JPH02137008A - Stabilized power supply circuit - Google Patents
Stabilized power supply circuitInfo
- Publication number
- JPH02137008A JPH02137008A JP63290059A JP29005988A JPH02137008A JP H02137008 A JPH02137008 A JP H02137008A JP 63290059 A JP63290059 A JP 63290059A JP 29005988 A JP29005988 A JP 29005988A JP H02137008 A JPH02137008 A JP H02137008A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- output
- abnormal
- output voltage
- section
- 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.)
- Granted
Links
- 230000002159 abnormal effect Effects 0.000 claims abstract description 52
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 38
- 238000001514 detection method Methods 0.000 claims abstract description 30
- 238000012544 monitoring process Methods 0.000 claims description 14
- 230000001105 regulatory effect Effects 0.000 claims description 13
- 230000006641 stabilisation Effects 0.000 claims description 6
- 238000011105 stabilization Methods 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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- Power Sources (AREA)
- Test And Diagnosis Of Digital Computers (AREA)
- Continuous-Control Power Sources That Use Transistors (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、コンピュータ等の負荷の試験をするために常
に安定した電圧で負荷に電源を供給する安定化電源回路
に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a stabilized power supply circuit that always supplies power to a load at a stable voltage in order to test a load such as a computer.
コンピュータ等の負荷が電源電圧の変動時にも正常に動
作する必要のある場合に、例えば電圧のマージンテスト
を行うが、このような試験に使用される出力電圧可変の
安定化電源回路の一例を第２図に示す。For example, a voltage margin test is performed when a load such as a computer must operate normally even when the power supply voltage fluctuates.This section describes an example of a stabilized power supply circuit with variable output voltage used for such tests. Shown in Figure 2.
この安定化電源回路は、電圧安定化回路５１と、出力電
圧検出部５２と、異常電圧監視部５３と、出力電圧可変
部５４とから成り、コンピュータ等の負荷に安定した電
圧を供給する。This stabilized power supply circuit includes a voltage stabilizing circuit 51, an output voltage detecting section 52, an abnormal voltage monitoring section 53, and an output voltage variable section 54, and supplies a stable voltage to a load such as a computer.
電圧安定化回路５１は、この回路の出力電圧値が一定に
なるよう出力電圧検出部５２に制御されている。出力電
圧検出部５２は、誤差増幅器５５．基準電圧源５７．抵
抗５９．抵抗６０から構成され、電圧安定化回路５１の
出力電圧を検出し電圧安定化回路５１を制御するための
制御信号を電圧安定化回路５１に出力する。異常電圧監
視部５３は、異常電圧検出器５６゜基準電圧源５８．抵
抗６１〜６４から構成され、電圧安定化回路５１の出力
電圧が異常に高くなったときに電圧安定化回路５１に動
作の停止を指示する。この指示は、抵抗６１．６２より
成る分圧回路の分圧点６７と抵抗６３．６４より成る分
圧点６８の電圧が異常電圧検出器５６で比較され、分圧
点６７の電圧が分圧点６８の電圧よりも高くなった場合
に異常電圧検出器５６より出力される。比較される分圧
点６７の電圧は、電圧安定化回路５１の出力電圧が抵抗
６１及び抵抗６２で分圧されたものであり、分圧点６８
の電圧は基準電圧源５８が抵抗６３．６４で分圧された
ものである。The voltage stabilizing circuit 51 is controlled by the output voltage detecting section 52 so that the output voltage value of this circuit is constant. The output voltage detection section 52 includes an error amplifier 55. Reference voltage source 57. Resistance59. It is composed of a resistor 60, detects the output voltage of the voltage stabilizing circuit 51, and outputs a control signal for controlling the voltage stabilizing circuit 51 to the voltage stabilizing circuit 51. The abnormal voltage monitoring unit 53 includes an abnormal voltage detector 56°, a reference voltage source 58. It is composed of resistors 61 to 64, and instructs the voltage stabilizing circuit 51 to stop its operation when the output voltage of the voltage stabilizing circuit 51 becomes abnormally high. This instruction is given when the abnormal voltage detector 56 compares the voltage at the voltage dividing point 67 of the voltage dividing circuit made up of resistors 61.62 and the voltage at the voltage dividing point 68 made up of the resistors 63.64, and the voltage at the voltage dividing point 67 becomes the divided voltage. When the voltage becomes higher than the voltage at point 68, the abnormal voltage detector 56 outputs an output. The voltage at the voltage dividing point 67 to be compared is the output voltage of the voltage stabilizing circuit 51 divided by the resistor 61 and the resistor 62, and the voltage at the voltage dividing point 68
The voltage is obtained by dividing the reference voltage source 58 by resistors 63 and 64.
