Tracking external power supply

Details Tracking external power supply Tracking external power supply

H - Electricity

02

J

H02J 7/04 (2006.01) H02J 7/00 (2006.01) H02J 9/06 (2006.01) H04B 1/16 (2006.01)

Patent

CA 2144966

An external power supply (22) powers an electronic device (20) having rechargeable cells (70). The external power supply (22) provides power (26) having a voltage which tracks the rechargeable cells. The voltage of the external power supply preferably tracks with an offset above the voltage (86) of the rechargeable cells. An external power supply type indicating device (130), such as a resistor, indicates to the electronic device the type of external power supply. The external power supply (22) can thus provide power for fast-charge or trickle-charge operations, and charge control circuitry within the electronic device is capable of accurately controlling charge of the rechargeable cells based upon the type of external power supply indicated by the resistor.

Un système d'alimentation externe (22) alimente en courant un dispositif électronique (20) possédant des piles rechargeables (70). Le système d'alimentation externe (22) génère un courant (26) possédant une tension qui effectue un suivi de contrôle des piles rechargeables. La tension du système d'alimentation externe effectue de préférence un suivi de contrôle avec un décalage par rapport à la tension (86) des piles rechargeables. Un dispositif indicateur (130), tel qu'une résistance, indique au dispositif électronique le type de l'alimentation externe. Le système d'alimentation externe (22) peut produire par conséquent un courant adapté à des opérations de charge rapide ou charge lente, et le circuit de commande de charge se trouvant dans le dispositif électronique peut commander avec précision la charge des piles rechargeables sur la base du type d'alimentation externe indiquée par la résistance.

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