(China (Mainland))
Product Summary
The BQ2040SN-C408TR estimates battery selfdischarge based on an internal timer and temperature sensor and user-programmable rate information stored in external EEPROM. The BQ2040SN-C408TR also automatically recalibrates or “learns” battery capacityin the full course of a discharge cycle from full to empty. The BQ2040SN-C408TR may operate directly from three nickel chemistry cells. With the REF output and an external transistor, a simple, inexpensive regulator can be built to provide VCC for other battery cell configurations. An external EEPROM is used to program initial values into the BQ2040SN-C408TR and is necessary for proper operation.
Parametrics
Absolute maximum ratings: (1)Relative to VSS: -0.3 to +7.0 V; (2)All other pins Relative to VSS: -0.3 to +7.0 V; (3)Relative to VSS: -0.3 to +8.5 V at Current limited by R11; (4)Relative to VSS: -0.3 +7.0 V at Minimum 100Ωseries resistor should be used to protect SR in case of a shorted battery.; (5)Operating temperature: 0 to +70 °C at Commercial.
Features
Features: (1)Provides accurate measurement of available charge in NiCd; (2)NiMH, and Li-Ion batteries; (3)Supports SBS v1.0 data set and two-wire interface; (4)Monitors charge FET in Li-Ion pack protection circuit; (5)Designed for battery pack integration; (6)Supports SBS charge control commands for NiCd, NiMH, and Li-Ion; (7)Drives a four-segment LED display for remaining capacity indication; (8)16-pin narrow SOIC.
Diagrams
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 BQ2040SN-C408TR |
Texas Instruments |
Battery Management Multi-Chemistry SBS |
Data Sheet |
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BQ2040SN-C408TRG4 |
Texas Instruments |
Battery Management Multi-Chemistry SBS |
Data Sheet |
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