JPS6289474A - Dc-dc converter - Google Patents
Dc-dc converterInfo
- Publication number
- JPS6289474A JPS6289474A JP22639385A JP22639385A JPS6289474A JP S6289474 A JPS6289474 A JP S6289474A JP 22639385 A JP22639385 A JP 22639385A JP 22639385 A JP22639385 A JP 22639385A JP S6289474 A JPS6289474 A JP S6289474A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- output
- circuit
- circuits
- switching elements
- 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
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- Dc-Dc Converters (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、ＤＣ−ＤＣコンバータに関し、特に単・−人
力電源を、入力電圧より高い絶対値の正負出力を発生さ
せるＤＣ−ＤＣコンバータに関するものである。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a DC-DC converter, and particularly to a DC-DC converter that generates positive and negative outputs with an absolute value higher than the input voltage from a single human power source. It is.
従来この種の小容計の電源は、第２図のように。 The conventional power supply for this type of small meter is as shown in Figure 2.
入力直流電源端子１’、２’と、チョークコイル３′。Input DC power supply terminals 1', 2' and choke coil 3'.
１７′と、スイッチング素子４’、１６’と、整流平滑
回路５′８１８′と、安定化回路６’ ＋ １．９’と
、出力端子７’ 、 ８’ 、 ２０’と、鋸歯状波発
振回路９′と、基準電圧端子１１′と、比較駆動回路１
０’、１２’とによって構成されている。先ず第３図（
１）に示されるような、鋸歯状波発振回路９により出力
された波形Ｓと基準電圧Ｅとが、比較、駆動回路１０’
、１２’に入力され、スイッチング素子４′と１４′を
駆動する第３図（ＩＩ）に示す」；うな駆動パルスａ’
、 ｂ’が前記比較駆動回路から出力される。この１
駆動・ぐルスａ′とｂ′のオンデー−−ティｔ。ｎは一
定で２周期Ｔも固定である。スイッチング素子／ｌ’、
１４’のスイッチングのオンオフにより、チョークコイ
ル３’ 、 １５’に蓄積されたエネルギーが整流平滑
回路５’ ｒ Ｉｆ’ｉ’に印加され、出力電圧を７’
、 ８’ 、 ２０’に発する。この場合スイッチン
グのオンデユーテイが一定である為、入力電圧と同極性
側の整流平滑回路の出力電圧の絶対値が、入力電圧と反
対極性側よりも太きくなる。17', switching elements 4', 16', rectifying and smoothing circuit 5', 818', stabilizing circuit 6' + 1.9', output terminals 7', 8', 20', sawtooth wave oscillation circuit 9', reference voltage terminal 11', and comparison drive circuit 1
0' and 12'. First, Figure 3 (
1), the waveform S output by the sawtooth wave oscillation circuit 9 and the reference voltage E are compared and driven by the drive circuit 10'.
, 12' and drives the switching elements 4' and 14' as shown in FIG. 3 (II).
, b' are output from the comparison drive circuit. This one
Onday of the driving force a' and b'. n is constant, and 2 periods T are also fixed. switching element/l',
By switching on and off 14', the energy stored in the choke coils 3' and 15' is applied to the rectifying and smoothing circuit 5'r If'i', and the output voltage is changed to 7'.
, 8', 20'. In this case, since the switching on-duty is constant, the absolute value of the output voltage of the rectifying and smoothing circuit on the side of the same polarity as the input voltage is thicker than that on the side of the polarity opposite to the input voltage.
次に整流平滑回路５’ 、 １８’の出力は安定化回路
６’ ＋ １９’へ入力され、安定化されて出力端子７
′。Next, the outputs of the rectifying and smoothing circuits 5' and 18' are input to the stabilizing circuit 6' + 19', where they are stabilized and sent to the output terminal 7.
'.
８／ 、 ２０／へ供給される。通當安定化回路の人力
最低電圧以にの電圧を整流゛Ｐ滑回路が出力できるよう
にスイッチングのオンデー−ティｔ を選ぶが。8/, 20/. The switching on-date t is selected so that the rectifier P-slip circuit can output a voltage higher than the lowest human-powered voltage of the general stabilization circuit.
同じ絶対値の電圧を出す為にｔｉｔ入力電圧と反対極性
の出力側の方がデー−ティが大きくなる。従って入力電
圧と同極性側の整流平滑回路の出力重重−が過剰に大き
くなる。In order to output voltages with the same absolute value, the output side with the opposite polarity to the tit input voltage has a larger data. Therefore, the output weight of the rectifying and smoothing circuit on the same polarity side as the input voltage becomes excessively large.
