JPH02138313U - - Google Patents
Info
- Publication number
- JPH02138313U JPH02138313U JP4460089U JP4460089U JPH02138313U JP H02138313 U JPH02138313 U JP H02138313U JP 4460089 U JP4460089 U JP 4460089U JP 4460089 U JP4460089 U JP 4460089U JP H02138313 U JPH02138313 U JP H02138313U
- Authority
- JP
- Japan
- Prior art keywords
- transistor
- reference voltage
- load
- error amplifier
- voltage 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
- 238000001514 detection method Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 4
- 230000002265 prevention Effects 0.000 description 1
Landscapes
- Continuous-Control Power Sources That Use Transistors (AREA)
Description
第1図は本考案の第1の実施例に係わる安定化
電源回路を示す回路図、第2図は本考案の第2の
実施例に係わる安定化電源回路を示す回路図、第
3図は従来の安定化電源回路を示す回路図である
。
1……直流電源、3……制御用トランジスタ、
4……負荷、6……誤差増幅器、8……基準電圧
源、13……過電流防止用トランジスタ、15…
…ツエナーダイオード。
FIG. 1 is a circuit diagram showing a stabilized power supply circuit according to a first embodiment of the present invention, FIG. 2 is a circuit diagram showing a stabilized power supply circuit according to a second embodiment of the present invention, and FIG. 3 is a circuit diagram showing a stabilized power supply circuit according to a second embodiment of the present invention. FIG. 2 is a circuit diagram showing a conventional stabilized power supply circuit. 1... DC power supply, 3... Control transistor,
4...Load, 6...Error amplifier, 8...Reference voltage source, 13...Transistor for overcurrent prevention, 15...
...Zener diode.
Claims (1)
タと、 前記負荷の電圧を検出する電圧検出手段と、 基準電圧源と、 前記電圧検出手段と前記基準電圧源とに接続さ
れ、前記負荷の電圧と前記基準電圧源の基準電圧
との差に対応する出力を前記第1のトランジスタ
のベースに供給する誤差増幅器と、 エミツタが電源に接続され、コレクタが前記第
1のトランジスタのコレクタに接続された第2の
トランジスタと、 前記第2のトランジスタのベースと前記誤差増
幅器の出力端子との間に接続され、前記誤差増幅
器の出力が前記第1のトランジスタに過大電流を
流すレベルに達した時に前記第2のトランジスタ
をオフに制御する制御回路と を具備していることを特徴とする過電流保護回路
を有する安定化電源回路。[Claims for Utility Model Registration] A first transistor whose emitter is connected to a load, a voltage detection means for detecting the voltage of the load, a reference voltage source, and a connection between the voltage detection means and the reference voltage source. an error amplifier that supplies an output corresponding to the difference between the voltage of the load and a reference voltage of the reference voltage source to the base of the first transistor; a second transistor connected to the collector of the second transistor; and a second transistor connected between the base of the second transistor and the output terminal of the error amplifier, the level at which the output of the error amplifier causes excessive current to flow through the first transistor. 1. A stabilized power supply circuit having an overcurrent protection circuit, comprising: a control circuit that controls the second transistor to be turned off when the current is reached.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4460089U JPH02138313U (en) | 1989-04-17 | 1989-04-17 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4460089U JPH02138313U (en) | 1989-04-17 | 1989-04-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH02138313U true JPH02138313U (en) | 1990-11-19 |
Family
ID=31558049
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4460089U Pending JPH02138313U (en) | 1989-04-17 | 1989-04-17 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH02138313U (en) |
-
1989
- 1989-04-17 JP JP4460089U patent/JPH02138313U/ja active Pending
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