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BQ27541-V200 Datasheet(PDF) 8 Page - Texas Instruments |
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BQ27541-V200 Datasheet(HTML) 8 Page - Texas Instruments |
8 / 46 page bq27541-V200 SLUSA11B – FEBRUARY 2010 – REVISED SEPTEMBER 2013 www.ti.com The bq27541 measures charge/discharge activity by monitoring the voltage across a small-value series sense resistor (5 m Ω to 20 mΩ typ.) located between the CELL-and the battery’s PACK-terminal. When a cell is attached to the bq27541, cell impedance is computed, based on cell current, cell open-circuit voltage (OCV), and cell voltage under loading conditions. The bq27541 external temperature sensing is optimized with the use of a high accuracy negative temperature coefficient (NTC) thermistor with R25 = 10k Ω ± 1% and B25/85 = 3435kΩ ± 1% (such as Semitec 103AT for measurement). The bq27541 can also be configured to use its internal temperature sensor. The bq27541 uses temperature to monitor the battery-pack environment, which is used for fuel gauging and cell protection functionality. To minimize power consumption, the bq27541 has different power modes: NORMAL, SLEEP, FULLSLEEP, and HIBERNATE. The bq27541 passes automatically between these modes, depending upon the occurrence of specific events, though a system processor can initiate some of these modes directly. More details can be found in section Power Modes. NOTE FORMATTING CONVENTIONS IN THIS DOCUMENT: Commands: italics with parentheses( ) and no breaking spaces. e.g. RemainingCapacity( ) Data Flash: italics, bold, and breaking spaces. e.g. Design Capacity Register bits and flags: italics with brackets[ ]. e.g. [TDA] Data flash bits: italics, bold, and brackets[ ]. e.g: [LED1] Modes and states: ALL CAPITALS. e.g. UNSEALED mode do not delete this subsection 8 Submit Documentation Feedback Copyright © 2010–2013, Texas Instruments Incorporated Product Folder Links: bq27541-V200 Not Recommended for New Designs |
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