JPS6222350B2 - - Google Patents
Info
- Publication number
- JPS6222350B2 JPS6222350B2 JP8543981A JP8543981A JPS6222350B2 JP S6222350 B2 JPS6222350 B2 JP S6222350B2 JP 8543981 A JP8543981 A JP 8543981A JP 8543981 A JP8543981 A JP 8543981A JP S6222350 B2 JPS6222350 B2 JP S6222350B2
- Authority
- JP
- Japan
- Prior art keywords
- transistor
- base
- output
- potential
- negative potential
- 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.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
- H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
- H02M3/28—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC
- H02M3/325—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Description
【発明の詳細な説明】
本発明は、電子機器用電源等に用いられる簡単
な回路構成で出力電圧の安定化を計ることのでき
るDC−DCコンバータに関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a DC-DC converter that is used in power supplies for electronic devices and can stabilize output voltage with a simple circuit configuration.
従来のDC−DCコンバータの一例を第１図に示
す。第１図において、発振回路、パルス幅制御回
路用にブロツキング発振回路による小型のDC−
DCコンバータをパルス幅制御回路用の半導体や
集積回路が高耐電圧用でない為に補助電源を必要
とし、回路が複雑となり、部品点数も多く小型し
にくく高価になりやすいという欠点があつた。 An example of a conventional DC-DC converter is shown in FIG. In Figure 1, a small DC-
The DC converter requires an auxiliary power supply because the semiconductors and integrated circuits for the pulse width control circuit are not designed for high voltage withstand voltage, and the disadvantage is that the circuit is complex, has a large number of parts, is difficult to downsize, and tends to be expensive.
本発明はこれらの欠点を除去するため簡単な回
路構成で出力電圧の安定価を計り小型化・安価な
DC−DCコンバータを提供することを目的とす
る。 In order to eliminate these drawbacks, the present invention measures the stability of the output voltage with a simple circuit configuration, and provides a compact and inexpensive device.
The purpose is to provide a DC-DC converter.
本発明は、ブロツキングオシレータにより正の
三角波の電位を作り、インピーダンス素子を介し
てトランジスタＱ２を動作させ、該トランジスタ
Ｑ２と直列に接続された巻線と他の出力巻線を有
するインバータ出力電圧をフイードバツクしトラ
ンジスタＱ２のベースと負の電位に接続されたイ
ンピーダンスを変化させ一定出力電圧を得ること
を特徴とする。 The present invention generates a positive triangular wave potential by a blocking oscillator, operates a transistor Q2 through an impedance element, and generates an inverter output voltage having a winding connected in series with the transistor Q2 and another output winding. It is characterized in that it feeds back and changes the impedance connected to the base of transistor Q2 and the negative potential to obtain a constant output voltage.
以下に本発明の一実施例を図面とともに詳述す
る。 An embodiment of the present invention will be described in detail below with reference to the drawings.
第２図は、本発明の一実施例を示す回路図であ
る。 FIG. 2 is a circuit diagram showing one embodiment of the present invention.
第２図においてトランスＴ１にトランジスタＱ
１のコレクタ電流とベース電流が正帰環をし自己
発振を起す様に巻線をして、ベース巻線又は別巻
線よりの出力をダイオードＤ２で整流し負電位を
作り、ツエナーダイオードＤ１により基準電位を
越るベース電流をこの負電位に流してトランジス
タＱ１をカツトオフし出力を安定化するブラツキ
ングオシレーターの２次側出力のパルス出力を抵
抗Ｒ３とコンデンサＣ４の積分回路によつて正の
三角波の電位を作り、トランジスタＱ２のベース
に抵抗Ｒ４を介して電流が流れ、トランジスタＱ
２を動作させコントロールトランジスタＱ３がエ
ミツタを負電位に接続し、ベースは比較回路３を
通しDC出力電圧の正側と接続されており、
DC出力電圧が一定値より高くなると比較回路
３がそれを検出し、トランジスタＱ３により、ト
ランジスタＱ２のON時間を狭め、一定値より低
くなるとON時間を広げる様な動作をして一定電
圧の出力電圧を得ることが出来る。 In Figure 2, transformer T1 is connected to transistor Q.
The collector current and base current of 1 are wound in a positive loop to cause self-oscillation, and the output from the base winding or another winding is rectified by diode D2 to create a negative potential, and the Zener diode D1 is used as a reference voltage. The pulse output of the secondary side output of the braking oscillator, which flows a base current exceeding the potential to this negative potential, cuts off the transistor Q1, and stabilizes the output, is converted into a positive triangular wave by the integrating circuit of the resistor R3 and the capacitor C4. , a current flows to the base of transistor Q2 via resistor R4, and transistor Q
The control transistor Q3 connects the emitter to the negative potential, and the base is connected to the positive side of the DC output voltage through the comparison circuit 3. When the DC output voltage becomes higher than a certain value, the comparison circuit 3 Detecting this, the transistor Q3 narrows the ON time of the transistor Q2, and when the voltage falls below a certain value, the ON time increases, thereby obtaining a constant output voltage.
以上のことにより複雑なパルス幅制御が不用
に、またその為の補助電源も必要とせず、回路が
簡略化され、部品点数も少なく小型化・安価な安
定なDC出力電圧を有するDC−DCコンバータが
可能となつた。 As a result of the above, a DC-DC converter with a stable DC output voltage that eliminates the need for complex pulse width control or auxiliary power supply, has a simplified circuit, has a small number of components, is compact, and is inexpensive. became possible.
