JPS6222349B2 - - Google Patents
Info
- Publication number
- JPS6222349B2 JPS6222349B2 JP8543881A JP8543881A JPS6222349B2 JP S6222349 B2 JPS6222349 B2 JP S6222349B2 JP 8543881 A JP8543881 A JP 8543881A JP 8543881 A JP8543881 A JP 8543881A JP S6222349 B2 JPS6222349 B2 JP S6222349B2
- Authority
- JP
- Japan
- Prior art keywords
- transistor
- positive
- potential
- base
- output
- 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
- 239000003990 capacitor Substances 0.000 claims description 6
- 238000004804 winding Methods 0.000 claims description 5
- 230000000903 blocking effect Effects 0.000 claims description 3
- 239000004065 semiconductor Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
- 230000010355 oscillation Effects 0.000 description 3
- 238000003079 width control Methods 0.000 description 3
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.
第１図は従来のDC−DCコンバータの一例を示
す。このDC−DCコンバータは発振回路、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補助電源を必
要とし、回路が複雑となり、部品点数を多く小型
化しにくく高価になりやすいという欠点があつ
た。 FIG. 1 shows an example of a conventional DC-DC converter. This DC-DC converter is a small DC-DC converter with a blocking oscillation circuit for the oscillation circuit and pulse width control circuit. It is complicated, has many parts, is difficult to miniaturize, 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、出力電圧の安定化を計り、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。 SUMMARY OF THE INVENTION In order to eliminate these drawbacks, it is an object of the present invention to provide a compact and inexpensive DC-DC converter that stabilizes the output voltage with a simple circuit configuration.
本発明は、ブロツキングオシレータにより正の
三角波の電位および負の電位の二種の電位を作り
インピーダンス素子を介してトランジスターQ2
を動作させ該トランジスター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を構
成し、その出力電圧をフイードバツクし、トラン
ジスター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 uses a blocking oscillator to generate two types of potential, a positive triangular wave potential and a negative potential, and connects the transistor Q 2 through an impedance element.
operates an inverter having a winding connected in series with the transistor Q 2 and another output winding, feeds back its output voltage, and creates an impedance connected to the base of the transistor Q 2 and a negative potential. It is characterized by changing the output voltage to obtain a constant output voltage.
以下に本発明の一実施例を図面について説明す
る。 An embodiment of the present invention will be described 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
Q1のコレクタ電流とベース電流が正帰環をして
自己発振を起こす様に巻線し、２次側出力のパル
ス出力を抵抗Ｒ４とコンデンサＣ３の積分回路に
よつて正の三角波の電位をつくり、またパルス出
力のフライバツクよりダイオードＤ３とコンデン
サＣ４により負の電位の２種の電位をつくりトラ
ンジスタQ2のベースに抵抗Ｒ５を介し前記正負
の電流が流れ、トランジスタQ2を動作させコン
トロールトランジスタQ3の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に比例したベース電流を流してインピー
ダンスを低くしてトランジスタQ2のベース電位
を負電位に近づけてON時間を狭め又、一定値よ
り低くなるとON時間を広げるような動作をして
一定電圧の出力電圧を得ることが出来る。従つて
複雑なパルス幅制御が不用たまそのための補助電
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、安価な安定した出力電圧を有する
DC−DCコンバータが得られる。 In Figure 2, the transistor T1 is
The collector current and base current of Q1 are wound in a positive loop to cause self-oscillation, and the pulse output from the secondary side is converted into a positive triangular wave potential by an integrating circuit of resistor R4 and capacitor C3. Also, from the flyback of the pulse output, two types of negative potentials are created by the diode D3 and the capacitor C4, and the positive and negative currents flow through the base of the transistor Q2 through the resistor R5, operating the transistor Q2 and controlling the control transistor Q. The emitter of 3 is connected 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 detects it and the voltage is proportional to the transistor Q 3 . The base current flows to lower the impedance, bringing the base potential of transistor Q 2 closer to a negative potential, narrowing the ON time, and when the voltage drops below a certain value, increasing the ON time, thereby increasing the output voltage of a constant voltage. You can get it. Therefore, there is no need for complex pulse width control, no auxiliary power supply is required, the circuit is simplified, the number of parts is small, the device is compact, and it has a stable output voltage at low cost.
A DC-DC converter is obtained.
また本発明の実施例の第３図においては、前記
正の三角波の電位の他にパルストランスＴ３を介
して増幅し大電流のスイツチングが可能となり、
さらに第４図においてダイオードＤ１、コンデン
サＣ５により、正の直流電圧を作り増幅し、それ
によりQ4，Q5，Q2のトランジスタを順次動作さ
せ、より大きいパルス電流とスイツチング出来る
ことにより大電流の出力電圧の安定した小型の
DC−DCコンバータを提供することができる。 Further, in FIG. 3 of the embodiment of the present invention, in addition to the potential of the positive triangular wave, it is amplified via the pulse transformer T3, and it is possible to switch a large current.
