JPH1118430A - Temperature failure detection protection circuit - Google Patents
Temperature failure detection protection circuitInfo
- Publication number
- JPH1118430A JPH1118430A JP9168454A JP16845497A JPH1118430A JP H1118430 A JPH1118430 A JP H1118430A JP 9168454 A JP9168454 A JP 9168454A JP 16845497 A JP16845497 A JP 16845497A JP H1118430 A JPH1118430 A JP H1118430A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- signal
- adapter
- power
- control unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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- Power Sources (AREA)
- Rectifiers (AREA)
- Control Of Voltage And Current In General (AREA)
- Power Conversion In General (AREA)
- Electronic Switches (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は電子機器の温度異常を検
出して、電子機器を保護する温度異常検出保護回路に関
し、特にＡＣアダプタの温度異常検出保護回路に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protection circuit for detecting abnormal temperature of electronic equipment and protecting the electronic equipment, and more particularly to a protection circuit for detecting abnormal temperature of an AC adapter.
【０００２】[0002]
【従来の技術】従来方式について図面を参照して説明す
る。図２は従来の温度異常検出保護回路の一例を示す図
である。2. Description of the Related Art A conventional system will be described with reference to the drawings. FIG. 2 is a diagram showing an example of a conventional temperature abnormality detection protection circuit.
【０００３】この従来の保護回路はＡＣアダプタの内部
の温度検出用サーミスタを備える。This conventional protection circuit includes a temperature detecting thermistor inside the AC adapter.
【０００４】ＡＣアダプタ回路１の制御部に温度検出用
のサーミスタ２が接続される。ＡＣアダプタ内部が何ら
かの理由で異常温度に達した際にサーミスタ２がＯＮ
し、ＡＣアダプタ回路１がそれを検出してＡＣアダプタ
出力が遮断される。A thermistor 2 for temperature detection is connected to a control section of the AC adapter circuit 1. Thermistor 2 turns on when the temperature inside the AC adapter reaches an abnormal temperature for some reason
Then, the AC adapter circuit 1 detects this, and the AC adapter output is cut off.
【０００５】[0005]
【発明が解決しようとする課題】しなしながら、従来の
温度異常検出保護回路によると、ＡＣアダプタ温度が異
常に高くなった場合、使用者に警告無しで出力をＯＦＦ
するため、何が原因でＯＦＦしたのかが判断できない。However, according to the conventional temperature abnormality detection protection circuit, when the AC adapter temperature becomes abnormally high, the output is turned off without warning the user.
Therefore, it is not possible to determine what caused the OFF.
【０００６】また、保護回路が働いた際、使用者は不意
に作業の中断を強いられる他、情報機器装置においては
処理中のファイルが破壊される可能性があった。Further, when the protection circuit is activated, the user is forced to interrupt the operation unexpectedly, and the file being processed in the information equipment may be destroyed.
【０００７】そこで本発明は、ＡＣアダプタが温度異常
になったときに、これを使用者に知らせ、即座にＡＣア
ダプタの出力をＯＦＦにしないで、機器の消費電力を低
減してファイル退避などの退避作業を可能にするＡＣア
ダプタの温度異常検出保護回路を提供することを目的と
する。Accordingly, the present invention provides a method of notifying a user of an abnormal temperature of an AC adapter when the temperature of the AC adapter becomes abnormal, and without immediately turning off the output of the AC adapter, reducing the power consumption of the device and saving a file. An object of the present invention is to provide an AC adapter temperature abnormality detection protection circuit that enables evacuation work.
