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JP2004310665A - Instantaneous outage control system and electronic apparatus using instantaneous outage control system - Google Patents

Instantaneous outage control system and electronic apparatus using instantaneous outage control system Download PDF

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Publication number
JP2004310665A
JP2004310665A JP2003106481A JP2003106481A JP2004310665A JP 2004310665 A JP2004310665 A JP 2004310665A JP 2003106481 A JP2003106481 A JP 2003106481A JP 2003106481 A JP2003106481 A JP 2003106481A JP 2004310665 A JP2004310665 A JP 2004310665A
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Prior art keywords
power supply
voltage
battery
instantaneous interruption
unit
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Japanese (ja)
Inventor
Takashi Tatekawa
孝 立河
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NEC Corp
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NEC Corp
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20End-user application control systems

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  • Power Sources (AREA)
  • Stand-By Power Supply Arrangements (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To enable a normal completion process in a portable terminal or the like even when voltage drops by a steep voltage change of a battery. <P>SOLUTION: In a portable terminal or the like using a battery 109 as a power source and having a power voltage supply means 105 supplying power to a peripheral circuit 106 or the like, on condition that a power voltage is a prescribed set voltage or less over a prescribed set time, power supply to peripheral circuits 1-n from power source parts 1-n of the power voltage supply means 105 is stopped, and the power supply is changed over such that only power supply from completion-processing power source part of the power voltage supply means 105 for executing the normal completion process for an electronic apparatus is operated. By shutting off the power of the peripheral circuit unnecessary for the completion process when there is the danger of battery shutoff or instantaneous outage, current consumption is reduced to secure a time to complete the normal completion process. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【0001】
【発明が属する技術分野】
本発明は、電源の瞬断制御システムに関し、特に、主に携帯電話機等の携帯型端末(PDA)、ノートブック型のパーソナルコンピュータ(PC)などのバッテリーにより動作する電子機器において、電源電圧の瞬断を検出し制御する瞬断制御システムおよび瞬断制御システムを用いた電子機器に関する。
【0002】
【従来の技術】
携帯電話機などの携帯型端末やPDA、ノートPCなどのバッテリー動作する端末においては、表示部のバックライトの点灯、通信データの送受信など消費電流の大きな動作を行った場合にも急峻な電圧変動が起こりうる。つまり、このような電圧変動においても、電圧変動の幅が大きい、バッテリー容量が少ない、経年変化や使用頻度によりバッテリー性能が消耗している、気温が低くバッテリー性能が低下しているなどの状態にあると、装置として機能するのに必要な最低限の電圧を下回ってしまう、いわゆる瞬断に近い状態になってしまう。かかる瞬断状態になると、装置の正常な終了処理が行われず、メモリなどではデータ破壊、磁気ディスク装置ではヘッドクラッシュなどの装置破壊が起こってしまうという問題があった。
【0003】
また従来、電池等の電圧が瞬間的に低下する、いわゆる電源電圧の瞬断を検出し、データのバックアップ等の対応を行う等のための瞬断検出回路が知られている(特許文献1〜3参照)。特に、特許文献1には、駆動電源に2次電池を使用した移動電話装置等に関し、落下等の衝撃により電源電圧が数秒間程度の短時間だけ低下する、いわゆる瞬断状態を正確に検出する方法として、電池電圧監視回路により電池電圧が所定の基準値以上であるか否かを判別し、前記基準値未満である場合に、その継続時間をカウンタにより計測し、電圧の低下が瞬断であるか否かを判別する技術が記載されている。
【0004】
【特許文献1】
特開平9−305421号公報
【特許文献2】
特開2001−251783号公報
【特許文献3】
特開2002−111787号公報
【0005】
【発明が解決しようとする課題】
前述の前者の電源電圧の低下に対する問題への対策としては、通常は使用可能なバッテリー電圧の下限値を高く設定したり、バッテリーの残量を予測するなどにより、バッテリーがまだ使用可能であるにもかかわらず、使用可能とする電圧のマージンを大きくとり、早めに終了処理を行うなどの方法で問題回避を行っていた。しかしこの方法では近年の携帯電話機、PDAなどの多機能化により各機能の消費電流が増加した中での、バッテリー使用可能電圧の下限値を低くし動作可能時間を出来る限り伸ばしたいという要望と相反するものであり、また同時に複数機能を起動した場合の電圧変動の見積りが非常に難しく、正常終了処理を行っている途中で電源が落ちてしまい、データが破壊されることがあるなどの問題があった。
【0006】
また、前述の装置落下等の衝撃等による電池電源の接触不良等に起因する完全な瞬断検出を利用することが考えられるが、バッテリーの電圧変動による電圧低下に対して正常な終了処理を完了するまでの時間を確保する好適な制御システムは実現できていなかった。
【0007】
本発明の目的は、バッテリーで動作する電子機器のバッテリーの電圧変動により電圧が低下した場合においても正常な終了処理を行うことを可能にする機能を提供することにある。
本発明の目的は、主に携帯電話や携帯型端末(PDA)、ノートブック型のパーソナルコンピュータなどのバッテリーにより動作する携帯端末等において、バッテリーの電圧変動により電圧が低下した場合においても正常な終了処理を行うことを可能にする機能を提供することにある。
本発明の目的は、電子機器のバッテリー切れや瞬断の危険性がある場合に、消費電流を減少させ正常な終了処理を完了するまでの時間を確保することにある。
本発明の目的は、瞬断状態への対策のため使用電圧のマージンを減らしりバッテリー寿命を延ばすことを可能とする。
【0008】
【課題を解決するための手段】
