JPS60141690U - Switching regulator starting circuit - Google Patents

Switching regulator starting circuit

Info

Publication number
JPS60141690U
JPS60141690U JP2770684U JP2770684U JPS60141690U JP S60141690 U JPS60141690 U JP S60141690U JP 2770684 U JP2770684 U JP 2770684U JP 2770684 U JP2770684 U JP 2770684U JP S60141690 U JPS60141690 U JP S60141690U
Authority
JP
Japan
Prior art keywords
switching regulator
transistor
starting
voltage
control circuit
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
JP2770684U
Other languages
Japanese (ja)
Other versions
JPH0229826Y2 (en
Inventor
武久 佐藤
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 JP2770684U priority Critical patent/JPS60141690U/en
Publication of JPS60141690U publication Critical patent/JPS60141690U/en
Application granted granted Critical
Publication of JPH0229826Y2 publication Critical patent/JPH0229826Y2/ja
Granted legal-status Critical Current

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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 drawings]

第１図乃至第４図は従来のスイッチングレギュレータの
起動回路を説明する回路図、第５図は本考案によるスイ
ッチングレギュレータの起動回路　　°　、を説明する
回路図である。 主な図番の説明、２１は整流平滑回路、２２は制御回路
、２３はスイッチングトランジスタ、２４はトランス、
２５．２６は分圧抵抗、２７，２内はツエーナーダイオ
ード、２９は起動トランジスタである。1 to 4 are circuit diagrams illustrating a conventional switching regulator starting circuit, and FIG. 5 is a circuit diagram illustrating a switching regulator starting circuit according to the present invention. Explanation of main drawing numbers: 21 is a rectifier and smoothing circuit, 22 is a control circuit, 23 is a switching transistor, 24 is a transformer,
25 and 26 are voltage dividing resistors, 27 and 2 are Zener diodes, and 29 is a starting transistor.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 交流電源に接続された整流平滑回路とトランスとスイッ
チングトランジスタと制御回路とを備え該制御回路から
出力される高周波制御パルスを前記スイッチングトラン
ジスタに印加してスイッチ、　　　ングさせ前記トラン
スの２次側に安定化電圧を得るスイッチングレギュレー
タに於いて、前記整流平滑回路の出力電圧を分圧する分
圧抵抗と該分圧抵抗の分圧点から接地間に直列に接続し
た少くとも２個のツェナーダイオードと該ツェナーダイ
オードの接続点にベースを接続した起動トランジスタと
を具備し、電源投入時に前記起動トランジスタを導通さ
せて前記制御回路に電流を供給し、前記トランスの補助
巻線から得られる整流電圧力持、　　ち上がると前記起
動トランジスタを遮断させ前記整流電圧により前記起動
トランジスタを遮断させ前記整流電圧により前記制御回
路を動作させることを特徴とするスイッチングレギュレ
ータの起動回路。A rectifying and smoothing circuit connected to an AC power supply, a transformer, a switching transistor, and a control circuit are provided, and a high frequency control pulse output from the control circuit is applied to the switching transistor to switch and stabilize the secondary side of the transformer. In the switching regulator that obtains the output voltage of the rectifying and smoothing circuit, the switching regulator includes a voltage dividing resistor that divides the output voltage of the rectifying and smoothing circuit, at least two Zener diodes connected in series between a voltage dividing point of the voltage dividing resistor and ground, and the Zener. and a starting transistor whose base is connected to the connection point of the diode, and when the power is turned on, the starting transistor is made conductive to supply current to the control circuit, and the rectified voltage obtained from the auxiliary winding of the transformer is increased. A starting circuit for a switching regulator, characterized in that the starting transistor is cut off, the starting transistor is cut off by the rectified voltage, and the control circuit is operated by the rectified voltage.
JP2770684U 1984-02-27 1984-02-27 Switching regulator starting circuit Granted JPS60141690U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2770684U JPS60141690U (en) 1984-02-27 1984-02-27 Switching regulator starting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2770684U JPS60141690U (en) 1984-02-27 1984-02-27 Switching regulator starting circuit

Publications (2)

Publication Number Publication Date
JPS60141690U true JPS60141690U (en) 1985-09-19
JPH0229826Y2 JPH0229826Y2 (en) 1990-08-10

Family

ID=30524906

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2770684U Granted JPS60141690U (en) 1984-02-27 1984-02-27 Switching regulator starting circuit

Country Status (1)

Country Link
JP (1) JPS60141690U (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01318553A (en) * 1988-06-17 1989-12-25 Murata Mfg Co Ltd Switching power circuit
JPH0260464A (en) * 1988-08-26 1990-02-28 Nec Corp Starting circuit of switching power supply
JPH0297889U (en) * 1989-01-19 1990-08-03
JP2007020392A (en) * 2005-07-07 2007-01-25 Power Integrations Inc Method and device for conditional response with respect to fault condition in switching power supply

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01318553A (en) * 1988-06-17 1989-12-25 Murata Mfg Co Ltd Switching power circuit
JPH0260464A (en) * 1988-08-26 1990-02-28 Nec Corp Starting circuit of switching power supply
JPH0297889U (en) * 1989-01-19 1990-08-03
JP2007020392A (en) * 2005-07-07 2007-01-25 Power Integrations Inc Method and device for conditional response with respect to fault condition in switching power supply
JP2012044865A (en) * 2005-07-07 2012-03-01 Power Integrations Inc Method and device for conditional response to failure condition in switching power supply

Also Published As

Publication number Publication date
JPH0229826Y2 (en) 1990-08-10

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