JPS5875225A - Control circuit for switching regulator - Google Patents
Control circuit for switching regulatorInfo
- Publication number
- JPS5875225A JPS5875225A JP17222281A JP17222281A JPS5875225A JP S5875225 A JPS5875225 A JP S5875225A JP 17222281 A JP17222281 A JP 17222281A JP 17222281 A JP17222281 A JP 17222281A JP S5875225 A JPS5875225 A JP S5875225A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- switching regulator
- output
- error amplifier
- comparator
- 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
- 230000008878 coupling Effects 0.000 claims description 8
- 238000010168 coupling process Methods 0.000 claims description 8
- 238000005859 coupling reaction Methods 0.000 claims description 8
- 230000003287 optical effect Effects 0.000 claims description 8
- 230000003321 amplification Effects 0.000 abstract description 2
- 238000003199 nucleic acid amplification method Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 7
- 239000003990 capacitor Substances 0.000 description 4
- 238000009499 grossing Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
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
- H02M3/33507—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 with automatic control of the output voltage or current, e.g. flyback converters
- H02M3/33523—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 with automatic control of the output voltage or current, e.g. flyback converters with galvanic isolation between input and output of both the power stage and the feedback loop
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
Description
【発明の詳細な説明】
この発明はスイッチングレギーレ〜りの制御回路に関す
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a control circuit for switching regulators.
従来、スイッチングレギュレータの制御回路は集積回路
技術により第１図に示す回路が同一素子内に形成されて
おり、このためすべての入出力端子は同一のアースライ
ンのもとに動作して−る。Conventionally, in the control circuit of a switching regulator, the circuit shown in FIG. 1 is formed in the same element using integrated circuit technology, and therefore all input and output terminals operate under the same ground line.
尚第１図に於いて、１は基準電圧回路、２は誤差増幅器
、３は発振器、４は比較器、５はパルス増幅回路、１２
は誤差増幅器２の入力端子、１３は誤差増幅器２の出力
端子、１５ａはこの制御回路の接地端子、１６はこの制
御回路の出力端子、１７ａはこの制御回路の電源入力端
子、１８．１９は発振器３のタイミング定数接続端子で
ある。In FIG. 1, 1 is a reference voltage circuit, 2 is an error amplifier, 3 is an oscillator, 4 is a comparator, 5 is a pulse amplification circuit, 12
is the input terminal of the error amplifier 2, 13 is the output terminal of the error amplifier 2, 15a is the ground terminal of this control circuit, 16 is the output terminal of this control circuit, 17a is the power input terminal of this control circuit, 18.19 is the oscillator This is the timing constant connection terminal of No. 3.
従って、この様なスイッチングレギュレータの制御回路
を使用して第２図に示す様なスイッチングレギュレータ
を構成する場合、補助電源回路３２が必要となる。この
種の補助電源回路３２は比較的小容量の電源トランジス
タ３３と、整流器３４、平滑コンデンサ３５とで構成さ
れる回路を使用する場合が多いが、該電源トランス３３
は商用電源２１で動作しているため重量１体積が大きく
、スイッチングレギュレータ自体を小形化する際太きな
障害となっている。Therefore, when constructing a switching regulator as shown in FIG. 2 using such a switching regulator control circuit, an auxiliary power supply circuit 32 is required. This type of auxiliary power supply circuit 32 often uses a circuit composed of a relatively small-capacity power supply transistor 33, a rectifier 34, and a smoothing capacitor 35;
Because it operates on the commercial power supply 21, it has a large weight and volume, which is a major obstacle when downsizing the switching regulator itself.
また、このような構成ではスイッチングレギュレータの
制御回路はスイッチングレギュレータの出力回路と同一
アースを取る必要から、接地ライン４３はスイッチング
レギュレータのマイナス出力端子４２に接続される。こ
のため制御回路の出力端子１６を直接出力トランジスタ
２４のベースに接続できず絶縁用パルストランス３１が
必要になる。Further, in such a configuration, since the control circuit of the switching regulator needs to be connected to the same ground as the output circuit of the switching regulator, the ground line 43 is connected to the negative output terminal 42 of the switching regulator. Therefore, the output terminal 16 of the control circuit cannot be directly connected to the base of the output transistor 24, and an insulating pulse transformer 31 is required.