本発明の瞬断制御システムは、電源にバッテリー(例えば図1の109)を使用し周辺回路に電源電圧を供給する電子機器の電源の瞬断制御システムであって、電源電圧が所定の設定時間以上、所定の設定電圧以下であることを条件として、前記バッテリーから周辺回路(例えば図1の106)への電源供給を停止し、電子機器の正常な終了処理を行うための電源供給(例えば図1の105の終了処理用電源部からの電源供給)のみを動作させるように電源を切り替えることを特徴とする。
【0009】
本発明の瞬断制御システムは、電源にバッテリーを使用する電子機器の電源の瞬断制御システムであって、電源電圧が所定の設定時間以上、所定の設定電圧以下であることを条件として、電子機器の正常な終了処理を行うための電源供給を別のバックアップバッテリーから行うように電源を切り替えることを特徴とし、電源電圧が電子機器の動作可能な最低動作電圧以下であることを条件として、電源を前記バックアップバッテリーに切り替えることを特徴とする。更に、電源電圧が通常時の電圧に復帰した場合に、電源を前記バッテリーの使用に戻すことを特徴とする。
【0010】
また、終了処理の際に省電力モードに切り替えることを特徴とし、前記設定時間及び設定電圧による条件は複数有し、それぞれの条件の組み合せにより前記電源の切り替えを行うことを特徴とする。
より具体的には、電源にバッテリー(例えば図1の109)を使用し周辺回路に電源電圧を供給する電子機器の電源の瞬断制御システムであって、周辺回路に対する電源電圧を供給する電源部及び終了処理用電源部を備える電源電圧供給手段(図1の105)と、前記バッテリーの電圧が所定の設定時間以上、所定の設定電圧以下であることを検出する電圧検出部(図1の103、104)と、前記電圧検出部の出力によりバッテリーの電圧の低下を判断し、電源電圧供給手段の電源部から周辺回路への電源電圧の供給をオフ状態に制御する主制御部(図1の101、102)と、を有することを特徴とし、また、電源にバッテリー(例えば図1の109)を使用し周辺回路に電源電圧を供給する電子機器の電源の瞬断制御システムであって、周辺回路に対し電源電圧を供給する電源部及びバックアップバッテリーに電源電圧を供給する終了処理用電源部を備える電源電圧供給手段(図1の105)と、前記バッテリーの電圧が所定の設定時間以上、所定の設定電圧以下であることを検出する電圧検出部(図1の103、104)と、前記電圧検出部の出力によりバッテリーの電圧の低下を判断し、前記電源部から前記周辺回路への電源電圧の供給及び前記終了処理用電源部から前記バックアップバッテリーへの電源電圧の供給を停止する主制御部(図1の101、102)と、を有することを特徴とする。
【0011】
【発明の実施の形態】
(構成の説明)
図1は、本発明の一実施の形態としての電源の瞬断制御システム及び瞬断制御システムを用いた電子機器の構成を示す図である。本実施の形態は携帯端末等の電子機器であり、メインバッテリー109と瞬断制御システム100と周辺回路106から構成される。メインバッテリー109は電子機器全体の主たる電源電圧供給源を構成し、瞬断制御システム100は、主制御手段101、記憶手段102、電圧検出手段103、タイマー部104及び電源電圧供給手段105で構成され、周辺回路106は電源電圧供給手段105から電源供給される構成でなる。以下、各部の構成、機能を説明する。
【0012】
主制御手段101は、各種のプログラムに基づいて瞬断制御システムを含む電子機器の各部の主たる制御を行う手段である。記憶手段102は、携帯端末等としての電子機器、瞬断制御システム100およびそれを用いた周辺回路106などを制御するための前記各種のプログラム及び電子機器の機能、設定データ、動作履歴等の各種データに加え、主電源の電圧の低下を監視し検出するため、基準値として設定された任意の設定電圧(以下、瞬断検出電圧という。)及び任意の設定時間(以下、瞬断検出判定時間という。)のデータなどを格納する手段であり、主制御手段101によりリード、ライトされる。例えば前記瞬断検出判定時間及び瞬断検出電圧のデータは、それぞれ複数の設定が可能であり図示しない入力手段から主制御手段101を介して記憶手段102に記憶される。
【0013】
また、主制御手段101は電圧検出手段103、タイマー部104及び電源電圧供給手段105を制御する機能を有する。更に電圧検出手段103から送信される瞬断検出信号107を受信し、瞬断検出信号107が如何なる条件で送信されたものであるかにより、電源電圧供給手段105における電源供給を制御する。主制御手段101による電源電圧供給手段105の制御の概要は、電圧検出手段103から送信される瞬断検出信号105に基づいて、瞬断検出信号107が送信された要因を判断し、電源電圧供給手段105の複数の電源部の電源供給を選択的にオン/オフ制御して、瞬断状態での瞬断制御システムを含め電子機器の動作の正常終了への処理、例えば各種端子設定、主制御手段101やその他の回路の動作周波数を下げる等の省電力モードへの切り替えを経て、各種データの保存等の制御を行うものである。
【0014】
電圧検出手段103は、主制御手段101から設定された前記瞬断検出判定時間及び瞬断検出電圧を入力し、これらを基準値としてメインバッテリー109から出力される主電源の電圧を監視する機能を有する。より具体的には電圧検出手段103は、主電源の電圧が前記瞬断検出電圧以下の状態となり、且つ前記瞬断検出判定時間以上継続した場合に、2値信号等の瞬断検出信号107を主制御手段101に出力する。論理固定抵抗108は電圧検出手段103に電源電圧が供給されない場合などに瞬断検出信号107の論理を確定するためのプルダウン抵抗である。なお、瞬断検出信号の論理及び回路の違いによりプルアップとすることもある。
【0015】
ここで、電源電圧の瞬断の判断基準となる前記瞬断検出判定時間及び瞬断検出電圧は、主制御手段101から電圧検出手段103に対しそれぞれ単一又は複数が設定されうる。主制御手段101は記憶手段102に予め記憶された複数の瞬断検出判定時間及び瞬断検出電圧の値の内、単一又は複数の瞬断検出判定時間及び瞬断検出電圧を読み出して選択的に電圧検出手段103に設定する。
【0016】
タイマー部104は時間を計測する動作を行うものであり、電圧検出手段103に設定された瞬断検出電圧以下の電源電圧の状態をその始点から時間計測し、電圧検出手段103に設定された瞬断検出判定時間以上になると電圧検出手段103に通知する機能を有し、計測動作自体は主制御手段101に制御される。電圧検出手段103は、タイマー部104の前記機能により電源電圧の瞬断状態を判定し、主制御手段101に瞬断検出信号を出力する。
【0017】
電源電圧供給手段105は、電子機器を構成する瞬断制御システム100および周辺回路106の各ブロックに電源電圧を供給する手段であり、瞬断制御システム100を含む電子機器を正常に終了させるための終了処理用電源部、周辺回路106の個別の周辺回路1、周辺回路2、・・・周辺回路nの各々に対する供給電源としての電源部1、電源部2、・・・電源部nの複数の電源供給部から構成される。電源電圧供給手段105は、電源の電力消費を抑制する際、各電源部から供給する電力供給を選択的に切り替える。例えば、主制御手段101は瞬断状態を判断したとき電源電圧供給手段105を制御し、電源電圧供給手段105は少なくとも終了処理用電源部を除く他の電源部から周辺回路106への電力供給を停止する。
【0018】
以上の構成により、主制御手段101は電圧検出手段103からの瞬断検出信号107により、瞬断状態で終了処理用電源部を残して他の電源部の電源供給機能について、例えば全て停止させることにより終了処理用電源部が出力する電圧の低下を抑制して瞬断制御システム100を含む電子機器の動作の終了処理を正常に実行することを可能とする。
【0019】
(動作の説明)
次に、本実施の形態の動作を図面を参照して以下説明する。
図2は、本発明の実施の形態のメインバッテリー109の電圧の変化を示すグラフである。図2(a)〜(c)は通常時の電圧V0に対して、瞬時的な電圧降下を検出するための複数の瞬断検出電圧Vt1〜Vtnと、それぞれその継続時間を判定するための瞬断検出判定時間t1〜tnの関係を示す説明図である。それぞれ瞬断検出電圧Vt1〜Vtnと瞬断検出判定時間t1〜tnの条件を充足した場合に瞬断と判定する。
【0020】
電圧検出手段103は、図2(a)〜(c)に示すような複数の瞬断検出電圧を設定することが可能であり、またそれぞれの瞬断検出電圧において、瞬断検出判定時間t1〜tnを設定することが可能である。例えば図2(a)ではメインバッテリー109の電源電圧がVt1以下になっている時間がt1以上の間持続した場合に瞬断検出信号107を主制御手段101に送信する。瞬断検出信号107としては、時間t1に達するまでは電圧ロー(Low)レベルで瞬断の非検出状態を表し、時間t1に達した時点で電圧ハイ(High)レベルを出力し瞬断の検出状態を表す信号とすることができる。前述のように瞬断検出判定時間の測定にはタイマー部104が用いられる。
【0021】