また、異常電圧監視部５３から指示が出される異常高電
圧検出値の設定は、基準電圧源５８が分圧された分圧点
６８の基準電圧値によって決められる。出力電圧可変部
５４は、抵抗６５．調整電圧源７０で構成され、調整電
圧源７０が抵抗６５を介して出力電圧検出部５２の分圧
点６６に接続されており、調整電圧源７０の電圧を変化
させることにより電圧安定化回路５１の出力電圧を可変
させる。Further, the setting of the abnormal high voltage detection value instructed by the abnormal voltage monitoring section 53 is determined by the reference voltage value at the voltage division point 68 where the reference voltage source 58 is divided. The output voltage variable section 54 includes a resistor 65. The regulated voltage source 70 is connected to the voltage dividing point 66 of the output voltage detection section 52 via a resistor 65, and the voltage stabilizing circuit 51 is configured by changing the voltage of the regulated voltage source 70. to vary the output voltage.
以上のように構成される従来の安定化電源回路は、異常
電圧監視部５３の異常高電圧検出値が基準電圧源５８と
抵抗６３．６４より成る分圧回路で定まる一定の基準電
圧値で決められており、電圧安定化回路５１の出力電圧
を出力電圧可変部５４により変化させても異常高電圧検
出値自体は変わらなかった。In the conventional stabilized power supply circuit configured as described above, the abnormal high voltage detection value of the abnormal voltage monitoring section 53 is determined by a constant reference voltage value determined by a voltage divider circuit consisting of a reference voltage source 58 and resistors 63 and 64. Therefore, even if the output voltage of the voltage stabilizing circuit 51 was changed by the output voltage variable section 54, the abnormal high voltage detection value itself did not change.
従って従来の安定化電源回路は、試験するコンピュータ
等の負荷の電源仕様が負荷によって異なり、電圧安定化
回路５１の出力電圧とこの出力電圧に対する異常電圧検
出値を変更させる必要がある場合に、出力電圧可変部５
４からの調整電圧を調整することによって電圧安定化回
路５１の出力電圧を変化させ、及び分圧点６８の基準電
圧値を変化させることにより異常電圧検出値を変更させ
ていた。Therefore, when the power supply specifications of a load such as a computer to be tested differ depending on the load, and it is necessary to change the output voltage of the voltage stabilization circuit 51 and the abnormal voltage detection value for this output voltage, the conventional stabilized power supply circuit can output Voltage variable section 5
The output voltage of the voltage stabilizing circuit 51 is changed by adjusting the adjustment voltage from 4, and the abnormal voltage detection value is changed by changing the reference voltage value of the voltage dividing point 68.
