the driver circuit in its buck converter configuration when the DC output is greater than the rectified AC voltage at the input node.
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