JPH01105377U - - Google Patents
Info
- Publication number
- JPH01105377U JPH01105377U JP20016687U JP20016687U JPH01105377U JP H01105377 U JPH01105377 U JP H01105377U JP 20016687 U JP20016687 U JP 20016687U JP 20016687 U JP20016687 U JP 20016687U JP H01105377 U JPH01105377 U JP H01105377U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- trigger
- switching transistor
- voltage
- switching
- 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
- 238000009499 grossing Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 4
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
タ回路の一実施例を示す接続図、第２図は従来回
路の接続図、第３図及び第４図はそれぞれ従来回
路の欠点の説明に供する入出力特性図である。
１……商用電源、２……整流回路、４……スイ
ツチングトランジスタ、５……平滑用コイル、９
……フライバツクトランス、１０……ダイオード
、１１……デユーテイ比コントロール回路、１５
……電流リミツト回路。
Fig. 1 is a connection diagram showing an embodiment of the switching regulator circuit according to the present invention, Fig. 2 is a connection diagram of a conventional circuit, and Figs. 3 and 4 are input diagrams for explaining the drawbacks of the conventional circuit. It is an output characteristic diagram. 1... Commercial power supply, 2... Rectifier circuit, 4... Switching transistor, 5... Smoothing coil, 9
... Flyback transformer, 10 ... Diode, 11 ... Duty ratio control circuit, 15
...Current limit circuit.
Claims (1)
換された入力電圧が与えられるスイツチングトラ
ンジスタと、このスイツチングトランジスタから
のパルス電圧を平滑して出力する平滑回路と、上
記スイツチングトランジスタにオン動作指令用の
トリガ電流を供給する他励トリガ回路と、上記平
滑回路からの出力電圧に基づいて上記スイツチン
グトランジスタのオン動作時間を制御するデユー
テイ比コントロール回路とを備えたスイツチング
レギユレータ回路において、 上記他励トリガ回路からのトリガ電流を、当該
トリガ電流が上記出力電圧の大きさに応じて小さ
くなつた場合にも上記スイツチングトランジスタ
を十分にドライブできる大きさに選定すると共に
、 上記他励トリガ回路からのトリガ電流を所定値
以下に制限する電流リミツト回路を設けたことを
特徴とするスイツチングレギユレータ回路。[Claims for Utility Model Registration] A switching transistor to which an input voltage obtained by converting an AC power supply voltage to a DC voltage via a rectifier circuit is provided, and a smoothing circuit that smoothes and outputs the pulse voltage from the switching transistor. , a separately excited trigger circuit that supplies a trigger current for an on-operation command to the switching transistor, and a duty ratio control circuit that controls the on-operation time of the switching transistor based on the output voltage from the smoothing circuit. In the switching regulator circuit, the trigger current from the separately excited trigger circuit has a size that can sufficiently drive the switching transistor even when the trigger current becomes smaller in accordance with the magnitude of the output voltage. A switching regulator circuit characterized in that the switching regulator circuit is selected as follows, and further includes a current limit circuit that limits the trigger current from the externally excited trigger circuit to a predetermined value or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20016687U JPH01105377U (en) | 1987-12-30 | 1987-12-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20016687U JPH01105377U (en) | 1987-12-30 | 1987-12-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01105377U true JPH01105377U (en) | 1989-07-17 |
Family
ID=31490590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20016687U Pending JPH01105377U (en) | 1987-12-30 | 1987-12-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01105377U (en) |
-
1987
- 1987-12-30 JP JP20016687U patent/JPH01105377U/ja active Pending
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