JPS5947287U - constant current circuit - Google Patents
constant current circuitInfo
- Publication number
- JPS5947287U JPS5947287U JP14185482U JP14185482U JPS5947287U JP S5947287 U JPS5947287 U JP S5947287U JP 14185482 U JP14185482 U JP 14185482U JP 14185482 U JP14185482 U JP 14185482U JP S5947287 U JPS5947287 U JP S5947287U
- Authority
- JP
- Japan
- Prior art keywords
- winding
- current
- rectifying
- output
- main transformer
- 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.)
- Granted
Links
Landscapes
- Dc-Dc Converters (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は、従来形の定電流回路の構成を示す電気回路図
、第２図および第３図は、第１図の回路の特性を示すグ
ラフ、第４図は、本考案の１実施例に係わる定電流回路
の構成を示す電気回路図、そして第５図および第６図は
、第４図の回路の特性を示すグラフである。
１゛、・・・メイントランス、Ｔ２・・・サブトランス
、Ｎ１・・・第１巻線、Ｎ２・・・第２巻線、Ｎ３・・
・第３巻線、Ｎ。
・・・第４巻線、Ｎ２．・・・１次巻線、Ｎ２２・・・
２次巻線、ＴＲ１・・・メイントランジスタ、ＴＲ２・
・・制御用スイッチングトランジスタ、Ｄｌ、 Ｄ２．
Ｄ３． Ｄ、、、 Ｄ６． Ｄ６・・・ダイオード、
ｃ、、 ｃ２． ｃ３． ｃ、・・占ンテンサ、Ｒ１・
・・ベース抵抗、ＶＲ・・・電流検出用可変抵抗、ＲＬ
・・・負荷抵抗、ＥＩＮ・・・入力電源、Ｅ、・・・起
動用電源ミＰＷＭ・・・パルス幅変調回路、ＡＭＰ・・
・差動増幅器、Ｖ１’ｌＥＦ・・・基準電圧。Figure 1 is an electric circuit diagram showing the configuration of a conventional constant current circuit, Figures 2 and 3 are graphs showing the characteristics of the circuit in Figure 1, and Figure 4 is an embodiment of the present invention. FIGS. 5 and 6 are graphs showing the characteristics of the circuit shown in FIG. 4. FIGS. 1゛,...Main transformer, T2...Sub transformer, N1...First winding, N2...Second winding, N3...
・Third winding, N. ... 4th winding, N2. ...Primary winding, N22...
Secondary winding, TR1... Main transistor, TR2...
... Control switching transistor, Dl, D2.
D3. D,, D6. D6...diode,
c,, c2. c3. c, ・・Tensa, R1・
...Base resistance, VR...variable resistance for current detection, RL
...Load resistance, EIN...Input power supply, E, ...Start-up power supply, PWM...Pulse width modulation circuit, AMP...
・Differential amplifier, V1'lEF...Reference voltage.
Claims (1)
源からメイントランスの第１巻線に供給さ、れる電流を
オンオフするパワートランジスタ、第２巻線に接続され
出力直流電流を作成する第１整流平滑回路、２次巻線が
該パワートランジスタのベースに接続されたサブトラン
ス、該サブトランスの１次巻線電流をオンオフするスイ
ッチングトランジスタ、出力直流電流に応じてパルス幅
か変化するパルス信号を発生りて該スイッチングトラン
ジスタのベースに供給するパルス発生回路、メイントラ
ンスの第３巻線に接続され入力電源電圧に比例する電圧
を発生する第２整流平滑回路、およびメイントランスの
第４巻線に接続され出力電圧に比例する電圧を発生する
第３整流平滑回路を具備し、第２および第３の整流平滑
回路の出力電圧を加算してサブトランスの１次巻線電流
を供給することを特徴とする定電流回路。A main transformer having first to fourth windings includes a power transistor that turns on and off the current supplied from the input power source to the first winding of the main transformer, and a power transistor that is connected to the second winding and creates an output DC current. 1 rectifying and smoothing circuit, a subtransformer whose secondary winding is connected to the base of the power transistor, a switching transistor that turns on and off the primary winding current of the subtransformer, and a pulse signal whose pulse width changes according to the output DC current. a second rectifying and smoothing circuit connected to the third winding of the main transformer and generating a voltage proportional to the input power supply voltage, and a fourth winding of the main transformer. A third rectifying and smoothing circuit is connected to the output voltage to generate a voltage proportional to the output voltage, and the output voltages of the second and third rectifying and smoothing circuits are added to supply the primary winding current of the sub-transformer. Characteristic constant current circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14185482U JPS5947287U (en) | 1982-09-21 | 1982-09-21 | constant current circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14185482U JPS5947287U (en) | 1982-09-21 | 1982-09-21 | constant current circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5947287U true JPS5947287U (en) | 1984-03-29 |
| JPH019273Y2 JPH019273Y2 (en) | 1989-03-14 |
Family
ID=30317140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14185482U Granted JPS5947287U (en) | 1982-09-21 | 1982-09-21 | constant current circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5947287U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62107674A (en) * | 1985-11-05 | 1987-05-19 | Hitachi Lighting Ltd | Dc stabilized power source |
-
1982
- 1982-09-21 JP JP14185482U patent/JPS5947287U/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62107674A (en) * | 1985-11-05 | 1987-05-19 | Hitachi Lighting Ltd | Dc stabilized power source |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH019273Y2 (en) | 1989-03-14 |
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