JPS6168686U - - Google Patents
Info
- Publication number
- JPS6168686U JPS6168686U JP15401084U JP15401084U JPS6168686U JP S6168686 U JPS6168686 U JP S6168686U JP 15401084 U JP15401084 U JP 15401084U JP 15401084 U JP15401084 U JP 15401084U JP S6168686 U JPS6168686 U JP S6168686U
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- voltage
- circuit
- output
- supply device
- 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.)
- Granted
Links
- 239000004065 semiconductor Substances 0.000 claims description 3
- 239000003990 capacitor Substances 0.000 claims description 2
- 238000001514 detection method Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Dc-Dc Converters (AREA)
- Protection Of Static Devices (AREA)
Description
第１図は本考案による電源装置の保護回路の一
実施例を示す電気回路図、第２図は従来の回路の
場合の特性図、第３図は本考案による場合の特性
図である。
７…電源装置、８…変圧器、９…半導体開閉素
子（MOSFET等）、１２…過電流検出用抵抗、１５
，１６…出力端子、１８…電源ＩＣ、１９…パル
ストランス、２０，２１…分圧抵抗、２２…比較
検出器、２３…比較器、２９…コンデンサ、３０
…整流器、３１…抵抗。
FIG. 1 is an electric circuit diagram showing an embodiment of a protection circuit for a power supply device according to the present invention, FIG. 2 is a characteristic diagram of a conventional circuit, and FIG. 3 is a characteristic diagram of a case according to the present invention. 7... Power supply device, 8... Transformer, 9... Semiconductor switching element (MOSFET, etc.), 12... Resistor for overcurrent detection, 15
, 16... Output terminal, 18... Power supply IC, 19... Pulse transformer, 20, 21... Voltage dividing resistor, 22... Comparison detector, 23... Comparator, 29... Capacitor, 30
... Rectifier, 31... Resistor.
Claims (1)
比較してその比較出力で半導体開閉素子をスイツ
チングして一定電圧に制御するようにしたスイツ
チング電源装置であつて、出力電流に相当する電
圧を検出回路で検出し、また、出力電圧を分圧回
路で分圧し、これらの電圧を電源ＩＣ内の比較検
出器で比較してその出力で過電流保護をするよう
にした電源装置において、前記分圧回路と一方の
出力端子との間に、コンデンサと、整流器と抵抗
の並列回路とを直列に結合した回路を挿入してな
ることを特徴とする電源装置の保護回路。 (2) 半導体開閉素子はMOSFETからなる実用新案
登録請求の範囲第１項記載の電源装置の保護回路
。 (3) 電源ＩＣはＭＢ３７５９型ＩＣからなる実
用新案登録請求の範囲第１項または第２項記載の
電源装置の保護回路。[Claims for Utility Model Registration] (1) A switching power supply device that uses a power IC to compare a reference voltage and an output voltage, and uses the comparison output to switch a semiconductor switching element to control the voltage to a constant voltage. Then, the voltage corresponding to the output current is detected by the detection circuit, the output voltage is divided by the voltage divider circuit, these voltages are compared by the comparison detector in the power supply IC, and the output is used to provide overcurrent protection. In the power supply device, a circuit in which a capacitor, a parallel circuit of a rectifier and a resistor are connected in series is inserted between the voltage dividing circuit and one output terminal. protection circuit. (2) The protection circuit for a power supply device according to claim 1, wherein the semiconductor switching element is a MOSFET. (3) A protection circuit for a power supply device according to claim 1 or 2, wherein the power supply IC is an MB3759 type IC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1984154010U JPH0424788Y2 (en) | 1984-10-12 | 1984-10-12 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1984154010U JPH0424788Y2 (en) | 1984-10-12 | 1984-10-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6168686U true JPS6168686U (en) | 1986-05-10 |
| JPH0424788Y2 JPH0424788Y2 (en) | 1992-06-11 |
Family
ID=30712004
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1984154010U Expired JPH0424788Y2 (en) | 1984-10-12 | 1984-10-12 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0424788Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56156384U (en) * | 1980-04-18 | 1981-11-21 |
-
1984
- 1984-10-12 JP JP1984154010U patent/JPH0424788Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56156384U (en) * | 1980-04-18 | 1981-11-21 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0424788Y2 (en) | 1992-06-11 |
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