JPS6218970A - Power source device - Google Patents
Power source deviceInfo
- Publication number
- JPS6218970A JPS6218970A JP60157275A JP15727585A JPS6218970A JP S6218970 A JPS6218970 A JP S6218970A JP 60157275 A JP60157275 A JP 60157275A JP 15727585 A JP15727585 A JP 15727585A JP S6218970 A JPS6218970 A JP S6218970A
- Authority
- JP
- Japan
- Prior art keywords
- chopper
- transistor
- input voltage
- circuit
- power source
- 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
-
- 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
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1582—Buck-boost converters
Landscapes
- 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、テレビジョン受像機、VTR等の安定化電源
回路を必要とする機器に利用されるチョッパ方式の電源
装置に関するものであり、特にバッテリ電圧で駆動する
場合の様に入力電圧の変動範囲が大きい場合に有効な電
g装置に関する。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a chopper type power supply device used in equipment such as television receivers and VTRs that require a stabilized power supply circuit. The present invention relates to an electric g device that is effective when the fluctuation range of the input voltage is large, such as when driving with an electric current.
従来の技術
一般に、チョッパ方式安定化電源は、入力直流電圧に対
し出力電圧を降圧するものと昇圧するものに大別できる
が、これらは回路構成が異なるため、同一回路で両者を
満足することはできない。Conventional technology In general, chopper type stabilized power supplies can be roughly divided into those that step down the output voltage with respect to the input DC voltage and those that step up the output voltage, but since these have different circuit configurations, it is impossible to satisfy both with the same circuit. Can not.
第2図に従来の降圧型、第4図に従来の昇圧型のチョッ
パ方式安定化電源を示す。FIG. 2 shows a conventional step-down type stabilized power supply, and FIG. 4 shows a conventional step-up type chopper type stabilized power supply.
まず降圧型について説明すると、第2図において降圧用
チョッパトランジスターがONすると入力電圧VITI
はチョークコイル2を介して平滑コンデンサ3及び負荷
4へ供給される。この時チョークコイル2を流れる電流
I+、と入力電圧VIT+、出力電圧V。utの関係は
下式で示される。First, to explain the step-down type, in Fig. 2, when the step-down chopper transistor is turned on, the input voltage VITI
is supplied to a smoothing capacitor 3 and a load 4 via a choke coil 2. At this time, the current I+ flowing through the choke coil 2, the input voltage VIT+, and the output voltage V. The relationship between ut is shown by the following formula.
±が
Vln Vs 7ou、= L ”””■
t
但し vs;トランジスターのON時のV(:H(Sa
t)電圧L;チョークコイル2のインダクタンス値0式
より、ILは下式に示される様に増加する。± is Vln Vs 7ou, = L ”””■
t However, vs; V when the transistor is ON (:H(Sa
t) Voltage L: Inductance value of choke coil 2 From the equation 0, IL increases as shown in the equation below.
、=V −Vs−V・・t+に、−11,■但しに□
;積分定数(一定値)
次にトランジスタ1がOFFすれば、06時にチョーク
コイル2に蓄積された磁束のエネルギーが、フライホイ
ールダイオード5の導通によりチョークコイル2を介し
て、平滑コンデンサ3、負荷4へ供給される。この場合
も同様にして、It、は下式の様に算出される。,=V −Vs−V・・t+, −11, ■ However, □
; Integral constant (constant value) Next, when the transistor 1 is turned off, the energy of the magnetic flux accumulated in the choke coil 2 at 06:00 is transferred to the smoothing capacitor 3 and the load 4 via the choke coil 2 due to conduction of the flywheel diode 5. supplied to In this case as well, It is calculated as shown in the following formula.
但しvn;フライホイールダイオード5の06時の電圧
降下但しに2;積分定数
以上の算出されたILを各部波形と共に第3図に示す。However, vn: Voltage drop of flywheel diode 5 at 06:00: 2; Calculated IL greater than the integral constant is shown in FIG. 3 along with waveforms of various parts.
