JPS59155884U - Protection circuit for switching control type power supply equipment - Google Patents

Protection circuit for switching control type power supply equipment

Info

Publication number
JPS59155884U
JPS59155884U JP5103883U JP5103883U JPS59155884U JP S59155884 U JPS59155884 U JP S59155884U JP 5103883 U JP5103883 U JP 5103883U JP 5103883 U JP5103883 U JP 5103883U JP S59155884 U JPS59155884 U JP S59155884U
Authority
JP
Japan
Prior art keywords
transistor
input
voltage
power supply
control
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
Application number
JP5103883U
Other languages
Japanese (ja)
Other versions
JPH0445434Y2 (en
Inventor
勝美 田中
Original Assignee
三洋電機株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 三洋電機株式会社 filed Critical 三洋電機株式会社
Priority to JP5103883U priority Critical patent/JPS59155884U/en
Publication of JPS59155884U publication Critical patent/JPS59155884U/en
Application granted granted Critical
Publication of JPH0445434Y2 publication Critical patent/JPH0445434Y2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Protection Of Static Devices (AREA)
  • 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

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案を使用したスイッチング制御型電源装置
の一実施例を示し、第２図はその動作説明のための出力
電流対出力電圧特性図である。 １・・・入力整流部、２・・・ブロッキング発振部、３
・・・制御回路部、４・・・保護回路部、５・・・出力
整流部、ＴＲ４・・・制御トランジスタ、ＴＲ６・・・
保護用トランジスタ。FIG. 1 shows an embodiment of a switching control type power supply device using the present invention, and FIG. 2 is an output current versus output voltage characteristic diagram for explaining its operation. 1... Input rectifier section, 2... Blocking oscillation section, 3
...Control circuit section, 4...Protection circuit section, 5...Output rectification section, TR4...Control transistor, TR6...
Protection transistor.

Claims (2)

【実用新案登録請求の範囲】[Scope of utility model registration request] （１）スイッチングトランジスタのコレクタ・エミッタ
間を直流入力に対してコンバータトランスの入力線と直
列に接続し、”このトランスの帰還巻線に発生する電圧
を前記トランジスタのベースに正帰還させてブロッキン
グ発振を行なわせると共に、制御トランジスタによって
前記コンバータトランスの検出巻線から得る直流電圧に
応じて前記スイッチングトランジスタのターンオフタイ
ミングを制御するようにした電源装置に於いて、前記検
出巻線から得る直流電圧が所定値以下に低下したとき及
び直流入力電圧が所定値以下に低下したときに反転する
保護用のトランジスタを設け、このトランジスタが反転
したときに直流入力の入力端から前記制御トランジスタ
の制御電極への電流路が形成され、この電流路を通る電
流によって上記制御トランジスタが動作して前記スイッ
チングトランジスタがターンオフされるようにしてなる
スイッチング制御型電源装置の保護回路。(1) The collector and emitter of the switching transistor are connected in series with the input line of the converter transformer for DC input, and the voltage generated in the feedback winding of this transformer is positively fed back to the base of the transistor to generate blocking oscillation. In the power supply device, the control transistor controls the turn-off timing of the switching transistor according to the DC voltage obtained from the detection winding of the converter transformer, wherein the DC voltage obtained from the detection winding is set to a predetermined value. A protection transistor is provided that is inverted when the DC input voltage drops below a predetermined value or below a predetermined value, and when this transistor is inverted, current flows from the input terminal of the DC input to the control electrode of the control transistor. A protection circuit for a switching control type power supply device, wherein a current path is formed, and a current passing through the current path operates the control transistor to turn off the switching transistor. （２）前記電流路は直流入力の一方の入力端から分圧抵
抗を介して前記制御トランジスタの制御電極に接続され
、その分圧抵抗の上記制御電極側の一端と上記直流入力
の他端との間に前記保護用トランジスタのコレクタ・エ
ミッタ間を接続し、この保護用トランジスタのベースに
定電圧ダイオードを介して前記検出巻線から得る直流　
　　′電圧を印加すると共に、上記ベースと前記分圧抵
抗の分圧中点との間にコンデンサを接続してなる登録請
求の範囲第１項記載のスイッチング制御型電源装置の保
護回路。(2) The current path is connected from one input end of the DC input to the control electrode of the control transistor via a voltage dividing resistor, and one end of the voltage dividing resistor on the control electrode side and the other end of the DC input The collector and emitter of the protection transistor are connected between the terminals, and the direct current obtained from the detection winding is connected to the base of the protection transistor through a constant voltage diode.
2. The protection circuit for a switching control type power supply device according to claim 1, wherein a voltage is applied and a capacitor is connected between the base and the voltage dividing midpoint of the voltage dividing resistor.
JP5103883U 1983-04-05 1983-04-05 Protection circuit for switching control type power supply equipment Granted JPS59155884U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5103883U JPS59155884U (en) 1983-04-05 1983-04-05 Protection circuit for switching control type power supply equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5103883U JPS59155884U (en) 1983-04-05 1983-04-05 Protection circuit for switching control type power supply equipment

Publications (2)

Publication Number Publication Date
JPS59155884U true JPS59155884U (en) 1984-10-19
JPH0445434Y2 JPH0445434Y2 (en) 1992-10-26

Family

ID=30181467

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5103883U Granted JPS59155884U (en) 1983-04-05 1983-04-05 Protection circuit for switching control type power supply equipment

Country Status (1)

Country Link
JP (1) JPS59155884U (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5338006A (en) * 1976-09-21 1978-04-07 Sumitomo Electric Ind Ltd System for receiving signals from moving bodies
JPS55122477A (en) * 1979-03-15 1980-09-20 Nec Corp Dc-dc converter
JPS5731087U (en) * 1980-07-26 1982-02-18

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2218556B1 (en) * 1973-02-16 1977-12-30 Europe Mfg Trust

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5338006A (en) * 1976-09-21 1978-04-07 Sumitomo Electric Ind Ltd System for receiving signals from moving bodies
JPS55122477A (en) * 1979-03-15 1980-09-20 Nec Corp Dc-dc converter
JPS5731087U (en) * 1980-07-26 1982-02-18

Also Published As

Publication number Publication date
JPH0445434Y2 (en) 1992-10-26

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