JPH0350933U - - Google Patents
Info
- Publication number
- JPH0350933U JPH0350933U JP11125189U JP11125189U JPH0350933U JP H0350933 U JPH0350933 U JP H0350933U JP 11125189 U JP11125189 U JP 11125189U JP 11125189 U JP11125189 U JP 11125189U JP H0350933 U JPH0350933 U JP H0350933U
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- output
- supply device
- pulse signal
- power supply
- 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 4
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Protection Of Static Devices (AREA)
Description
第１図は本考案の一実施例の電気回路図、第２
図は第１図の出力電流と出力電圧の特性図、第３
図は従来装置の電気回路図である。
Ｔ……出力トランス、ＬＰ……１次巻線、ＬＳ
……２次巻線、Ｑ……スイツチングトランジスタ
（スイツチング素子）、ＩＣ……制御用集積回路
（制御部）、ＮＶ……負電圧発生回路。
Fig. 1 is an electrical circuit diagram of one embodiment of the present invention;
The figure shows the characteristics diagram of output current and output voltage in Figure 1, and Figure 3.
The figure is an electrical circuit diagram of a conventional device. T...Output transformer, LP...Primary winding, LS
...Secondary winding, Q...Switching transistor (switching element), IC...Control integrated circuit (control unit), NV...Negative voltage generation circuit.
Claims (1)
したパルス信号を制御部から出力してスイツチン
グ素子をスイツチング制御し、このスイツチング
素子により前記出力トランスの１次巻線への入力
をオン・オフ制御することにより、前記出力電圧
を一定に制御し、一方、出力電流をこれに比例し
た正の電圧に変換して前記制御部に印加し、この
正の電圧が、出力端の短絡発生等に起因した過大
電流によつて一定レベル以上となつた時に、前記
制御部が出力電圧を低下させるようなパルス信号
を出力するようになつたフオワード方式のスイツ
チング電源装置において、前記出力電圧に比例し
た負の電圧を発生する負電圧発生回路を設けると
ともに、この負の電圧を前記正の電圧に合算して
前記制御部に印加するようにしたことを特徴とす
るスイツチング電源装置。 A pulse signal corresponding to the output voltage from the secondary winding of the output transformer is output from the control unit to control the switching element, and this switching element controls on/off the input to the primary winding of the output transformer. By controlling the output voltage to be constant, on the other hand, the output current is converted into a positive voltage proportional to this and applied to the control section, and this positive voltage is In a forward type switching power supply device, the control unit outputs a pulse signal that reduces the output voltage when the current exceeds a certain level due to excessive current. 1. A switching power supply device comprising: a negative voltage generating circuit that generates a voltage; and the negative voltage is added to the positive voltage and applied to the control section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11125189U JPH0350933U (en) | 1989-09-22 | 1989-09-22 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11125189U JPH0350933U (en) | 1989-09-22 | 1989-09-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0350933U true JPH0350933U (en) | 1991-05-17 |
Family
ID=31659739
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11125189U Pending JPH0350933U (en) | 1989-09-22 | 1989-09-22 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0350933U (en) |
-
1989
- 1989-09-22 JP JP11125189U patent/JPH0350933U/ja active Pending
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