この図に示した様に、磁束の連続性により、II、波形
は06時、OFF時で連続となる。従って、図中に示し
た1しのリップル成分工しについて、■式より算出され
る値と0式より算出される値は等しくなる。■式よりI
t、を算出すると、但しtoTl;トランジスタ1のO
NN時間式式り■しを算出すると
但しtotr;トランジスタ1のOFF時間■、■より
ここでVs<VoutyVo(VOutとすれば、上式
は次式の様になる。As shown in this figure, due to the continuity of the magnetic flux, the waveform II becomes continuous at 06 o'clock and at the OFF time. Therefore, regarding the ripple component processing of 1 shown in the figure, the value calculated from equation (2) and the value calculated from equation 0 are equal. ■From the formula I
t, where toTl; O of transistor 1
Calculating the NN time formula (2). However, from totr; OFF time of transistor 1 (2), (2), here Vs<VoutyVo (If VOut is set, the above equation becomes the following equation.
■式かられかる様に、入力電圧Vlnが変動した場合に
、トランジスタlのオンデユーテイを制御すれば、出力
電圧voutを一定に保つことができる。As can be seen from equation (2), if the input voltage Vln fluctuates, the output voltage vout can be kept constant by controlling the on-duty of the transistor l.
一方、第4図に示した昇圧型についても同様に、出力電
圧VOutを入力電圧Vlnと”−0nr tOrtで
表わすことができる。On the other hand, similarly for the boost type shown in FIG. 4, the output voltage VOut can be expressed by the input voltage Vln and "-0nr tOrt."
なお、第4図において6は昇圧用チョッパトランジスタ
、7は整流ダイオードである。In addition, in FIG. 4, 6 is a boosting chopper transistor, and 7 is a rectifier diode.
発明が解決しようとする問題点
ところが、第2図、第4図で示した回路は、それぞれ■
式、■式かられかる様に、■式ではV。U(≦V I
Tl r■式ではVOuL≧vi、llとなるため、そ
れぞれ入力電圧に対して出力電圧を降圧、昇圧すること
しかできない。従って、例えば入力電圧の変動範囲が9
v〜16Vであるのに対し、常に12V安定化出力を得
たい場合は、従来の降圧型チョッパ方式、降圧型チョッ
パ方式のいずれかのみを用いただけではこれを実現する
ことができない。Problems to be Solved by the Invention However, the circuits shown in FIGS. 2 and 4 each have the following problems:
As you can see from the formula and the ■formula, V in the ■formula. U(≦VI
In the Tl r ■ formula, VOuL≧vi, ll, so the output voltage can only be stepped down or stepped up with respect to the input voltage, respectively. Therefore, for example, if the input voltage fluctuation range is 9
v~16V, but if it is desired to always obtain a 12V stabilized output, this cannot be achieved by using only the conventional step-down chopper method or step-down chopper method.
次にコストの点から述べると、フライバック方式に代表
されるコンバータトランスを用いたスイッチング電源は
、入力に対し任意の出力電圧を得ることができるため、
前述の例を実現する方法として従来用いられてきた。し
かしながら、チョッパ方式で用いるチョークコイルに対
し、コンバータトランスが大幅なコストアップの原因と
なっていた。Next, from the point of view of cost, switching power supplies using a converter transformer, such as the flyback method, can obtain any output voltage for the input, so
This has been conventionally used as a method for implementing the above example. However, compared to the choke coil used in the chopper method, the converter transformer has been the cause of a significant increase in cost.
本発明はこの様な問題点を解決するものであり、従来の
降圧型、昇圧型チョッパ方式電源を同一の回路で実現す
ることによって、他のコンバータトランスを用いたスイ
ッチング電源より安価にこれを実現するものである。The present invention solves these problems, and by realizing conventional step-down and step-up chopper power supplies in the same circuit, it is possible to achieve this at a lower cost than other switching power supplies using converter transformers. It is something to do.
問題点を解決するための手段
上記問題点を解決するため本発明は、同一のチョークコ
イルにそれぞれ接続される降圧用チョッパトランジスタ
および昇圧用チョッパトランジスタと、入力電圧と所要
出力電圧との大小を比較判別する入力電圧判別回路と、
この入力電圧判別回路からの出力に応じて前記降圧用お
よび昇圧用チョッパトランジスタを択一的に動作させる
切替回路と髪備えたものである。Means for Solving the Problems In order to solve the above problems, the present invention compares the input voltage and the required output voltage of a step-down chopper transistor and a step-up chopper transistor that are respectively connected to the same choke coil. an input voltage discrimination circuit that discriminates;
The device includes a switching circuit that selectively operates the step-down and step-up chopper transistors according to the output from the input voltage discrimination circuit.