しかし、出力電圧を変えるごとに異常電圧検出値を変更
することは面倒であり、変更に多くの時間を必要とした
。このような異常電圧検出値のその都度の変更をしない
で、異常高電圧検出値を調整電圧ａｌＸ７０で可変でき
る出力電圧の最高値以上の一定値に設定する場合には、
異常高電圧検出値の設定が大きくなりすぎて出力電圧が
異常に高くなったときに異常を検出できないという欠点
があった。However, changing the abnormal voltage detection value every time the output voltage is changed is troublesome and requires a lot of time. When setting the abnormal high voltage detection value to a constant value higher than the maximum value of the output voltage that can be varied with the adjustment voltage alX70 without changing the abnormal voltage detection value each time,
There is a drawback that an abnormality cannot be detected when the abnormal high voltage detection value is set too high and the output voltage becomes abnormally high.
本発明の目的は、以上のような不便さを解消し、出力電
圧を可変させると、この出力電圧に比例して異常高電圧
検出値を設定でき検出できる安定化電源回路を提供する
ことにある。An object of the present invention is to eliminate the above-mentioned inconvenience and provide a stabilized power supply circuit that can set and detect an abnormal high voltage detection value in proportion to the output voltage by varying the output voltage. .
本発明は、安定化した出力電圧を出力する電圧安定化部
と、この電圧安定化部の前記出力電圧を検出し、前記電
圧安定化部を制御する出力電圧検出部と、調整電圧源の
電圧を変化させ前記出力電圧検出部に与えることにより
前記出力電圧を変化させる出力電圧可変部と、前記出力
電圧を分圧する第１の分圧回路の分圧点の電圧と、基準
電圧を分圧する第２の分圧回路の分圧点の電圧とを比較
し、前記第２の分圧回路の分圧点の電圧で設定される異
常電圧を検出すると前記電圧安定化部の動作を停止させ
る異常電圧監視部とを有する安定化電源回路において、
前記出力電圧可変部の調整電圧源を接続手段を介して前
記異常電圧監視部の前記第２の分圧回路の分圧点に接続
し、前記出力電圧に比例して前記異常電圧の検出値を変
化させることを特徴とする。The present invention includes a voltage stabilizing section that outputs a stabilized output voltage, an output voltage detecting section that detects the output voltage of the voltage stabilizing section and controls the voltage stabilizing section, and a voltage of a regulated voltage source. an output voltage variable section that changes the output voltage by varying the output voltage and supplies it to the output voltage detection section; a voltage at a dividing point of a first voltage dividing circuit that divides the output voltage; an abnormal voltage that stops the operation of the voltage stabilizing section when an abnormal voltage set by the voltage at the voltage dividing point of the second voltage dividing circuit is detected by comparing the voltage at the voltage dividing point of the second voltage dividing circuit; A stabilized power supply circuit having a monitoring section, wherein the regulated voltage source of the output voltage variable section is connected to a voltage dividing point of the second voltage dividing circuit of the abnormal voltage monitoring section via a connecting means, and the output voltage It is characterized in that the detected value of the abnormal voltage is changed in proportion to.
次に、本発明の実施例について図面を参照して説明する
。Next, embodiments of the present invention will be described with reference to the drawings.
第１図は本発明の一実施例を示す回路図である。FIG. 1 is a circuit diagram showing an embodiment of the present invention.
この安定化電源回路は、電圧安定化回路１と、出力電圧
検出部２と、異常電圧監視部３と、出力電圧可変部４と
、異常電圧監視部３と出力電圧可変部４とを接続する接
続部２１とを備えている。This stabilized power supply circuit connects a voltage stabilizing circuit 1, an output voltage detection section 2, an abnormal voltage monitoring section 3, an output voltage variable section 4, an abnormal voltage monitoring section 3, and an output voltage variable section 4. A connecting portion 21 is provided.
電圧安定化回路ｌは、例えばパワートランジスタのスイ
ッチング素子等から成っており、電圧安定化回路１の入
力電圧等が変動しても出力電圧検出部２からの制御信号
により出力電圧を一定にするよう動作する。The voltage stabilizing circuit 1 is made up of, for example, a switching element such as a power transistor, and is configured to keep the output voltage constant by a control signal from the output voltage detecting section 2 even if the input voltage of the voltage stabilizing circuit 1 fluctuates. Operate.
