JPH01172119U - - Google Patents
Info
- Publication number
- JPH01172119U JPH01172119U JP6815588U JP6815588U JPH01172119U JP H01172119 U JPH01172119 U JP H01172119U JP 6815588 U JP6815588 U JP 6815588U JP 6815588 U JP6815588 U JP 6815588U JP H01172119 U JPH01172119 U JP H01172119U
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- current
- circuit
- constant current
- output
- 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
- 238000006243 chemical reaction Methods 0.000 claims 4
- 230000007423 decrease Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Continuous-Control Power Sources That Use Transistors (AREA)
Description
第１図は本考案に係る定電流電源回路の一実施
例を示す回路図、第２図は第１図の定電流電源回
路において、過電流に対する保護機能を説明する
ための動作特性図である。
１，４……トランジスタ、２，３，５，７……
抵抗、６……ダイオード、８……入力端子、９…
…出力端子、１０……制御電圧入力端子。
FIG. 1 is a circuit diagram showing an embodiment of the constant current power supply circuit according to the present invention, and FIG. 2 is an operating characteristic diagram for explaining the protection function against overcurrent in the constant current power supply circuit of FIG. 1. . 1, 4...transistor, 2, 3, 5, 7...
Resistor, 6...Diode, 8...Input terminal, 9...
...Output terminal, 10...Control voltage input terminal.
Claims (1)
により前記定電流回路の出力電流を制御する電圧
電流変換回路と、 前記定電流回路の出力端と前記電圧電流変換回
路の入力端との間に接続され、前記定電流回路の
出力端電圧が前記制御電圧より低下するのに合わ
せて当該制御電圧をも低下せしめるべく応動する
出力電流制限回路と を具備することを特徴とする定電流電源回路。 (2) 出力電流制限回路は、前記定電流回路の出
力端電圧が前記制御電圧より低下した時に、前記
電圧電流変換回路の入力端から前記定電流回路の
出力端に前記出力端電圧と前記制御電圧との電圧
差に応じた電流を通じるダイオードと、該ダイオ
ードを通じる電流に応じて前記電圧電流変換回路
の入力端に電圧降下を生じせしめる抵抗とから成
ることを特徴とする請求項(1)記載の定電流電源
回路。[Claims for Utility Model Registration] (1) A constant current circuit that outputs a constant current; A voltage-current conversion circuit that receives a control voltage as an input and controls the output current of the constant current circuit using the current obtained as an output; connected between the output terminal of the constant current circuit and the input terminal of the voltage-current conversion circuit, and configured to reduce the control voltage as the output terminal voltage of the constant current circuit decreases below the control voltage. A constant current power supply circuit comprising: a responsive output current limiting circuit; (2) The output current limiting circuit controls the output terminal voltage and the control voltage from the input terminal of the voltage-current conversion circuit to the output terminal of the constant current circuit when the output terminal voltage of the constant current circuit becomes lower than the control voltage. Claim (1) characterized by comprising: a diode through which a current flows depending on the voltage difference between the voltage and the voltage; and a resistor that causes a voltage drop at the input terminal of the voltage-current conversion circuit according to the current passing through the diode. The constant current power supply circuit described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6815588U JPH01172119U (en) | 1988-05-24 | 1988-05-24 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6815588U JPH01172119U (en) | 1988-05-24 | 1988-05-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01172119U true JPH01172119U (en) | 1989-12-06 |
Family
ID=31293479
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6815588U Pending JPH01172119U (en) | 1988-05-24 | 1988-05-24 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01172119U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0236733A (en) * | 1988-07-26 | 1990-02-06 | Toshiba Corp | Battery charger |
-
1988
- 1988-05-24 JP JP6815588U patent/JPH01172119U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0236733A (en) * | 1988-07-26 | 1990-02-06 | Toshiba Corp | Battery charger |
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