Switched-mode power supply arrangement

H - Electricity – 02 – M

Patent

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Details

H02M 3/28 (2006.01) H02M 3/22 (2006.01)

Patent

CA 2252774

The invention relates to a switched-mode power supply arrangement comprising at least two switched-mode-type power supplies (1) that comprise a transformer (2) and that have outputs (Uout) connected in parallel. According to the invention, each parallel-connected switched-mode power supply (1) comprises means (4) for generating in a reference voltage output (Uref) a voltage that is proportional to the pulse duty factor of the secondary voltage of the transformer (2), the reference voltage outputs (Uref) of each switched-mode power supply (1) to be connected in parallel are coupled together, and each parallel-connected switched-mode power supply (1) also comprises means (5, 6) for detecting a current flowing through the reference voltage output (Uref) and for generating a correction voltage (Ucor) that is proportional to this current in order to correct the output voltage (Uout) of the switched-mode power supply.

Cette invention concerne une alimentation à découpage comprenant au moins deux alimentations du type à découpage (1) qui comportent un transformateur (2) et des sorties (Uout) connectées en parallèle. Dans cette invention, chaque alimentation à découpage (1) connectée en parallèle comprend un dispositif (4) qui génère, dans une sortie de tension de référence (Uref), une tension qui est proportionnelle au facteur de durée de la tension secondaire du transformateur (2), les sorties de tension de référence (Uref) de chaque alimentation à découpage (1) devant être connectées en parallèle sont couplées ensemble, et chaque alimentation à découpage (1) connectée en parallèle comprend également un dispositif (5, 6) servant à détecter un courant passant par la sortie de tension de référence (Uref) et à générer une tension de correction (Ucor) qui est proportionnelle à ce courant afin de corriger la tension de sortie (Uout) de l'alimentation à découpage.

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