JP2005157604A - 過電流保護回路 - Google Patents
過電流保護回路 Download PDFInfo
- Publication number
- JP2005157604A JP2005157604A JP2003393341A JP2003393341A JP2005157604A JP 2005157604 A JP2005157604 A JP 2005157604A JP 2003393341 A JP2003393341 A JP 2003393341A JP 2003393341 A JP2003393341 A JP 2003393341A JP 2005157604 A JP2005157604 A JP 2005157604A
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- Japan
- Prior art keywords
- output
- voltage
- current
- protection circuit
- 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.)
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Classifications
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
- G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
- G05F1/565—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor
- G05F1/569—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor for protection
- G05F1/573—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor for protection with overcurrent detector
- G05F1/5735—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor for protection with overcurrent detector with foldback current limiting
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Continuous-Control Power Sources That Use Transistors (AREA)
Abstract
【解決手段】 過電流検出時において、負電圧発生回路を動作させることにより、デプレション型出力トランジスタで構成しているボルテージレギュレータの出力電流−出力電圧特性をフの字型に制御するようにした。
【選択図】 図1
Description
2:増幅回路
3:帰還抵抗
4:デプレション型出力トランジスタ
5:出力電圧分圧抵抗
6,7:ロジック生成回路
8:フの字型過電流保護回路
9:負電圧発生回路
10:AND回路
11:検出信号
12:過電流遅延信号
13:抵抗分圧出力
14:電圧検出信号
15:電源端子
16:出力端子
Claims (1)
- デプレション型の出力トランジスタで構成しているボルテージレギュレータにおいて、出力トランジスタに流れる過電流を検出した信号と過電流検出後の出力電圧低下の信号を入力としたロジック回路により、負電圧発生回路を動作させ、出力電圧の降下に伴い出力電流が徐々に小さくなるフの字型をした出力電流−出力電圧特性を特徴とする過電流保護回路。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003393341A JP4319012B2 (ja) | 2003-11-25 | 2003-11-25 | 過電流保護回路及びボルテージレギュレータ |
US10/996,746 US7289308B2 (en) | 2003-11-25 | 2004-11-24 | Overcurrent protection circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003393341A JP4319012B2 (ja) | 2003-11-25 | 2003-11-25 | 過電流保護回路及びボルテージレギュレータ |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2005157604A true JP2005157604A (ja) | 2005-06-16 |
JP4319012B2 JP4319012B2 (ja) | 2009-08-26 |
Family
ID=34719724
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2003393341A Expired - Fee Related JP4319012B2 (ja) | 2003-11-25 | 2003-11-25 | 過電流保護回路及びボルテージレギュレータ |
Country Status (2)
Country | Link |
---|---|
US (1) | US7289308B2 (ja) |
JP (1) | JP4319012B2 (ja) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008192083A (ja) * | 2007-02-07 | 2008-08-21 | Nippon Telegr & Teleph Corp <Ntt> | 低飽和レギュレータ回路 |
JP2012003678A (ja) * | 2010-06-21 | 2012-01-05 | Renesas Electronics Corp | レギュレータ回路 |
CN110308756A (zh) * | 2018-03-27 | 2019-10-08 | 艾普凌科有限公司 | 电压调节器 |
JP2020135372A (ja) * | 2019-02-19 | 2020-08-31 | ローム株式会社 | 電源回路 |
WO2020203439A1 (ja) * | 2019-03-29 | 2020-10-08 | いすゞ自動車株式会社 | 輸送管理装置、輸送管理方法、および、輸送システム |
CN114020086A (zh) * | 2021-11-11 | 2022-02-08 | 无锡迈尔斯通集成电路有限公司 | 一种随输入电压线性变化的ldo限流电路 |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7538528B2 (en) * | 2006-09-13 | 2009-05-26 | Linear Technology Corporation | Constant power foldback mechanism programmable to approximate safe operating area of pass device for providing connection to load |
US8072721B2 (en) * | 2009-06-10 | 2011-12-06 | Hong Kong Applied Science And Technology Research Institute Co., Ltd. | ESD protection using a capacitivly-coupled clamp for protecting low-voltage core transistors from high-voltage outputs |
US9310819B2 (en) * | 2012-09-07 | 2016-04-12 | Infineon Technologies Americas Corp. | Power converter including integrated driver providing overcurrent protection |
US9590524B1 (en) * | 2016-01-15 | 2017-03-07 | Raytheon Company | Apparatus and method for a power converter and system having foldback current limit |
TWI571025B (zh) * | 2016-01-21 | 2017-02-11 | 旺玖科技股份有限公司 | 負電壓保護系統 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06209584A (ja) * | 1993-01-08 | 1994-07-26 | Fuji Electric Co Ltd | 瞬時値制御パルス幅変調インバータの制御回路 |
US5666044A (en) * | 1995-09-29 | 1997-09-09 | Cherry Semiconductor Corporation | Start up circuit and current-foldback protection for voltage regulators |
JP3706515B2 (ja) * | 1998-12-28 | 2005-10-12 | 矢崎総業株式会社 | 電源供給制御装置および電源供給制御方法 |
JP3767445B2 (ja) * | 2001-09-28 | 2006-04-19 | アンデン株式会社 | 過電流保護機能を有する電源供給装置、負荷駆動装置および車両用電源供給装置 |
-
2003
- 2003-11-25 JP JP2003393341A patent/JP4319012B2/ja not_active Expired - Fee Related
-
2004
- 2004-11-24 US US10/996,746 patent/US7289308B2/en active Active
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008192083A (ja) * | 2007-02-07 | 2008-08-21 | Nippon Telegr & Teleph Corp <Ntt> | 低飽和レギュレータ回路 |
JP2012003678A (ja) * | 2010-06-21 | 2012-01-05 | Renesas Electronics Corp | レギュレータ回路 |
CN110308756A (zh) * | 2018-03-27 | 2019-10-08 | 艾普凌科有限公司 | 电压调节器 |
CN110308756B (zh) * | 2018-03-27 | 2022-03-01 | 艾普凌科有限公司 | 电压调节器 |
JP2020135372A (ja) * | 2019-02-19 | 2020-08-31 | ローム株式会社 | 電源回路 |
US11720131B2 (en) | 2019-02-19 | 2023-08-08 | Rohm Co., Ltd. | Power supply circuit, power supply device, and motor vehicle including the same |
WO2020203439A1 (ja) * | 2019-03-29 | 2020-10-08 | いすゞ自動車株式会社 | 輸送管理装置、輸送管理方法、および、輸送システム |
CN114020086A (zh) * | 2021-11-11 | 2022-02-08 | 无锡迈尔斯通集成电路有限公司 | 一种随输入电压线性变化的ldo限流电路 |
Also Published As
Publication number | Publication date |
---|---|
US20050157437A1 (en) | 2005-07-21 |
JP4319012B2 (ja) | 2009-08-26 |
US7289308B2 (en) | 2007-10-30 |
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