| 摘要 |
A protection monitoring circuit 101 includes a protection circuit 130 which detects at least one of overcharge, overdischarge, and overcurrent of a chargeable and dischargeable secondary battery 110 and protects the secondary battery 110 by performing an ON/OFF control of transistors M11 and M12, and a secondary battery monitoring circuit 120 which detects a state of the secondary battery 110. The protection circuit 130 supplies a power supply voltage to the secondary battery monitoring circuit 120. If overdischarge of the secondary battery is detected, the protection circuit 130 inhibits the supply of the power supply voltage to the secondary battery monitoring circuit 120 after a predetermined time has elapsed or after a control signal for inhibiting the supply of power supply voltage is received from the secondary battery monitoring circuit 120.
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