AC ADAPTOR AND CHARGING METHOD THEREFOR

摘要

PROBLEM TO BE SOLVED: To suppress the heat generation of a charge control element in a body. SOLUTION: AΔV detection circuit (45) arranged at a secondary-side circuit detects the bouncing of an adapter voltage (VADP) that is generated when a charging state shifts to a constant voltage charging region from a constant current charging region, and outputs a detection signal. A variable resistor (R6') is reduced in its resistance value in response to the detected signal. Thereby a reference voltage fed to a constant voltage control circuit (42) is regulated so that the adapter voltage (VADP) is lowered by an amount of the bounced voltage (ΔV'-ΔV). COPYRIGHT: (C)2005,JPO&NCIPI