複数の瞬断検出電圧と瞬断検出判定時間の組み合せは主制御手段101により任意に設定可能であり、主制御手段101は、電圧検出手段103において設定された条件を満たした場合に送信されるそれぞれの組み合せに対応する複数の瞬断検出信号107を受信して電圧低下の状況を判断し、電源電圧供給手段105に含まれる各電源部の供給のオン/オフをコントロールし、周辺回路106に供給する電源部1〜nの供給動作をオフ状態にすることにより、電子機器及び瞬断制御システムの動作の終了処理に必要な主制御手段101及び記憶手段102に電力を供給する終了処理用電源部から供給する電源電圧の低下を抑制する。
【0022】
また、以上の判定とは別に、図2(d)に示すように論理回路の正常動作などの為に必要な閾値電圧である最低動作電圧Vt0を下回った場合は瞬間的に電源をオフ(OFF)とする通常の閾値も有するように構成することができる。瞬断検出電圧Vt1〜Vtnは、最低動作電圧Vt0より高い電圧に設定される。
【0023】
図3は、本実施の形態の動作のフローチャートを示す図である。図3に示すフローチャートでは、まず主制御手段101は瞬断検出電圧の設定(302)、瞬断検出判定時間の設定(303)を行い、瞬断検出信号を検出したか否かを判断する処理ループ(304)により電子機器の瞬断状態の発生を監視するとともに、通常の各種の動作を継続する。主制御手段101が電圧検出手段103から瞬断検出信号107を受信した場合、主制御手段101は終了処理モードへ移行(305)し、終了処理用電源部以外の電源供給を停止(306)し、終了処理を行う(307)。この終了処理モードで行われる処理としては、例えば各周辺回路機能をOFFにすることにより必要となる端子処理設定(プルアップ/プルダウンなど)を行うことや主制御手段101やその周辺回路106の動作周波数を下げる、動作電圧を下げるなどの消費電流の低減を行うところの省電力モードに替えるなどの動作である。
【0024】
図4は、電圧検出手段103に複数の瞬断検出電圧と瞬断検出判定時間を設定した場合の判定処理の内容を示す図である。例えば、電源電圧が低下する各種の原因が考えられるが、一般に軽度の電圧低下から重度の電圧低下までを、複数の瞬断検出電圧Vt1〜Vtnにより類別し、それぞれの電圧低下に対し設定された瞬断検出判定時間t1〜tnにより瞬断か否かの判定を行い、電源供給のオン/オフ制御を行う。例えば、僅かな電圧低下の場合には比較的長い瞬断検出判定時間Vt1を設定し、大きな電圧低下には短かい瞬断検出判定時間Vtnを設定し、主制御手段101では電圧検出手段103からそれぞれの瞬断検出信号を受信することにより、何れの電源部からの電源供給をオフにするか等のきめ細かい制御を行うことを可能とする。
【0025】
また、主制御手段は、電圧検出手段103に対し複数の瞬断検出電圧及び瞬断検出判定時間を設定し瞬断検出信号を受信することにより、どれくらいの頻度、どれくらいの電圧まで電圧低下が起きているのかを認知することができ、電源の性能の評価、消耗度等を監視することが可能である。
(他の実施の形態)
本発明の第2の実施の形態としては、終了処理用のバックアップ用のバッテリー(バックアップバッテリー)を付加し、電圧検出手段103が瞬断検出信号107を送信した際にハード的にバックアップモードに移行し、より確実に終了処理を行う例が考えられる。
【0026】
図5は、本発明の第2の実施の形態を示す図である。第2の実施の形態における基本的な構成は第1の実施の形態と基本的には同等であるが、電界効果トランジスタ(以下、FETという。)110、ダイオード111、バックアップバッテリー112、バックアップバッテリーへの突入電流防止用抵抗113を付加する点が異なる。
【0027】
FET110は主制御手段101と記憶手段102などの終了処理に必要な回路へ供給される電源電圧の供給源を切り替えるためのスイッチ機能を有しており、瞬断検出信号107により制御される。この例では瞬断検出信号107がLowの時にFETがONとなり、Highの時にOFFとなるPチャネル型FETとしているが、瞬断検出信号107の論理や回路構成などによりNチャネル型FETなどの構成も採り得る。また同様な機能を有する他のデバイスを使用する構成とすることも可能である。
【0028】
ダイオード111は終了処理用電源部からの電源電圧をバックアップバッテリー112にFET110をバイパスして供給するためのものであり、これによりFET110の状態にかかわり無く、主制御手段101、記憶手段102へ電源供給することが可能となる。バックアップバッテリー112は瞬断検出時に主制御手段101、記憶手段102に電源を供給するための補助バッテリーであり、通常時には終了処理用電源部からの電源電圧により充電されており、瞬断検出時でかつ終了処理用電源部からの供給電圧が減少もしくは無くなった場合に終了処理に必要な電源電圧の供給源として機能する。突入電流防止用抵抗113はバックアップバッテリー112への充電電流を制限するための抵抗であり、バックアップバッテリーの劣化を防止する機能を有する。
【0029】
次に、第2の実施の形態の動作を図5を用いて説明する。第1の実施の形態と基本的な動作は同様であるが、瞬断検出信号107が送信され、終了処理モードへと移行するまでの動作が異なっている。
【0030】
電源検出手段103から瞬断検出信号107が主制御手段101へ送信されると同時にFET110がOFFになる。この後に終了処理用電源部から供給される電源電圧が十分に高い場合には、ダイオード111を介して終了処理用電源部から主制御手段101、記憶手段102へと電源電圧が供給されるが、終了処理用電源部から供給される電源電圧がバックアップバッテリー112から供給される電圧よりも低くなった場合には主としてバックアップバッテリー112から主制御手段101、記憶手段102へ電源電圧が供給される。
【0031】
ここで主制御手段101は電圧検出手段103が動作している場合には瞬断検出信号107の送信要因を判断しメインバッテリー電圧低下が一時的なもので、まだしばらくの間、通常動作が可能であると判断した場合には、電圧検出手段103を制御して、瞬断検出信号107を瞬断が検出されないことを示すLow状態にし、FET110をONとして、電源供給源を通常の終了処理用電源部のみの状態に戻す。つまり、主制御手段101は、電源電圧が通常時の電圧に復帰したと判断できる場合に、電源を前記バッテリー109の使用に戻す制御を行う。
【0032】
電圧検出手段103や電源電圧供給手段105が動作していない場合などメインバッテリーの電圧が低下し通常動作不能な状態であると判断される場合には、終了処理を行う終了処理モードへ移行する。ここでのバックアップバッテリー112の容量はこの終了処理を行うのに十分な容量が必要である。この第2の実施の形態においては電源電圧供給源の切り替えがハードウェアで行われるため、最低動作電圧よりも高い電圧に設定されている瞬断検出電圧だけでなく、急峻な電圧変動などにより、不意に最低動作電圧以下になるような電源が切断される場合などにも正常な終了処理を行うことが可能である。
【0033】
以上の実施の形態では、正常な終了処理を可能とする例で説明したが、瞬断による終了処理は緊急の終了処理として、終了画面を表示する時間の短縮などの冗長な処理を省略した、より短時間で行える処理へ変更することが可能である。
なお、本発明は上記各実施の形態に限定されず、本発明の技術思想の範囲内において、各実施の形態は適宜変更され得ることは明らかである。
【0034】
【発明の効果】
本発明によれば、設定された設定時間(瞬断検出判定時間)以上、設定された設定電圧(瞬断検出電圧)以下を条件として周辺回路の電源供給を停止し、正常な終了処理を行うための電源供給のみを動作させるように構成することにより、バッテリー切れや瞬断の危険性がある場合に終了処理に必要でない周辺回路の電源を切ることができ、消費電流を減少させ正常な終了処理を完了するまでの時間を確保することが可能である。
【0035】
また、複数の瞬断検出電圧等を設け、同様な処理を行った際の電圧低下量をモニタするように構成することにより、電圧低下の危険性をより正確に把握し、バッテリー残量を有効に活用することが可能である。
【0036】
更に、複数の瞬断検出電圧を設けることにより、主制御手段は瞬時電圧低下がどれくらいの頻度、どれくらいの電圧まで起きているのかを認知することが可能であり、このことにより瞬断の危険性をより正確に予測し、通常通りの動作を継続するか、もしくは消費電流の大きな周辺回路の電源を切り、正常な終了処理を完了するまでの時間を確保するか、といった状況に応じた処理が可能となる。
【0037】
また、ある任意の周辺回路起動時等の瞬間的なバッテリーの電圧低下量をモニタすることを可能とすることにより、バッテリー性能の低下時など電圧低下量が変動した場合にも、それに応じた処理が可能となる。
【0038】
本発明によれば、バックアップバッテリーを設けることにより、メインバッテリー電圧の瞬断時などにハードウェアによる電源供給源を切り替え、確実に終了処理を行うことが可能となる。
【0039】
また、バックアップバッテリーを設けた場合、瞬断時にはバックアップバッテリーに切り替えるとともに、メインバッテリー電圧が正常状態へ復帰した後は通常状態へ戻すことが可能なため、瞬断対策のための電圧マージンを減らすことが可能になりバッテリー寿命を延ばすことが可能となる。
【0040】
