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1. 发明公开

KR1020090113174A 부하구동장치 失效
标题翻译：负载驱动装置
公开(公告)号：KR1020090113174A
公开(公告)日：2009-10-29
申请号：KR1020087031999
申请日：2007-06-21
申请人： 산켄덴키 가부시키가이샤
发明人： 가토유지 , 세키구치게이이치 , 사토기요카쓰
IPC分类号： H02M1/36 , H02H7/12
CPC分类号： H03K17/0822 , H03K2017/0806
摘要： A load drive device includes: a switching element (3) connected in series to a DC power source (Vcc) and a load (4); a drive circuit (5) which generates a control signal for performing ON/OFF control of the switching element (3); a temperature detection element (6) which detects the temperature of the switching element (3); an overheat protection circuit (7) which generates an overheat detection signal when the temperature detection element (6) has detected a temperature above a predetermined value; and a disconnection detection circuit (11) having a current mirror circuit (12) connected to one and the other terminal of the temperature detection element (6) and detecting a disconnection between the temperature detection element (6) and the overheat protection circuit (7). If the overheat protection circuit (7) generates an overheat detection signal or if the disconnection detection circuit (11) detects a disconnection between the temperature detection element (6) and the overheat protection circuit (7), the control signal from the drive circuit (5) to the switching element (3) is stopped. Thus, when a disconnection is caused in wiring between the temperature detection circuit and the overheat protection circuit, it is possible to prevent thermal breakage of the switching element used in the load drive circuit.
摘要翻译：负载驱动装置包括：串联连接到DC电源（Vcc）和负载（4）的开关元件（3）; 驱动电路（5），其产生用于进行所述开关元件（3）的接通/断开控制的控制信号; 温度检测元件（6），其检测所述开关元件（3）的温度; 过热保护电路（7），当所述温度检测元件（6）检测到高于预定值的温度时，产生过热检测信号; 以及断开检测电路（11），其具有连接到温度检测元件（6）的一端和另一端的电流镜电路（12），并检测温度检测元件（6）与过热保护电路（7）之间的断开）。如果过热保护电路（7）产生过热检测信号，或者断路检测电路（11）检测到温度检测元件（6）与过热保护电路（7）之间的断开，则来自驱动电路 5）到开关元件（3）停止。因此，当在温度检测电路和过热保护电路之间的布线中导致断线时，可以防止负载驱动电路中使用的开关元件的热断裂。

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