〔発明が解決１−、ようとする問題点〕１−．述した従
来のＩ）Ｃ−ＤＣコンバータ回路は、正負の電圧を安定
化回路に与えて正負の電圧を出力１７ようとするもので
あるが、安定化回路に与える最小電圧を保障する為に選
ぶスイッチングのオンデ、−ティは、入力電圧と反対極
性側が大きい為。[Problems that the invention attempts to solve 1-.] 1-. The conventional I) C-DC converter circuit described above attempts to output positive and negative voltages by applying positive and negative voltages to the stabilization circuit, but this is selected in order to guarantee the minimum voltage to be applied to the stabilization circuit. Switching on and - tee is because the polarity side opposite to the input voltage is large.
入力電圧と同極性１１１１１の整流平滑回路の出力電圧
は不必要に大きくなる。その為、入力電圧と同極性側の
安定化回路の電力損失が大きくなると共に。The output voltage of the rectifying and smoothing circuit 11111 having the same polarity as the input voltage becomes unnecessarily large. Therefore, the power loss of the stabilizing circuit on the same polarity side as the input voltage increases.
整流平滑回路における整流器の定格が大きくなり。The rating of the rectifier in the rectifying and smoothing circuit increases.
又、スイッチング電流が不必要に大きくなる為。Also, the switching current becomes unnecessarily large.
スインチング素子又、チョークコイルの定格が大きくな
り、又入力電流が増加するという欠点があった０
〔問題を解決するだめの手段〕
本発明によれば、おのおのがチョークコイル。[Means for Solving the Problem] According to the present invention, each of the switching elements and the choke coil has a drawback that the rating becomes large and the input current increases.
、駆動パルスにより動作するスイッチング素子、整流平
滑回路、安定化回路、及び鋸歯状波電圧と他の電圧の比
較による前記駆動パルスを得るための比較駆動回路を備
えた下側及び負側の系が、単一の直流電圧を共通に受け
、該直流電圧より高い絶対値の正側及び負側の出力電圧
をそれぞれ出力するＤＣ−ＤＣコンバータにおいて、前
記入力電圧と同極性の出力側の前記側の電圧をりえる手
段が。, a lower and negative side system comprising a switching element operated by a driving pulse, a rectifying and smoothing circuit, a stabilizing circuit, and a comparison driving circuit for obtaining the driving pulse by comparing the sawtooth wave voltage with another voltage. , in a DC-DC converter that commonly receives a single DC voltage and outputs output voltages on the positive side and negative side, respectively, with an absolute value higher than the DC voltage, the output side has the same polarity as the input voltage. There is a way to change the voltage.
前記２つの系の整流平滑回路の出力電圧の間に直列に接
続された同抵抗飴の２つの抵抗と２これら２つの抵抗の
間の接続点の電圧と前記２つの出力電圧の接地側電圧の
差電圧を増幅する誤差増幅器び負側の出力電圧の絶対値
を相等しくするようにしたことを特徴とするＤＣ−ＤＣ
コンバータが得られる。The two resistors of the same resistance candy are connected in series between the output voltages of the rectifying and smoothing circuits of the two systems, and the voltage at the connection point between these two resistors and the ground side voltage of the two output voltages. A DC-DC characterized in that the absolute values of the output voltages on the negative side of the error amplifier amplifying the differential voltage are made equal to each other.
Converter is obtained.
第１図は本発明の一実施例の構成を示す図である。１，
２は入力直流電源端子、３．１７はチョークコイル、４
．１６はスイッチング素−子、５゜１８は整流平滑回路
、６．１９は安定化回路、７゜８．２０は出力端子、９
は鋸歯状波発生回路。FIG. 1 is a diagram showing the configuration of an embodiment of the present invention. 1,
2 is the input DC power supply terminal, 3.17 is the choke coil, 4
．． 16 is a switching element, 5° 18 is a rectifying and smoothing circuit, 6.19 is a stabilizing circuit, 7° 8.20 is an output terminal, 9
is a sawtooth wave generation circuit.
１、 ：３ 、１４は抵抗値の等しい分割抵抗、１５は
誤差増幅器＋ ２１ ＋ ２２は比較、駆動回路の出力
電圧ｖ＋。1, :3, 14 are divided resistors with equal resistance values, 15 is an error amplifier + 21 + 22 is a comparison, and output voltage v+ of the drive circuit.
■−である。■-.
