JPH0350979U - - Google Patents
Info
- Publication number
- JPH0350979U JPH0350979U JP11096789U JP11096789U JPH0350979U JP H0350979 U JPH0350979 U JP H0350979U JP 11096789 U JP11096789 U JP 11096789U JP 11096789 U JP11096789 U JP 11096789U JP H0350979 U JPH0350979 U JP H0350979U
- Authority
- JP
- Japan
- Prior art keywords
- ocp
- control
- light receiving
- receiving element
- light
- 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
- 239000003990 capacitor Substances 0.000 claims description 3
- 239000013256 coordination polymer Substances 0.000 claims description 2
- 238000001514 detection method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Dc-Dc Converters (AREA)
Description
第１図は本考案の一実施例を示す回路図、第２
図は従来例を示す回路図である。
２……スイツチングトランジスタ（スイツチン
グ素子）、５……コントロールＩＣ、１３……Ｏ
ＣＰ用発光ダイオード（ＯＣＰ用発光素子）、１
５……抵抗、１６……コンデンサ、１９……ＯＣ
Ｐ用フオトトランジスタ（ＯＣＰ用受光素子）。
Figure 1 is a circuit diagram showing one embodiment of the present invention, Figure 2 is a circuit diagram showing an embodiment of the present invention.
The figure is a circuit diagram showing a conventional example. 2...Switching transistor (switching element), 5...Control IC, 13...O
Light emitting diode for CP (light emitting element for OCP), 1
5...Resistor, 16...Capacitor, 19...OC
Phototransistor for P (light receiving element for OCP).
Claims (1)
スイツチング素子を制御するコントロールＩＣを
用い、このコントロールＩＣはスイツチング素子
の動作を停止させるための遮断用端子を有するス
イツチング電源装置において、前記直流出力電圧
の出力端子側に、直流出力電圧が所定電圧より低
下したとき発光を停止するＯＣＰ用発光素子を接
続し、前記コントロールＩＣの遮断用端子側にＯ
ＣＰ用受光素子を接続し、このＯＣＰ用受光素子
に、この受光素子がオフしたとき時定数に基づい
てコンデンサに充電するＣＲ時定数回路を接続し
、前記コンデンサの充電電圧を前記遮断用端子に
供給することを特徴とするスイツチング電源装置
の過負荷・短絡検出回路。 In the feedback circuit to stabilize the DC output voltage,
In a switching power supply device, a control IC for controlling a switching element is used, and this control IC has a cutoff terminal for stopping the operation of the switching element. Connect an OCP light emitting element that stops emitting light when the temperature drops, and connect an OCP light emitting element to the cutoff terminal side of the control IC.
A CP light receiving element is connected, a CR time constant circuit that charges a capacitor based on a time constant when this light receiving element is turned off is connected to this OCP light receiving element, and the charging voltage of the capacitor is applied to the cutoff terminal. An overload/short circuit detection circuit for a switching power supply device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11096789U JPH0350979U (en) | 1989-09-22 | 1989-09-22 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11096789U JPH0350979U (en) | 1989-09-22 | 1989-09-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0350979U true JPH0350979U (en) | 1991-05-17 |
Family
ID=31659469
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11096789U Pending JPH0350979U (en) | 1989-09-22 | 1989-09-22 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0350979U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS576916A (en) * | 1980-06-16 | 1982-01-13 | Toshiba Electric Equip Corp | Power supply device |
| JPS63140663A (en) * | 1986-12-03 | 1988-06-13 | Fuji Electric Co Ltd | Detector for short-circuiting of switching power supply load |
-
1989
- 1989-09-22 JP JP11096789U patent/JPH0350979U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS576916A (en) * | 1980-06-16 | 1982-01-13 | Toshiba Electric Equip Corp | Power supply device |
| JPS63140663A (en) * | 1986-12-03 | 1988-06-13 | Fuji Electric Co Ltd | Detector for short-circuiting of switching power supply load |
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