JP2006288191A - パルス幅変調モードおよび低ドロップアウト待機モードを備えるデュアルモード電圧調整器 - Google Patents
パルス幅変調モードおよび低ドロップアウト待機モードを備えるデュアルモード電圧調整器 Download PDFInfo
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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
- 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
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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
- 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
- H02M3/1584—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 with a plurality of power processing stages connected in parallel
-
- 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
-
- 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
- H02M1/0045—Converters combining the concepts of switch-mode regulation and linear regulation, e.g. linear pre-regulator to switching converter, linear and switching converter in parallel, same converter or same transistor operating either in linear or switching 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
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- Dc-Dc Converters (AREA)
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Abstract
【解決手段】この発明は、PWM部分12とLDO部分14とを単一チップ上に形成した電圧調整器10を提供する。PWM部分12は、大容量MOSトランジスタ16,18を高い周波数でスイッチング動作させる。待機モードでは、この電圧調整器10はLDOモードに切り換わり、PWM部分12をディスエーブルする。LDOモードでは、待機モード電流を供給するようにごく小さい直列接続MOSトランジスタ34を制御する。この直列接続MOSトランジスタ34のゲートは小さいので、待機モードにおける直列接続トランジスタ34のコンダクタンスの制御のためのゲート電荷変動はごく小さくて十分である。したがって、この電圧調整器10を内蔵するセルラー電話ハンドセットなどの電池駆動式応用装置の電池の寿命を著しく延ばすことができる。
【選択図】図1
Description
12 PWM電圧調整器
14 線型(LDO)電圧調整器
16,18 大容量MOSトランジスタ(スイッチング用)
32 誤差増幅器
44 差動増幅器
46 比較器
Claims (17)
- 電圧調整器であって、
パルス幅変調(PWM)制御部と、第1の大きさの少なくとも一つのMOSスイッチングトランジスタ、すなわち入力電圧源に接続した第1の端子および負荷に出力電流を供給する第2の端子を有する少なくとも一つのMOSスイッチングトランジスタとを有するPWM電圧調整器部分であって、前記PWM制御部が前記電圧調整器の出力電圧対応の饋還電圧を受け前記電圧調整器の調整ずみ出力電圧の維持のためのデューティサイクルで前記少なくとも一つのMOSスイッチングトランジスタをスイッチング動作させ、前記少なくとも一つのMOSスイッチングトランジスタが前記負荷に第1の最大電流以下の電流を供給するPWM電圧調整器部分と、
前記電圧調整器の出力電圧対応の饋還電圧を受け前記饋還電圧と基準電圧との差に基づく誤差信号を生ずる誤差増幅器と、この誤差増幅器の出力に制御されるコンダクタンスを有する直列接続MOSトランジスタであって、入力電圧源に接続した第1の端子および前記負荷への調整ずみ出力電圧を供給する第2の端子を有し、前記第1の大きさの5分の1以下の第2の大きさを備え、前記第1の最大電流の5分の1以下の第2の最大電流以下の電流を前記負荷に供給する直列接続MOSトランジスタ部分とを有する低ドロップアウト(LDO)電圧調整器部分と、
低電流モードの立上りを表すモード選択信号を第1の状態で受け、それに応答して前記PWM電圧調整器部分をディスエーブルするとともに前記LDO電圧調整器部分をイネーブルし、前記低電流モード以外のモードの立上りを表すモード選択信号を第2の状態で受け、それに応答して前記PWM電圧調整器部分をイネーブルするとともに前記LDO電圧調整器部分をディスエーブルするモード選択回路と
を含み、前記PWM電圧調整器部分、前記LDO電圧調整器部分および前記モード選択回路を単一のチップの上に形成してある電圧調整器。 - 前記第1の最大電流が0.5A以上であり、前記第2の最大電流が0.1A以下である請求項1記載の電圧調整器。
- 前記少なくとも一つのMOSスイッチングトランジスタがPMOSトランジスタと、同期スイッチング動作のNMOSトランジスタとを含む請求項1記載の電圧調整器。
- 低電流待機モードを指定するように前記モード選択信号を生ずる第1の回路をさらに含む請求項1記載の電圧調整器。
