JPS58683U - DC-DC converter protection circuit - Google Patents
DC-DC converter protection circuitInfo
- Publication number
- JPS58683U JPS58683U JP9534081U JP9534081U JPS58683U JP S58683 U JPS58683 U JP S58683U JP 9534081 U JP9534081 U JP 9534081U JP 9534081 U JP9534081 U JP 9534081U JP S58683 U JPS58683 U JP S58683U
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- protection circuit
- comparator
- input
- switching element
- 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
Landscapes
- Dc-Dc Converters (AREA)
- Power Conversion In General (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は従来のコンバータにより１２Ｖの車載用機器を
駆動する回路のブロック図、第２図は上記コンバニタの
詳細回路図、第３図は本考案の一実施例によるＤＣ−Ｄ
Ｃコンバータの保護回路の回路図である。
４・・・車載用機器（負荷）、６・・・スイッチングレ
ギレータ、２ａ、 ７ｂ、 ７ｃ・・・トランジス
タ（スイッチング素子）、１０・・・平滑回路の一部で
あるチョークトランス、１１・・・比較器、１３・・・
過負荷検出用抵抗、１４・・・過負荷検出用フォトカブ
ラ、１７・・・サイリスタ。 、。
−一′Figure 1 is a block diagram of a circuit that drives 12V in-vehicle equipment using a conventional converter, Figure 2 is a detailed circuit diagram of the converter, and Figure 3 is a DC-D converter according to an embodiment of the present invention.
FIG. 2 is a circuit diagram of a protection circuit for a C converter. 4... Vehicle equipment (load), 6... Switching regulator, 2a, 7b, 7c... Transistor (switching element), 10... Choke transformer which is part of the smoothing circuit, 11...・Comparator, 13...
Resistor for overload detection, 14... Photocoupler for overload detection, 17... Thyristor. ,. −1′
Claims (1)
所望デユーティ比のパルス電圧に変えるスイッチング素
子と、上記パルス電圧を平滑し所望の直流電圧出力を作
成する平滑回路と、上記直流電圧出力と基準電圧とを比
較して上記スイッチング素子のスイッチング周期を制御
する比較器とを備えたＤＣ−ＤＣコンバータの保護回路
であって、上記ＤＣ−ＤＣコンバータの出力端子に接続
された過負荷検出用抵抗と、該過負荷検出用抵抗ととも
に過負荷状態を検出する過負荷検出用？オドカプラと、
該過負荷検出用フォトカプラの検出出力によりオンされ
上記入力直流電圧を上記比較器の入力に印加し該比較器
をして上記スイッチング素子を定常的にオフせしめるサ
イリスタとを備えたことを特徴とするＤＣ−ＤＣコンバ
ータの保護回路。A switching element that repeats a switching operation at a predetermined period to convert an input DC voltage into a pulse voltage with a desired duty ratio, a smoothing circuit that smoothes the pulse voltage to create a desired DC voltage output, and a DC voltage output and a reference voltage. A protection circuit for a DC-DC converter, comprising: a comparator that controls the switching period of the switching element by comparing the For overload detection that detects overload status along with overload detection resistor? Odocoupler and
and a thyristor that is turned on by the detection output of the overload detection photocoupler, applies the input DC voltage to the input of the comparator, and causes the comparator to constantly turn off the switching element. Protection circuit for DC-DC converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9534081U JPS58683U (en) | 1981-06-26 | 1981-06-26 | DC-DC converter protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9534081U JPS58683U (en) | 1981-06-26 | 1981-06-26 | DC-DC converter protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58683U true JPS58683U (en) | 1983-01-05 |
Family
ID=29890249
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9534081U Pending JPS58683U (en) | 1981-06-26 | 1981-06-26 | DC-DC converter protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58683U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60245467A (en) * | 1984-05-21 | 1985-12-05 | Matsushita Electric Ind Co Ltd | Switching power source |
| JPH0484347U (en) * | 1990-11-29 | 1992-07-22 | ||
| JP2015003644A (en) * | 2013-06-21 | 2015-01-08 | いすゞ自動車株式会社 | Dual power supply unit for automobile |
-
1981
- 1981-06-26 JP JP9534081U patent/JPS58683U/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60245467A (en) * | 1984-05-21 | 1985-12-05 | Matsushita Electric Ind Co Ltd | Switching power source |
| JPH0484347U (en) * | 1990-11-29 | 1992-07-22 | ||
| JP2015003644A (en) * | 2013-06-21 | 2015-01-08 | いすゞ自動車株式会社 | Dual power supply unit for automobile |
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