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公开(公告)号：US20130094250A1
公开(公告)日：2013-04-18
申请号：US13709106
申请日：2012-12-10
Applicant: Minebea Co., Ltd.
Inventor： Robert Weger , Mykhaylo Raykhman
IPC: H02M3/335
CPC classification number: H02M3/33523 , H02M1/42 , H02M3/158 , H02M3/33569
Abstract: A down converter for converting an input DC voltage (Vin) into a lower output DC voltage (Vout). The down converter has on the primary side (2) an LC series resonance circuit (4) that can be connected via a first switch (S1) to the input voltage (Vin) and via a second switch (S2) to ground. On the secondary side (3), an output switch (S3) and an output capacitor (C) are each connected in parallel to the DC voltage output (Vout) and connected to each other through an inductor (L). The output switch (S3) is connected via a diode (Dr) to the input voltage (Vin) so as to divert voltage overshoots.
Abstract translation: 用于将输入直流电压（Vin）转换为较低输出直流电压（Vout）的下变频器。 降压转换器在初级侧（2）上可以通过第一开关（S1）连接到输入电压（Vin）并且经由第二开关（S2）连接到地的LC串联谐振电路（4）。 在次级侧（3）上，输出开关（S3）和输出电容器（C）分别与直流电压输出（Vout）并联连接，并通过电感器（L）彼此连接。 输出开关（S3）通过二极管（Dr）连接到输入电压（Vin），以转移电压过冲。
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公开(公告)号：US09313837B2
公开(公告)日：2016-04-12
申请号：US13858512
申请日：2013-04-08
Applicant: Minebea Co., Ltd.
Inventor： Robert Weger , Mykhaylo Raykhman
CPC classification number: H05B33/0806 , H05B33/0815 , H05B33/0827 , Y02B20/348
Abstract: The invention describes a control circuit for backlighting having a plurality of control channels in each of which a light emitting diode string is controlled. The control circuit has a balancing device for balancing the currents in the individual control channels, and a control unit that is connected to a power factor correction circuit (PFC), to a bridge circuit and to a primary-side current measuring device. Each control channel has a switch for switching the light emitting diode string that is connected to a separate dimming signal. The control circuit furthermore has at least one smoothing capacitor and one current limiter that limits the charging current for the smoothing capacitor. The control unit is additionally designed such that if all the dimming signals are logical ON, the output voltage of the PFC is regulated with the aid of the current measuring device such that the current on the primary side corresponds to a pre-determined setpoint value and that as soon as at least one dimming signal is logical OFF, the output voltage of the PFC is kept constant at its last value (FIG. 4).
Abstract translation: 本发明描述了一种用于背光的控制电路，其具有控制发光二极管串的每一个中的多个控制通道。 控制电路具有用于平衡各个控制通道中的电流的平衡装置和连接到功率因数校正电路（PFC）的控制单元，桥接电路和初级侧电流测量装置。 每个控制通道具有用于切换连接到单独的调光信号的发光二极管串的开关。 控制电路还具有至少一个平滑电容器和限制平滑电容器的充电电流的一个限流器。 控制单元被额外地设计成使得如果所有调光信号都是逻辑ON，则PFC的输出电压借助于电流测量装置被调节，使得初级侧的电流对应于预定的设定点值，并且 一旦至少一个调光信号为逻辑关闭，则PFC的输出电压保持恒定在其最后的值（图4）。
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公开(公告)号：US09154040B2
公开(公告)日：2015-10-06
申请号：US13709106
申请日：2012-12-10
Applicant: Minebea Co., Ltd
Inventor： Robert Weger , Mykhaylo Raykhman
CPC classification number: H02M3/33523 , H02M1/42 , H02M3/158 , H02M3/33569
Abstract: A down converter for converting an input DC voltage (Vin) into a lower output DC voltage (Vout). The down converter has on the primary side (2) an LC series resonance circuit (4) that can be connected via a first switch (S1) to the input voltage (Vin) and via a second switch (S2) to ground. On the secondary side (3), an output switch (S3) and an output capacitor (C) are each connected in parallel to the DC voltage output (Vout) and connected to each other through an inductor (L). The output switch (S3) is connected via a diode (Dr) to the input voltage (Vin) so as to divert voltage overshoots.
Abstract translation: 用于将输入直流电压（Vin）转换为较低输出直流电压（Vout）的下变频器。 降压转换器在初级侧（2）上可以通过第一开关（S1）连接到输入电压（Vin）并且经由第二开关（S2）连接到地的LC串联谐振电路（4）。 在次级侧（3）上，输出开关（S3）和输出电容器（C）分别与直流电压输出（Vout）并联连接，并通过电感器（L）彼此连接。 输出开关（S3）通过二极管（Dr）连接到输入电压（Vin），以转移电压过冲。
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