尚第２図に於いて、２１は商用電源、２２は整流器、２
３は平滑用コンデンサ、２４は出力トランジスタ、２５
は出カドランス、２６は整流器、２７はチョークコイル
、２８は平滑用コンデンサ、２９．３０は発振器３のタ
イミング定数接続端子、３１Ｈ絶縁用パルストランス、
３２は補助電源回路、３３は電源トランス、４１．４２
は夫々スイッチングレギュレータの■出力端子、■出力
端子１４３はスイッチングレギュレータの一次側接地ラ
インである。In Fig. 2, 21 is a commercial power supply, 22 is a rectifier, and 2
3 is a smoothing capacitor, 24 is an output transistor, 25
26 is a rectifier, 27 is a choke coil, 28 is a smoothing capacitor, 29.30 is a timing constant connection terminal for oscillator 3, 31H is an insulating pulse transformer,
32 is an auxiliary power supply circuit, 33 is a power transformer, 41.42
are the (1) output terminal and (2) output terminal 143 of the switching regulator, respectively, and are the primary side ground line of the switching regulator.
この発明は従来のもののこのような欠点ｔＷ、ム（スイ
ッチングレギュレータの小形化、および回路の簡略化を
可能とするスイッチングレギーレータの制御回路を得る
ことを目的としている。It is an object of the present invention to provide a control circuit for a switching regulator that can reduce the size of the switching regulator and simplify the circuit.
本発明によると基準電圧回路と、誤差増幅器と、発振器
と、該発振器の出力信号を１つの入力端子に接続し、前
記誤差増幅器の出力信号によって制御信号を出力する比
較器と、該比較器の出力信号を入力とするパルス増幅器
と、発光ダイオードと受光トランジスタよりなる光結合
回路とを含み、前記発光ダイオードが前記誤差増幅器の
出力側に接続され、前記受光トランジスタが前記比較器
の他方の入力端子に接続される事を特徴とするスイッチ
ングレギュレータの制御回路が得られる。According to the present invention, a reference voltage circuit, an error amplifier, an oscillator, a comparator which connects the output signal of the oscillator to one input terminal and outputs a control signal based on the output signal of the error amplifier, and a comparator that outputs a control signal based on the output signal of the error amplifier; The light-emitting diode is connected to the output side of the error amplifier, and the light-receiving transistor is connected to the other input terminal of the comparator. A switching regulator control circuit is obtained, which is characterized in that it is connected to the switching regulator.
以下、本発明を図面を用いて詳細に説明する。Hereinafter, the present invention will be explained in detail using the drawings.
第３図は本発明の一実施例の一部をブロックで示す回路
図で、第１図と同一参照数字は同一部分を示している。FIG. 3 is a block circuit diagram showing a part of an embodiment of the present invention, and the same reference numerals as in FIG. 1 indicate the same parts.
スイッチングレギーレータの出力電圧を検出し、誤差増
幅している回路８と、誤差 ゛・：Ｉ増幅器
２の出力信号に応じたパルス制御信号をつくる回路１０
とを各々独立の素子上に形成するとともに、光結合回路
９を前記誤差増幅器２の出力と比較器４０入力間に接続
し、回路８と１０と全電気的に絶縁する。A circuit 8 that detects the output voltage of the switching regulator and amplifies the error, and a circuit 10 that generates a pulse control signal according to the output signal of the error ゛・:I amplifier 2.
are formed on independent elements, and the optical coupling circuit 9 is connected between the output of the error amplifier 2 and the input of the comparator 40, and is completely electrically isolated from the circuits 8 and 10.
第５図は、この素子の構成の一例である。例えば、素子
４５を光結合回路９の発光ダイオード６とし、素子４６
金光結合回路９の受光トランジスタ７とすれば、素子４
５と素子４６とは絶縁材料４７をはさんで対向するため
、互いに電気的な絶縁が図れる。FIG. 5 shows an example of the structure of this element. For example, the element 45 is the light emitting diode 6 of the optical coupling circuit 9, and the element 46 is the light emitting diode 6 of the optical coupling circuit 9.
If the light-receiving transistor 7 of the gold optical coupling circuit 9 is the element 4
Since the element 5 and the element 46 face each other with the insulating material 47 in between, they can be electrically insulated from each other.
第４図は第３図に示すスイッチングレギーレータの制御
回路をスイッチングレギーレータに用いた場合の応用回
路である。誤差増幅器２を始めとする回路の電源入力端
子１４および接地端子１１は、それぞれスイッチングレ
ギュレータの■およびＯ出力端子４１および４２に接続
されている。FIG. 4 shows an applied circuit when the control circuit for the switching regulator shown in FIG. 3 is used in a switching regulator. The power supply input terminal 14 and ground terminal 11 of the circuit including the error amplifier 2 are connected to the switching regulator's ■ and O output terminals 41 and 42, respectively.