第４図はこの装置の動作を説明する為の各波形を示す図
である。今整流平滑回路５．１８の出力電圧■４の絶対
値がＶ−の絶対値より大きくなろうとした時２分割抵抗
１３．１４によす■１と■−との分割電圧がグランドよ
り正の電位の為、（■）に示す誤差増幅器１５の誤差増
幅出力Ｃのレベルが動き、鋸歯状波発生回路９の出力波
形Ｓのスライスレベルが動く為、比較駆動回路１０の出
力ノクルスａオンデユーテイの幅が小さくなり（■）、
整流平滑回路５の出力電圧Ｖ＋の値が小さくなる。従っ
て、入力電源と同極性側の整流平滑回路５の出力電圧Ｖ
＋の絶対値は、入力電源と逆極性側の整流平滑回路１８
の出力電圧Ｖ−の絶対値と等しくなる。FIG. 4 is a diagram showing each waveform for explaining the operation of this device. Now, when the absolute value of the output voltage ■4 of the rectifying and smoothing circuit 5.18 is about to become larger than the absolute value of V-, the divided voltage between ■1 and ■- applied to the two-part resistor 13.14 becomes more positive than the ground. Because of the potential, the level of the error amplified output C of the error amplifier 15 shown in (■) changes, and the slice level of the output waveform S of the sawtooth wave generation circuit 9 changes, so the width of the output Noculus a on duty of the comparison drive circuit 10 changes. becomes smaller (■),
The value of the output voltage V+ of the rectifying and smoothing circuit 5 becomes smaller. Therefore, the output voltage V of the rectifier and smoothing circuit 5 on the same polarity side as the input power supply
The absolute value of + is the rectifier and smoothing circuit 18 on the opposite polarity side to the input power supply.
is equal to the absolute value of the output voltage V-.
以−ヒ説明したように２本発明は単一人力電源をスイッ
チングし、ｌｌｉ性が異り、入力電圧より絶対値が大き
い電源を発生する時、入力′電源と同極性側のスイッチ
ング素子のオンゾ”−−ティ：ｔ、−１ｔｒｆ制御する
ことにより、入力箱；源と同極性側の整流平滑回路の出
力電圧の絶対値を、入力電源と逆極性側の整流平滑回路
の出力電圧の絶対値と等（２〈できる。As explained below, when the present invention switches a single human-powered power source and generates a power source with different lli properties and a larger absolute value than the input voltage, the on-switching of the switching element on the side of the same polarity as the input power source is realized. ``--T: t, -1 By controlling the trf, the absolute value of the output voltage of the rectifier and smoothing circuit on the same polarity side as the input box, and the absolute value of the output voltage of the rectifier and smoothing circuit on the opposite polarity side to the input power source. and so on (2〈can be done.
従って２通常、安定化回路の入力最低電圧を保障する為
、同じオンプ゛−−ティでスイッチングすると、入力電
圧と同極性側の整流平滑Ｎ路の出力電圧が不必要に大き
くなるのを防ぐことができ、このため安定化回路の損失
を小さくし７．整流平滑回路の整流器の電流定格、平滑
コンデンサの血ｊ圧定格を小さくシ、スイッチング素子
、チ、 ９コイルの電流定格、更に入力電流をも小さ
くすることができる為、原価的に安く１効率が上がる効
果がある。Therefore, 2. Normally, in order to guarantee the minimum input voltage of the stabilizing circuit, switching with the same output voltage prevents the output voltage of the rectifying and smoothing N path on the same polarity side as the input voltage from becoming unnecessarily large. 7. This reduces the loss of the stabilizing circuit. It is possible to reduce the current rating of the rectifier of the rectifying and smoothing circuit, the blood pressure rating of the smoothing capacitor, the current rating of the switching element, 9 coils, and even the input current, resulting in lower cost and higher efficiency. It has the effect of increasing
第１図は本発明の一実施例の構成を示す図、第２図は従
来回路の一例の構成を示す図、第３図は従来回路の短歯
状波、基準電圧、スイッチング・Ｑルスの各波形を示す
図、第４図は本発明実施の鋸歯状波、基準電圧、誤差増
幅器、及びスイッチングパルスの各波形を示す図である
。
記号の説明： １ 、１′、２．２’は入力直流電源端
子。
３．３′はチョークコイル、 ４ 、４’はスイッチン
グ素子、 ５ 、５’は整流平滑回路、 ６ 、６’は
安定化回路、７．７’、８．８’は出力端子、 ９ 、
９’は鋸歯状波発生回路、 １０ 、１０’は比較駆動
回路、１１゜１１′は基準電圧端子、 ］ ２ 、１２
’は比較駆動回路。
１３及び１４は同抵抗値の分割抵抗、１５は誤差増幅器
、２１及び２２は整流平滑回路出力電圧。
ａ 、 ａ’ 、 ｂ 、 Ｉ）’は駆動信号、Ｃは誤
差増幅信号をそれぞれあられしている。Fig. 1 is a diagram showing the configuration of an embodiment of the present invention, Fig. 2 is a diagram showing the configuration of an example of a conventional circuit, and Fig. 3 is a diagram showing the configuration of an example of a conventional circuit. FIG. 4 is a diagram showing waveforms of a sawtooth wave, a reference voltage, an error amplifier, and a switching pulse according to the present invention. Explanation of symbols: 1, 1', 2.2' are input DC power supply terminals. 3.3' is a choke coil, 4, 4' are switching elements, 5, 5' are rectifying and smoothing circuits, 6, 6' are stabilizing circuits, 7.7', 8.8' are output terminals, 9,
9' is a sawtooth wave generation circuit, 10 and 10' are comparison drive circuits, 11° and 11' are reference voltage terminals, ]2, 12
' is a comparison drive circuit. 13 and 14 are dividing resistors with the same resistance value, 15 is an error amplifier, and 21 and 22 are rectifier and smoothing circuit output voltages. a, a', b, I)' are drive signals, and C is an error amplification signal, respectively.
