公开(公告)号：EP3317956A1

公开(公告)日：2018-05-09

申请号：EP16734609.7

申请日：2016-06-29

申请人： Philips Lighting Holding B.V.

发明人： ZHANG, Xianhui ,  LI, Ken, K ,  CHEN, Zhi, Quan ,  LIU, Junhu ,  LONG, Huojun ,  LI, Ace

IPC分类号： H02M3/156 ,  H05B33/08 ,  H02M1/42

CPC分类号： H02M3/156 ,  H02M1/4225 ,  H02M3/3385 ,  H05B33/0815 ,  H05B37/02 ,  Y02B20/347 ,  Y02B20/348 ,  Y02B70/126

摘要： The invention provides a power converter comprising: an input for receiving input power with a variable nominal mains level, wherein said variable nominal mains level falls within at least 90V to 240V; a main power switch (Q1) driven by the input power, and a control circuit (Q2, Q3) for controlling a control current of the main power switch (Q1), wherein the control circuit in (Q2, Q3) is adapted to sense the level of the input power and draw current from a control terminal of the power switch (Q1) according to the level, and said control circuit is adapted to operate in linear region and increase the drawn current along with the increase of the level throughout the variable nominal mains level of the input power, wherein the control circuit comprises: a Darlington bridge with a first transistor (Q2) and a second transistor (Q3), the first transistor (Q2) with a base terminal connected to a circuit position indicative of the voltage amplitude of the input power, the second transistor (Q3) with a base terminal connected to an emitter terminal of the first transistor (Q2) and a collector terminal connected to the control terminal of the main power switch (Q1) and a collector terminal of the first transistor (Q2); and a resistor network (R3, R7) coupled to the emitter of the second transistor (Q3) for regulating the amplification of the second transistor (Q3) and keep the second transistor (Q3) working at linear region throughout the variable nominal mains level of the input power.

公开(公告)号：EP3150026A1

公开(公告)日：2017-04-05

申请号：EP15723489.9

申请日：2015-05-13

申请人： Philips Lighting Holding B.V.

发明人： LONG, Huojun ,  TOMAR, Akhilesh Singh ,  FU, Jie ,  KONG, Jianhong ,  SUN, Xiao

IPC分类号： H05B33/08

摘要： A driver circuit, comprising: an input for receiving an input power; an input capacitor (C2) for buffering the input power; a switched mode power converter for supplying a driving current from the buffered input power; a current limiter coupled to the switched mode power converter, wherein the current is configured to control the switched mode power converter to limit the driving current at a driving load limit, wherein the current limiter comprises a controllable switch (Q3) configured to control the switched mode power converter; and a control element (301) configured to sense a variation of the input power, the control element coupled to the controllable switch and adjusting the controllable switch based on the variation of the input power, such that the current limiter is configured to adjust the driving load limit based on the variation of the input power, wherein said control element comprises: a current sensing element (R1) in series in the line between the input capacitor (C2) and the input.

摘要翻译： 一种驱动器电路，包括：用于接收输入电力的输入; 用于缓冲输入功率的输入电容器（C2）; 开关模式功率转换器，用于从缓冲输入功率提供驱动电流; 耦合到开关模式功率转换器的限流器，其中所述限流器被配置为控制所述开关模式功率转换器以限制驱动负载极限处的驱动电流，其中所述限流器包括可控开关（Q3），所述可控开关被配置为控制 开关电源转换器; 以及控制元件（301），被配置为感测输入功率的变化，所述控制元件耦合到所述可控开关并且基于所述输入功率的变化来调节所述可控开关，使得所述限流器被配置为调整所述驱动 基于输入功率的变化的负载极限，其中所述控制元件包括：串联在输入电容器（C2）和输入之间的线路中的电流感测元件（R1）。

公开(公告)号：EP3440894A1

公开(公告)日：2019-02-13

申请号：EP17714252.8

申请日：2017-04-04

申请人： Philips Lighting Holding B.V.

发明人： TAO, Haimin ,  WANG, Yi ,  LONG, Huojun

IPC分类号： H05B33/08 ,  F21K9/27

摘要： The invention provides a solid state (e.g. LED) tubular lighting device having pin safety circuits connected to connecting pins at each end. A driver circuit is connected to the outputs of the pin safety circuits. The pin safety circuits each comprise a TRIAC switch which is adapted to form a closed switch in response to a voltage between the connecting pins. This provides a pin safety solution suitable at least for rapid start EM ballasts.