一方、この制御回路の出力端子１６および出力側の電源
入力端子１７および接地端子１５は、この制御回路が、
光結合回路９により、入出力間が絶縁されているため、
それぞれ出力トランジスタ２４のベース回路および、バ
イアス回路３６の出力端 ５−
子４４および、１次側接地ライン４３にそれぞれ接続さ
れている。On the other hand, the output terminal 16 of this control circuit, the power input terminal 17 on the output side, and the ground terminal 15 are connected to the output terminal 16 of this control circuit.
Since the input and output are insulated by the optical coupling circuit 9,
They are connected to the base circuit of the output transistor 24, the output terminal 44 of the bias circuit 36, and the primary ground line 43, respectively.
このようにすると、従来必要とされていた第２図に示さ
れる絶縁用パルストランス３１は不要トなり、重量の軽
減、小形化に大きな効果がある。In this way, the insulating pulse transformer 31 shown in FIG. 2, which was conventionally required, becomes unnecessary, which has a great effect on weight reduction and miniaturization.
本発明によると、スイッチングレギーレータの小型化お
よび回路の簡略化ができる効果がある。According to the present invention, there is an effect that the switching regulator can be downsized and the circuit can be simplified.
第１図は従来のスイッチングレギーレータの制御回路を
示す図、第２図は従来のスイッチングレギュレータ制御
回路をフォワード方式スイッチングレギュレータに応用
した例を示す図、第３図は本発明の一実施例を示す図、
第４図は第３図に示すものをスイッチングレギュレータ
に適用ジター例の回路図、第５図は本発明に於いて用い
る光結合回路の一例の構造図である。
１・・・・・・基準電圧回路、２・・・・・・誤差増幅
器、３・・・・・・発振器、４・・・・・・比較器、５
・・・・・・パルス増幅回路、６・・・・・・発光ダイ
オード、７・・・・・・受光トランジスタ、 ６−
９・・・・・・光結合回路、１１・・・・・・回路８の
接地端子、１２・・・・・・誤差増幅器２の入力端子、
１３・・・・・・誤差増幅器２の出力端子、１４・・・
・・・回路８の電源入力端子、１５・・・・・・制御回
路の接地端子、１６・・・・・・制御回路の出力端子、
１７．１７ａ・・・・・制御回路の電源入力端子、１８
．１９・・・・・・発振器３のタイミング定数接続端子
、２１・・・・・・商用電源、２２・・・・・・整流器
、２３・・・・・・平滑用コンデンサ、２４・・・・・
・出力トランジスタ、２５・・・・・出カドランス、２
９゜３０・・・・・・発振器３のタイミング定数、３１
・・・・・絶縁用パルストランス、３２・・・・・・補
助電源回路、３３・・・・・電源トランス、３６・・・
・・・バイアス回路、４１・・・・・・スイッチングレ
ギュレータの■出力端子、４２・・・・・・スイッチン
グレギュレータの■出力端子、４３・・・・・・スイッ
チングレギュレータの１次側接地ライン、４４・・・・
・・バイアス回路３６の出力端子。
７−
／’？ ／θ
第 ／ 閉
め ２ 口
ｆ３ヨ
″琴摺畳１げｈ弓７；
養５ 閏Fig. 1 is a diagram showing a conventional switching regulator control circuit, Fig. 2 is a diagram showing an example in which the conventional switching regulator control circuit is applied to a forward type switching regulator, and Fig. 3 is a diagram showing an example of an embodiment of the present invention. diagram showing,
FIG. 4 is a circuit diagram of an example of a jitter applied to a switching regulator shown in FIG. 3, and FIG. 5 is a structural diagram of an example of an optical coupling circuit used in the present invention. 1... Reference voltage circuit, 2... Error amplifier, 3... Oscillator, 4... Comparator, 5
...Pulse amplifier circuit, 6 ... Light emitting diode, 7 ... Light receiving transistor, 6-9 ... Optical coupling circuit, 11 ...... Ground terminal of circuit 8, 12... Input terminal of error amplifier 2,
13... Output terminal of error amplifier 2, 14...
