| 摘要 |
A semiconductor device for protecting a rechargeable cell at least from excessive discharge current due to over discharge of the rechargeable cell, includes (a) a first excessive discharge current detection circuit configured to detect first excess of a voltage at an externally or an internally provided electric current detection terminal exceeding a first voltage level (Vs 3 ), (b) a second excessive discharge current detection circuit configured to detect second excess of the absolute voltage at the electric current detection terminal exceeding a second voltage level (Vs 4 ) higher than the first voltage level, (c) a delay circuit configured to cause each of the first and second excessive discharge current detection circuits to delay its output by a predetermined delay time, and (d) a delay reducing circuit configured to produce a delay time reducing signal for reducing the delay time at a predetermined ratio when a negative voltage lower than a predetermined negative voltage level or a positive voltage higher than a third voltage level (Vt) is applied to the electric current detection terminal.
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