JPS61165113A - Constant-voltage power source unit - Google Patents
Constant-voltage power source unitInfo
- Publication number
- JPS61165113A JPS61165113A JP637185A JP637185A JPS61165113A JP S61165113 A JPS61165113 A JP S61165113A JP 637185 A JP637185 A JP 637185A JP 637185 A JP637185 A JP 637185A JP S61165113 A JPS61165113 A JP S61165113A
- Authority
- JP
- Japan
- Prior art keywords
- variation
- voltage power
- diode
- capacitor
- whose
- 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
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
- G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
- G05F1/565—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、電子機器等の定電圧電源装置に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a constant voltage power supply device for electronic equipment and the like.
従来の技術
近年、電力制御にトランジスタを用いた定電圧電源装置
が民生用電子機器に多く利用されている。2. Description of the Related Art In recent years, constant voltage power supplies using transistors for power control have been widely used in consumer electronic devices.
以下に一般的な定電圧電源装置について説明する。第２
図は一般的な定電圧電源装置のブロック図であり、同図
において１１は定電圧電源装置本体、２は交流電力全直
流電圧に変換し、定電圧電源装置本体１１に直流電力を
供給する整流装置、３は定電圧電源装置本体１１の負荷
である。４゜６は、定電圧電源装置本体１１０入力端子
で整流装置２の両端と接続され、入力端子６は整流装置
の一端と共に接地されている。６．７は、定電圧電源装
置本体１１の出力端子で、ここに負荷３の両端が接続さ
れている。A general constant voltage power supply device will be explained below. Second
The figure is a block diagram of a general constant voltage power supply. In the figure, 11 is the main body of the constant voltage power supply, and 2 is a rectifier that converts all AC power into DC voltage and supplies DC power to the main body 11 of the constant voltage power supply. The device 3 is a load of the constant voltage power supply main body 11. 4.6 is an input terminal of the constant voltage power supply main body 110, which is connected to both ends of the rectifier 2, and the input terminal 6 is grounded together with one end of the rectifier. 6.7 is an output terminal of the constant voltage power supply main body 11, to which both ends of the load 3 are connected.
定電圧電源装置本体１１は、基準電圧発生回路８と、フ
ィルター回路９と、直列制御回路１０とより構成されて
いる。The constant voltage power supply main body 11 includes a reference voltage generation circuit 8, a filter circuit 9, and a series control circuit 10.
更に具体的に説明すれば、従来の定電圧電源装置におい
ては、第３図に示すように、基準電圧発生回路８は、抵
抗８３と定電圧ダイオード８４で、フィルター回路９は
、抵抗９３とコンデンサー９４で、直列制御回路１０は
、制御用トランジスタ１２で、それぞれ構成されている
。More specifically, in the conventional constant voltage power supply device, as shown in FIG. At 94, the series control circuits 10 each include control transistors 12.
以上のように構成部れた従来０定電圧電源装置について
、以下、その動作に−ＨＲ，明する。The operation of the conventional zero constant voltage power supply device configured as described above will be explained below.
入力端子４から入った非安定化電源電圧は、基準電圧発
生回路８により基準電圧化され、さらに、フィノフー回
路９により、残留リップル変動分が除去され、直列制御
回路１０’（（構成している制御用トランジスタ１２の
ベースに加えられる。ここで、この制御用トランジスタ
１２は、コレクタ接地の構成となっているため、バッフ
ァーとして動 □作し、ベースの電圧は、その１寸
エミッタに出力されて、出力端子らと７両端間の出力と
々る。The unregulated power supply voltage input from the input terminal 4 is made into a reference voltage by the reference voltage generation circuit 8, and the residual ripple fluctuation is removed by the Finofu circuit 9, and the series control circuit 10' (consisting of The voltage is applied to the base of the control transistor 12. Since the control transistor 12 has a common collector configuration, it operates as a buffer, and the base voltage is output to its 1 inch emitter. , the output terminals and 7 output between both ends.
発明が解決しようとする問題点
しかしながら、上記の構成において、入力端子４の電圧
のリップル変動が非常に大きい場合、とのリップル変動
が増加側に変動した時にコンデンサ９４に蓄積された電
荷は、上記変動が減少側となった時に、抵抗８３．９３
によって放電されてし捷い、これにより、制御用トラン
ジスタ１２０ベース電位が変動し、これに伴って、出力
端子６゜７間の出力電圧が変動する。この大きなリップ
ル変動による、出力電圧の変動を抑えるためには、コン
デンサ９４の容量を大きくする必要があり、このため、
コンデンサ９４が大型化し、定電圧電源装置自体が犬き
くなるという問題点を有していた。Problems to be Solved by the Invention However, in the above configuration, if the ripple fluctuation of the voltage at the input terminal 4 is very large, the charge accumulated in the capacitor 94 when the ripple fluctuation changes to the increasing side is When the fluctuation is on the decreasing side, the resistance is 83.93
As a result, the base potential of the control transistor 120 fluctuates, and the output voltage between the output terminals 6 and 7 fluctuates accordingly. In order to suppress fluctuations in the output voltage due to this large ripple fluctuation, it is necessary to increase the capacitance of the capacitor 94.
There was a problem in that the capacitor 94 became large and the constant voltage power supply itself became unstable.
本発明は、−１−記従来の技術の問題点を解消し、リッ
プル変動にともなう出力電圧の変動を低減することので
きる定電圧電源装置を提供することを目的とする。SUMMARY OF THE INVENTION An object of the present invention is to provide a constant voltage power supply device that can solve the problems of the conventional technology described in -1- and reduce fluctuations in output voltage due to ripple fluctuations.
