Provided are an overcurrent protection device and an overcurrent protection system which can provide time differences among the timings for executing the retry operations among a plurality of overcurrent protection devices connected to a common power supply. When a battery voltage (VBA) becomes a value equal to or lower than a threshold voltage after an FET (Q1) of an IC circuit (51-1) is turned on, all FETs (Q1) of the respective IC circuits are turned off, and a time until the battery voltage (VBA) reduces to a value lower than a threshold voltage after the turning-on of the FET (Q1) is clocked. When the time is smaller than 400 µsec, the count value N is incremented. Further, turning-on of the FETs (Q1) is repeated after the lapse of the standby time (Tp) set randomly. When the count value N reaches 7, the FET (Q1) of the IC circuit 51-1 is held in the turned-off state. Accordingly, only the load-driving circuit at which the dead short occurs can be stopped and the driving of the other load-driving circuits can be continued.
OVERCURRENT PROTECTION DEVICE AND OVERCURRENT PROTECTION SYSTEM
ÜBERSTROMSCHUTZVORRICHTUNG UND ÜBERSTROMSCHUTZSYSTEM
DISPOSITIF DE PROTECTION CONTRE LES SURINTENSITÉS, ET SYSTÈME DE PROTECTION CONTRE LES SURINTENSITÉS
07.09.2016
Patent
Elektronische Ressource
Englisch
Overcurrent protection device, overcurrent protection method, and non-transitory medium
Europäisches Patentamt | 2016
|