JPH0444720U - - Google Patents

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Publication number
JPH0444720U
JPH0444720U JP8761190U JP8761190U JPH0444720U JP H0444720 U JPH0444720 U JP H0444720U JP 8761190 U JP8761190 U JP 8761190U JP 8761190 U JP8761190 U JP 8761190U JP H0444720 U JPH0444720 U JP H0444720U
Authority
JP
Japan
Prior art keywords
circuit
protection circuit
output terminal
short
power
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
JP8761190U
Other languages
Japanese (ja)
Other versions
JP2542934Y2 (en
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 filed Critical
Priority to JP1990087611U priority Critical patent/JP2542934Y2/en
Publication of JPH0444720U publication Critical patent/JPH0444720U/ja
Application granted granted Critical
Publication of JP2542934Y2 publication Critical patent/JP2542934Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Amplifiers (AREA)

Description

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

第１図はこの考案にかかる保護回路の一実施例
を示す要部の回路図、第２図はこの考案の保護回
路の他の実施例の回路図、第３図は従来の保護回
路の一具体例を示すブロツク図を含む回路図であ
る。 Ｖｃｃ……電源端子、Ｖ０，Ｖ０１，Ｖ０２，
Ｖ０３……出力端子、Ｖｃｃ２……第２電源ライ
ン、Ｑ０１，Ｑ０２……パワートランジスタ、Ｑ
Ｄ１……ドライバトランジスタ、Ｓ１……スタン
バイ回路、Ｓ２……過電流検出回路、Ｓ３……オ
フドライバ、Ｓ４……天絡検知回路。 Fig. 1 is a circuit diagram of the main parts of one embodiment of the protection circuit according to this invention, Fig. 2 is a circuit diagram of another embodiment of the protection circuit of this invention, and Fig. 3 is a circuit diagram of a conventional protection circuit. FIG. 2 is a circuit diagram including a block diagram showing a specific example. V cc ... Power supply terminal, V 0 , V 01 , V 02 ,
V 03 ... Output terminal, V cc2 ... Second power supply line, Q 01 , Q 02 ... Power transistor, Q
D1 ...driver transistor, S1 ...standby circuit, S2 ...overcurrent detection circuit, S3 ...off driver, S4 ...power supply detection circuit.

Claims (1)

【実用新案登録請求の範囲】 １ スタンバイ回路を有する出力回路で、パワー
トランジスタの動作を開閉するオフドライバの動
作電源を、出力端子から得る構成にしたことを特
徴とする保護回路。 ２ 前記請求の範囲１で述べた保護回路は、スタ
ンバイ状態で天絡により出力端子に電圧が印加さ
れたことを検知する天絡検知回路を有する保護回
路。[Claims for Utility Model Registration] 1. A protection circuit, which is an output circuit having a standby circuit, and is characterized in that an operating power source for an off-driver that opens and closes the operation of a power transistor is obtained from an output terminal. 2. The protection circuit described in claim 1 is a protection circuit having a short-to-power detection circuit that detects that a voltage is applied to the output terminal due to a short-to-power supply in a standby state.
JP1990087611U 1990-08-21 1990-08-21 Protection circuit Expired - Lifetime JP2542934Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1990087611U JP2542934Y2 (en) 1990-08-21 1990-08-21 Protection circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1990087611U JP2542934Y2 (en) 1990-08-21 1990-08-21 Protection circuit

Publications (2)

Publication Number Publication Date
JPH0444720U true JPH0444720U (en) 1992-04-16
JP2542934Y2 JP2542934Y2 (en) 1997-07-30

Family

ID=31820100

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1990087611U Expired - Lifetime JP2542934Y2 (en) 1990-08-21 1990-08-21 Protection circuit

Country Status (1)

Country Link
JP (1) JP2542934Y2 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6265505A (en) * 1985-09-17 1987-03-24 Sanyo Electric Co Ltd Power transistor protection circuit
JPS63211905A (en) * 1987-02-27 1988-09-05 Toshiba Corp Audio output amplifier

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6265505A (en) * 1985-09-17 1987-03-24 Sanyo Electric Co Ltd Power transistor protection circuit
JPS63211905A (en) * 1987-02-27 1988-09-05 Toshiba Corp Audio output amplifier

Also Published As

Publication number Publication date
JP2542934Y2 (en) 1997-07-30

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