出力電圧検出部２は、例えばオペアンプより成る誤差増
幅器５と、基準電圧源７と、抵抗９．抵抗１０より成り
電圧安定化回路１の出力電圧を分圧する分圧回路とから
構成され、電圧安定化回路ｌの出力電圧を検出し、出力
電圧の制御に必要な制御信号を電圧安定化回路１に出力
する。The output voltage detection section 2 includes an error amplifier 5 made of, for example, an operational amplifier, a reference voltage source 7, and a resistor 9. It is composed of a voltage dividing circuit that divides the output voltage of the voltage stabilizing circuit 1, which is made up of a resistor 10, and detects the output voltage of the voltage stabilizing circuit 1, and sends a control signal necessary for controlling the output voltage to the voltage stabilizing circuit 1. Output to.
異常電圧監視部３は、例えばコンパレータより成る異常
電圧検出器６と、抵抗１１．抵抗１２より成り電圧安定
化回路ｌの出力電圧を分圧する分圧回路と、基準電圧源
８と、抵抗１３．抵抗１４より成り基準電圧源８の電圧
を分圧する分圧回路とから構成され、電圧安定化回路ｌ
の出力電圧を検出し常時監視して、この出力電圧が異常
に高くなったときに電圧安定化回路１に対して停止を指
示する。The abnormal voltage monitoring section 3 includes an abnormal voltage detector 6 composed of, for example, a comparator, and a resistor 11 . A voltage dividing circuit that divides the output voltage of the voltage stabilizing circuit l, which is made up of a resistor 12, a reference voltage source 8, and a resistor 13. The voltage stabilizing circuit consists of a resistor 14 and a voltage dividing circuit that divides the voltage of the reference voltage source 8.
The output voltage is detected and constantly monitored, and when this output voltage becomes abnormally high, the voltage stabilizing circuit 1 is instructed to stop.
出力電圧可変部４は、抵抗１５．調整電圧源２０から構
成され、電圧安定化回路１の出力電圧の調整を行う。The output voltage variable section 4 includes a resistor 15. It is composed of an regulated voltage source 20 and adjusts the output voltage of the voltage stabilizing circuit 1.
調整電圧源２０は抵抗１５を介して抵抗９．抵抗１０よ
り成る分圧回路の分圧点１７に接続され、分圧点１７は
誤差増幅器５の一方の入力端子に接続されている。この
誤差増幅器５の他方の入力端子には基準電圧源７が接続
されている。抵抗１１．抵抗１２より成る分圧回路の分
圧点１８は異常電圧検出器６の一方の入力端子に接続さ
れ、異常電圧検出器６の他方の入力端子には基準電圧源
８の電圧を抵抗１３゜抵抗１４で分圧する分圧回路の分
圧点１９に接続されている。更に、分圧点１９は接続部
２１の抵抗１６を介して出力電圧可変部４の調整電圧源
２０に接続されている。The regulated voltage source 20 is connected to a resistor 9 through a resistor 15. It is connected to a voltage dividing point 17 of a voltage dividing circuit made up of a resistor 10, and the voltage dividing point 17 is connected to one input terminal of the error amplifier 5. A reference voltage source 7 is connected to the other input terminal of the error amplifier 5. Resistance 11. A voltage dividing point 18 of a voltage dividing circuit consisting of a resistor 12 is connected to one input terminal of an abnormal voltage detector 6, and the voltage of a reference voltage source 8 is connected to the other input terminal of the abnormal voltage detector 6 through a resistor 13. It is connected to a voltage dividing point 19 of a voltage dividing circuit that divides the voltage at 14. Furthermore, the voltage dividing point 19 is connected to the regulated voltage source 20 of the output voltage variable section 4 via the resistor 16 of the connection section 21 .
