JPH0311385U - - Google Patents
Info
- Publication number
- JPH0311385U JPH0311385U JP6934589U JP6934589U JPH0311385U JP H0311385 U JPH0311385 U JP H0311385U JP 6934589 U JP6934589 U JP 6934589U JP 6934589 U JP6934589 U JP 6934589U JP H0311385 U JPH0311385 U JP H0311385U
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- circuit
- supply circuit
- detection means
- short
- 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 3
- 238000010586 diagram Methods 0.000 description 4
- 230000003321 amplification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Landscapes
- Dc-Dc Converters (AREA)
Description
第１図は、本考案の直流電源回路における短絡
保護回路の一実施例を示す回路図、第２図は、本
考案の直流電源回路における短絡保護回路の他の
実施例を示す回路図、第３図は、短絡保護回路の
動作点を示す図、第４図は、従来の直流電源回路
における短絡保護回路の一例を示す回路図である
。
１……入力端子、２……出力端子、３……接地
端子、４……トランス、５……誤差増幅回路、６
……パルス幅変調回路、７……パルス発生回路、
８……ラツチ回路、９……基準電圧源回路、１０
……半導体集積回路、１１……出力端子、１２…
…レベル検出器、Ｑ１……スイツチング用のトラ
ンジスタ、Ｒ３，Ｒ４……分圧抵抗。
FIG. 1 is a circuit diagram showing one embodiment of the short-circuit protection circuit in the DC power supply circuit of the present invention, and FIG. 2 is a circuit diagram showing another embodiment of the short-circuit protection circuit in the DC power supply circuit of the present invention. FIG. 3 is a diagram showing operating points of a short-circuit protection circuit, and FIG. 4 is a circuit diagram showing an example of a short-circuit protection circuit in a conventional DC power supply circuit. 1...Input terminal, 2...Output terminal, 3...Ground terminal, 4...Transformer, 5...Error amplification circuit, 6
...Pulse width modulation circuit, 7...Pulse generation circuit,
8... Latch circuit, 9... Reference voltage source circuit, 10
...Semiconductor integrated circuit, 11...Output terminal, 12...
...Level detector, Q1 ...Switching transistor, R3 , R4 ...Voltage dividing resistor.
Claims (1)
該分圧抵抗からの分圧電圧によつて、該直流電源
回路の出力電圧が所定の電位以下に降下したこと
を検出する検出手段と、該検出手段からの信号に
基づき該直流電源回路の入力側の電源を遮断する
手段とからなることを特徴とする直流電源回路に
おける短絡保護回路。 (2) 前記直流電源回路がパルス幅変調方式のス
イツチングレギユレータであつて、前記入力側の
電源を遮断する手段が、前記検出手段からの信号
に基づき該直流電源回路の入力側に設けられたス
イツチング素子をオフ状態とする手段からなるこ
とを特徴とする実用新案登録請求の範囲第１項記
載の直流電源回路における短絡保護回路。[Claims for Utility Model Registration] (1) A voltage dividing resistor is provided in the output stage of the DC power supply circuit,
detection means for detecting that the output voltage of the DC power supply circuit has dropped below a predetermined potential due to the divided voltage from the voltage division resistor; and an input of the DC power supply circuit based on a signal from the detection means. A short-circuit protection circuit in a DC power supply circuit, characterized by comprising means for cutting off the power supply on the side. (2) The DC power supply circuit is a pulse width modulation type switching regulator, and means for cutting off the power on the input side is provided on the input side of the DC power supply circuit based on a signal from the detection means. A short-circuit protection circuit for a DC power supply circuit according to claim 1, characterized in that the circuit comprises means for turning off a switching element that is switched off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6934589U JPH0311385U (en) | 1989-06-14 | 1989-06-14 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6934589U JPH0311385U (en) | 1989-06-14 | 1989-06-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0311385U true JPH0311385U (en) | 1991-02-04 |
Family
ID=31604567
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6934589U Pending JPH0311385U (en) | 1989-06-14 | 1989-06-14 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0311385U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55103079A (en) * | 1979-01-31 | 1980-08-06 | Toshiba Corp | Switching regulator |
-
1989
- 1989-06-14 JP JP6934589U patent/JPH0311385U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55103079A (en) * | 1979-01-31 | 1980-08-06 | Toshiba Corp | Switching regulator |
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