作用
以上の様な手段を用い、入力電圧に応じて、V1n≧V
outの場合は発振デユーティ制御回路からの信号を降
圧用チョッパトランジスタに伝え、V+n≦V Ou
Lの場合は逆に昇圧用チョッパトランジスタに伝えるも
ので、自動的にVlnに応じて降圧型電源、昇圧型電源
として切替え動作するものである。Using the above-mentioned means, V1n≧V is determined depending on the input voltage.
In the case of out, the signal from the oscillation duty control circuit is transmitted to the step-down chopper transistor, and V+n≦V Ou
In the case of L, on the other hand, the signal is transmitted to the step-up chopper transistor, and the power source is automatically switched between a step-down type power source and a step-up type power source according to Vln.
実施例
本発明の実施例を図面を参照して説明する。第1図は一
つの実施例であるが1回路構成は、従来の降圧型チョッ
パ方式の構成要素、即ち降圧用チョッパl−ランジスタ
1、チョークコイル2、平滑コンデンサ3、フライホイ
ールダイオード5、及び誤差増幅回路9、パルス幅変調
回路10、駆動回路11に対して、新たに昇圧用チョッ
パトランジスタ6、整流ダイオード7、入力電圧判別回
路8、切替回路としての切替スイッチ12を加えたもの
となっている。Embodiment An embodiment of the present invention will be described with reference to the drawings. Although FIG. 1 shows one embodiment, one circuit configuration includes the components of a conventional step-down chopper system, namely, a step-down chopper L-transistor 1, a choke coil 2, a smoothing capacitor 3, a flywheel diode 5, and an error. In addition to the amplifier circuit 9, pulse width modulation circuit 10, and drive circuit 11, a boost chopper transistor 6, a rectifier diode 7, an input voltage discrimination circuit 8, and a changeover switch 12 as a changeover circuit are newly added. .
以下、本回路の動作について説明する。まず入力電圧V
lnが出力電圧VOut以上の時は、降圧型チョッパ電
源として動作する。即ち、この時入力電圧判別回路8に
よりVln≧VOuLが検出され、切替スイッチ12は
トランジスタ1の側へ切替えられる。従って、トランジ
スタ1のみが、出力電圧の誤差増幅に応じたデユーティ
制御信号で駆動される。またこの時、トランジスタ6ベ
ースは抵抗14で接地されるため、カットオフとなる。The operation of this circuit will be explained below. First, the input voltage V
When ln is higher than the output voltage VOut, it operates as a step-down chopper power supply. That is, at this time, the input voltage discrimination circuit 8 detects that Vln≧VOuL, and the selector switch 12 is switched to the transistor 1 side. Therefore, only transistor 1 is driven by a duty control signal corresponding to error amplification of the output voltage. Further, at this time, the base of the transistor 6 is grounded through the resistor 14, so that it is cut off.
以上の状態での回路動作は、第2図で説明した従来の降
圧型チョッパ電源と基本的に等しい。The circuit operation in the above state is basically the same as that of the conventional step-down chopper power supply described in FIG.
次に、入力電圧Vlnが出力電圧VOut以下の時は、
本回路は昇圧型チョッパ電源として動作する。Next, when the input voltage Vln is less than the output voltage VOut,
This circuit operates as a step-up chopper power supply.
即ち、入力電圧判別回路8によりvITl≦VOuLが
検出され、切替スイッチ12はトランジスタ6の側へ切
替えられる。従って、トランジスタ6のみがデユーティ
制御信号で駆動される。この時トランジスタ1のベース
は抵抗13でVlnに接続されているためオンとなって
おり、またそのためにダイオード5は逆バイアスとなり
カットオフとなっている。以上の状態は第4図で示した
従来の昇圧型チョッパ電源と基本的に等しい。この様に
して入力電圧v1nに応じて降圧型、昇圧型に自動的に
切替わり、出力電圧VOutを一定に保っごとができる
。That is, the input voltage discrimination circuit 8 detects vITl≦VouL, and the changeover switch 12 is switched to the transistor 6 side. Therefore, only transistor 6 is driven by the duty control signal. At this time, the base of transistor 1 is connected to Vln through resistor 13, so it is on, and therefore diode 5 is reverse biased and cut off. The above state is basically the same as that of the conventional step-up chopper power supply shown in FIG. In this way, it is possible to automatically switch between the step-down type and the step-up type depending on the input voltage v1n, and keep the output voltage VOut constant.
