JPS63199314U - - Google Patents
Info
- Publication number
- JPS63199314U JPS63199314U JP8735887U JP8735887U JPS63199314U JP S63199314 U JPS63199314 U JP S63199314U JP 8735887 U JP8735887 U JP 8735887U JP 8735887 U JP8735887 U JP 8735887U JP S63199314 U JPS63199314 U JP S63199314U
- Authority
- JP
- Japan
- Prior art keywords
- voltage dividing
- transistor
- output terminal
- resistor
- voltage
- 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
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 230000003287 optical effect Effects 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
- 230000003321 amplification Effects 0.000 claims description 2
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 2
- 230000000087 stabilizing effect Effects 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Power Conversion In General (AREA)
- Continuous-Control Power Sources That Use Transistors (AREA)
- Dc-Dc Converters (AREA)
Description
第１図は、本考案の一実施例を示す回路図であ
る。第２図は、第１図の実施例の動作の一例を示
す曲線図である。第３図は、従来の定電流コンバ
ータの例を示す回路図である。
１…トランス絶縁型のＤＣ―ＤＣコンバータ、
２…出力電流検出回路、３…誤差増幅回路、４，
６…光結合素子、５…負荷、Ｅｉ…直流入力電源
、Ｄ１，Ｄ２…定電圧ダイオード、Ｄ３…全波整
流回路、Ｑ１，Ｑ２…トランジスタ、Ｒ１，Ｒ２
，Ｒ３，Ｒ４，Ｒ５，Ｒ６…抵抗器。
FIG. 1 is a circuit diagram showing an embodiment of the present invention. FIG. 2 is a curve diagram showing an example of the operation of the embodiment shown in FIG. FIG. 3 is a circuit diagram showing an example of a conventional constant current converter. 1...Transformer isolated DC-DC converter,
2... Output current detection circuit, 3... Error amplification circuit, 4,
6... Optical coupling element, 5... Load, Ei... DC input power supply, D1 , D2 ... Constant voltage diode, D3 ... Full wave rectifier circuit, Q1 , Q2 ... Transistor, R1 , R2
, R 3 , R 4 , R 5 , R 6 ...Resistors.
Claims (1)
によつて構成される安定化帰還回路を有し、直流
入力電源を受電して負荷に定電流を供給するトラ
ンス絶縁型定電流コンバータにおいて、正出力と
正出力端子の間に第１の抵抗器を挿入し、負出力
と負出力端子の間に第２の抵抗器を挿入し、前記
正出力とアース間に第１の分圧抵抗を接続し、前
記負出力とアース間に第２の分圧抵抗を接続し、
第１のトランジスタのベースを第１の分圧抵抗の
分圧点に接続し、第１のトランジスタのエミツタ
を第１の定電圧ダイオードを介して前記正出力端
子に接続し、第２のトランジスタのベースを第２
の分圧抵抗の分圧点に接続し、第２のトランジス
タのエミツタを第２の定電圧ダイオードを介して
前記負出力端子に接続し、第１のトラスジスタの
コレクタと第２のトランジスタのコレクタを接続
しその接続点を全波整流回路の入力の一端に接続
し、前記全波整流回路の入力の他端をアースに接
続し、前記全波整流回路の正負の出力を入力とす
る光結合素子の出力を、前記安定化帰還回路の光
結合素子の出力に並列に接続したことを特徴とす
る定電流コンバータの電圧不平衡検出回路。 A transformer isolated constant current converter has a stabilizing feedback circuit composed of an output current detection circuit, an error amplification circuit, and an optical coupling element, and receives a DC input power supply and supplies a constant current to the load. A first resistor is inserted between the positive output terminal and the negative output terminal, a second resistor is inserted between the negative output terminal and the negative output terminal, and a first voltage dividing resistor is connected between the positive output and the ground. , a second voltage dividing resistor is connected between the negative output and ground,
The base of the first transistor is connected to the voltage dividing point of the first voltage dividing resistor, the emitter of the first transistor is connected to the positive output terminal via the first constant voltage diode, and the base of the first transistor is connected to the voltage dividing point of the first voltage dividing resistor. 2nd base
The emitter of the second transistor is connected to the negative output terminal via the second constant voltage diode, and the collector of the first transistor and the collector of the second transistor are connected to the voltage dividing point of the voltage dividing resistor. an optical coupling element, the connection point of which is connected to one end of the input of a full-wave rectifier circuit, the other end of the input of the full-wave rectifier circuit is connected to ground, and the positive and negative outputs of the full-wave rectifier circuit are input. A voltage unbalance detection circuit for a constant current converter, characterized in that an output of the is connected in parallel to an output of an optical coupling element of the stabilizing feedback circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8735887U JPH0534235Y2 (en) | 1987-06-05 | 1987-06-05 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8735887U JPH0534235Y2 (en) | 1987-06-05 | 1987-06-05 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63199314U true JPS63199314U (en) | 1988-12-22 |
| JPH0534235Y2 JPH0534235Y2 (en) | 1993-08-30 |
Family
ID=30944491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8735887U Expired - Lifetime JPH0534235Y2 (en) | 1987-06-05 | 1987-06-05 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0534235Y2 (en) |
-
1987
- 1987-06-05 JP JP8735887U patent/JPH0534235Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0534235Y2 (en) | 1993-08-30 |
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