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2. 发明公开

EP1769974A1 Power switch circuit for driving an airbag squib module 有权
标题翻译： LeistungsschaltkreisfüreineAirbagzündpille
公开(公告)号：EP1769974A1
公开(公告)日：2007-04-04
申请号：EP05021518.5
申请日：2005-09-30
申请人： Infineon Technologies AG
发明人： Glaeser, Joachim , Piccolella, Salvatore , Flore, Alberto , Macri, Nicola , Lenz, Michael , Chiozzi, Giorgio , Gola, Alberto
IPC分类号： B60R21/01 , H03K17/041
CPC分类号： H03K17/04106 , Y10T307/799
摘要： A power switch circuit for driving an airbag squib module comprises a power transistor (110), a pre-charge capacitance (120) for storing a charge, a charging circuit (140) and a controllable energy-coupling element. The power transistor (110) has a first electrode (E1), a second electrode (E2) and a control electrode. A path between the first electrode (E1) and the second electrode (E2) is connected in series with the airbag squib module (120) between a supply potential (V SUP ) and a reference potential (V REF ). The charging circuit (140) charges the pre-charge capacitance (130) and the charging circuit (140) is therefore coupled with the pre-charged capacitance (130). The controllable energy coupling element (134) is connected between a first electrode of the pre-charge capacitance (130) and the control electrode (control) of the power transistor (110). The inventive power switch exhibits a high degree of stability, allows a fast switching of the power transistor (110) and further comprises an advantageous transient response.
摘要翻译：用于驱动气囊爆管模块的电源开关电路包括功率晶体管（110），用于存储电荷的预充电电容（120），充电电路（140）和可控能量耦合元件。功率晶体管（110）具有第一电极（E1），第二电极（E2）和控制电极。第一电极（E1）和第二电极（E2）之间的路径与电源电位（V SUP）和参考电位（V REF）之间的气囊点火组件（120）串联连接。充电电路（140）对预充电电容（130）充电，因此充电电路（140）与预充电电容（130）耦合。可控能量耦合元件（134）连接在预充电电容（130）的第一电极和功率晶体管（110）的控制电极（控制）之间。本发明的功率开关表现出高度的稳定性，允许功率晶体管（110）的快速切换，并且还包括有利的瞬态响应。

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