【０００８】[0008]
【課題を解決するための手段】本発明による温度異常検
出保護回路は、電子機器に電源を供給するＡＣアダプタ
の温度異常を検出して、該ＡＣアダプタを保護する温度
異常検出保護回路において、ＡＣアダプタの温度を検出
して、該温度が所定の異常値に達したときにアクティブ
になる温度異常検出信号を出力する温度検出回路と、前
記温度異常検出信号を入力し、低消費電力化指示信号を
出力して、前記温度異常検出信号がアクティブになった
ときに前記低消費電力化指示信号をアクティブにし、前
記温度異常検出信号がアクティブになってから一定時間
後に前記温度異常検出信号がディアクティブになってい
る場合に、前記低消費電力化指示信号をディアクティブ
にする電力制御部と、前記低消費電力化指示信号を入力
し、前記低消費電力化指示信号がアクティブなときに、
前記電子機器の機器回路の機能制限をする機能制御部と
を備えることを特徴とする。SUMMARY OF THE INVENTION A temperature abnormality detection and protection circuit according to the present invention detects a temperature abnormality of an AC adapter that supplies power to an electronic device and protects the AC adapter. A temperature detection circuit that detects the temperature of the adapter and outputs a temperature abnormality detection signal that becomes active when the temperature reaches a predetermined abnormal value; and a power consumption instruction signal that receives the temperature abnormality detection signal and receives the temperature abnormality detection signal. To activate the low power consumption instruction signal when the temperature abnormality detection signal becomes active, and the temperature abnormality detection signal becomes inactive after a predetermined time from when the temperature abnormality detection signal becomes active. And a power control unit that deactivates the low power consumption instruction signal, and receives the low power consumption instruction signal and inputs the low power consumption instruction signal. When reduction instruction signal is active,
A function control unit for restricting a function of a device circuit of the electronic device.
【０００９】また、本発明による温度異常検出保護回路
は、ＡＣアダプタ出力を遮断する出力制御部を更に備
え、前記電力制御部は電源断信号を前記出力制御部に出
力し、前記温度異常検出信号がアクティブになってから
一定時間後に前記温度異常検出信号がディアクティブに
なっていない場合に、前記電源断信号をアクティブに
し、前記出力制御部は、前記電源断信号がアクティブに
なったときに、前記ＡＣアダプタの出力を遮断すること
を特徴とすることを特徴とする。Further, the temperature abnormality detection protection circuit according to the present invention further comprises an output control unit for interrupting an AC adapter output, wherein the power control unit outputs a power cutoff signal to the output control unit, and the temperature abnormality detection signal When the temperature abnormality detection signal has not been deactivated after a certain period of time after being activated, activates the power-off signal, and the output control unit, when the power-off signal is activated, The output of the AC adapter is shut off.
【００１０】更に、本発明による温度異常検出保護回路
は、前記温度検出回路は、更に前記ＡＣアダプタの温度
が限界値に達したときにアクティブになる温度限界検出
信号を前記電力制御部に出力し、前記電力制御部は、前
記温度限界検出信号がアクティブになったときに、前記
電源断信号をアクティブにすることを特徴とする。Further, in the temperature abnormality detection and protection circuit according to the present invention, the temperature detection circuit further outputs a temperature limit detection signal, which becomes active when the temperature of the AC adapter reaches a limit value, to the power control unit. The power control unit activates the power cutoff signal when the temperature limit detection signal becomes active.
【００１１】更に、本発明による温度異常検出保護回路
は、前記ＡＣアダプタの温度異常を表示する異常表示部
を更に備え、前記電力制御部は、更に異常表示指示信号
を前記異常表示部に出力し、前記温度異常検出信号がア
クティブになったときに、前記異常表示指示信号をアク
ティブにし、前記異常表示部は前記異常表示指示信号が
アクティブになったときに異常表示をすることを特徴と
する。Further, the temperature abnormality detection and protection circuit according to the present invention further comprises an abnormality display section for displaying an abnormality in the temperature of the AC adapter, and the power control section further outputs an abnormality display instruction signal to the abnormality display section. When the temperature abnormality detection signal becomes active, the abnormality display instruction signal is activated, and the abnormality display section displays an abnormality when the abnormality display instruction signal becomes active.
【００１２】[0012]
【発明の実施例】本発明について図面を参照して説明す
る。図１は、本発明の一実施例を示すブロック図であ
る。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing one embodiment of the present invention.
