JP6592374B2 - スイッチングレギュレータ - Google Patents
スイッチングレギュレータ Download PDFInfo
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- JP6592374B2 JP6592374B2 JP2016032102A JP2016032102A JP6592374B2 JP 6592374 B2 JP6592374 B2 JP 6592374B2 JP 2016032102 A JP2016032102 A JP 2016032102A JP 2016032102 A JP2016032102 A JP 2016032102A JP 6592374 B2 JP6592374 B2 JP 6592374B2
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/157—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators with digital control
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1588—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load comprising at least one synchronous rectifier element
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/14—Arrangements for reducing ripples from dc input or output
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0032—Control circuits allowing low power mode operation, e.g. in standby mode
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Description
出力端子6の電圧が所定の電圧より低くなりフィードバック電圧VFBが基準電圧VREFより低下した場合、エラーコンパレータ610はH信号を出力する。R−Sフリップフロップ回路609は、入力端子SにH信号が入力されると、出力端子QからH信号を出力する。出力制御回路615は、ドライバ607及び608を通じてPMOSトランジスタ602をオンし、NMOSトランジスタ604をオフする。その状態ではノードN1よりH信号が出力され、インダクタ603と出力容量605を介して出力端子6の電圧を上昇させる。
電源電圧Vinが低下し、出力電圧Voutが所定の電圧以下となっても、VIN>Voutの関係を維持したまま両者の電圧が低下していく(T1以前)。
ハイサイドスイッチング素子の出力信号を監視してハイサイドスイッチング素子のオン時間を制御する信号を出力するオン時間制御回路と、エラーコンパレータの信号とオン時間制御回路の信号に基づいた信号を生成するフリップフロップ回路と、フリップフロップ回路が出力する信号に基づき制御信号を生成する出力制御回路と、ハイサイドスイッチング素子が所定の時間以上オン状態が続く100%DUTYを検出して検出信号を出力制御回路に出力する100%DUTY検出回路と、を備え、記出力制御回路は検出信号を受けるとハイサイドスイッチング素子をオフする制御信号を出力する、構成とした。
図1は、本実施形態のスイッチングレギュレータの回路図である。
本実施形態のスイッチングレギュレータ100は、フィードバック抵抗17と、基準電圧回路12と、エラーコンパレータ10と、R−Sフリップフロップ回路9と、出力制御回路15と、ドライバ7及び8と、ハイサイドスイッチング素子であるPMOSトランジスタ2と、ローサイドスイッチング素子であるNMOSトランジスタ4と、オン時間制御回路20と、最小オフ時間生成回路11と、100%DUTY検出回路30と、インダクタ3と、出力容量5とを備えている。
出力端子6から出力される出力電圧Voutが所定の電圧より低くなると、フィードバック電圧VFBが低下する。エラーコンパレータ10は、フィードバック電圧VFBと基準電圧VREFを比較する。フィードバック電圧VFBが基準電圧VREFより低くなると、エラーコンパレータ10はH信号をR−Sフリップフロップ回路9の入力端子Sに出力する。
図2は、オン時間制御回路20の一例を示す回路図である。ノードN1よりオン時間制御回路20に入力された発振信号は、抵抗24、26と容量25、27で構成するフィルタ回路で平滑され、即ち、出力電圧Voutに等しい一定電圧に変換されて、コンパレータ21の反転入力端子に入力される。一方、コンパレータ21の非反転入力端子には、定電流源23によって充電される容量22の電圧が入力される。
式1と式2から、式3のようになり、COT制御を利用したスイッチングレギュレータにおいては、ノードN1の発振信号の周期Tcycleは電源電圧Vinや出力電圧Voutに依存しない値となる。発振信号の周期で決まる発振周波数も同様に、電源電圧Vinと出力電圧Voutに依存しない一定値となる。
ここで、電源電圧Vinが低下して出力電圧Voutと近くなると、オン時間Tonは発振信号周期Tcycleと同じ値になる。即ち、発振信号のDuty比は100%となり、その結果PMOSトランジスタ2はオンし続け、電源電圧Vinが出力端子6にそのまま供給されることになる。
100%DUTY検出回路30は、ドライバ7の入力端子の電圧を入力信号としている。
通常動作時の入力信号が入力されていると、容量32は充放電を繰り返し、その電圧はNMOSトランジスタ34の閾値電圧を越えることない。
時刻t0以降、PMOSトランジスタ2がオンし続けると、100%DUTY検出回路30は所定の時間後の時刻t1で100%DUTY状態を検出し、検出信号を出力する。出力制御回路15は、100%DUTY検出回路30の出力する検出信号を受けて、ドライバ7にH信号を出力し、PMOSトランジスタ2をオフ状態にする。そして、100%DUTY検出回路30は、ドライバ7の入力端子のH信号を受けて、NMOSトランジスタ31がオンして容量32を放電するので、L信号を出力する。
また、ローサイドスイッチング素子もバイポーラトランジスタやダイオードなど、その他の素子であっても同様である。
10 エラーコンパレータ
11 最小オフ時間生成回路
12 基準電圧回路
15 出力制御回路
20 オン時間制御回路
30 100%DUTY検出回路
Claims (3)
- 電源端子に接続され、ゲートに入力される制御信号に基づいて断続的な出力信号を出力するハイサイドスイッチング素子と、
前記出力信号を平滑した出力電圧を出力端子に出力する平滑回路と、
前記出力電圧を監視するエラーコンパレータと、
前記出力信号を監視し、前記ハイサイドスイッチング素子のオン時間を制御する信号を出力するオン時間制御回路と、
前記エラーコンパレータの信号と前記オン時間制御回路の信号に基づいた信号を生成するフリップフロップ回路と、
前記フリップフロップ回路が出力する信号に基づき、前記制御信号を生成する出力制御回路と、
前記ハイサイドスイッチング素子が所定の時間以上オン状態が続く100%DUTYを検出し、検出信号を前記出力制御回路に出力する100%DUTY検出回路と、を備え、
前記出力制御回路は、前記検出信号を受けると前記ハイサイドスイッチング素子をオフする前記制御信号を出力する
ことを特徴とするスイッチングレギュレータ。 - 前記100%DUTY検出回路は、前記制御信号を監視して、前記100%DUTYを検出する、
ことを特徴とする請求項1記載のスイッチングレギュレータ。 - 前記ハイサイドスイッチング素子のオフ状態を検出すると、所定の時間はオフ状態を維持するための信号を前記出力制御回路に出力する最小オフ時間生成回路を、備えた
ことを特徴とする請求項1または2記載のスイッチングレギュレータ。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2016032102A JP6592374B2 (ja) | 2016-02-23 | 2016-02-23 | スイッチングレギュレータ |
