BATTERY CAPACITY ALARM CIRCUIT

摘要

A battery capacity alarm circuit comprises a voltage sampling module, a voltage comparing module, and an alarm module. The voltage sampling module gets a first voltage and a second voltage by dividing the voltage of battery, and outputs them to the voltage comparing module. The voltage comparing module compares said first voltage and said second voltage with a reference voltage, outputs a first electrical level to the alarm module when both the first voltage and the second voltage are greater than the reference voltage, outputs a second electrical level to the alarm module when the first voltage is less but the second voltage is greater than the reference voltage, and outputs a third electrical level to the alarm module when both the first voltage and the second voltage are less than the reference voltage. The alarm module outputs corresponding alarm signals based on the different electrical levels outputted from the voltage comparing module. Said circuit has simple implementation mode, high dependability, and can adapt to different application environments.