| 摘要 |
The circuit comprises a multi-source powerFET (Tr5) inserted in a main current path. A current detection circuit (11) detects a current passing through the main current path using a reference current path of the multi-source powerFET. The current detector circuit (11) can be set for transient component mode (Tr1,R7) in synchronism with an input signal (ON) and for a mode where transient components of the reference current are caused by load fluctuations. A comparator (CMP1) compares the voltage drop across the main current path of the powerFET with the voltage drop across the reference current path of the powerFET. Each interruption of the load current in response to an overcurrent detection is followed by a subsequent reinitiation. After a predetermined number of reinitiations, current is permanently stopped from flowing through the powerFET. <IMAGE> |
