Electronic apparatus and power supply controlling method

Details Electronic apparatus and power supply controlling method Electronic apparatus and power supply controlling method

2007-10-23

2009-06-23

Fleming, Fritz M. (Department: 2836)

Electrical transmission or interconnection systems

Switching systems

Condition responsive

Reexamination Certificate

active

07550877

ABSTRACT:
The present invention relates to an electronic apparatus and a power supply controlling method with which input power source is switched efficiently in accordance with a load of a device. A power controller50, upon detecting a USB connection, monitors power consumption of a CPU44based on the operation status of the CPU44, and controls a switch42in accordance with a current supplied from a USB cable2. When the current is less than or equal to 500 mA, the switch42is switched to a terminal a. Before configuration, when the current is less than or equal to 100 mA, the switch42is switched to the terminal a, and then a regulator43is controlled so that the current will not exceed 100 mA. In USB suspend, the switch42is switched to a terminal b, and a regulator53stops output to a backup battery54. The present invention can be applied to a digital still camera supporting USB.

REFERENCES:
patent: 6151652 (2000-11-01), Kondo et al.
patent: 6271605 (2001-08-01), Carkner et al.
patent: 6580460 (2003-06-01), Takahashi et al.
patent: 6661462 (2003-12-01), Ohnogi
patent: 6662301 (2003-12-01), Sekine et al.
patent: 6753921 (2004-06-01), Shimizu
patent: 6885115 (2005-04-01), Hatori et al.
patent: 6977688 (2005-12-01), Hanada et al.
patent: 6983383 (2006-01-01), Saito et al.
patent: 7154553 (2006-12-01), Horii et al.
patent: 7197650 (2007-03-01), Watanabe et al.
patent: 0 862 313 (1998-09-01), None
patent: 10-243327 (1998-09-01), None
patent: 2000-184264 (2000-06-01), None
patent: 2001-331241 (2001-11-01), None
patent: 2002-237971 (2002-08-01), None

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