発明の効果
以−1−の様に本発明によると、降圧型、昇圧型チョッ
パ方式電源を一つの回路で実現することができる。また
回路構成は従来の降圧型チョッパ方式電源に昇圧用チョ
ッパトランジスタ、整流ダイオード、入力電圧判別回路
、および切替回路を追加するだけで実現が可能であり、
他のコンバータトランスを使用した方式のスイッチング
電源に比べ安いコストで実現することができる。Effects of the Invention As described in -1-, according to the present invention, a step-down type and a step-up chopper type power supply can be realized with one circuit. In addition, the circuit configuration can be realized by simply adding a step-up chopper transistor, a rectifier diode, an input voltage discrimination circuit, and a switching circuit to a conventional step-down chopper power supply.
It can be realized at a lower cost than other switching power supplies using converter transformers.
第1図は本発明の一実施例の回路図、第2図は従来の降
圧型チョッパ方式電源の回路図、第3図は従来の降圧型
チョッパ方式電源の各部動作波形の原理図、第4図は従
来の昇圧型チョッパ方式電源の回路図である。
1・・・降圧用チョッパトランジスタ、2・・・チョー
クコイル、6・・昇圧用チョッパトランジスタ、8・・
・入力電圧判別回路、12・・・切替スイッチ(切替回
路)、Vln・・・入力電圧、VOuL・・・出カ電圧
代理人 森 本 義 弘
第を図
f−戸1−[唱+〕・ンへ°トランシバスフ2−・−今
ヨ−7:I 4 +L−
4−!LJ”H+ヨーツバ外ランシ”スダβ−4−人力
も圧ナリ男11回裏各、
f2−一一νn窄トスイン4(切1ダトロ厨9)Vi八
−−−、メ、刀電氏
νou、i−・−上刃電瓜Fig. 1 is a circuit diagram of an embodiment of the present invention, Fig. 2 is a circuit diagram of a conventional step-down chopper type power supply, Fig. 3 is a principle diagram of operating waveforms of each part of a conventional step-down chopper type power supply, and Fig. 4 The figure is a circuit diagram of a conventional step-up chopper type power supply. 1...Chopper transistor for step-down, 2...Choke coil, 6...Chopper transistor for step-up, 8...
・Input voltage discrimination circuit, 12... Selector switch (switching circuit), Vln... Input voltage, VOuL... Output voltage agent Towards °transibus 2-・-now-7: I 4 +L- 4-! LJ "H + Yotsuba outside Ranshi" Suda β-4 - Manpower is also overwhelming man 11th inning bottom each, f2 - 11 νn narrowed toss in 4 (cut 1 Datoro 9) Vi 8 ---, Me, Mr. Toden νou, i-・-Kamibade Denka
Claims (1)
チョッパトランジスタおよび昇圧用チョッパトランジス
タと、入力電圧と所要出力電圧との大小を比較判別する
入力電圧判別回路と、この入力電圧判別回路からの出力
に応じて前記降圧用および昇圧用チョッパトランジスタ
を択一的に動作させる切替回路とを備えたことを特徴と
する電源装置。1. A step-down chopper transistor and a step-up chopper transistor each connected to the same choke coil, an input voltage discrimination circuit that compares and determines the magnitude of the input voltage and the required output voltage, and an output from this input voltage discrimination circuit. A power supply device comprising a switching circuit that selectively operates the step-down and step-up chopper transistors accordingly.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP60157275A JPS6218970A (en) | 1985-07-17 | 1985-07-17 | Power source device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP60157275A JPS6218970A (en) | 1985-07-17 | 1985-07-17 | Power source device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6218970A true JPS6218970A (en) | 1987-01-27 |
Family
ID=15646090
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP60157275A Pending JPS6218970A (en) | 1985-07-17 | 1985-07-17 | Power source device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6218970A (en) |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005045943A (en) * | 2003-07-23 | 2005-02-17 | Matsushita Electric Ind Co Ltd | Step-up/step-down dc-dc converter |