この安定化電源回路が従来の安定化電源回路と構造的に
異なる点は、調整電圧源２０が接続部２１の抵抗１６を
介して抵抗１３．抵抗１４より成る分圧回路の分圧点１
９に接続されていることである。This stabilized power supply circuit is structurally different from conventional stabilized power supply circuits in that the regulated voltage source 20 is connected to the resistor 13 through the resistor 16 of the connecting portion 21. Voltage dividing point 1 of the voltage dividing circuit consisting of resistor 14
9.
次に、本実施例の動作について説明する。電圧安定化回
路ｌが一定の電圧を出力しているとき、この出力電圧は
、出力電圧検出部２及び異常電圧監視部３によって検出
され、抵抗９，１０の分圧回路及び抵抗１１．１２の分
圧回路で分圧され、誤差増幅器５及び異常電圧検出器６
に入力される。誤差増幅器５は、電圧安定化回路１の出
力電圧が抵抗９、ＩＯで分圧された分圧点１７の電圧と
基準電圧源７の電圧とを比較して、その誤差を制御信号
として電圧安定化回路ｌに出力する。電圧安定化回路ｌ
はこの制御信号により出力電圧を制御し、誤差増幅器５
の出力する誤差が零になるまで出力電圧を変化させる。Next, the operation of this embodiment will be explained. When the voltage stabilizing circuit 1 outputs a constant voltage, this output voltage is detected by the output voltage detecting section 2 and the abnormal voltage monitoring section 3, and is detected by the voltage dividing circuit of resistors 9 and 10 and the resistors 11 and 12. The voltage is divided by a voltage dividing circuit, and an error amplifier 5 and an abnormal voltage detector 6
is input. The error amplifier 5 compares the voltage at a voltage dividing point 17 obtained by dividing the output voltage of the voltage stabilizing circuit 1 by the resistor 9 and IO with the voltage at the reference voltage source 7, and uses the error as a control signal to stabilize the voltage. output to the conversion circuit l. Voltage stabilization circuit
controls the output voltage by this control signal, and the error amplifier 5
Vary the output voltage until the output error becomes zero.
この出力電圧は誤差増幅器５の出力の誤差が零になると
安定し一定値を保つ。また、異常電圧検出器６は、電圧
安定化回路１の出力電圧が抵抗１１．１２の分圧回路で
分圧された分圧点１８の電圧と、基準電圧源８が抵抗１
３．１４の分圧回路で分圧された分圧点１９の電圧であ
る基準電圧とを比較して分圧点１８の電圧が高いときに
電圧安定化回路ｌに停止信号を出力する。異常電圧検出
器６より停止信号が出される異常高電圧検出値は、分圧
点１８に対する分圧点１９の電圧で設定される。This output voltage becomes stable and maintains a constant value when the error in the output of the error amplifier 5 becomes zero. The abnormal voltage detector 6 also detects the voltage at a voltage dividing point 18 obtained by dividing the output voltage of the voltage stabilizing circuit 1 by a voltage dividing circuit of resistors 11 and 12, and the reference voltage source 8 that is
It compares the voltage at the voltage dividing point 19 divided by the voltage dividing circuit 3.14 with a reference voltage, and outputs a stop signal to the voltage stabilizing circuit 1 when the voltage at the voltage dividing point 18 is high. The abnormal high voltage detection value for which a stop signal is issued from the abnormal voltage detector 6 is set by the voltage at the voltage dividing point 19 with respect to the voltage dividing point 18 .
例えば、抵抗９．１０の分圧比と抵抗１１．１２の分圧
比が等しく１：１であり、出力電圧可変部２の基準電圧
源７の基準電圧が２．５ｖであるとする。For example, assume that the voltage dividing ratio of resistor 9.10 and that of resistor 11.12 are equal to 1:1, and the reference voltage of reference voltage source 7 of output voltage variable section 2 is 2.5V.