【００１３】図１において、中核部１は、ＡＣアダプタ
内の温度異常を検出し、温度が異常値に達したときに温
度異常検出信号１０をアクティブして、更に温度が上昇
したときに温度限界検出信号１１をアクティブにする温
度検出回路２と、温度異常検出信号１０と温度限界検出
信号１１を入力し、機能制御部４に低消費電力化指示信
号１２を出力し、異常表示部５に異常表示指示信号１３
を出力し、出力制御部８に電源断信号１４を出力する電
力制御部３と、例えばＬＥＤなどの温度異常を表示する
異常表示部５を備えている。In FIG. 1, a core unit 1 detects a temperature abnormality in an AC adapter, activates a temperature abnormality detection signal 10 when the temperature reaches an abnormal value, and activates a temperature limit when the temperature further rises. The temperature detection circuit 2 for activating the detection signal 11, the temperature abnormality detection signal 10 and the temperature limit detection signal 11 are input, a low power consumption instructing signal 12 is output to the function control unit 4, and the abnormality display unit 5 has an abnormality. Display instruction signal 13
And a power control unit 3 for outputting a power-off signal 14 to the output control unit 8 and an abnormality display unit 5 for displaying temperature abnormality such as an LED.
【００１４】次に動作について説明する。Next, the operation will be described.
【００１５】電力制御部３は温度検出回路２の温度異常
検出信号がアクティブになったとき、機器の機能を限定
するために、電子機器内の機能制御部４に出力している
低消費電力化指示信号１２をアクティブし、異常表示部
５に出力している異常表示指示信号をアクティブにす
る。すると、機能制御部４は機器回路６の動作可能な機
能をファイルのバックアップなどの特定の機能だけに制
限する。また、異常表示部５は温度異常を表示する。When the temperature abnormality detection signal of the temperature detection circuit 2 becomes active, the power control unit 3 reduces the power consumption output to the function control unit 4 in the electronic device in order to limit the functions of the device. The instruction signal 12 is activated, and the abnormality display instruction signal output to the abnormality display section 5 is activated. Then, the function control unit 4 limits the operable functions of the device circuit 6 to only specific functions such as file backup. Further, the abnormality display section 5 displays a temperature abnormality.
【００１６】機能制御部４が機器回路６の機能制限を行
うと、機器内電源回路７から供給されるべき電力を低減
するので、ＡＣアダプタ出力部９からの供給電力が低減
され、ＡＣアダプタの温度が低下する。When the function control unit 4 restricts the function of the equipment circuit 6, the power to be supplied from the power supply circuit 7 in the equipment is reduced, so that the power supplied from the AC adapter output unit 9 is reduced, and the power of the AC adapter is reduced. The temperature drops.
【００１７】この時、電力制御部３は、ＡＣアダプタの
温度が所定の時間を経過しても低下しない場合、ＡＣア
ダプタの出力制御部８に出力している電源断信号１４を
アクティブにし、出力制御部８は、ＡＣアダプタ出力部
９を切断する。At this time, when the temperature of the AC adapter does not decrease even after the elapse of a predetermined time, the power control unit 3 activates the power cutoff signal 14 output to the output control unit 8 of the AC adapter, and The control unit 8 disconnects the AC adapter output unit 9.
【００１８】また、機能制限した後にも温度が更に上昇
し続けた場合、温度限界検出信号１１がアクティブにな
り、これを検出した電力制限回路３は所定の時間の経過
を待たず、ＡＣアダプタの出力制御回路８に出力してい
る電源断信号１４をアクティブにし、出力制御部８は、
ＡＣアダプタ出力部９を切断する。Further, if the temperature continues to rise even after the function is limited, the temperature limit detection signal 11 becomes active, and the power limiter circuit 3 detecting this detects the AC adapter without waiting for a predetermined time. The power-off signal 14 output to the output control circuit 8 is activated, and the output control unit 8
The AC adapter output unit 9 is disconnected.
【００１９】ＡＣアダプタの温度が一定時間内に正常温
度に復帰した場合、温度異常検出信号１０はディアクテ
ィブになる。これを検出した電力制御部３は機能制御部
４に出力している低消費電力化指示信号１２をディアク
ティブに戻して通常消費電力化指示を行い、これを受け
た機能制御部４は機能制限を解除し、通常の消費電力状
態に復帰させる。また、電力制御部３は異常表示指示信
号１３をディアクティブに戻し、異常表示部５は異常表
示を中止する。When the temperature of the AC adapter returns to the normal temperature within a predetermined time, the temperature abnormality detection signal 10 becomes inactive. Upon detecting this, the power control unit 3 returns the power saving instruction signal 12 output to the function control unit 4 to the inactive state and issues a normal power consumption instruction. Is released, and the state returns to the normal power consumption state. In addition, the power control unit 3 returns the abnormality display instruction signal 13 to inactive, and the abnormality display unit 5 stops displaying the abnormality.
