Features: Provides Accurate Measurement of Available Charge in Li-Ion and Li-Polymer Batteries Supports the Smart Battery Specification (SBS) V1.1 Works With the TI bq29311 Analog Front End (AFE) Protection IC to Provide Complete Pack Electronics for 10.8-V or 14.4-V Battery Packs With Few Externa...
bq2083: Features: Provides Accurate Measurement of Available Charge in Li-Ion and Li-Polymer Batteries Supports the Smart Battery Specification (SBS) V1.1 Works With the TI bq29311 Analog Front End (AFE) Pr...
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UNIT | ||
Supply voltage range, VDD relative to VSS |
-0.3 V to 6 V | |
Open-drain I/O pins, V(IOD) relative to VSS |
-0.3 V to 6 V | |
Input voltage range to all other pins, VI relative to VSS |
-0.3 V to VDD + 0.3 V | |
ESDS RatingESDS Rating | HBM | 1.5 kV |
CDM | 1.5 kV | |
MM | 50V | |
Operating free-air temperature range, TA | -20 to 85 | |
Storage temperature range, Tstg | -65 to 150 |
The bq2083-V1P2 SBS-compliant gas gauge IC for battery pack or in-system installation maintains an accurate record of available charge in Li-ion or Li-polymer batteries. The bq2083-V1P2 monitors capacity and other critical parameters of the battery pack and reports the information to the system host controller over a serial communication bus. It is designed to work with the bq29311 analog front-end (AFE) protection IC to maximize functionality and safety and minimize component count and cost in smart battery circuits. Using information from the bq2083-V1P2, the host controller can manage remaining battery power to extend the system run time as much as possible.
The bq2083-V1P2 uses an integrating converter with continuous sampling for the measurement of battery charge and discharge currents. Optimized for coulomb counting in portable applications, the self-calibrating integrating converter has a resolution better than 3-nVh and an offset measurement error of less than 1-V (typical). For voltage and temperature reporting, the bq2083-V1P2 uses a 16-bit A-to-D converter. In conjunction with the bq29311, the onboard ADC also monitors individual cell voltages in a battery pack and allows the bq2083-V1P2 to generate the control signals necessary to implement the cell balancing and the required safety protection for Li-ion and Li-polymer battery chemistries.
The bq2083-V1P2 supports the Smart Battery Data (SBData) commands and charge-control functions. It communicates data using the System Management Bus (SMBus) 2-wire protocol. The data available include the battery's remaining capacity, temperature, voltage, current, and remaining run-time predictions. The bq2083-V1P2 provides LED drivers and a push-button input to depict remaining battery capacity from full to empty in 20%, 25%, or 33% increments with a 3-, 4-, or 5-segment display.
The bq2083-V1P2 contains 512 bytes of internal data flash memory, which store configuration information. The information includes nominal capacity and voltage, self-discharge rate, rate compensation factors, and other programmable cell-modeling factors used to accurately adjust remaining apacity for use-conditions based on time, rate, and temperature. The bq2083-V1P2 also automatically calibrates or learns the true battery capacity in the course of a discharge cycle from programmable near full to near empty levels.
The bq29311 AFE protection IC provides power to the bq2083-V1P2 from a 3 or 4 series Li-ion cell stack, eliminating the need for an external gulator circuit.