In-Vehicle Power Supply Apparatus

摘要

An in-vehicle power supply apparatus for supplying operating power to a microcomputer is configured such that the microcomputer can securely enter into a standby state in a case where a voltage supplied from an in-vehicle power source is interrupted. The in-vehicle power supply apparatus according to the invention generates a second voltage to be supplied to a control IC and the like other than the microcomputer and a third voltage to be supplied to the microcomputer, and, in a case where the second voltage is reduced, the in-vehicle power supply apparatus transmits a reset signal and bypasses the second voltage to an input of the third voltage.

主权项

1. An in-vehicle power supply apparatus, comprising.
a second voltage generation section for generating a second voltage with the use of a voltage supplied from an in-vehicle power source; a third voltage generation section for generating a third voltage with The use of the voltage supplied from the in-vehicle power source and supplying the third voltage to a microcomputer; and a capacitor connected with an output side of the second voltage generation section, wherein in a case where a voltage applied to the second voltage generation section is reduced, the second voltage generation section supplies an electric charge accumulated in the capacitor to an input side of the third voltage generation section by forming a path for feeding back a current from the output side to an input side of the second voltage generation section.