出力電圧可変部４から出力電圧検出部２に調整電圧が加
えられていない場合、誤差増幅器５が電圧安定化回路１
に出力する誤差が零となるように、すなわち分圧点１７
の電圧が２．５■となるように、電圧安定化回路１の出
力電圧は安定化されるから、安定化出力電圧は５Ｖとな
る。When the adjustment voltage is not applied from the output voltage variable section 4 to the output voltage detection section 2, the error amplifier 5 is connected to the voltage stabilization circuit 1.
so that the error output at
Since the output voltage of the voltage stabilizing circuit 1 is stabilized so that the voltage becomes 2.5V, the stabilized output voltage becomes 5V.
一方、異常高電圧検出値を出力電圧５■より２０％高い
６■に設定するとすれば、その出力電圧が６ｖのとき分
圧点１８の電圧は３■であるので、分圧点１９の電圧を
３■に設定することにより異常高電圧が設定できる。On the other hand, if the abnormal high voltage detection value is set to 6■ which is 20% higher than the output voltage 5■, the voltage at the voltage dividing point 18 is 3■ when the output voltage is 6V, so the voltage at the voltage dividing point 19 By setting 3■, abnormally high voltage can be set.
次に、出力電圧を変えるために出力電圧可変部４から出
力電圧検出部２に調整電圧が加えられた場合、調整電圧
源２０から抵抗１５を介して抵抗９゜１０の分圧回路の
分圧点１７に電圧が加えられ、抵抗１０には調整電圧源
２０からの電流も流れるため分圧点１７の電圧が変化す
る。分圧点１７の電圧が２．５Ｖから０．２５Ｖ下がっ
て２．２５Ｖになると、誤差増幅器５は、基準電圧源７
の基準電圧２．５■との誤差を制御信号として電圧安定
化回路１に出力する。電圧安定化回路ｌはその制御信号
を受けると、誤差増幅器５の出力が零となるように出力
電圧を０．５Ｖ上昇させ、出力電圧を５．５Ｖに安定化
する。Next, when an adjustment voltage is applied from the output voltage variable section 4 to the output voltage detection section 2 in order to change the output voltage, the voltage is divided from the adjustment voltage source 20 through the resistor 15 of the voltage divider circuit of resistors 9 and 10. A voltage is applied to point 17, and current from regulated voltage source 20 also flows through resistor 10, so that the voltage at voltage dividing point 17 changes. When the voltage at the voltage dividing point 17 drops by 0.25V from 2.5V to 2.25V, the error amplifier 5
The error from the reference voltage of 2.5cm is output to the voltage stabilizing circuit 1 as a control signal. When the voltage stabilizing circuit 1 receives the control signal, it increases the output voltage by 0.5V so that the output of the error amplifier 5 becomes zero, and stabilizes the output voltage to 5.5V.
このとき、異常電圧監視部３の分圧点１８の電圧は２．
７５Ｖに上昇する。ここで調整電圧源２０が抵抗１６を
介して分圧点１９に接続されていなければ、異常高電圧
検出値を設定する分圧点１９の基準電圧は以前設定され
た３Ｖのまま変化しないが、調整電圧源２０が分圧点１
９に接続されているため、調整電圧源２０を変化させる
ことにより分圧点１９の基準電圧、つまり異常高電圧検
出値を変化させることができる。At this time, the voltage at the voltage dividing point 18 of the abnormal voltage monitoring section 3 is 2.
Increases to 75V. If the regulated voltage source 20 is not connected to the voltage dividing point 19 via the resistor 16, the reference voltage at the voltage dividing point 19 for setting the abnormal high voltage detection value remains the previously set 3V, but Adjusted voltage source 20 is voltage dividing point 1
9, the reference voltage at the voltage dividing point 19, that is, the abnormal high voltage detection value, can be changed by changing the regulated voltage source 20.
