DC-DC converter usable as a battery charger, and method for charging a battery

摘要

The DC-DC converter (1') comprises a current error amplifier (34') and a voltage error amplifier (30) connected in parallel to control the charging phase of the battery (18), during which a charging current (IBAT) is supplied to the battery (18) to bring the voltage (VBAT) of the battery (18) gradually up to a full charge voltage (VFIN); a charging interruption stage (QA, QB, MS5) for interrupting the charging phase before the voltage (VBAT) of the battery has reached the full charge voltage (VFIN); and an activation stage (104, 106) for activating the charging interruption stage (QA, QB, MS5) when the full charge voltage (VFIN) is close to the supply potential (VCC) at which the supply line (6) of the current error amplifier (34') is set. <IMAGE>