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1. WO2006126639 - POWER SUPPLY APPARATUS HAVING SWITCHABLE SWITCHING REGULATOR AND LINEAR REGULATOR

Publication Number WO/2006/126639
Publication Date 30.11.2006
International Application No. PCT/JP2006/310457
International Filing Date 25.05.2006
IPC
H02M 3/155 2006.01
HELECTRICITY
02GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
MAPPARATUS 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
3Conversion of dc power input into dc power output
02without intermediate conversion into ac
04by static converters
10using discharge tubes with control electrode or semiconductor devices with control electrode
145using devices of a triode or transistor type requiring continuous application of a control signal
155using semiconductor devices only
G05F 1/56 2006.01
GPHYSICS
05CONTROLLING; REGULATING
FSYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
1Automatic 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
10Regulating voltage or current
46wherein the variable actually regulated by the final control device is dc
56using semiconductor devices in series with the load as final control devices
CPC
H02M 2001/0032
HELECTRICITY
02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
MAPPARATUS 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
1Details of apparatus for conversion
0003Details of control, feedback and regulation circuits
0032Control circuits allowing low power mode operation, e.g. "standby"
H02M 2001/0045
HELECTRICITY
02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
MAPPARATUS 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
1Details of apparatus for conversion
0045Converters combining the concepts of switch-mode regulation and linear regulation, e.g. linear preregulator to switching converter, linear and switching converter in parallel, same converter or same transistor operating either in linear or switching mode
H02M 3/1588
HELECTRICITY
02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
MAPPARATUS 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
3Conversion of dc power input into dc power output
02without intermediate conversion into ac
04by static converters
10using discharge tubes with control electrode or semiconductor devices with control electrode
145using devices of a triode or transistor type requiring continuous application of a control signal
155using semiconductor devices only
156with automatic control of output voltage or current, e.g. switching regulators
158including plural semiconductor devices as final control devices for a single load
1588comprising at least one synchronous rectifier element
Y02B 70/10
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
70Technologies for an efficient end-user side electric power management and consumption
10Technologies 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
Applicants
  • ローム株式会社 ROHM CO., LTD. [JP]/[JP] (AllExceptUS)
  • 渡辺 裕之 WATANABE, Hiroyuki [JP]/[JP] (UsOnly)
  • 山本 勲 YAMAMOTO, Isao [JP]/[JP] (UsOnly)
Inventors
  • 渡辺 裕之 WATANABE, Hiroyuki
  • 山本 勲 YAMAMOTO, Isao
Agents
  • 森下 賢樹 MORISHITA, Sakaki
Priority Data
2005-15423826.05.2005JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) POWER SUPPLY APPARATUS HAVING SWITCHABLE SWITCHING REGULATOR AND LINEAR REGULATOR
(FR) APPAREIL D'ALIMENTATION COMPORTANT UN REGULATEUR PAR COMMUTATION COMMUTABLE ET UN REGULATEUR LINEAIRE
(JA) 切り替え可能なスイッチングレギュレータおよびリニアレギュレータを備える電源装置
Abstract
(EN)
In a power supply apparatus having a step-down switching regulator and a linear regulator, a control circuit is provided which can efficiently switch two power supplies. A PWM control part (20) generates a pulse width modulation signal (Vpwm) the duty ratio of which is controlled such that the output voltage of a switching regulator gets close to a predetermined reference voltage. A forced-off circuit (50) monitors a switching voltage (Vsw), and turns off a synchronization/rectification transistor (M2) when the switching voltage (Vsw) exceeds a first threshold voltage (Vth1). A minimum on-time setting circuit (60) limits the duty ratio of the pulse width modulation signal (Vpwm) such that the on-time of a switching transistor (M1) is longer than a predetermined minimum value. A selector circuit (80) monitors an error voltage (Verr), and activates a linear regulator (70) to halt the step-down switching regulator (110) when a predetermined state lasts for a predetermined first time period.
(FR)
Dans un appareil d'alimentation possédant un régulateur par commutation d'abaissement de tension et un régulateur linéaire, un circuit de commande est prévu, lequel peut efficacement commuter deux alimentations. Une partie de commande par modulation de largeur d'impulsion (PWM) (20) génère un signal de modulation de largeur d'impulsion (Vpwm) dont le rapport cyclique est régulé de telle sorte que la tension de sortie du régulateur par commutation approche une tension de référence prédéterminée. Un circuit forçant la mise hors tension (50) surveille une tension de commutation (Vsw) et met hors tension un transistor de synchronisation/redressement (M2) lorsque la tension de commutation (Vsw) dépasse une première tension de seuil (Vth1). Un circuit de réglage de durée minimale sous tension (60) limite le rapport cyclique du signal de modulation de largeur d'impulsion (Vpwm) de telle sorte que la durée sous tension d'un transistor de commutation (M1) est plus longue qu'une valeur minimale prédéterminée. Un circuit de sélecteur (80) surveille une tension d'erreur (Verr) et active un régulateur linéaire (70) afin de stopper le régulateur par commutation d'abaissement de tension (110) lorsqu'un état prédéterminé dure pendant un premier intervalle de temps prédéterminé.
(JA)
 降圧型スイッチングレギュレータとリニアレギュレータを備える電源装置において、2つの電源を効率よく切り替え可能な制御回路が提供される。  PWM制御部20は、スイッチングレギュレータの出力電圧が所定の基準電圧に近づくようデューティ比が制御されるパルス幅変調信号Vpwmを生成する。強制オフ回路50は、スイッチング電圧Vswをモニタし、第1しきい値電圧Vth1を上回ると同期整流用トランジスタM2をオフする。最小オン時間設定回路60は、スイッチングトランジスタM1のオン時間が所定の最小値より長くなるように、パルス幅変調信号Vpwmのデューティ比を制限する。セレクタ回路80は、誤差電圧Verrをモニタし、所定の状態が所定の第1期間継続すると、リニアレギュレータ70を動作状態とし、降圧型スイッチングレギュレータ110を停止状態とする。
Also published as
EP6746836
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