【００２０】[0020]
【発明の効果】以上説明したように本発明によれば、使
用中に温度異常であることを表示にすることにより、使
用者がこれを認識できるので、ＡＣアダプタ温度異常時
において、早期にその異常に対応できる。As described above, according to the present invention, by displaying the fact that the temperature is abnormal during use, the user can recognize the temperature abnormality. Can respond to abnormalities.
【００２１】また、温度異常検出時に即座にＡＣアダプ
タの出力を切断しないで、機器の機能を限定するので、
使用中のファイルの退避などの退避動作をすることがで
きて、ファイルを破壊したりすることなどを防ぐことが
できる。Further, since the output of the AC adapter is not immediately cut off when the temperature abnormality is detected, the function of the device is limited.
A saving operation such as saving a file in use can be performed, thereby preventing the file from being destroyed.
【００２２】更に、ＡＣアダプタの温度が偶然に布等で
覆われるなどの原因により異常温度まで上昇してしまい
機能制限が働いた場合に、機能制限が働いたことを使用
者が知ることにより、ＡＣアダプタを見て、この原因を
明確に判断することができるのでＡＣアダプタの使用環
境を改善させることができる。Further, when the temperature of the AC adapter rises to an abnormal temperature due to accidentally being covered with a cloth or the like and the function is restricted, the user knows that the function is restricted, and By looking at the AC adapter, the cause can be clearly determined, so that the usage environment of the AC adapter can be improved.
【図１】本発明によるＡＣアダプタの温度異常検出保護
回路である。FIG. 1 is a protection circuit for detecting abnormal temperature of an AC adapter according to the present invention.
【図２】従来例の温度異常検出保護回路である。FIG. 2 is a conventional temperature abnormality detection protection circuit.
１ 中核部 ２ 温度検出回路 ３ 電力制御部 ４ 機能制御部 ５ 異常表示部 ６ 機器回路 ７ 機器内電源回路 ８ 出力制御部 ９ ＡＣアダプタ出力部 １０ 温度異常検出信号 １１ 温度限界検出信号 １２ 低消費電力化指示信号 １３ 異常表示指示信号 １４ 電源断信号 DESCRIPTION OF SYMBOLS 1 Core part 2 Temperature detection circuit 3 Power control part 4 Function control part 5 Abnormal display part 6 Equipment circuit 7 Power supply circuit in equipment 8 Output control part 9 AC adapter output part 10 Temperature abnormality detection signal 11 Temperature limit detection signal 12 Low power consumption Instruction signal 13 Error display instruction signal 14 Power off signal
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ Ｈ０３Ｋ 17/08 Ｇ０６Ｆ 1/00 ３４１Ｑ ３４１Ｐ ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 6 Identification code FI H03K 17/08 G06F 1/00 341Q 341P
Claims (4)
の温度異常を検出して、該ＡＣアダプタを保護する温度
異常検出保護回路において、 ＡＣアダプタの温度を検出して、該温度が所定の異常値
に達したときにアクティブになる温度異常検出信号を出
力する温度検出回路と、 前記温度異常検出信号を入力し、低消費電力化指示信号
を出力して、前記温度異常検出信号がアクティブになっ
たときに前記低消費電力化指示信号をアクティブにし、
前記温度異常検出信号がアクティブになってから一定時
間後に前記温度異常検出信号がディアクティブになって
いる場合に、前記低消費電力化指示信号をディアクティ
ブにする電力制御部と、 前記低消費電力化指示信号を入力し、前記低消費電力化
指示信号がアクティブなときに、前記電子機器の機器回
路の機能制限をする機能制御部とを備えることを特徴と
する温度異常検出保護回路。A temperature abnormality detection and protection circuit for detecting a temperature abnormality of an AC adapter that supplies power to an electronic device and protecting the AC adapter, detects a temperature of the AC adapter, and detects a predetermined abnormality in the temperature of the AC adapter. A temperature detection circuit that outputs a temperature abnormality detection signal that becomes active when the temperature has reached a value, the temperature abnormality detection signal is input, a low power consumption instruction signal is output, and the temperature abnormality detection signal becomes active. When the low power consumption instruction signal is activated,
A power control unit that deactivates the low power consumption instruction signal when the temperature abnormality detection signal is inactive after a predetermined time from when the temperature abnormality detection signal becomes active; and And a function control unit for inputting an activation instruction signal and restricting a function of a device circuit of the electronic device when the low power consumption instruction signal is active.