電圧安定化回路ｌの出力電圧が５Ｖのとき、分圧点１８
の電圧が２．５■、分圧点１９の電圧が３■であったが
、出力電圧が５．５Ｖに変化すると、分圧点１９の基準
電圧は（３＋α）■になり異常高電圧検出値は２×（３
＋α）■に変化する。出力電圧が５Ｖのときの分圧点１
８と分圧点１９の電圧比３／２．５と、出力電圧が５．
５ｖのときの分圧点１８と分圧点１９の電圧比３＋α／
２．７５とが、同じ電圧比になるよう抵抗１３．１４．
１６を選択し、αを設定することにより、出力電圧が変
化しても、異常電圧検出値は、出力電圧に対して常に一
定の割合で変化する。従って異常高電圧検出値は１．電
圧安定化回路１の出力電圧に比例して変化する。よって
本実施例の安定化電源回路では、出力電圧に比例してそ
れよりも２０％大きい電圧を異常電圧として検出するこ
とが可能となる。When the output voltage of voltage stabilizing circuit l is 5V, voltage dividing point 18
The voltage at voltage division point 19 was 2.5V, and the voltage at voltage division point 19 was 3V, but when the output voltage changed to 5.5V, the reference voltage at voltage division point 19 became (3+α)■, and abnormal high voltage was detected. The value is 2×(3
+α) Changes to ■. Voltage division point 1 when the output voltage is 5V
8 and the voltage ratio of voltage dividing point 19 is 3/2.5, and the output voltage is 5.
Voltage ratio of voltage division point 18 and voltage division point 19 at 5V 3+α/
2.75, resistors 13.14.
By selecting 16 and setting α, even if the output voltage changes, the abnormal voltage detection value always changes at a constant rate with respect to the output voltage. Therefore, the abnormal high voltage detection value is 1. It changes in proportion to the output voltage of the voltage stabilizing circuit 1. Therefore, in the stabilized power supply circuit of this embodiment, it is possible to detect a voltage that is 20% larger than the output voltage as an abnormal voltage in proportion to the output voltage.
以上、本実施例の動作を抵抗９．ｌＯと抵抗１１゜１２
の分圧比が１：ｌで等しいとして説明したが、分圧比が
異なっていても、各分圧点の電圧や設定が変わるだけで
回路の動作は変わらない。尚、本実施例では、異常高電
圧を検出する場合を例にとり説明してきたが、異常低電
圧を検出する場合にも本発明を適用できることは明らか
である。As described above, the operation of this embodiment is explained using the resistor 9. lO and resistance 11°12
Although the explanation has been made assuming that the voltage division ratios are equal at 1:l, even if the voltage division ratios are different, the operation of the circuit will not change except that the voltage and setting of each voltage division point will change. Although the present embodiment has been described taking as an example the case of detecting an abnormally high voltage, it is clear that the present invention can also be applied to the case of detecting an abnormally low voltage.
以上説明したように本発明は、異常電圧の検出レベルを
電圧安定化回路の出力電圧に比例して設定することがで
きるため、異常電圧を確実に検出することが可能となる
。このため、この安定化電源回路の出力に接続されるコ
ンピュータ等の負荷の信顛性を高めることができる。As explained above, in the present invention, the abnormal voltage detection level can be set in proportion to the output voltage of the voltage stabilization circuit, so that the abnormal voltage can be reliably detected. Therefore, the reliability of a load such as a computer connected to the output of this stabilized power supply circuit can be improved.
第１図は本発明の一実施例を示す回路図、第２図は従来
の安定化電源回路の一例を示す回路図である。
１．５１・・・電圧安定化回路
２．５２・・・出力電圧検出部
３．５３・・・異常電圧監視部
４．５４・・・出力電圧可変部
５．５５・・・誤差増幅器
６．５６・・・異常電圧検出器
？、 ８．５７．５８・・・基準電圧源２０、７０・
・・調整電圧源FIG. 1 is a circuit diagram showing an embodiment of the present invention, and FIG. 2 is a circuit diagram showing an example of a conventional stabilized power supply circuit. 1.51... Voltage stabilizing circuit 2.52... Output voltage detection section 3.53... Abnormal voltage monitoring section 4.54... Output voltage variable section 5.55... Error amplifier 6. 56...Abnormal voltage detector? , 8.57.58...Reference voltage source 20, 70.
