JPH0321981U - - Google Patents
Info
- Publication number
- JPH0321981U JPH0321981U JP8192489U JP8192489U JPH0321981U JP H0321981 U JPH0321981 U JP H0321981U JP 8192489 U JP8192489 U JP 8192489U JP 8192489 U JP8192489 U JP 8192489U JP H0321981 U JPH0321981 U JP H0321981U
- Authority
- JP
- Japan
- Prior art keywords
- base
- circuit
- transistor
- voltage
- overcurrent protection
- 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図は本考案の実施例の回路図、第２図は従
来の過電流保護回路の回路図である。
１……電流検出回路、２……ツエナダイオード
、３，８……抵抗器、４……トランジスタ、５…
…出力電圧検出回路、６……発振器、７……比較
器。
FIG. 1 is a circuit diagram of an embodiment of the present invention, and FIG. 2 is a circuit diagram of a conventional overcurrent protection circuit. 1... Current detection circuit, 2... Zener diode, 3, 8... Resistor, 4... Transistor, 5...
...output voltage detection circuit, 6...oscillator, 7...comparator.
Claims (1)
回路の出力電圧を分圧してスイツチング用のトラ
ンジスタのベースに与える分圧回路をもち前記ト
ランジスタのエミツタ・ベース間をスイツチング
レギユレータのパルス幅制御手段の制御入力端に
接続した過電流保護回路において、前記分圧回路
は前記検出回路の出力端および前記トランジスタ
のベース間に接続したツエナダイオードと前記ト
ランジスタのベースおよびエミツタ間に接続した
抵抗器とを有することを特徴とする過電流保護回
路。 It has a voltage divider circuit that divides the output voltage of a current detection circuit that generates a voltage proportional to the primary current and applies it to the base of a switching transistor. In an overcurrent protection circuit connected to a control input terminal of the control means, the voltage dividing circuit includes a Zener diode connected between the output terminal of the detection circuit and the base of the transistor, and a resistor connected between the base and emitter of the transistor. An overcurrent protection circuit comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8192489U JPH0321981U (en) | 1989-07-11 | 1989-07-11 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8192489U JPH0321981U (en) | 1989-07-11 | 1989-07-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0321981U true JPH0321981U (en) | 1991-03-06 |
Family
ID=31628287
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8192489U Pending JPH0321981U (en) | 1989-07-11 | 1989-07-11 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0321981U (en) |
-
1989
- 1989-07-11 JP JP8192489U patent/JPH0321981U/ja active Pending