Furthermore, in Fig. 4, a positive DC voltage is generated and amplified by the diode D1 and the capacitor C5, which sequentially operates the transistors Q 4 , Q 5 , and Q 2 , which allows for larger pulse current and switching, thereby increasing the current. Small size with stable output voltage
A DC-DC converter can be provided.
以上本発明について説明したが、本発明により
出力電圧の安定した小型化の出来る安価なDC−
DCコンバータを得ることが出来る。 The present invention has been explained above, and the present invention provides an inexpensive DC-
You can get a DC converter.
第１図は従来の定電圧DC−DCコンバータ例を
示す図、第２図は本発明の一実施例の回路図、第
３図、第４図も本発明の一実施例の回路図であ
る。
図において、１……発振回路、２……パルス幅
制御回路、３……比較回路、Q1，Q2，Q3，Q4，
Q5……トランジスタ、Ｄ１，Ｄ２，Ｄ３……ダ
イオード、Ｔ１，Ｔ２，Ｔ３……トランス、Ｃ
１，Ｃ２，Ｃ３，Ｃ４，Ｃ５……コンデンサ、Ｒ
１，Ｒ２，Ｒ３，Ｒ４，Ｒ５，Ｒ６，Ｒ７，Ｒ
８，Ｒ９……抵抗。
Fig. 1 is a diagram showing an example of a conventional constant voltage DC-DC converter, Fig. 2 is a circuit diagram of an embodiment of the present invention, and Figs. 3 and 4 are also circuit diagrams of an embodiment of the present invention. . In the figure, 1...oscillation circuit, 2...pulse width control circuit, 3...comparison circuit, Q1 , Q2 , Q3 , Q4 ,
Q 5 ...Transistor, D1, D2, D3...Diode, T1, T2, T3...Transformer, C
1, C2, C3, C4, C5...Capacitor, R
1, R2, R3, R4, R5, R6, R7, R
8, R9...Resistance.
Claims (1)
クタ電流とベース電流が正帰環をして自己発振を
起す様に巻線をし、パルス出力をするブロツキン
グオシレータの〔パルス出力のフオアード出力を
抵抗、コンデンサー等で積分した正の三角波の電
位〕および〔パルス出力のフライバツク電圧を整
流した負の電位〕の二種の電位をつくり、他のト
ランジスターQ2のベース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前記
２種の正負の電位と電流が流れる様にして、該ト
ランジスターQ2を動作させ、このトランジスタ
ーQ2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構成し、該出力電圧をフイー
ドバツクして前記トランジスターQ2のベースと
負電位に接続されたインピーダンスを変化させ一
定電圧を得ることを特徴とした定電圧DC−DCコ
ンバーター。 ２ 上記の正の積分波の他に、フオアード又はフ
ライバツクより整流した正の電位によりコントロ
ールされたパルスを増幅したりあるいはベースド
ライブ用のパルストランスを動作させることを特
徴とする前記第１項のDC−DCコンバーター。[Claims] 1. A blocking oscillator that outputs pulses by winding one transformer in such a way that the collector current and base current of transistor Q 1 make a positive return cycle and cause self-oscillation. Create two potentials: a positive triangular wave potential obtained by integrating the forward output with a resistor, capacitor, etc.] and a negative potential obtained by rectifying the flyback voltage of the pulse output, and connect a resistor or other potential to the base of the other transistor Q2 . The two types of positive and negative potentials and currents flow through impedance elements such as capacitors and semiconductors to operate the transistor Q 2 and connect the winding connected in series with the transistor Q 2 and the output winding. 1. A constant voltage DC-DC converter comprising an inverter having an inverter and feeding back the output voltage to change an impedance connected to the base of the transistor Q2 and a negative potential to obtain a constant voltage. 2. In addition to the positive integral wave described above, the DC of item 1 above is characterized in that it amplifies a pulse controlled by a positive potential rectified from a forward or flyback or operates a pulse transformer for base drive. -DC converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8543881A JPS57199469A (en) | 1981-06-03 | 1981-06-03 | Constant-voltage output dc-dc-converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8543881A JPS57199469A (en) | 1981-06-03 | 1981-06-03 | Constant-voltage output dc-dc-converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57199469A JPS57199469A (en) | 1982-12-07 |
| JPS6222349B2 true JPS6222349B2 (en) | 1987-05-18 |
Family
ID=13858857
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8543881A Granted JPS57199469A (en) | 1981-06-03 | 1981-06-03 | Constant-voltage output dc-dc-converter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57199469A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63133662U (en) * | 1987-02-24 | 1988-09-01 | ||
| US9240753B2 (en) | 2013-12-24 | 2016-01-19 | Fujitsu Limited | Oscillator and power management apparatus |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63274370A (en) * | 1987-04-30 | 1988-11-11 | Tokin Corp | Dc-dc converter |
-
1981
- 1981-06-03 JP JP8543881A patent/JPS57199469A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63133662U (en) * | 1987-02-24 | 1988-09-01 | ||
| US9240753B2 (en) | 2013-12-24 | 2016-01-19 | Fujitsu Limited | Oscillator and power management apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57199469A (en) | 1982-12-07 |
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