・Adjusted voltage source
Claims (1)
この電圧安定化部の前記出力電圧を検出し、前記電圧安
定化部を制御する出力電圧検出部と、調整電圧源の電圧
を変化させ前記出力電圧検出部に与えることにより前記
出力電圧を変化させる出力電圧可変部と、前記出力電圧
を分圧する第１の分圧回路の分圧点の電圧と、基準電圧
を分圧する第２の分圧回路の分圧点の電圧とを比較し、
前記第２の分圧回路の分圧点の電圧で設定される異常電
圧を検出すると前記電圧安定化部の動作を停止させる異
常電圧監視部とを有する安定化電源回路において、 前記出力電圧可変部の調整電圧源を接続手段を介して前
記異常電圧監視部の前記第２の分圧回路の分圧点に接続
し、前記出力電圧に比例して前記異常電圧の検出値を変
化させることを特徴とする安定化電源回路。(1) A voltage stabilizing section that outputs a stabilized output voltage;
an output voltage detection section that detects the output voltage of the voltage stabilization section and controls the voltage stabilization section; and an output voltage detection section that changes the voltage of an regulated voltage source and supplies the voltage to the output voltage detection section. The output voltage variable section compares a voltage at a voltage dividing point of a first voltage dividing circuit that divides the output voltage with a voltage at a voltage dividing point of a second voltage dividing circuit that divides the reference voltage,
A stabilized power supply circuit comprising: an abnormal voltage monitoring section that stops the operation of the voltage stabilizing section when an abnormal voltage set at a voltage dividing point of the second voltage dividing circuit is detected, the output voltage variable section A regulated voltage source is connected to a voltage dividing point of the second voltage dividing circuit of the abnormal voltage monitoring section through a connecting means, and the detected value of the abnormal voltage is changed in proportion to the output voltage. A stabilized power supply circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63290059A JP2841394B2 (en) | 1988-11-18 | 1988-11-18 | Stabilized power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63290059A JP2841394B2 (en) | 1988-11-18 | 1988-11-18 | Stabilized power supply circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02137008A true JPH02137008A (en) | 1990-05-25 |
| JP2841394B2 JP2841394B2 (en) | 1998-12-24 |
Family
ID=17751255
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63290059A Expired - Fee Related JP2841394B2 (en) | 1988-11-18 | 1988-11-18 | Stabilized power supply circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2841394B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002046854A1 (en) * | 2000-12-05 | 2002-06-13 | Sony Corporation | Power supply device, transistor driving method, recording medium |
| JP2010288404A (en) * | 2009-06-15 | 2010-12-24 | Fujitsu Telecom Networks Ltd | Variable power supply device, motor drive control device, and protection circuit operating method thereof |
| CN108227800A (en) * | 2016-12-09 | 2018-06-29 | 北京兆易创新科技股份有限公司 | A kind of regulator circuit |
-
1988
- 1988-11-18 JP JP63290059A patent/JP2841394B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002046854A1 (en) * | 2000-12-05 | 2002-06-13 | Sony Corporation | Power supply device, transistor driving method, recording medium |
| JP2010288404A (en) * | 2009-06-15 | 2010-12-24 | Fujitsu Telecom Networks Ltd | Variable power supply device, motor drive control device, and protection circuit operating method thereof |
| CN108227800A (en) * | 2016-12-09 | 2018-06-29 | 北京兆易创新科技股份有限公司 | A kind of regulator circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2841394B2 (en) | 1998-12-24 |
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