更に、電子機器が動作可能な最低動作電圧をも設定することにより、予期せぬタイミングで電源が切れてしまうような場合にも、電子機器の正常な終了処理を行うために必要な回路ブロックへ電源電圧の供給を切り替えることが可能となる。
【図面の簡単な説明】
【図1】本発明の第1の実施の形態の電源の瞬断制御システム及び瞬断制御システムを含む電子機器の構成を示す図である。
【図2】本実施の形態のメインバッテリー109の電圧の変化を示すグラフである。
【図3】本実施の形態の動作のフローチャートを示す図である。
【図4】電圧検出手段に複数の瞬断検出電圧と瞬断検出判定時間を設定した場合の判定処理の内容を示す図である。
【図5】本発明の第2の実施の形態を示す図である。
【符号の説明】
100 瞬断制御システム
101 主制御手段
102 記憶手段バックアップバッテリー
103 電圧検出手段
104 タイマー部
105 電源電圧供給手段
106 周辺回路
107 瞬断検出信号
108 プルダウン抵抗
109 バッテリー
110 電界効果トランジスタ(FET)
111 ダイオード
112 バックアップバッテリー
113 抵抗
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a power supply instantaneous interruption control system, and more particularly to an electronic apparatus that is operated by a battery such as a portable terminal (PDA) such as a mobile phone or a notebook personal computer (PC). The present invention relates to an instantaneous interruption control system for detecting and controlling an interruption and electronic equipment using the instantaneous interruption control system.
[0002]
[Prior art]
In a portable terminal such as a mobile phone, a battery-operated terminal such as a PDA and a notebook PC, a steep voltage fluctuation occurs even when a large current consumption operation is performed such as turning on a backlight of a display unit and transmitting and receiving communication data. It can happen. In other words, even in such a voltage fluctuation, the voltage fluctuation is large, the battery capacity is small, the battery performance is depleted due to aging and use frequency, and the battery performance is low and the temperature is low. In such a case, the voltage becomes lower than the minimum voltage necessary for functioning as a device, that is, a state close to a so-called instantaneous interruption occurs. In such an instantaneous interruption state, there is a problem that normal termination processing of the apparatus is not performed, and data destruction occurs in a memory or the like, and apparatus destruction such as a head crash occurs in a magnetic disk apparatus.
[0003]
Conventionally, there has been known an instantaneous interruption detection circuit for detecting an instantaneous interruption of a power supply voltage in which the voltage of a battery or the like instantaneously drops, and performing a response such as data backup (Patent Documents 1 to 3). 3). In particular, Patent Literature 1 relates to a mobile telephone device or the like using a secondary battery as a driving power supply, and accurately detects a so-called instantaneous interruption state in which a power supply voltage drops for a short time of about several seconds due to an impact such as a drop. As a method, the battery voltage monitoring circuit determines whether or not the battery voltage is equal to or higher than a predetermined reference value.If the battery voltage is lower than the reference value, the duration is measured by a counter. A technique for determining whether or not there is is described.
[0004]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 9-305421 [Patent Document 2]
JP 2001-251783 A [Patent Document 3]
JP-A-2002-111787 [0005]
[Problems to be solved by the invention]
As a countermeasure against the former problem of the drop in the power supply voltage, the lower limit of the usable battery voltage is usually set higher, or the remaining amount of the battery is estimated. Nevertheless, the problem is avoided by, for example, taking a large margin for the voltage that can be used and performing early termination processing. However, this method conflicts with the desire to lower the lower limit of the battery usable voltage and extend the operable time as much as possible, even though the current consumption of each function has increased due to the recent increase in the number of functions of mobile phones and PDAs. In addition, it is very difficult to estimate the voltage fluctuation when multiple functions are started at the same time, and the power may be shut down during the normal termination processing, resulting in data corruption. there were.