TW106104683A TWI710205B (zh) | 2016-02-23 | 2017-02-14 | 開關調節器 |
KR1020170020601A KR102576886B1 (ko) | 2016-02-23 | 2017-02-15 | 스위칭 레귤레이터 |
US15/434,334 US9912237B2 (en) | 2016-02-23 | 2017-02-16 | Switching regulator |
CN201710099374.7A CN107104594A (zh) | 2016-02-23 | 2017-02-23 | 开关调节器 |
Applications Claiming Priority (1)
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JP2016032102A JP6592374B2 (ja) | 2016-02-23 | 2016-02-23 | スイッチングレギュレータ |
Publications (2)
Publication Number | Publication Date |
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JP2017153209A JP2017153209A (ja) | 2017-08-31 |
JP6592374B2 true JP6592374B2 (ja) | 2019-10-16 |
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US (1) | US9912237B2 (ja) |
JP (1) | JP6592374B2 (ja) |
KR (1) | KR102576886B1 (ja) |
CN (1) | CN107104594A (ja) |
TW (1) | TWI710205B (ja) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
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CN105896942B (zh) | 2016-05-18 | 2018-12-25 | 矽力杰半导体技术(杭州)有限公司 | 开关型调节器的控制电路、控制方法及开关型调节器 |
US10790746B2 (en) * | 2017-08-04 | 2020-09-29 | Dialog Semiconductor (Uk) Limited | Power dissipation regulated buck architecture |
CN112751483A (zh) * | 2020-12-29 | 2021-05-04 | 成都锐成芯微科技股份有限公司 | 一种恒压控制电路 |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
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US6812782B2 (en) * | 2002-10-25 | 2004-11-02 | Texas Instruments Incorporated | Switch mode converter that allows 100% duty cycle on gate driver |
JP4868750B2 (ja) * | 2004-03-16 | 2012-02-01 | ローム株式会社 | スイッチングレギュレータ |
US8476887B2 (en) * | 2004-12-03 | 2013-07-02 | Texas Instruments Incorporated | DC to DC converter with pseudo constant switching frequency |
JP4890940B2 (ja) * | 2006-05-23 | 2012-03-07 | 株式会社リコー | 昇降圧スイッチングレギュレータ及びその制御方法 |
US7443148B2 (en) * | 2006-09-11 | 2008-10-28 | Micrel, Inc. | Constant on-time regulator with increased maximum duty cycle |
EP2280468B1 (en) * | 2009-07-28 | 2015-09-09 | STMicroelectronics Srl | Driving circuit for an electric load and system comprising the circuit |
JP2011055692A (ja) * | 2009-09-04 | 2011-03-17 | Rohm Co Ltd | スイッチングレギュレータ |
CN102801288B (zh) * | 2012-08-29 | 2015-05-13 | 成都芯源***有限公司 | 控制电路、开关模式变换器及控制方法 |
US9625932B2 (en) * | 2012-09-05 | 2017-04-18 | Silicon Works Co., Ltd. | Switching mode converter having 100% duty cycle mode and method for controlling thereof |
US9201441B2 (en) * | 2012-12-18 | 2015-12-01 | Fairchild Semiconductor Corporation | DC/DC converter with shunt circuitry |
CN103199703B (zh) * | 2013-04-03 | 2015-08-05 | 矽力杰半导体技术(杭州)有限公司 | 一种电压型调节器的控制电路及其控制方法 |
JP6211916B2 (ja) * | 2013-12-24 | 2017-10-11 | エスアイアイ・セミコンダクタ株式会社 | スイッチングレギュレータ |
JP6581757B2 (ja) * | 2014-05-12 | 2019-09-25 | 新日本無線株式会社 | スイッチング電源装置 |
JP6393169B2 (ja) * | 2014-11-27 | 2018-09-19 | エイブリック株式会社 | Dc−dcコンバータ |
-
2016
- 2016-02-23 JP JP2016032102A patent/JP6592374B2/ja active Active
-
2017
- 2017-02-14 TW TW106104683A patent/TWI710205B/zh active
- 2017-02-15 KR KR1020170020601A patent/KR102576886B1/ko active IP Right Grant
- 2017-02-16 US US15/434,334 patent/US9912237B2/en active Active
- 2017-02-23 CN CN201710099374.7A patent/CN107104594A/zh active Pending
Also Published As
Publication number | Publication date |
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TWI710205B (zh) | 2020-11-11 |
US9912237B2 (en) | 2018-03-06 |
KR102576886B1 (ko) | 2023-09-08 |
CN107104594A (zh) | 2017-08-29 |
KR20170099367A (ko) | 2017-08-31 |
TW201803260A (zh) | 2018-01-16 |
US20170244320A1 (en) | 2017-08-24 |
JP2017153209A (ja) | 2017-08-31 |
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