- 前記第1の回路がマイクロプロセッサである請求項4記載の電圧調整器。
- 前記第1の回路が、負荷電流を検出しその負荷電流が閾値電流以下に低下したとき前記モード選択信号を生ずる電流検出回路である請求項4記載の電圧調整器。
- 前記直列接続MOSトランジスタが前記第1の大きさの10分の1の第2の大きさを備える請求項1記載の電圧調整器。
- 前記少なくとも一つのMOSスイッチングトランジスタの前記第1の端子を電圧源に接続し、前記直列接続MOSトランジスタの前記第1の端子を、前記PWM電圧調整器部分の動作に起因する前記電圧源の電圧の高周波雑音の除去のためにフィルタずみ電圧源電圧出力に接続する請求項1記載の電圧調整器。
- 前記電圧調整器のDC出力端子に接続した出力端子を有するフィルタ回路をさらに含み、前記少なくとも一つのMOSスイッチングトランジスタの前記第2の端子を前記フィルタ回路の入力に接続し、前記直列接続MOSトランジスタの前記第2の端子を前記電圧調整器の前記DC出力端子に接続した請求項1記載の電圧調整器。
- 前記電圧調整器のDC出力端子に接続した出力端子を有するフィルタ回路をさらに含み、前記少なくとも一つのMOSスイッチングトランジスタの前記第2の端子および前記直列接続MOSトランジスタの前記第2の端子を前記フィルタ回路の入力に接続した請求項1記載の電圧調整器。
- 前記PWM制御部への前記饋還電圧と前記LDO電圧調整器部分の中の前記誤差増幅器への前記饋還電圧とが同じである請求項1記載の電圧調整器。
- 電圧調整の方法であって、
第1の大きさの少なくとも一つのMOSスイッチングトランジスタ、すなわち第1の入力電圧の電圧源に接続した第1の端子および負荷に出力電流を供給する第2の端子を備え前記負荷に第1の最大電流以下の電流を供給する少なくとも一つのMOSスイッチングトランジスタを、電圧調整器の調整ずみの出力電圧を維持するように、パルス幅変調(PWM)制御部を有するPWM電圧調整器部分により一つのデューティサイクルでスイッチング動作させる過程と、
前記少なくとも一つのMOSスイッチングトランジスタの前記デューティサイクルを制御するように前記電圧調整器の出力電圧対応の饋還電圧を前記PWM制御部で受ける過程と、
前記電圧調整器の低ドロップアウト(LDO)電圧調整器部分の中の誤差増幅器の出力により直列接続MOSトランジスタ、すなわち第1の入力電圧源に接続した第1の端子および前記負荷に調整ずみの電圧を供給する第2の端子を備えるとともに前記第1の大きさの5分の1以下の第2の大きさを備え、前記第1の最大電流の5分の1の第2の最大電流以下の電流を供給する直列接続MOSトランジスタのコンダクタンスを制御する過程と、
前記電圧調整器の出力電圧対応の饋還電圧を前記誤差増幅器により受け、前記饋還電圧と基準電圧との差に基づく誤差信号を生ずる過程と、
低電流モードの立上りを表すモード選択信号を第1の状態でモード選択回路で受け、それに応答して前記PWM電圧調整器部分をイネーブルするとともに前記LDO電圧調整器部分をディスエーブルする過程と
を含み、前記PWM電圧調整部分、前記LDO電圧調整器部分および前記モード選択回路が単一のチップ上にある
電圧調整の方法。 - 前記第1の最大電流が0.5A以上であり、前記第2の最大電流が0.1A以下である請求項12記載の電圧調整の方法。
- 前記少なくとも一つのMOSスイッチングトランジスタがPMOSトランジスタと、同期スイッチング動作のNMOSトランジスタとを含む請求項12記載の電圧調整の方法。
- 前記直列接続MOSトランジスタが前記第1の大きさの10分の1の第2の大きさを備える請求項12記載の電圧調整の方法。
- 前記少なくとも一つのMOSスイッチングトランジスタの前記第1の端子を電圧源に接続してあり、前記PWM電圧調整器部分の動作に起因する前記電圧源からの電圧の高周波雑音を除去してフィルタ処理ずみ電源電圧を生ずる過程をさらに含み、前記直接接続MOSトランジスタの前記第1の端子を前記フィルタ処理ずみ電源電圧出力に接続してある請求項12記載の電圧調整の方法。
- 前記電圧調整器のDC出力電圧を生ずるように前記少なくとも一つのMOSスイッチングトランジスタの電流出力をフィルタ処理する過程をさらに含む請求項12記載の電圧調整の方法。
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US11/096,680 US7064531B1 (en) | 2005-03-31 | 2005-03-31 | PWM buck regulator with LDO standby mode |
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KR101003892B1 (ko) | 2006-11-06 | 2010-12-30 | 마이크렐 인코포레이티드 | 듀얼입력 우선화 ldo 레귤레이터 |
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KR20190058220A (ko) * | 2017-11-20 | 2019-05-29 | (주)케이티엔에프 | 듀얼모드를 갖는 서버용 전압조정기 |
KR102079551B1 (ko) | 2017-11-20 | 2020-02-20 | (주)케이티엔에프 | 듀얼모드를 갖는 서버용 전압조정기 |
CN108975068A (zh) * | 2018-08-18 | 2018-12-11 | 无锡诚勇自动化技术有限公司 | 一种张力控制器 |
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JP4319661B2 (ja) | 2009-08-26 |
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US7064531B1 (en) | 2006-06-20 |
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