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1. WO2002025798 - STEP-UP SWITCHING POWER SUPPLY DEVICE

Publication Number WO/2002/025798
Publication Date 28.03.2002
International Application No. PCT/JP2001/008135
International Filing Date 19.09.2001
IPC
H02M 3/158 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
156with automatic control of output voltage or current, e.g. switching regulators
158including plural semiconductor devices as final control devices for a single load
CPC
H02M 3/158
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
Applicants
  • TDK CORPORATION [JP]/[JP] (AllExceptUS)
  • ITOH, Kazuyuki [JP]/[JP] (UsOnly)
  • TANAKA, Katsuaki [JP]/[JP] (UsOnly)
Inventors
  • ITOH, Kazuyuki
  • TANAKA, Katsuaki
Agents
  • OISHI, Koichi
Priority Data
2000-28554820.09.2000JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) STEP-UP SWITCHING POWER SUPPLY DEVICE
(FR) DISPOSITIF D'ALIMENTATION ELECTRIQUE DE COMMUTATION ELEVEUR
Abstract
(EN)
A step-up switching power supply device small in switching loss, comprising a coil portion (3a) and a first diode (4) series-connected between one end of a dc power supply (2) and one end of a smoothing first capacitor (5), a first switching element (8) connected between a node (A) between the coil portion (3a) and the first diode (4) and the other end of the dc power supply (2), a second magnetic element (7) and a second switching element (9) series-connected between the node (A) and the other end of the dc power supply (2), and a second diode (10) and a second capacitor (11) series-connected between a node between the second magnetic element (7) and the second switching element (9) and the above node (A). When the second switching element (9) is turned on, an increase in current flowing through the second switching element (9) is restricted by the second magnetic element (7), while, when the second switching element (9) is turned off, an increase in voltage between the opposite ends of the second switching element (9) is restricted by charging of the second capacitor (11), thereby significantly reducing the switching loss of the second switching element (9).
(FR)
L'invention concerne un dispositif d'alimentation électrique de commutation éleveur petit en perte de commutation, comprenant à une partie de bobine (3a) et une première diode (4) reliées en série entre une extrémité d'un système d'alimentation électrique en courant continu (2) et une extrémité d'un premier condensateur de filtrage (5), un premier élément de commutation (8) relié entre un noeud (A) situé entre la partie de bobine (3a) et la première diode (4) et l'autre extrémité du système d'alimentation électrique en courant continu (2), un second élément magnétique (7) et un second élément de commutation (9) reliés en série entre le noeud (A) et l'autre extrémité du système d'alimentation électrique en courant continu (2), et une seconde diode (10) et un second condensateur (11) reliés en série entre un noeud situé entre le second élément magnétique (7) et le second élément de commutation (9) et le noeud (A) susmentionné. Lorsque le second élément de commutation (9) est activé, une augmentation du courant circulant à travers le second élément (9) est restreinte par le second élément magnétique (7), tandis que lorsque ledit élément (9) est désactivé, une augmentation de la tension entre les extrémités opposées du second élément (9) est restreinte par chargement du second condensateur (11), réduisant ainsi, de manière significative, la perte de commutation du second élément de commutation (9).
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