JPH0164987U - - Google Patents
Info
- Publication number
- JPH0164987U JPH0164987U JP1987158754U JP15875487U JPH0164987U JP H0164987 U JPH0164987 U JP H0164987U JP 1987158754 U JP1987158754 U JP 1987158754U JP 15875487 U JP15875487 U JP 15875487U JP H0164987 U JPH0164987 U JP H0164987U
- Authority
- JP
- Japan
- Prior art keywords
- switching transistor
- winding
- base drive
- base
- drive winding
- 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
- 238000004804 winding Methods 0.000 claims description 11
- 230000010355 oscillation Effects 0.000 claims 1
- 230000000087 stabilizing effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
Description
第１図は本考案による一実施例を示す回路構成
図、第２図は本考案による電流制限の原理を説明
するための図、第３図は従来例の回路構成図であ
る。
１……トランス、２……１次巻線、３……ベー
ス駆動用巻線、６……スイツチング・トランジス
タ、１２，１３……トランジスタ、２４……抵抗
。
FIG. 1 is a circuit configuration diagram showing an embodiment of the present invention, FIG. 2 is a diagram for explaining the principle of current limiting according to the present invention, and FIG. 3 is a circuit configuration diagram of a conventional example. 1...Transformer, 2...Primary winding, 3...Base drive winding, 6...Switching transistor, 12, 13...Transistor, 24...Resistor.
Claims (1)
線、２次巻線を有するトランスと、該トランスの
１次巻線の一端にコレクタが接続されエミツタが
アースされベースがベース駆動用巻線の一端に接
続されたスイツチング・トランジスタと、出力電
圧を安定化するための制御回路とを備え、上記１
次巻線を流れる電流をスイツチング・トランジス
タで制御するとともに、ベース駆動用巻線に誘起
される電圧をスイツチング・トランジスタのベー
スに正帰還して発振を起こし、該発振により２次
巻線に接続された負荷に電力を供給するようにし
たスイツチング・レギユレータにおいて、 上記ベース駆動用巻線の一端と制御回路の制御
入力端との間に抵抗を介在し、 上記ベース駆動用巻線で検出して得た入力の直
流電圧の増加に追従してスイツチング・トランジ
スタのオン期間が短くなるように該スイツチング
・トランジスタを流れる電流を制限するようにし
たことを特徴とするスイツチング・レギユレータ
。[Claims for Utility Model Registration] A transformer having a magnetically coupled primary winding, a base drive winding, and a secondary winding, a collector connected to one end of the primary winding of the transformer, and an emitter connected to one end of the transformer. A switching transistor that is grounded and whose base is connected to one end of a base drive winding, and a control circuit for stabilizing the output voltage,
The current flowing through the secondary winding is controlled by the switching transistor, and the voltage induced in the base drive winding is positively fed back to the base of the switching transistor to cause oscillation. In a switching regulator configured to supply power to a load, a resistor is interposed between one end of the base drive winding and the control input end of the control circuit, and the output voltage is detected by the base drive winding. 1. A switching regulator, characterized in that the current flowing through the switching transistor is limited so that the on-period of the switching transistor is shortened in accordance with an increase in the input DC voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987158754U JPH0164987U (en) | 1987-10-19 | 1987-10-19 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987158754U JPH0164987U (en) | 1987-10-19 | 1987-10-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0164987U true JPH0164987U (en) | 1989-04-26 |
Family
ID=31439367
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987158754U Pending JPH0164987U (en) | 1987-10-19 | 1987-10-19 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0164987U (en) |
-
1987
- 1987-10-19 JP JP1987158754U patent/JPH0164987U/ja active Pending