公开(公告)号：EP2169816A1

公开(公告)日：2010-03-31

申请号：EP09168772.3

申请日：2009-08-27

申请人： Osram Gesellschaft mit beschränkter Haftung

发明人： Li, Shangbin ,  MA, Changsong

IPC分类号： H02M1/36 ,  H02M1/42

CPC分类号： H02M1/36 ,  H02M1/4225 ,  H02M2001/0006 ,  H05B41/2824 ,  Y02B20/186 ,  Y02B70/126

摘要： The present invention provides a startup circuit for a power factor correction controller chip (U1), which includes a rectification circuit (D1,D2,D3,D4) and a charge pump circuit (C2,R5,D7,C5). The output of the rectification circuit is connected to the supply voltage pin (Vcc) of the chip (U1) through a startup resistor (R1), and the output of the charge pump circuit is connected with the supply voltage pin (Vcc) of the chip (U1). The startup circuit includes a first current path (Q1,D5) and a second current path (R2,Q2), wherein an input of the first current path is connected with the startup resistor (R1), and an output thereof is connected with the supply voltage pin (Vcc) of the chip; an input of the second current path is connected with the startup resistor (R1), and an output thereof is connected with a ground potential. When the power is turned on, the first current path is ON, and the second current path is OFF. When the PFC controller chip works normally, the first current path is OFF, and the second current path is ON.

摘要翻译： 本发明提供了一种用于功率因数校正控制器芯片（U1）的启动电路，其包括整流电路（D1，D2，D3，D4）和电荷泵电路（C2，R5，D7，C5）。 整流电路的输出通过启动电阻（R1）连接到芯片（U1）的电源电压引脚（Vcc），电荷泵电路的输出端与电源电压引脚（Vcc）连接， 芯片（U1）。 启动电路包括第一电流路径（Q1，D5）和第二电流路径（R2，Q2），其中第一电流路径的输入与启动电阻器（R1）连接，并且其输出端与 电源电压引脚（Vcc）; 第二电流路径的输入与启动电阻（R1）连接，其输出与地电位连接。 当电源接通时，第一电流路径为ON，第二电流路径为OFF。 当PFC控制器芯片工作正常时，第一个电流路径为OFF，第二个电流路径为ON。