Input current or voltage limited power supply

Details Input current or voltage limited power supply Input current or voltage limited power supply

H - Electricity

02

M

H02M 1/14 (2006.01) G05F 1/46 (2006.01) G05F 5/00 (2006.01) H02M 7/04 (2006.01)

Patent

CA 2610566

An apparatus comprises a linear power supply and an auxiliary power supply powered from the linear power supply. The auxiliary power supply comprises a switching regulator connected to receive, at an input thereof, the output voltage of the linear power supply and to generate therefrom an output voltage of the auxiliary power supply. The auxiliary power supply further comprises a detection circuit, connected to the linear power supply and to the switching regulator, that detects one of (i) a level of current drawn from the linear power supply and (ii) a level of voltage at an output of the linear power supply and that causes the switching regulator to reduce its load on the linear power supply when the detected level reaches a predetermined threshold.

Dispositif comprenant un bloc d'alimentation linéaire et un bloc d'alimentation auxiliaire alimenté par le bloc d'alimentation linéaire. Le bloc d'alimentation auxiliaire comprend un régulateur à découpage dont l'entrée reçoit la tension de sortie du bloc d'alimentation linéaire afin de générer une tension à la sortie du bloc d'alimentation auxiliaire. Le bloc d'alimentation auxiliaire comprend également un circuit de détection, raccordé au bloc d'alimentation linéaire et au régulateur à découpage, qui détecte (i) l'intensité du courant produit par le bloc d'alimentation linéaire et (ii) la tension à la sortie de ce dernier, réduisant ainsi la charge imposée au bloc d'alimentation linéaire lorsque le niveau mesuré atteint un seuil prédéfini.

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