ELECTRONIC APPARATUS TO WHICH AC ADAPTOR CAN BE CONNECTED

• US 20110157789A1
• Filed: 10/21/2010
• Published: 06/30/2011
• Est. Priority Date: 12/25/2009
• Status: Active Grant

• Current Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: KITANO, Katsuya
• Granted Patent: US 8,411,419 B2
• Time in Patent Office: Days
• US Class Current: 361/679.01
• CPC Class Codes: G06F 1/26 Power supply means, e.g. regulation thereof for memories G11C
• CPC Class Codes: G06F 1/263 Arrangements for using multiple switchable power supplies, e.g. battery and AC G06F1/30 takes precedence
• CPC Class Codes: H02J 7/34 Parallel operation in networks using both storage and other dc sources, e.g. providing buffering H02J7/14 takes precedence

Abstract

In a case where a first AC adaptor with a small capacity is connected to a notebook personal computer, an electronic apparatus supplies electric power supplied from the first AC adaptor or electric power as a sum of the electric power supplied from the first AC adaptor and electric power supplied from a battery to the load (3), depending on a load state (power consumption). According to this configuration, irrespective of the amount of the power consumption at the load (3), it is possible to connect the first AC adaptor with a small capacity to the notebook personal computer so as to operate the load (3). The AC adaptor with a small capacity is downsized and reduced in weight since in general it has a smaller transformer (transforming circuit) in comparison with a large-capacity AC adaptor.

Claims

1. An electronic apparatus to which a transforming device and a battery can be connected, comprising:

an input terminal to which the transforming device can be connected;

a power source connected to the input terminal; and

a load connected to the power source,

wherein the power source circuit supplies electric power inputted to the input terminal to the load, and

in a case where a voltage is lowered to a predetermined voltage level, the power source circuit supplies electric power as a sum of the electric power inputted to the input terminal and electric power discharged from the battery to the load.