Circuits, systems and methods for protecting batteries

摘要

In a protection circuit, a decision circuit generates a configuration signal indicative of an application requirement associated with a battery pack, generates an indication signal indicative of the battery pack's status, sets the indication signal to a first state if an abnormal condition is detected, and sets the indication signal to a second state if the battery pack is in a normal condition. A control circuit receives a supply signal indicative of a voltage at an input terminal of a switch, provides a protection signal to a control terminal of the switch to control the switch, and sets the protection signal to a first level or a second level according to the indication and configuration signals. The first level is equal to a level of the supply signal, and the second level is equal to the supply signal minus a predetermined voltage reference.