公开(公告)号：US20170235354A1

公开(公告)日：2017-08-17

申请号：US15385019

申请日：2016-12-20

Applicant: ALPINE ELECTRONICS, INC.

Inventor： Hideaki Sato

IPC: G06F1/28 ,  H02M3/158

CPC classification number: G06F1/28 ,  G06F1/24 ,  G06F1/30 ,  H02M3/158

Abstract: A power system includes a voltage detection IC which outputs a reset signal to a microcomputer when an input voltage is equal to or lower than a reset release voltage, releases outputting of the reset signal when the input voltage exceeds the reset release voltage, and outputs the reset signal to the microcomputer again after the input voltage exceeds the reset release voltage when the input voltage is equal to or lower than a reset detection voltage which is lower than the reset release voltage and a voltage conversion circuit which sets a first voltage associated with a change of a power voltage as the input voltage before start of operation of the microcomputer and sets a second voltage which is associated with a change of the power voltage and is lower than the first voltage as the input voltage after the start of operation the microcomputer.

公开(公告)号：US10139883B2

公开(公告)日：2018-11-27

申请号：US15385019

申请日：2016-12-20

Applicant: ALPINE ELECTRONICS, INC.

Inventor： Hideaki Sato

IPC: G06F1/28 ,  H02M3/158

Abstract: A power system includes a voltage detection IC which outputs a reset signal to a microcomputer when an input voltage is equal to or lower than a reset release voltage, releases outputting of the reset signal when the input voltage exceeds the reset release voltage, and outputs the reset signal to the microcomputer again after the input voltage exceeds the reset release voltage when the input voltage is equal to or lower than a reset detection voltage which is lower than the reset release voltage and a voltage conversion circuit which sets a first voltage associated with a change of a power voltage as the input voltage before start of operation of the microcomputer and sets a second voltage which is associated with a change of the power voltage and is lower than the first voltage as the input voltage after the start of operation the microcomputer.