JPS63127283U - - Google Patents
Info
- Publication number
- JPS63127283U JPS63127283U JP2025087U JP2025087U JPS63127283U JP S63127283 U JPS63127283 U JP S63127283U JP 2025087 U JP2025087 U JP 2025087U JP 2025087 U JP2025087 U JP 2025087U JP S63127283 U JPS63127283 U JP S63127283U
- Authority
- JP
- Japan
- Prior art keywords
- switching transistor
- circuit
- switching
- power supply
- voltage detection
- 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
- 238000009499 grossing Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 1
Landscapes
- Dc-Dc Converters (AREA)
Description
第１図は本考案の第１実施例によるスイツチン
グ電源装置の回路図、第２図はその各部の波形を
示す波形図、第３図は従来のスイツチング電源装
置の一例を示す回路図である。
１，２……入力端子、３……電源、４……負荷
、７……電圧検出回路、８……スイツチングトラ
ンジスタ駆動回路、９……定電流回路、Ｄ１……
ダイオードブリツジ、Ｄ２，Ｄ４，Ｄ５……ダイ
オード、Ｄ３……ツエナダイオード、Ｔｒ１〜Ｔ
ｒ８……トランジスタ、Ｃ……平滑コンデンサ。
FIG. 1 is a circuit diagram of a switching power supply according to a first embodiment of the present invention, FIG. 2 is a waveform diagram showing waveforms of various parts thereof, and FIG. 3 is a circuit diagram showing an example of a conventional switching power supply. 1, 2... Input terminal, 3... Power supply, 4... Load, 7... Voltage detection circuit, 8... Switching transistor drive circuit, 9... Constant current circuit, D1...
Diode bridge, D2, D4, D5...Diode, D3...Zena diode, Tr1~T
r8...transistor, C...smoothing capacitor.
Claims (1)
スタと、 前記スイツチングトランジスタの出力端に接続
された平滑回路と、 前記平滑回路の平滑出力電圧の電圧を検出する
電圧検出回路と、 前記電圧検出回路からの電圧検出出力に基づい
て前記スイツチングトランジスタを駆動するスイ
ツチングトランジスタ駆動回路と、を有するスイ
ツチング電源装置であつて、 電源入力端に接続された定電流回路を有し、 前記スイツチングトランジスタ駆動回路は前記
スイツチングトランジスタを駆動する制御トラン
ジスタを有するものであり、前記定電流回路を介
して該制御トランジスタにベース電流を与えるよ
うにしたことを特徴とするスイツチング電源装置
。[Claims for Utility Model Registration] A switching transistor that intermittents DC power input, a smoothing circuit connected to the output terminal of the switching transistor, and a voltage detection circuit that detects the smoothed output voltage of the smoothing circuit. , a switching transistor drive circuit that drives the switching transistor based on a voltage detection output from the voltage detection circuit, the switching power supply having a constant current circuit connected to a power supply input terminal; A switching power supply device characterized in that the switching transistor drive circuit has a control transistor for driving the switching transistor, and a base current is applied to the control transistor via the constant current circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2025087U JPS63127283U (en) | 1987-02-13 | 1987-02-13 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2025087U JPS63127283U (en) | 1987-02-13 | 1987-02-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63127283U true JPS63127283U (en) | 1988-08-19 |
Family
ID=30815590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2025087U Pending JPS63127283U (en) | 1987-02-13 | 1987-02-13 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63127283U (en) |
-
1987
- 1987-02-13 JP JP2025087U patent/JPS63127283U/ja active Pending
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