JPH0171983U - - Google Patents
Info
- Publication number
- JPH0171983U JPH0171983U JP1987167690U JP16769087U JPH0171983U JP H0171983 U JPH0171983 U JP H0171983U JP 1987167690 U JP1987167690 U JP 1987167690U JP 16769087 U JP16769087 U JP 16769087U JP H0171983 U JPH0171983 U JP H0171983U
- Authority
- JP
- Japan
- Prior art keywords
- resistor
- transistor
- voltage drop
- switching
- series
- 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
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- Dc-Dc Converters (AREA)
Description
第１図はこの考案の実施例であるスイツチング
レギユレータの回路図を示し、第２図Ａ，Ｂは通
常時、負荷短絡時の抵抗Ｒ４の電圧降下の変化を
示す図である。また第３図は従来のスイツチング
レギユレータの回路図、第４図Ａ，Ｂは通常時、
負荷短絡時の抵抗Ｒ４の電圧降下の変化を示して
いる。
Ｑ１―スイツチングトランジスタ、Ｑ３―過電
流制御トランジスタ、Ｒ３―第１の抵抗、Ｒ４―
第２の抵抗、ＦＲＤ―フライホイルダイオード、
Ｌ―インダクタンス、Ｃ―平滑コンデンサ。
FIG. 1 shows a circuit diagram of a switching regulator that is an embodiment of this invention, and FIGS. 2A and 2B are diagrams showing changes in voltage drop across resistor R4 during normal operation and when a load is short-circuited. Also, Fig. 3 is a circuit diagram of a conventional switching regulator, and Fig. 4 A and B are normal state diagrams.
It shows the change in voltage drop across resistor R4 when the load is short-circuited. Q1-Switching transistor, Q3-Overcurrent control transistor, R3-First resistor, R4-
Second resistor, FRD-flywheel diode,
L-inductance, C-smoothing capacitor.
Claims (1)
イルダイオードとＬＣ平滑回路が接続され、且つ
定電圧回路を備えるスイツチングレギユレータに
おいて、 前記フライホイルダイオードに直列接続された
第１の抵抗と、 電源ラインに直列接続された第２の抵抗と、 前記第１の抵抗の降下電圧と前記第２の抵抗の
降下電圧の和がベース、エミツタ間に印加され、
オンすることによつて前記スイツチングトランジ
スタのオフ信号を出力する過電流制御トランジス
タと、 を備えてなるスイツチングレギユレータ。[Claims for Utility Model Registration] In a switching regulator, a flywheel diode and an LC smoothing circuit are connected to the output side of a switching transistor, and a constant voltage circuit is provided, a first transistor connected in series to the flywheel diode. a second resistor connected in series to a power supply line; the sum of the voltage drop of the first resistor and the voltage drop of the second resistor is applied between the base and the emitter;
A switching regulator comprising: an overcurrent control transistor that outputs an off signal for the switching transistor when turned on.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987167690U JPH0171983U (en) | 1987-10-30 | 1987-10-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987167690U JPH0171983U (en) | 1987-10-30 | 1987-10-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0171983U true JPH0171983U (en) | 1989-05-15 |
Family
ID=31456211
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987167690U Pending JPH0171983U (en) | 1987-10-30 | 1987-10-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0171983U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5449A (en) * | 1977-12-26 | 1979-01-05 | Kyowa Electric & Chemical | Continuous coating apparatus |
-
1987
- 1987-10-30 JP JP1987167690U patent/JPH0171983U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5449A (en) * | 1977-12-26 | 1979-01-05 | Kyowa Electric & Chemical | Continuous coating apparatus |