Charging circuit, charging apparatus, electronic equipment and charging method

A charging circuit comprising:

• a monitoring part configured to monitor a battery voltage applied to a battery at a supply node of the battery voltage and configured to output an overvoltage signal when the battery is in an overvoltage condition;
• a protection part configured to electrically disconnect the battery from an adaptor when receiving the overvoltage signal;
• and
• a switch which, when the battery is electrically disconnected from the adaptor, switches a monitoring node for monitoring an adaptor voltage outputted from the adaptor, from the supply node of the battery voltage to a supply node of a system voltage, which is applied to a system electrically connected with the battery and the adaptor and is different from the supply node of the battery voltage, based on the overvoltage signal to cause a control command for controlling the adaptor voltage based on the system voltage to be outputted.