[0006]
In addition, it is conceivable to use the complete instantaneous interruption detection caused by the contact failure of the battery power supply due to the impact such as the above-mentioned device drop, etc., but the normal termination processing is completed for the voltage drop due to the battery voltage fluctuation. A suitable control system that secures the time until the operation has not been realized.
[0007]
SUMMARY OF THE INVENTION It is an object of the present invention to provide a function that enables normal termination processing to be performed even when the voltage of an electronic device that operates on a battery decreases due to a voltage change of the battery.
An object of the present invention is to provide a portable terminal mainly operated by a battery such as a mobile phone, a personal digital assistant (PDA), and a notebook personal computer, and a normal termination even when the voltage drops due to a voltage fluctuation of the battery. It is to provide a function that enables processing.
SUMMARY OF THE INVENTION It is an object of the present invention to reduce the current consumption and secure a time until a normal termination process is completed when there is a risk of running out of a battery or an instantaneous interruption of an electronic device.
SUMMARY OF THE INVENTION An object of the present invention is to reduce a margin of a used voltage and extend a battery life in order to cope with an instantaneous interruption state.
[0008]
[Means for Solving the Problems]
The instantaneous interruption control system of the present invention is an instantaneous interruption control system for a power supply of an electronic device that uses a battery (e.g., 109 in FIG. 1) as a power supply and supplies a power supply voltage to peripheral circuits. As described above, on condition that the voltage is equal to or lower than the predetermined set voltage, power supply from the battery to peripheral circuits (for example, 106 in FIG. 1) is stopped, and power supply for performing normal termination processing of the electronic device (for example, FIG. The power supply is switched so as to operate only the power supply unit (the power supply from the termination processing power supply unit 105).
[0009]
The instantaneous interruption control system of the present invention is an instantaneous interruption control system for a power supply of an electronic device that uses a battery as a power supply, provided that the power supply voltage is equal to or longer than a predetermined set time and equal to or lower than a predetermined set voltage. The power supply is switched so that power supply for performing normal termination processing of the device is performed from another backup battery, provided that the power supply voltage is equal to or lower than the minimum operating voltage at which the electronic device can operate. Is switched to the backup battery. Further, when the power supply voltage returns to the normal voltage, the power supply is returned to the use of the battery.
[0010]
Further, it is characterized in that the mode is switched to the power saving mode at the time of the end processing, a plurality of conditions based on the set time and the set voltage are provided, and the power supply is switched by a combination of the respective conditions.
More specifically, the present invention relates to a power supply instantaneous interruption control system for an electronic device that uses a battery (eg, 109 in FIG. 1) as a power supply and supplies a power supply voltage to peripheral circuits, and a power supply unit that supplies a power supply voltage to the peripheral circuits. Power supply means (105 in FIG. 1) including a power supply unit for termination processing, and a voltage detection unit (103 in FIG. 1) for detecting that the voltage of the battery is equal to or longer than a predetermined set time and equal to or lower than a predetermined set voltage. , 104) and a main control unit (see FIG. 1) that determines a decrease in the battery voltage based on the output of the voltage detection unit and controls the supply of the power supply voltage from the power supply unit of the power supply voltage supply unit to the peripheral circuit to an off state. 101, 102), and an instantaneous power interruption control system for an electronic device that uses a battery (eg, 109 in FIG. 1) as a power supply and supplies a power supply voltage to peripheral circuits. A power supply unit (105 in FIG. 1) including a power supply unit for supplying a power supply voltage to a peripheral circuit and a power supply unit for termination processing for supplying a power supply voltage to a backup battery; A voltage detection unit (103, 104 in FIG. 1) for detecting that the voltage is equal to or lower than a predetermined set voltage; and determining a drop in battery voltage based on an output of the voltage detection unit. A main control unit (101, 102 in FIG. 1) for stopping supply of voltage and supply of a power supply voltage from the power supply unit for termination processing to the backup battery.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
(Description of configuration)
FIG. 1 is a diagram showing a configuration of a power supply instantaneous interruption control system and an electronic device using the instantaneous interruption control system according to an embodiment of the present invention. The present embodiment is an electronic device such as a portable terminal, and includes a main battery 109, an instantaneous interruption control system 100, and a peripheral circuit 106. The main battery 109 forms a main power supply voltage source of the entire electronic device, and the instantaneous interruption control system 100 includes a main control unit 101, a storage unit 102, a voltage detection unit 103, a timer unit 104, and a power supply voltage supply unit 105. , The peripheral circuit 106 is configured to be supplied with power from the power supply voltage supply means 105. Hereinafter, the configuration and function of each unit will be described.
[0012]
The main control unit 101 is a unit that performs main control of each unit of the electronic device including the instantaneous interruption control system based on various programs. The storage unit 102 stores the various programs for controlling the electronic device such as a portable terminal, the instantaneous interruption control system 100 and the peripheral circuit 106 using the same, and the functions of the electronic device, setting data, operation history, and the like. In addition to the data, in order to monitor and detect a drop in the voltage of the main power supply, an arbitrary set voltage (hereinafter, referred to as an instantaneous interruption detection voltage) set as a reference value and an arbitrary set time (hereinafter, an instantaneous interruption detection determination time) ), And are read and written by the main control unit 101. For example, the data of the instantaneous interruption detection determination time and the instantaneous interruption detection voltage can be set in plurals, and are stored in the storage unit 102 from the input unit (not shown) via the main control unit 101.
[0013]
Further, the main control unit 101 has a function of controlling the voltage detection unit 103, the timer unit 104, and the power supply voltage supply unit 105. Further, it receives an instantaneous interruption detection signal 107 transmitted from the voltage detection unit 103 and controls the power supply in the power supply voltage supply unit 105 according to the conditions under which the instantaneous interruption detection signal 107 is transmitted. The outline of the control of the power supply voltage supply means 105 by the main control means 101 is to judge the cause of the transmission of the instantaneous interruption detection signal 107 based on the instantaneous interruption detection signal 105 transmitted from the voltage detection means 103, Means for selectively turning on / off the power supply of the plurality of power supply units of the means 105, and processing for normal termination of the operation of the electronic device including the momentary interruption control system in the momentary interruption state, for example, various terminal settings, main control After switching to a power saving mode such as lowering the operating frequency of the means 101 and other circuits, control such as storage of various data is performed.
