Patent ID: 6373671
Filing Date: 2002-04-16
Classification: H03K

Abstract:
An apparatus with an over-current shutdown means and an over-temperature shutdown means, comprising:a power element for maintaining operating continuity or causing a shutdown of a power supply to a load which is mounted on a vehicle; a current detection means for detecting a value of a current which flows in said power element; a current-voltage converting means for converting said detected current value to a voltage signal; a temperature detection means for detecting a quantity of heat generated by said power element and for varying one of said voltage signal and said current value in response to said quantity of heat generated by said power element; a latch means for maintaining a predetermined condition of said power element in response to an output from said current detection means and said temperature detection means; a return pulse generator for generating a return pulse so as to return said latch means to an initial condition; and a continuity and shutdown control means for maintaining said operating continuity or causing a shutdown of said power element in response to said output of said latch means.