| 摘要 |
<P>PROBLEM TO BE SOLVED: To shorten inspection time for an overcharge detection voltage inspection for an IC for secondary battery protection. <P>SOLUTION: An IC for secondary battery protection comprises an overcharge detection circuit for detecting overcharge of a secondary battery, and a delay circuit for delaying overcharge detection time in a predetermined period of delay time. A voltage lower than a designed value of an overcharge detection voltage is supplied to a power supply voltage terminal of the IC for secondary battery protection. The voltage of the power supply voltage terminal is gradually increased at a time interval shorter than overcharge detection delay time while a current value of the power supply voltage terminal is monitored. When a predetermined current value variation is obtained by the power supply voltage terminal, the voltage supplied to the power supply voltage terminal is detected as the overcharge detection voltage. <P>COPYRIGHT: (C)2013,JPO&INPIT |