KR100539853B1 (en) * | 2002-02-21 | 2005-12-28 | 엔이씨 도낀 가부시끼가이샤 | Power circuit and method for controlling same |
JP2006074965A (en) * | 2004-09-06 | 2006-03-16 | Honda Motor Co Ltd | Power supply device |
JP2010098840A (en) * | 2008-10-16 | 2010-04-30 | Koito Mfg Co Ltd | Voltage step up/down dc-dc converter |
JP2010104161A (en) * | 2008-10-24 | 2010-05-06 | Koito Mfg Co Ltd | Dc-dc converter |
EP2337207A2 (en) | 2009-12-16 | 2011-06-22 | Koito Manufacturing Co., Ltd. | Step-up and step-down DC-DC converter |
JP2011172321A (en) * | 2010-02-16 | 2011-09-01 | Koito Mfg Co Ltd | Step-up/down dc-dc converter and vehicular lighting fixture |
JP2012018845A (en) * | 2010-07-08 | 2012-01-26 | Sodick Co Ltd | Led lighting device |
JP2013256211A (en) * | 2012-06-13 | 2013-12-26 | Piaa Corp | Lighting device for vehicle |
WO2014185240A1 (en) | 2013-05-13 | 2014-11-20 | 株式会社オートネットワーク技術研究所 | Voltage converter |
JP2016082647A (en) * | 2014-10-14 | 2016-05-16 | 株式会社オートネットワーク技術研究所 | Transformer |
US9800155B2 (en) | 2014-12-15 | 2017-10-24 | Denso Corporation | DC-DC converter |
JP2021136705A (en) * | 2020-02-21 | 2021-09-13 | 三菱電機株式会社 | Lighting device and luminaire |
-
1985
- 1985-07-17 JP JP60157275A patent/JPS6218970A/en active Pending
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100539853B1 (en) * | 2002-02-21 | 2005-12-28 | 엔이씨 도낀 가부시끼가이샤 | Power circuit and method for controlling same |
JP2005045943A (en) * | 2003-07-23 | 2005-02-17 | Matsushita Electric Ind Co Ltd | Step-up/step-down dc-dc converter |
JP2006074965A (en) * | 2004-09-06 | 2006-03-16 | Honda Motor Co Ltd | Power supply device |
JP2010098840A (en) * | 2008-10-16 | 2010-04-30 | Koito Mfg Co Ltd | Voltage step up/down dc-dc converter |
JP2010104161A (en) * | 2008-10-24 | 2010-05-06 | Koito Mfg Co Ltd | Dc-dc converter |
EP2337207A2 (en) | 2009-12-16 | 2011-06-22 | Koito Manufacturing Co., Ltd. | Step-up and step-down DC-DC converter |
US8373401B2 (en) | 2010-02-16 | 2013-02-12 | Koito Manufacturing Co., Ltd. | Step-up/step-down DC-DC converter and vehicle lighting appliance |
JP2011172321A (en) * | 2010-02-16 | 2011-09-01 | Koito Mfg Co Ltd | Step-up/down dc-dc converter and vehicular lighting fixture |
EP2363946A2 (en) | 2010-02-16 | 2011-09-07 | Koito Manufacturing Co., Ltd. | Step-up/step-down DC-DC converter and vehicle lighting appliance |
JP2012018845A (en) * | 2010-07-08 | 2012-01-26 | Sodick Co Ltd | Led lighting device |
JP2013256211A (en) * | 2012-06-13 | 2013-12-26 | Piaa Corp | Lighting device for vehicle |
WO2014185240A1 (en) | 2013-05-13 | 2014-11-20 | 株式会社オートネットワーク技術研究所 | Voltage converter |
JP2016082647A (en) * | 2014-10-14 | 2016-05-16 | 株式会社オートネットワーク技術研究所 | Transformer |
US10224815B2 (en) | 2014-10-14 | 2019-03-05 | Autonetworks Technologies, Ltd. | Voltage converter having a step-up and step-down adjustment circuit |
US9800155B2 (en) | 2014-12-15 | 2017-10-24 | Denso Corporation | DC-DC converter |
JP2021136705A (en) * | 2020-02-21 | 2021-09-13 | 三菱電機株式会社 | Lighting device and luminaire |
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