■Overview
Integrated (fixed size) battery packs have become mainstream in recent years to meet the thin design and high capacity batteries requirements of smartphones, tablets and other mobile devices. This has led to issues resulting in flat batteries due to dark current, even when the power is turned OFF, when shipped from the factory.
< MM3645xxxVRE > includes a function that prohibits forced discharge of batteries by receiving physical signals from external sources, which can minimize current consumption when batteries are stored. To overcome the increase in consumption current due to higher functionality of mobile devices, this IC employs external sensor resistance to detect overcurrent, which makes thermal protection of the battery pack easier compared to previous designs as it is less likely to be affected by changes in temperature or voltage.
§ Features
1. |
High-precision overcharge detection ±20 mV (25ºC) |
2. |
High-precision overcurrent detection ±15% (25ºC) |
3. |
Switch to forced discharge prohibition mode with external signal |
§ Main specifications
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|
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Overcharge detection |
4.0 to 4.5 V (5 mV steps) precision ±20 mV |
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Overdischarge detection |
2.0 to 3.0 V (50 mV steps) precision ±35 mV |
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Discharge overcurrent detection |
+20 to +300 mV (1 mV steps) precision ±15% |
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Charge overcurrent detection |
-20 to -300 mV (1 mV steps) precision ±15% |
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Short circuit detection |
0.45 to 0.9 V (50 mV steps) precision ±100 mV |
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Consumption current (ordinary use) |
3.0 µA typ. 5.5 µA max. |
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Consumption current (standby) |
0.1 µA max. |
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Package |
TSOP-8A |
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External dimensions |
3.1 x 2.0 x 0.75 (W x D x H) Unit: mm |
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