JPH01127331U - - Google Patents
Info
- Publication number
- JPH01127331U JPH01127331U JP2203988U JP2203988U JPH01127331U JP H01127331 U JPH01127331 U JP H01127331U JP 2203988 U JP2203988 U JP 2203988U JP 2203988 U JP2203988 U JP 2203988U JP H01127331 U JPH01127331 U JP H01127331U
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- ambient temperature
- value
- supply device
- resistor
- 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
- 230000007423 decrease Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
- 238000004804 winding Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 1
Landscapes
- Emergency Protection Circuit Devices (AREA)
- Protection Of Static Devices (AREA)
- Dc-Dc Converters (AREA)
Description
第１図は本考案に係る電源装置の一実施例を示
す電気回路図、第２図はそのＶ―Ｉ特性図、第３
図は従来の電源装置のＶ―Ｉ特性図および第４図
は従来の電源装置の周囲温度の変化に対するデイ
レーテイング状態を示す説明図である。
１……スイツチングトランジスタ（制御素子）
、２……制御回路、３……検出回路、４……制御
トランジスタ、ｎ１……一次巻線（入力電源側）
、ｎ２……二次巻線（出力側）、ｎ０……制御巻
線、Ｒ３……抵抗（正特性サーミスタ）、Ｒ５…
…抵抗（負特性サーミスタ）。
FIG. 1 is an electric circuit diagram showing an embodiment of the power supply device according to the present invention, FIG. 2 is its VI characteristic diagram, and FIG.
FIG. 4 is a VI characteristic diagram of a conventional power supply device, and FIG. 4 is an explanatory diagram showing a derating state of the conventional power supply device with respect to changes in ambient temperature. 1...Switching transistor (control element)
, 2...Control circuit, 3...Detection circuit, 4...Control transistor, n1 ...Primary winding (input power supply side)
, n 2 ... Secondary winding (output side), n 0 ... Control winding, R 3 ... Resistor (positive characteristic thermistor), R 5 ...
...Resistance (negative characteristic thermistor).
Claims (1)
側に所定の出力電圧を得るとともに、出力側の過
負荷状態を抵抗を介して検出し、該検出値が所定
値に達したとき前記制御素子を保護する過電流保
護回路付き電源装置において、 前記抵抗の抵抗値は周囲温度が高いときは前記
所定値を小さく、低いときには大きくするように
変化させるサーミスタからなることを特徴とする
過電流保護回路付き電源装置。[Claims for Utility Model Registration] A predetermined output voltage is obtained on the output side by a control element inserted in the input power supply side, and an overload condition on the output side is detected via a resistor, and the detected value is set to a predetermined value. In the power supply device with an overcurrent protection circuit that protects the control element when an ambient temperature reaches a certain value, the resistance value of the resistor is comprised of a thermistor that changes the predetermined value so that it decreases when the ambient temperature is high and increases when the ambient temperature is low. A power supply device with an overcurrent protection circuit featuring:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2203988U JPH01127331U (en) | 1988-02-22 | 1988-02-22 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2203988U JPH01127331U (en) | 1988-02-22 | 1988-02-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01127331U true JPH01127331U (en) | 1989-08-31 |
Family
ID=31239799
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2203988U Pending JPH01127331U (en) | 1988-02-22 | 1988-02-22 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01127331U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010144077A1 (en) * | 2009-06-08 | 2010-12-16 | Hewlett-Packard Development Company, L.P. | Decreasing voltage detection with control signaling |
-
1988
- 1988-02-22 JP JP2203988U patent/JPH01127331U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010144077A1 (en) * | 2009-06-08 | 2010-12-16 | Hewlett-Packard Development Company, L.P. | Decreasing voltage detection with control signaling |
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