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1. 发明公开

EP2365346A2 Switching power supply 有权转让
标题翻译：开关电源
公开(公告)号：EP2365346A2
公开(公告)日：2011-09-14
申请号：EP11153136.4
申请日：2011-02-03
申请人： Omron Co., Ltd.
发明人： Marumo, Katsuya , Hosomi, Shinichi
IPC分类号： G01R19/165 , G01R31/40 , H02M7/155
CPC分类号： H02M3/33507 , H02M1/36 , H02M2001/0006
摘要： A switching power supply includes a first auxiliary power supply (30) for causing a first auxiliary winding (N3) of a transformer to induce voltage by ON/OFF control of a switching element (S1) connected to a primary winding (N1) of the transformer. The voltage induced by the first auxiliary winding (N3) charges a capacitor in the first auxiliary power supply. The switching power supply also includes a control circuit (40) for starting and stopping the ON/OFF control of the switching element (S1) by comparing a voltage of the capacitor (C5) with a first threshold value, an activation circuit (20) for charging the capacitor (C5) with voltage from the power supply input to the switching power supply; and a determination unit (50) for determining a lifespan of the switching power supply based on the voltage of the capacitor (C5) after the voltage of the capacitor (C5) becomes greater than or equal to the first threshold values.
摘要翻译：开关电源包括：第一辅助电源（30），用于通过对连接到第一辅助绕组（N3）的开关元件（S1）的开/关控制使变压器的第一辅助绕组（N3）变压器。由第一辅助绕组（N3）感应的电压对第一辅助电源中的电容器充电。开关电源还包括用于通过比较电容器（C5）的电压和第一阈值来启动和停止开关元件（S1）的接通/断开控制的控制电路（40），激活电路（20）用于利用来自所述电源输入端的电压向所述开关电源对所述电容器（C5）充电; 以及确定单元（50），用于在电容器（C5）的电压变得大于或等于第一阈值之后，基于电容器（C5）的电压来确定开关电源的寿命。

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