を更に備え、 前記電力制御部は電源断信号を前記出力制御部に出力
し、前記温度異常検出信号がアクティブになってから一
定時間後に前記温度異常検出信号がディアクティブにな
っていない場合に、前記電源断信号をアクティブにし、 前記出力制御部は、前記電源断信号がアクティブになっ
たときに、前記ＡＣアダプタの出力を遮断することを特
徴とすることを特徴とする請求項１に記載の温度異常検
出保護回路。2. An output control unit for interrupting an AC adapter output, wherein the power control unit outputs a power-off signal to the output control unit, and the power control unit outputs the power failure signal after a predetermined time from when the temperature abnormality detection signal becomes active. When the temperature abnormality detection signal is not deactivated, the power supply cutoff signal is made active, and the output control unit cuts off the output of the AC adapter when the power supply cutoff signal becomes active. The temperature abnormality detection protection circuit according to claim 1, wherein:
プタの温度が限界値に達したときにアクティブになる温
度限界検出信号を前記電力制御部に出力し、 前記電力制御部は、前記温度限界検出信号がアクティブ
になったときに、前記電源断信号をアクティブにするこ
とを特徴とする請求項２に記載の温度異常検出保護回
路。3. The temperature detection circuit further outputs a temperature limit detection signal, which becomes active when the temperature of the AC adapter reaches a limit value, to the power control unit. 3. The temperature abnormality detection protection circuit according to claim 2, wherein the power-off signal is activated when the detection signal is activated.
異常表示部を更に備え、 前記電力制御部は、更に異常表示指示信号を前記異常表
示部に出力し、前記温度異常検出信号がアクティブにな
ったときに、前記異常表示指示信号をアクティブにし、 前記異常表示部は前記異常表示指示信号がアクティブに
なったときに異常表示をすることを特徴とする請求項１
乃至３のいずれか１項に記載の温度異常検出保護回路。4. An abnormality display unit for displaying an abnormal temperature of the AC adapter, wherein the power control unit further outputs an abnormal display instruction signal to the abnormal display unit, and the abnormal temperature detection signal becomes active. The abnormality display instruction signal is activated when the abnormality display instruction signal is activated, and the abnormality display unit performs an abnormality display when the abnormality display instruction signal is activated.
The temperature abnormality detection protection circuit according to any one of claims 1 to 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9168454A JPH1118430A (en) | 1997-06-25 | 1997-06-25 | Temperature failure detection protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9168454A JPH1118430A (en) | 1997-06-25 | 1997-06-25 | Temperature failure detection protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1118430A true JPH1118430A (en) | 1999-01-22 |
Family
ID=15868417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9168454A Pending JPH1118430A (en) | 1997-06-25 | 1997-06-25 | Temperature failure detection protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1118430A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6366475B2 (en) | 1999-08-31 | 2002-04-02 | Fujitsu Limited | Power control method and circuit, and power supply unit |
| JP2009106010A (en) * | 2007-10-19 | 2009-05-14 | Sanyo Electric Co Ltd | Power supply system |
| JP2009225610A (en) * | 2008-03-18 | 2009-10-01 | Nec Access Technica Ltd | Electronic equipment system and method of manufacturing the same |
| WO2012060811A1 (en) * | 2010-11-01 | 2012-05-10 | Hewlett-Packard Development Company, L.P. | Power delivery systems and methods |
| CN104238596A (en) * | 2013-12-23 | 2014-12-24 | 深圳市邦彦信息技术有限公司 | Adjusting system for working temperature of electronic equipment and switching power supply device |
-
1997
- 1997-06-25 JP JP9168454A patent/JPH1118430A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6366475B2 (en) | 1999-08-31 | 2002-04-02 | Fujitsu Limited | Power control method and circuit, and power supply unit |
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| JP2009225610A (en) * | 2008-03-18 | 2009-10-01 | Nec Access Technica Ltd | Electronic equipment system and method of manufacturing the same |
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