問題点を解決するだめの手段
本発明の定電圧電源装置は、出力電圧変動を低の
減するために、定電圧電源′回路フィルター回路をコン
デンサとダイオードで構成する。Means for Solving the Problems In the constant voltage power supply device of the present invention, the constant voltage power supply circuit filter circuit is constructed of a capacitor and a diode in order to reduce output voltage fluctuations.
作 用
本発明は−Ｊ二記したようにダイオードをフィルター回
路の構成部品とすることにより、入力電圧が増加側へ変
動した時にコンデンサに充電された電荷は、入力電圧が
減少側に変動した時にも放電されることがなく、制御用
トランジスタのベース電圧の変動が減少するので、出力
端子間の電圧の変動が減少する。Function The present invention uses a diode as a component of the filter circuit as described in J2, so that the electric charge charged in the capacitor when the input voltage fluctuates to the increasing side is reduced when the input voltage fluctuates to the decreasing side. Since the control transistor is not discharged, fluctuations in the base voltage of the control transistor are reduced, and therefore fluctuations in the voltage between the output terminals are reduced.
実施例
以下本発明の一実施例について第１図、第２図を参照し
ながら説明する。EXAMPLE An example of the present invention will be described below with reference to FIGS. 1 and 2.
第１図において第３図と同一の構成には同一の番号を付
し、説明を略す。In FIG. 1, the same components as in FIG. 3 are given the same numbers, and their explanations are omitted.
従来例との差異は、フィルター回路９がコンデンサ９４
とダイオード９６とで構成されていることである。The difference from the conventional example is that the filter circuit 9 has a capacitor 94.
and a diode 96.
以上のように構成された本発明の一実施例の定電圧電源
装置についてその動作を説明する。The operation of the constant voltage power supply device according to one embodiment of the present invention configured as described above will be explained.
整流装置２からの入力は、基準電圧発生回路８ヶ通−で
、フィルター回路９に入る。このフィルター回路９で、
残留リップル変動の増加側の変動の時は、ダイオード９
５はＯＮし、コンデンサ９４に充電されるが、減少側の
変動の時は、ダイオード９５はＯＦＦ となるので、
コンデンサ９４の電荷の放電ケ阻市する。The input from the rectifier 2 enters the filter circuit 9 through eight reference voltage generating circuits. With this filter circuit 9,
When the residual ripple fluctuation changes on the increasing side, diode 9
5 is turned on and the capacitor 94 is charged, but when the fluctuation is on the decreasing side, the diode 95 is turned off, so
This prevents the charge in the capacitor 94 from discharging.
以上のように上記実施例の定電圧電源装置によれば、フ
ィルター回路９ケコンデンサ９４とダイオード９６で構
成することにより、コンデンサ９４の容量を増すことな
く、出力電圧の変動を減少させることができる。As described above, according to the constant voltage power supply device of the above embodiment, by configuring the filter circuit with nine capacitors 94 and diodes 96, fluctuations in the output voltage can be reduced without increasing the capacitance of the capacitors 94. .
発明の効果
以−１−のように本発明の定電圧電源装置は、フィルタ
ー回路をコンデンサとダイオードとで構成することによ
り、リップル変動の大きい入力電圧に対しても出力電圧
変動の少々い定電圧電源装置を実現できる。Effects of the Invention As described in -1-, the constant voltage power supply device of the present invention has a filter circuit composed of a capacitor and a diode, so that it can generate a constant voltage with small output voltage fluctuations even for input voltages with large ripple fluctuations. A power supply device can be realized.
第１図は本発明の一実施例の定電圧電源装置の回路図、
第２図は本発明および従来例の両方の定電圧電源装置の
ブロック図、第３図は従来の定電圧電源装置の回路図で
ある。
９・・・・フィルター回路、１２．・・・・・制御用ト
ランジスタ、８４・・・・・定電圧ダイオード、９４・
・・・・・コンデンサ、９６・・・ダイオード。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名第１
図
第２図
兵］＝―≧
第３図
ＩＩFIG. 1 is a circuit diagram of a constant voltage power supply device according to an embodiment of the present invention,
FIG. 2 is a block diagram of a constant voltage power supply device of both the present invention and a conventional example, and FIG. 3 is a circuit diagram of a conventional constant voltage power supply device. 9...filter circuit, 12. ... Control transistor, 84 ... Constant voltage diode, 94.
...Capacitor, 96...Diode. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Soldier]=-≧ Figure 3 II
Claims (1)
制御端とし、エミッタを出力端とした制御用トランジス
タと、アノードが接地されカソードが抵抗を介して前記
制御用トランジスタのコレクタに接続された定電圧ダイ
オードと、アノードが前記定電圧ダイオードのカソード
に、カソードが前記制御用トランジスタのベースにそれ
ぞれ接続されたダイオードと、一端が前記制御用トラン
ジスタのベースに接続され、他端は接地されたコンデン
サよりなる定電圧電源装置。A control transistor whose collector is an input terminal to which a rectified output is applied, whose base is a control terminal, and whose emitter is an output terminal; and a constant whose anode is grounded and whose cathode is connected to the collector of the control transistor via a resistor. a voltage diode, a diode whose anode is connected to the cathode of the voltage regulator diode and whose cathode is connected to the base of the control transistor, and a capacitor whose one end is connected to the base of the control transistor and whose other end is grounded. A constant voltage power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP637185A JPS61165113A (en) | 1985-01-17 | 1985-01-17 | Constant-voltage power source unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP637185A JPS61165113A (en) | 1985-01-17 | 1985-01-17 | Constant-voltage power source unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61165113A true JPS61165113A (en) | 1986-07-25 |
Family
ID=11636507
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP637185A Pending JPS61165113A (en) | 1985-01-17 | 1985-01-17 | Constant-voltage power source unit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61165113A (en) |
-
1985
- 1985-01-17 JP JP637185A patent/JPS61165113A/en active Pending
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