JPS63179778U - - Google Patents
Info
- Publication number
- JPS63179778U JPS63179778U JP6837287U JP6837287U JPS63179778U JP S63179778 U JPS63179778 U JP S63179778U JP 6837287 U JP6837287 U JP 6837287U JP 6837287 U JP6837287 U JP 6837287U JP S63179778 U JPS63179778 U JP S63179778U
- Authority
- JP
- Japan
- Prior art keywords
- current
- circuit
- detection resistor
- transistor
- main
- 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 description 4
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Dc-Dc Converters (AREA)
Description
第１図は本考案によるスイツチングレギユレー
タの過電流保護回路の一実施例を示す結線図、第
２図は従来のスイツチングレギユレータの過電流
保護回路の一例を示す結線図である。
２……変圧器、２ａ……一次コイル、２ｂ……
制御コイル、３……主電流回路、４……制御回路
、５……保護トランンジスタ、７……主トランジ
スタ、８……電流検出抵抗、１６，１７……ダイ
オード。
Fig. 1 is a wiring diagram showing an example of an overcurrent protection circuit for a switching regulator according to the present invention, and Fig. 2 is a wiring diagram showing an example of an overcurrent protection circuit for a conventional switching regulator. . 2...Transformer, 2a...Primary coil, 2b...
Control coil, 3... Main current circuit, 4... Control circuit, 5... Protection transistor, 7... Main transistor, 8... Current detection resistor, 16, 17... Diode.
Claims (1)
出抵抗とを直列に接続した主電流回路、前記変圧
器に巻かれた制御コイルに誘起する電圧で前記主
トランジスタのベース電流を制御する制御回路お
よび前記電流検出抵抗の電流が所定値を超えると
主トランジスタのベース電流を側路する保護トラ
ンジスタを備えたスイツチングレギユレータの過
電流保護回路において、前記電流検出抵抗と並列
に複数のダイオードの直列回路が接続されている
ことを特徴とするスイツチングレギユレータの過
電流保護回路。 A main current circuit in which a primary coil of a transformer, a main transistor, and a current detection resistor are connected in series, a control circuit that controls a base current of the main transistor with a voltage induced in a control coil wound around the transformer, and the current. In an overcurrent protection circuit for a switching regulator that includes a protection transistor that bypasses the base current of the main transistor when the current in the detection resistor exceeds a predetermined value, a series circuit of a plurality of diodes is connected in parallel with the current detection resistor. An overcurrent protection circuit for a switching regulator, characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6837287U JPS63179778U (en) | 1987-05-07 | 1987-05-07 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6837287U JPS63179778U (en) | 1987-05-07 | 1987-05-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63179778U true JPS63179778U (en) | 1988-11-21 |
Family
ID=30908127
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6837287U Pending JPS63179778U (en) | 1987-05-07 | 1987-05-07 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63179778U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008306921A (en) * | 2007-06-11 | 2008-12-18 | Chung Fu Chou | Switching power circuit |
-
1987
- 1987-05-07 JP JP6837287U patent/JPS63179778U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008306921A (en) * | 2007-06-11 | 2008-12-18 | Chung Fu Chou | Switching power circuit |