Semiconductor integrated circuit, protection circuit and battery pack

摘要

A semiconductor integrated circuit that protects a secondary battery by controlling an on/off status of a discharge control switch and a charge control switch includes an over discharge detection part configured to detect an over discharge condition based on a battery voltage of the secondary battery, a load removal detection part to detect whether a load connected to the secondary battery is removed based on a voltage of a load removal detection terminal connected to a negative electrode side of at least one of the load connected to the secondary battery and a battery charger through a resistor, an over discharge return part to return to a normal condition from the over discharge condition, and a control part to output a control signal for returning the over discharge condition to the normal condition to the over discharge return part upon detecting the load being removed in the over discharge condition.

主权项

1. A semiconductor integrated circuit configured to protect a secondary battery by controlling an on/off status of a discharge control switch and a charge control switch comprising:
an over discharge detection part configured to detect an over discharge condition based on a battery voltage of the secondary battery; a load removal detection part configured to detect whether a load connected to the secondary battery is removed or not based on a voltage of a load removal detection terminal connected to a negative electrode side of at least one of the load connected to the secondary battery and a battery charger through a resistor; an over discharge return part configured to return to a normal condition from the over discharge condition; and a control part configured to output a control signal for returning the over discharge condition to the normal condition to the over discharge return part upon detecting the load being removed in the over discharge condition.