JPS6278087U - - Google Patents
Info
- Publication number
- JPS6278087U JPS6278087U JP16973885U JP16973885U JPS6278087U JP S6278087 U JPS6278087 U JP S6278087U JP 16973885 U JP16973885 U JP 16973885U JP 16973885 U JP16973885 U JP 16973885U JP S6278087 U JPS6278087 U JP S6278087U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- excited oscillation
- self
- feedback
- oscillation circuit
- 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
- 230000010355 oscillation Effects 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
Landscapes
- Dc-Dc Converters (AREA)
Description
第１図は本考案に係るスイツチング電源の一実
施例の回路図であり、第２図はこの実施例の動作
説明のためのタイミングチヤートである。第３図
は従来のスイツチング電源の回路図である。
１……入力端子、２……整流回路、３……他励
発振回路、４……負荷、ＴＲ１，ＴＲ２，ＴＲ３
……トランジスタ、Ｔ……トランス、Ｌ１，Ｌ２
，Ｌ３……コイル、Ｒ１，Ｒ２，Ｒ３，Ｒ４，Ｒ
５……抵抗、Ｃ１，Ｃ２，Ｃ３……コンデンサ、
Ｄ２……ダイオード。
FIG. 1 is a circuit diagram of an embodiment of a switching power supply according to the present invention, and FIG. 2 is a timing chart for explaining the operation of this embodiment. FIG. 3 is a circuit diagram of a conventional switching power supply. 1... Input terminal, 2... Rectifier circuit, 3... Separately excited oscillation circuit, 4... Load, TR1, TR2, TR3
...transistor, T...transformer, L1, L2
, L3...Coil, R1, R2, R3, R4, R
5...Resistor, C1, C2, C3...Capacitor,
D2...Diode.
Claims (1)
振回路に切換えるスイツチング電源において、 上記自励発振回路の帰還回路に配された微分回
路と、 上記帰還回路と接地間に配され、上記微分回路
の出力により動作するスイツチング素子とを備え
、 上記帰還回路の帰還パルスを微分して一周期に
対して所定の期間だけ上記スイツチング素子を動
作させて帰還量を減少させることにより上記自励
発振回路の発振を停止させるようにしたことを特
徴とするスイツチング電源。[Scope of Claim for Utility Model Registration] In a switching power supply that uses a self-excited oscillation circuit at startup and switches to an separately excited oscillation circuit after startup, a differentiating circuit disposed in the feedback circuit of the self-excited oscillation circuit; and a switching element disposed between the ground and operated by the output of the differentiating circuit, the feedback pulse of the feedback circuit is differentiated and the switching element is operated for a predetermined period per cycle to reduce the amount of feedback. A switching power supply characterized in that the oscillation of the self-excited oscillation circuit is stopped by causing the self-excited oscillation circuit to stop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16973885U JPS6278087U (en) | 1985-11-06 | 1985-11-06 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16973885U JPS6278087U (en) | 1985-11-06 | 1985-11-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6278087U true JPS6278087U (en) | 1987-05-19 |
Family
ID=31103820
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16973885U Pending JPS6278087U (en) | 1985-11-06 | 1985-11-06 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6278087U (en) |
-
1985
- 1985-11-06 JP JP16973885U patent/JPS6278087U/ja active Pending
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