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1. WO2001057999 - DC/DC CONVERSION CIRCUIT

Publication Number WO/2001/057999
Publication Date 09.08.2001
International Application No. PCT/EP2001/000352
International Filing Date 12.01.2001
IPC
H02M 3/338 2006.1
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
22with intermediate conversion into ac
24by static converters
28using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
325using devices of a triode or a transistor type requiring continuous application of a control signal
335using semiconductor devices only
338in a self-oscillating arrangement
CPC
H02M 3/335
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
22with intermediate conversion into ac
24by static converters
28using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
325using devices of a triode or a transistor type requiring continuous application of a control signal
335using semiconductor devices only
H02M 3/3385
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
22with intermediate conversion into ac
24by static converters
28using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
325using devices of a triode or a transistor type requiring continuous application of a control signal
335using semiconductor devices only
338in a self-oscillating arrangement
3385with automatic control of output voltage or current
Applicants
  • KONINKLIJKE PHILIPS ELECTRONICS N.V. [NL]/[NL]
Inventors
  • SCHETTERS, Cornelis, J., A.
  • LAMMERS, Johannus, L., E., M.
  • VAN BODEGRAVEN, Tijmen, C.
Agents
  • DUIJVESTIJN, Adrianus, J.
Priority Data
00200380.404.02.2000EP
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) DC/DC CONVERSION CIRCUIT
(FR) CIRCUIT DE CONVERSION CONTINU-CONTINU
Abstract
(EN) DC/DC conversion circuit (1), comprising a transformer (2) having a primary winding (3), a secondary winding (4), and an auxiliary winding (5); a switching transistor (T), in a series circuit with the primary winding (3) between first and second direct current input terminals (6; 7); a start circuit (R1, C1) for switching the switching transistor (T) on at power - on a control transistor for switching off the switching transistor in dependence on a current flowing through the series circuit during operation. The auxiliary winding and the control transistor (Q) connect to a voltage control circuit (8) for setting an output power at the secondary winding by controlling switching-on of the switching transistor in dependence on the magnitude of a primary current. Via the auxiliary winding, a conversion circuit (1) builds - up the bias voltage for turning on the switching transistor in a time period inversely proportional to the amount of the secondary-side output power.
(FR) L'invention concerne un circuit (1) de conversion continu-continu, qui contient un transformateur (2) comportant un bobinage (3) primaire, un bobinage (4) secondaire et un bobinage (5) auxiliaire ; un transistor (T) de commutation formant un circuit en série avec le bobinage (3) primaire entre une première et une deuxième bornes (6, 7) d'entrée de courant ; un circuit (R1, C1) de mise en marche connecté à une électrode de commande du transistor (T) de commutation pour mettre en marche le transistor (T) de commutation par l'alimentation des bornes (6; 7) d'entrée de courant ; un transistor de commande connecté à l'électrode de commande du transistor (T) de commutation pour arrêter le transistor (T) de commutation en fonction du courant traversant le circuit en série à l'utilisation. Le bobinage (5) auxiliaire et le transistor (Q) de commande se connectent à un circuit (8) de réglage de tension pour régler une puissance de sortie fournie au bobinage (4) secondaire du transformateur (2), à l'utilisation, par une commande de mise en marche du transistor (T) de commutation dépendant de l'intensité du courant traversant le bobinage (3) primaire. Le circuit (1) de conversion est conçu de sorte qu'à l'utilisation, par l'intermédiaire du bobinage (5) auxiliaire, une tension requise à l'électrode de commande du transistor (T) de commutation pour que celui-ci fonctionne, s'accumule pendant une durée inversement proportionnelle à la puissance de sortie fournie au bobinage (4) secondaire.
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