[0014]
The voltage detection means 103 has a function of inputting the instantaneous interruption detection determination time and the instantaneous interruption detection voltage set by the main control means 101 and monitoring the voltage of the main power supply output from the main battery 109 using these as reference values. Have. More specifically, the voltage detection means 103 outputs the instantaneous interruption detection signal 107 such as a binary signal when the voltage of the main power supply is lower than the instantaneous interruption detection voltage and continues for the instantaneous interruption detection determination time or longer. Output to the main control means 101. The logic fixed resistor 108 is a pull-down resistor for determining the logic of the instantaneous interruption detection signal 107 when the power supply voltage is not supplied to the voltage detection means 103 or the like. In addition, pull-up may be performed depending on the difference in logic and circuit of the instantaneous interruption detection signal.
[0015]
Here, the main control unit 101 may set a single or a plurality of the instantaneous interruption detection determination times and the instantaneous interruption detection voltages, which are criteria for judging the instantaneous interruption of the power supply voltage. The main control means 101 reads out one or a plurality of instantaneous interruption detection determination times and instantaneous interruption detection voltages from a plurality of instantaneous interruption detection determination times and instantaneous interruption detection voltages stored in advance in the storage means 102 and selectively reads them. Is set to the voltage detecting means 103.
[0016]
The timer section 104 performs an operation of measuring time. The timer section 104 measures the state of the power supply voltage equal to or lower than the instantaneous interruption detection voltage set in the voltage detection section 103 from the start point thereof, and sets the instantaneous state set in the voltage detection section 103. It has a function of notifying the voltage detection means 103 when the disconnection detection determination time has elapsed, and the measurement operation itself is controlled by the main control means 101. The voltage detection means 103 determines an instantaneous interruption state of the power supply voltage by the function of the timer section 104 and outputs an instantaneous interruption detection signal to the main control section 101.
[0017]
The power supply voltage supply unit 105 is a unit that supplies a power supply voltage to each block of the instantaneous interruption control system 100 and the peripheral circuit 106 that constitute the electronic device, and is used for normally terminating the electronic device including the instantaneous interruption control system 100. A plurality of power supply units 1, 2,... As a power supply for each of the peripheral circuits 106,. It is composed of a power supply unit. When suppressing power consumption of the power supply, the power supply voltage supply unit 105 selectively switches power supply supplied from each power supply unit. For example, the main control means 101 controls the power supply voltage supply means 105 when judging the instantaneous interruption state, and the power supply voltage supply means 105 supplies power to the peripheral circuit 106 from at least another power supply unit except the termination processing power supply unit. Stop.
[0018]
With the above configuration, the main control unit 101 stops the power supply function of the other power supply units except the power supply unit for termination processing in the instantaneous interruption state, for example, based on the instantaneous interruption detection signal 107 from the voltage detection unit 103. Accordingly, it is possible to suppress a drop in the voltage output from the power supply unit for termination processing, and to normally execute the termination processing of the operation of the electronic device including the instantaneous interruption control system 100.
[0019]
(Description of operation)
Next, the operation of the present embodiment will be described below with reference to the drawings.
FIG. 2 is a graph showing a change in voltage of main battery 109 according to the embodiment of the present invention. FIGS. 2A to 2C show a plurality of instantaneous interruption detection voltages Vt1 to Vtn for detecting an instantaneous voltage drop with respect to the normal voltage V0, and instantaneous interruptions for respectively determining the duration thereof. FIG. 4 is an explanatory diagram showing a relationship between disconnection detection determination times t1 to tn. The instantaneous interruption is determined when the conditions of the instantaneous interruption detection voltages Vt1 to Vtn and the instantaneous interruption detection determination times t1 to tn are satisfied, respectively.
[0020]
The voltage detecting means 103 can set a plurality of instantaneous interruption detection voltages as shown in FIGS. 2A to 2C. tn can be set. For example, in FIG. 2A, the instantaneous interruption detection signal 107 is transmitted to the main control unit 101 when the time during which the power supply voltage of the main battery 109 is lower than Vt1 continues for more than t1. Until the time t1, the instantaneous interruption detection signal 107 indicates the non-detection state of the instantaneous interruption at the voltage low level, and outputs the voltage high level at the time t1 to detect the instantaneous interruption. It can be a signal indicating a state. As described above, the timer unit 104 is used for measuring the instantaneous interruption detection determination time.
[0021]
The combination of a plurality of instantaneous interruption detection voltages and instantaneous interruption detection determination times can be arbitrarily set by the main control unit 101, and the main control unit 101 is transmitted when the condition set by the voltage detection unit 103 is satisfied. A plurality of instantaneous interruption detection signals 107 corresponding to the respective combinations are received, the state of the voltage drop is determined, and the on / off of each power supply unit included in the power supply voltage supply unit 105 is controlled. A power supply for termination processing for supplying power to the main control means 101 and the storage means 102 necessary for termination processing of operations of the electronic device and the instantaneous interruption control system by turning off the supply operation of the power supply units 1 to n to be supplied. The power supply voltage supplied from the unit is suppressed from decreasing.
[0022]
In addition to the above-described determination, when the voltage falls below the minimum operating voltage Vt0 which is a threshold voltage necessary for normal operation of the logic circuit as shown in FIG. ) Can also be configured to have a normal threshold. The instantaneous interruption detection voltages Vt1 to Vtn are set to voltages higher than the minimum operation voltage Vt0.
[0023]
FIG. 3 is a diagram showing a flowchart of the operation of the present embodiment. In the flowchart shown in FIG. 3, first, the main control means 101 sets an instantaneous interruption detection voltage (302), sets an instantaneous interruption detection determination time (303), and determines whether or not an instantaneous interruption detection signal has been detected. The loop (304) monitors the occurrence of the instantaneous interruption state of the electronic device and continues various normal operations. When the main control unit 101 receives the instantaneous interruption detection signal 107 from the voltage detection unit 103, the main control unit 101 shifts to the end processing mode (305) and stops the power supply other than the end processing power supply unit (306). Then, an end process is performed (307). The processing performed in the termination processing mode includes, for example, performing terminal processing settings (pull-up / pull-down, etc.) required by turning off each peripheral circuit function, and operations of the main control unit 101 and its peripheral circuits 106. This is an operation such as switching to a power saving mode in which current consumption is reduced by lowering the frequency or operating voltage.
[0024]
FIG. 4 is a diagram illustrating the contents of the determination processing when a plurality of instantaneous interruption detection voltages and instantaneous interruption detection determination times are set in the voltage detection unit 103. For example, various causes of the power supply voltage drop can be considered. In general, a range from a slight voltage drop to a severe voltage drop is classified by a plurality of instantaneous interruption detection voltages Vt1 to Vtn, and set for each voltage drop. It is determined whether or not there is a momentary interruption based on the instantaneous interruption detection decision times t1 to tn, and ON / OFF control of power supply is performed. For example, in the case of a small voltage drop, a relatively long instantaneous interruption detection determination time Vt1 is set, and in the case of a large voltage drop, a short instantaneous interruption detection determination time Vtn is set. By receiving each instantaneous interruption detection signal, it is possible to perform fine control such as which power supply unit is to be turned off.