... Power input terminal of circuit 8, 15 ... Ground terminal of control circuit, 16 ... Output terminal of control circuit,
17.17a... Control circuit power input terminal, 18
．． 19... Timing constant connection terminal of oscillator 3, 21... Commercial power supply, 22... Rectifier, 23... Smoothing capacitor, 24...・
・Output transistor, 25...Output transistor, 2
9゜30... Timing constant of oscillator 3, 31
...Insulating pulse transformer, 32...Auxiliary power supply circuit, 33...Power transformer, 36...
... Bias circuit, 41 ... ■Output terminal of switching regulator, 42 ... ■Output terminal of switching regulator, 43 ...... Primary side ground line of switching regulator, 44...
... Output terminal of bias circuit 36. 7- /'? /θ th / closing 2 mouth f3 yo'' kotozuri tatami 1geh bow 7;
Claims (1)
出力信号音１つの入力端子に接現し、前記誤差増幅器の
出力信号によって制御信号全出方する比較器と、該比較
器の出力信号を大刀とするパルス増櫂器と、発光ダイオ
ードと受光トランジスタよりなる光結合回路とを含み、
前記発光ダイオードが前記誤差増幅器の出方側に接続さ
れ、前記受光トランジスタが前記比較器の他方の入力端
子に接続される事を特徴とするスイッチングレギュレー
タの制御回路。a reference voltage circuit, an error amplifier, an oscillator, a comparator connected to one input terminal of the output signal of the oscillator and whose control signal is all outputted by the output signal of the error amplifier, and an output signal of the comparator. It includes a pulse intensifier as a major sword, and an optical coupling circuit consisting of a light emitting diode and a light receiving transistor.
A control circuit for a switching regulator, wherein the light emitting diode is connected to an output side of the error amplifier, and the light receiving transistor is connected to the other input terminal of the comparator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17222281A JPS5875225A (en) | 1981-10-28 | 1981-10-28 | Control circuit for switching regulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17222281A JPS5875225A (en) | 1981-10-28 | 1981-10-28 | Control circuit for switching regulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5875225A true JPS5875225A (en) | 1983-05-06 |
Family
ID=15937852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17222281A Pending JPS5875225A (en) | 1981-10-28 | 1981-10-28 | Control circuit for switching regulator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5875225A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002071588A1 (en) * | 2001-03-01 | 2002-09-12 | Di/Dt, Inc. | Method and apparatus for providing an initial bias and enable signal for a power converter |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5151717A (en) * | 1974-11-01 | 1976-05-07 | Hitachi Ltd | ZETSUENGATACHOKURYUANTEIKADENGENSOCHI |
-
1981
- 1981-10-28 JP JP17222281A patent/JPS5875225A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5151717A (en) * | 1974-11-01 | 1976-05-07 | Hitachi Ltd | ZETSUENGATACHOKURYUANTEIKADENGENSOCHI |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002071588A1 (en) * | 2001-03-01 | 2002-09-12 | Di/Dt, Inc. | Method and apparatus for providing an initial bias and enable signal for a power converter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS5875225A (en) | Control circuit for switching regulator | |
| JPH08149807A (en) | Power supply control stabilizing circuit | |
| JP3233266B2 (en) | Switching power supply | |
| KR910009202Y1 (en) | Horizontal output automatic control circuit | |
| JPH0880037A (en) | Switching power supply device | |
| JP2754643B2 (en) | Bright fluctuation absorption circuit | |
| JPH0246092Y2 (en) | ||
| SU1372289A1 (en) | D.c.voltage pulse stabilizer | |
| JPH0355976A (en) | View finder | |
| JPS5988726U (en) | voltage stabilization circuit | |
| SU767736A1 (en) | D-c voltage pulse stabilizer | |
| JPH0522989Y2 (en) | ||
| JPH0417536A (en) | Dc-dc converter | |
| JPS6022798U (en) | Photoelectric element light intensity correction circuit | |
| JPS63287365A (en) | Power-supply device | |
| JPS59187826U (en) | Stabilized power supply circuit | |
| JPS6123732U (en) | Photo switching circuit | |
| JPS58116071A (en) | High-frequency switching direct current power supply | |
| JPS62163564A (en) | Power circuit | |
| JPS59202714A (en) | Amplifying circuit | |
| JPH0414269A (en) | Photo coupler | |
| JPS6116617U (en) | Integrated circuit for stabilized power supply | |
| JPS63122306A (en) | Grounded circuit for integrated circuit | |
| JPS63294261A (en) | Switching regulator | |
| JP2003143848A (en) | Dc-dc converter |