Claims (1)
するスイッチング素子、整流平滑回路、安定化回路、及
び鋸歯状波電圧と他の電圧の比較による前記駆動パルス
を得るための比較駆動回路を備えた正側及び負側の系が
、単一の直流電圧を共通に受け、該直流電圧より高い絶
対値の正側及び負側の出力電圧をそれぞれ出力するＤＣ
−ＤＣコンバータにおいて、前記入力電圧と同極性の出
力側の前記他の電圧を与える手段が、前記２つの系の整
流平滑回路の出力電圧の間に直列に接続された同抵抗値
の２つの抵抗と、これら２つの抵抗の間の接続点の電圧
と前記２つの出力電圧の接地側電圧の差電圧を増幅する
誤差増幅器から成り、前記入力電圧と逆極性の出力側の
前記他の電圧を所定の基準電圧とし、これにより前記正
側及び負側の出力電圧の絶対値を相等しくするようにし
たことを特徴とするＤＣ−ＤＣコンバータ。1. The positive side, each equipped with a choke coil, a switching element operated by a drive pulse, a rectifier and smoothing circuit, a stabilizing circuit, and a comparison drive circuit for obtaining the drive pulse by comparing the sawtooth voltage with another voltage. and a DC system in which the negative side systems receive a single DC voltage in common and output positive and negative side output voltages having higher absolute values than the DC voltage, respectively.
- In the DC converter, the means for providing the other voltage on the output side having the same polarity as the input voltage includes two resistors having the same resistance value connected in series between the output voltages of the rectifying and smoothing circuits of the two systems. and an error amplifier that amplifies the difference voltage between the voltage at the connection point between these two resistors and the ground side voltage of the two output voltages, and sets the other voltage on the output side of opposite polarity to the input voltage to a predetermined value. A DC-DC converter characterized in that the reference voltage is set as a reference voltage, thereby making the absolute values of the positive side and negative side output voltages equal to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22639385A JPS6289474A (en) | 1985-10-11 | 1985-10-11 | Dc-dc converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22639385A JPS6289474A (en) | 1985-10-11 | 1985-10-11 | Dc-dc converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6289474A true JPS6289474A (en) | 1987-04-23 |
Family
ID=16844415
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22639385A Pending JPS6289474A (en) | 1985-10-11 | 1985-10-11 | Dc-dc converter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6289474A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62239860A (en) * | 1986-04-11 | 1987-10-20 | Fuji Electric Co Ltd | Dc-dc converter |
| EP1324477A2 (en) * | 2001-12-21 | 2003-07-02 | Fujitsu Limited | Bipolar supply voltage generator and semiconductor device for same |
-
1985
- 1985-10-11 JP JP22639385A patent/JPS6289474A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62239860A (en) * | 1986-04-11 | 1987-10-20 | Fuji Electric Co Ltd | Dc-dc converter |
| JPH0440943B2 (en) * | 1986-04-11 | 1992-07-06 | Fuji Electric Co Ltd | |
| EP1324477A2 (en) * | 2001-12-21 | 2003-07-02 | Fujitsu Limited | Bipolar supply voltage generator and semiconductor device for same |
| EP1324477A3 (en) * | 2001-12-21 | 2004-10-20 | Fujitsu Limited | Bipolar supply voltage generator and semiconductor device for same |
| US7342436B2 (en) | 2001-12-21 | 2008-03-11 | Fujitsu Limited | Bipolar supply voltage generator and semiconductor device for same |
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