[0025]
Further, the main control unit sets a plurality of instantaneous interruption detection voltages and instantaneous interruption detection determination times for the voltage detection unit 103 and receives the instantaneous interruption detection signal, so that the frequency of the voltage drop and how much voltage can be reduced. It is possible to recognize whether the power supply is operating and to evaluate the performance of the power supply and monitor the degree of consumption.
(Other embodiments)
As a second embodiment of the present invention, a backup battery (backup battery) for termination processing is added, and when the voltage detection means 103 transmits the instantaneous interruption detection signal 107, the mode is shifted to the backup mode by hardware. Then, an example in which the termination process is performed more reliably can be considered.
[0026]
FIG. 5 is a diagram showing a second embodiment of the present invention. The basic configuration of the second embodiment is basically the same as that of the first embodiment, but includes a field-effect transistor (hereinafter referred to as FET) 110, a diode 111, a backup battery 112, and a backup battery. In that an inrush current prevention resistor 113 is added.
[0027]
The FET 110 has a switch function for switching the supply source of the power supply voltage supplied to the circuits necessary for the termination processing such as the main control unit 101 and the storage unit 102, and is controlled by the instantaneous interruption detection signal 107. In this example, the P-channel FET is turned on when the instantaneous interruption detection signal 107 is Low and is turned off when the instantaneous interruption detection signal 107 is High. Can also be adopted. It is also possible to adopt a configuration using another device having a similar function.
[0028]
The diode 111 supplies the power supply voltage from the power supply for termination processing to the backup battery 112 by bypassing the FET 110, thereby supplying power to the main control unit 101 and the storage unit 102 regardless of the state of the FET 110. It is possible to do. The backup battery 112 is an auxiliary battery for supplying power to the main control unit 101 and the storage unit 102 when an instantaneous interruption is detected. The backup battery 112 is normally charged by the power supply voltage from the power supply unit for termination processing. In addition, when the supply voltage from the termination processing power supply unit decreases or disappears, it functions as a supply source of a power supply voltage necessary for the termination processing. The inrush current prevention resistor 113 is a resistor for limiting the charging current to the backup battery 112, and has a function of preventing the backup battery from deteriorating.
[0029]
Next, the operation of the second embodiment will be described with reference to FIG. The basic operation is the same as that of the first embodiment, except that the operation from when the instantaneous interruption detection signal 107 is transmitted to when the mode shifts to the end processing mode is different.
[0030]
The FET 110 is turned off at the same time that the instantaneous interruption detection signal 107 is transmitted from the power supply detection unit 103 to the main control unit 101. Thereafter, when the power supply voltage supplied from the power supply unit for termination processing is sufficiently high, the power supply voltage is supplied from the power supply unit for termination processing to the main control unit 101 and the storage unit 102 via the diode 111. When the power supply voltage supplied from the termination processing power supply unit becomes lower than the voltage supplied from the backup battery 112, the power supply voltage is mainly supplied from the backup battery 112 to the main control unit 101 and the storage unit 102.
[0031]
Here, when the voltage detection unit 103 is operating, the main control unit 101 determines the transmission factor of the instantaneous interruption detection signal 107, and the main battery voltage drop is temporary, and the normal operation can be performed for a while. If it is determined that the instantaneous interruption is detected, the instantaneous interruption detection signal 107 is set to the Low state indicating that the instantaneous interruption is not detected, the FET 110 is turned on, and the power supply source is switched to the normal termination processing. Return to the power supply only state. That is, when it is determined that the power supply voltage has returned to the normal voltage, the main control unit 101 performs control to return the power supply to use of the battery 109.
[0032]
When it is determined that the voltage of the main battery is low and the battery cannot be normally operated, such as when the voltage detection unit 103 and the power supply unit 105 are not operating, the process shifts to an end processing mode for performing an end process. Here, the capacity of the backup battery 112 needs to be sufficient to perform this termination processing. In the second embodiment, since the switching of the power supply voltage source is performed by hardware, not only the instantaneous interruption detection voltage set to a voltage higher than the minimum operating voltage but also a sharp voltage change, etc. Normal termination processing can be performed even when the power supply suddenly becomes lower than the minimum operating voltage, for example.
[0033]
In the above embodiment, the example in which the normal termination process is enabled has been described. However, the termination process due to the instantaneous interruption is an emergency termination process, and redundant processes such as shortening the time for displaying the termination screen are omitted. It is possible to change to processing that can be performed in a shorter time.
It should be noted that the present invention is not limited to the above embodiments, and it is clear that the embodiments can be appropriately modified within the scope of the technical idea of the present invention.
[0034]
【The invention's effect】
According to the present invention, the power supply to the peripheral circuit is stopped under the condition that the set time is longer than the set time (sudden interruption detection determination time) and is equal to or less than the set voltage (sudden interruption detection voltage), and the normal termination processing is performed. The power supply to the peripheral circuits that are not necessary for the termination process when there is a risk of running out of battery or instantaneous interruption, reducing current consumption and terminating normally. It is possible to secure time until the processing is completed.
[0035]
Also, by providing a plurality of instantaneous interruption detection voltages, etc., and monitoring the amount of voltage drop when similar processing is performed, the danger of a voltage drop can be grasped more accurately, and the remaining battery level is effective. It can be used for
[0036]
Furthermore, by providing a plurality of instantaneous interruption detection voltages, the main control means can recognize how frequently and how much voltage is applied to the instantaneous voltage drop, which may cause a risk of instantaneous interruption. Process more accurately, and continue the normal operation, or turn off the peripheral circuits that consume a large amount of current and secure time until the normal termination process is completed. It becomes possible.
[0037]
In addition, by enabling monitoring of the instantaneous voltage drop of the battery at the time of starting a certain peripheral circuit or the like, even when the voltage drop is fluctuated such as when the battery performance is lowered, processing corresponding to the fluctuation is performed. Becomes possible.
[0038]
According to the present invention, by providing the backup battery, it is possible to switch the power supply source by hardware when the main battery voltage is momentarily interrupted or the like, and to perform the termination process reliably.
[0039]
Also, if a backup battery is provided, it is possible to switch to the backup battery in the event of an instantaneous interruption, and to return to the normal state after the main battery voltage returns to the normal state. And the battery life can be extended.
[0040]
Further, by setting the minimum operating voltage at which the electronic device can operate, even if the power is shut off at an unexpected timing, the circuit block necessary for performing the normal termination processing of the electronic device can be set. The supply of the power supply voltage can be switched.
[Brief description of the drawings]
FIG. 1 is a diagram showing a configuration of a power supply instantaneous interruption control system and an electronic device including an instantaneous interruption control system according to a first embodiment of the present invention.
FIG. 2 is a graph showing a change in voltage of a main battery 109 according to the present embodiment.
FIG. 3 is a diagram showing a flowchart of the operation of the present embodiment.