また本発明のほか一実施例として、第３図に示
す、DC−DCコンバータは前記正の三角波の電位
の他にダイオードＤ３およびコンデンサＣ５によ
り正の直流電圧を作り、トランジスタＱ４，Ｑ
５，Ｑ２を順次動作させ、増幅することによりよ
り大きいパルス電流とスイツチングが出来ること
により大電流の安定したDC直流電圧を得られる
DC−DCコンバータを可能とした。 In addition to the present invention, as an embodiment of the present invention, the DC-DC converter shown in FIG.
5. By sequentially operating and amplifying Q2, a larger pulse current and switching can be achieved, allowing a stable DC voltage with a large current to be obtained.
It made DC-DC converter possible.
以上本発明について詳細に説明したが、本発明
により簡単な回路構成で安定なDC出力電圧を有
し小型化の安価なDC−DCコンバータが可能とな
つた。 The present invention has been described in detail above, and the present invention has made it possible to provide a compact and inexpensive DC-DC converter that has a stable DC output voltage with a simple circuit configuration.
第１図は従来の定電圧DC−DCコンバータの例
を示す回路図、第２図、第３図は本発明の一実施
例を示す回路図である。
図において、Ｑ１，Ｑ２，Ｑ３，Ｑ４，Ｑ５…
…ダイオード、Ｔ１，Ｔ２……トランス、Ｄ１…
…ツエナーダイオード、Ｄ２，Ｄ３，Ｄ４……ダ
イオード、Ｃ１，Ｃ２，Ｃ３，Ｃ４，Ｃ５……コ
ンデンサ、Ｒ１，Ｒ２，Ｒ３，Ｒ４，Ｒ５，Ｒ
６，Ｒ７……抵抗、１……発振回路、２……パル
ス幅制御回路、３……比較回路。
FIG. 1 is a circuit diagram showing an example of a conventional constant voltage DC-DC converter, and FIGS. 2 and 3 are circuit diagrams showing an embodiment of the present invention. In the figure, Q1, Q2, Q3, Q4, Q5...
...Diode, T1, T2...Transformer, D1...
...Zener diode, D2, D3, D4...Diode, C1, C2, C3, C4, C5...Capacitor, R1, R2, R3, R4, R5, R
6, R7...Resistor, 1...Oscillation circuit, 2...Pulse width control circuit, 3...Comparison circuit.
Claims (1)
クタ電流とベース電流が正帰環をさせ自己発振を
起す様に巻線を施こして、ベース巻線又は別巻線
よりの出力をダイオードで整流して負電位を作
り、基準電位を越るベース電流をこの負電位に流
してカツトオフし出力を安定化するブロツキング
オシレーターのパルス出力を積分して三角波の正
電位を他のトランジスタＱ２のベースに加えこの
ベースと前記の負電位に抵抗やコンデンサー、半
導体等のインピーダンス素子を介して結線をして
該トランジスタＱ２を動作させ、このトランジス
タと直列に接続した巻線と、他に出力巻線を有す
るインバーターを動作させその出力電圧をフイー
ドバツクして前記のトランジスタＱ２のベースと
前記の負電位につながれたインピーダンス値を変
化させ一定電圧を得ることを特徴としたDC−DC
コンバータ。 ２ 上記の正の積分した三角波にさらにフオワー
ド或はフライバツクより整流した正の電位を加え
てコントロールされたパルスを増幅してなる特許
請求の範囲第１項記載のDC−DCコンバータ。[Claims] 1. A winding is applied to one transformer so that the collector current and base current of the transistor Q1 make a positive return and self-oscillation occurs, and the output from the base winding or another winding is connected to a diode. The pulse output of the blocking oscillator is rectified to create a negative potential, and the base current that exceeds the reference potential is passed through this negative potential to be cut off and the output stabilized.The pulse output of the blocking oscillator is integrated, and the positive potential of the triangular wave is transferred to the other transistor Q2. In addition to the base of the transistor Q2, a wire is connected to this base and the negative potential mentioned above through an impedance element such as a resistor, a capacitor, or a semiconductor to operate the transistor Q2. A DC-DC characterized in that a constant voltage is obtained by operating an inverter having a wire and feeding back its output voltage to change an impedance value connected to the base of the transistor Q2 and the negative potential.
converter. 2. The DC-DC converter according to claim 1, wherein a positive potential rectified from forward or flyback is further added to the positive integrated triangular wave to amplify the controlled pulse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8543981A JPS57199470A (en) | 1981-06-03 | 1981-06-03 | Constant-voltage output dc-dc-converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8543981A JPS57199470A (en) | 1981-06-03 | 1981-06-03 | Constant-voltage output dc-dc-converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57199470A JPS57199470A (en) | 1982-12-07 |
| JPS6222350B2 true JPS6222350B2 (en) | 1987-05-18 |
Family
ID=13858886
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8543981A Granted JPS57199470A (en) | 1981-06-03 | 1981-06-03 | Constant-voltage output dc-dc-converter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57199470A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6038083U (en) * | 1983-08-24 | 1985-03-16 | 富士電気化学株式会社 | self-excited converter |
-
1981
- 1981-06-03 JP JP8543981A patent/JPS57199470A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57199470A (en) | 1982-12-07 |
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