FIG. 4 is a diagram illustrating the contents of a determination process when a plurality of instantaneous interruption detection voltages and instantaneous interruption detection determination times are set in a voltage detection unit.
FIG. 5 is a diagram showing a second embodiment of the present invention.
[Explanation of symbols]
REFERENCE SIGNS LIST 100 instantaneous interruption control system 101 main control unit 102 storage unit backup battery 103 voltage detection unit 104 timer unit 105 power supply voltage supply unit 106 peripheral circuit 107 instantaneous interruption detection signal 108 pull-down resistor 109 battery 110 field effect transistor (FET)
111 Diode 112 Backup battery 113 Resistance

Claims (10)

電源にバッテリーを使用し周辺回路に電源電圧を供給する電源の瞬断制御システムであって、電源電圧が所定の設定時間以上、所定の設定電圧以下であることを条件として、前記バッテリーから周辺回路への電源供給を停止し、正常な終了処理を行うための電源供給のみを動作させるように電源を切り替えることを特徴とする瞬断制御システム。A power supply instantaneous interruption control system that uses a battery as a power supply and supplies a power supply voltage to a peripheral circuit, wherein the power supply voltage is equal to or longer than a predetermined set time and equal to or lower than a predetermined set voltage. A power interruption control system characterized in that the power supply to the power supply is stopped and the power supply is switched so as to operate only the power supply for performing a normal termination process. 電源にバッテリーを使用する電源の瞬断制御システムであって、電源電圧が所定の設定時間以上、所定の設定電圧以下であることを条件として、正常な終了処理を行うための電源供給を別のバックアップバッテリーから行うように電源を切り替えることを特徴とする瞬断制御システム。A power supply instantaneous interruption control system using a battery as a power supply, provided that a power supply voltage for performing a normal termination process is different from another power supply voltage for a predetermined set time or more and a predetermined set voltage or less. An instantaneous interruption control system characterized by switching the power supply as if by a backup battery. 電源電圧が動作可能な最低動作電圧以下であることを条件として、電源を前記バックアップバッテリーに切り替えることを特徴とする請求項2記載の瞬断制御システム。3. The instantaneous interruption control system according to claim 2, wherein a power supply is switched to the backup battery on condition that a power supply voltage is equal to or lower than an operable minimum operation voltage. 電源電圧が通常時の電圧に復帰した場合に、電源を前記バッテリーの使用に戻すことを特徴とする請求項2又は3記載の瞬断制御システム。4. The instantaneous interruption control system according to claim 2, wherein the power supply is returned to the use of the battery when the power supply voltage returns to the normal voltage. 終了処理の際に省電力モードに切り替えることを特徴とする請求項1ないし4の何れかの請求項記載の瞬断制御システム。The instantaneous interruption control system according to any one of claims 1 to 4, wherein the system is switched to a power saving mode during the termination processing. 前記設定時間及び設定電圧による条件は複数有し、それぞれの条件の組み合せにより前記電源の切り替えを行うことを特徴とする請求項1ないし5の何れか1つの請求項記載の瞬断制御システム。The instantaneous interruption control system according to any one of claims 1 to 5, wherein there are a plurality of conditions according to the set time and the set voltage, and the power supply is switched according to a combination of the respective conditions. 請求項1ないし6の何れかの請求項記載の瞬断制御システムを備えることを特徴とする電子機器。An electronic device comprising the instantaneous interruption control system according to claim 1. 電源にバッテリーを使用し周辺回路に電源電圧を供給する電子機器の電源の瞬断制御システムであって、周辺回路に対する電源電圧を供給する電源部及び終了処理用電源部を備える電源電圧供給手段と、前記バッテリーの電圧が所定の設定時間以上、所定の設定電圧以下であることを検出する電圧検出部と、前記電圧検出部の出力によりバッテリーの電圧の低下を判断し、電源電圧供給手段の電源部から周辺回路への電源電圧の供給をオフ状態に制御する主制御部と、を有することを特徴とする瞬断制御システム。A power supply instantaneous interruption control system for an electronic device that supplies a power supply voltage to a peripheral circuit using a battery as a power supply, comprising a power supply unit that supplies a power supply voltage to the peripheral circuit and a power supply unit for termination processing, A voltage detecting unit for detecting that the voltage of the battery is equal to or longer than a predetermined set time and equal to or lower than a predetermined set voltage; and determining whether the voltage of the battery is low based on an output of the voltage detecting unit. And a main control unit for controlling the supply of the power supply voltage from the unit to the peripheral circuit to an off state. 電源にバッテリーを使用し周辺回路に電源電圧を供給する電子機器の電源の瞬断制御システムであって、周辺回路に対し電源電圧を供給する電源部及びバックアップバッテリーに電源電圧を供給する終了処理用電源部を備える電源電圧供給手段と、前記バッテリーの電圧が所定の設定時間以上、所定の設定電圧以下であることを検出する電圧検出部と、前記電圧検出部の出力によりバッテリーの電圧の低下を判断し、前記電源部から前記周辺回路への電源電圧の供給及び前記終了処理用電源部から前記バックアップバッテリーへの電源電圧の供給を停止する主制御部と、を有することを特徴とする瞬断制御システム。A power supply instantaneous interruption control system for an electronic device that uses a battery as a power supply and supplies a power supply voltage to peripheral circuits, for a power supply unit that supplies power supply voltage to peripheral circuits and a termination process that supplies power supply voltage to a backup battery A power voltage supply unit including a power supply unit, a voltage detection unit that detects that the voltage of the battery is equal to or longer than a predetermined set time and equal to or lower than a predetermined set voltage; and A main control unit for judging and stopping supply of a power supply voltage from the power supply unit to the peripheral circuit and supply of a power supply voltage from the termination processing power supply unit to the backup battery. Control system. 前記電圧検出部はそれぞれ複数の設定時間及び設定電圧により、バッテリーの電圧を検出し、前記主制御部は、前記電圧検出部の複数の検出結果によりバッテリーの電圧の低下を判断することを特徴とする請求項8又は9記載の瞬断検出システム。The voltage detection unit detects a battery voltage based on a plurality of set times and a set voltage, and the main control unit determines a decrease in the battery voltage based on a plurality of detection results of the voltage detection unit. The instantaneous interruption detection system according to claim 8 or 9, wherein
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007148634A (en) * 2005-11-25 2007-06-14 Koyo Electronics Ind Co Ltd Power supply monitoring device
JP2012014009A (en) * 2010-07-01 2012-01-19 Ricoh Co Ltd Electromagnetic actuator inspection device and image forming apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007148634A (en) * 2005-11-25 2007-06-14 Koyo Electronics Ind Co Ltd Power supply monitoring device
JP2012014009A (en) * 2010-07-01 2012-01-19 Ricoh Co Ltd Electromagnetic actuator inspection device and image forming apparatus

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