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Product InformationFeatures
Description
The bq2085-V1P3 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 bq2085-V1P3 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 bq2085-V1P3, the host controller can manage remaining battery power to extend the system run time as much as possible. The bq2085-V1P3 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-µV (typical). For voltage and temperature reporting, the bq2085-V1P3 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 bq2085-V1P3 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 bq2085-V1P3 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 bq2085-V1P3 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 bq2085-V1P3 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 capacity for use-conditions based on time, rate, and temperature. The bq2085-V1P3 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 bq2085-V1P3 from a 3 or 4 series Li-ion cell stack, eliminating the need for an external regulator circuit. |
| Price | Packaging | CAD Design Tools | Samples | ||||||
| Device | Status | Temp (oC) | Price | Quantity | Package | Pins | Top Side Marking | Package QTY | Package Carrier | Symbols | Footprints | Samples |
| BQ2085DBT-V1P3 | ACTIVE | -20 to 85 | 5.05 | 1ku | TSSOP (DBT) | 38 | View | 50 | TUBE | |||
| BQ2085DBT-V1P3G4 | ACTIVE | -20 to 85 | 5.05 | 1ku | TSSOP (DBT) | 38 | View | 50 | TUBE | |||
| BQ2085DBTR-V1P3 | ACTIVE | -20 to 85 | 4.60 | 1ku | TSSOP (DBT) | 38 | View | 2000 | LARGE T&R | Purchase Samples | ||
| BQ2085DBTR-V1P3G4 | ACTIVE | -20 to 85 | 4.60 | 1ku | TSSOP (DBT) | 38 | View | 2000 | LARGE T&R | Purchase Samples | ||
* Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For higher volume price quotes,prices in local currency or delivery quotes, please contact your local Texas Instruments Sales Office or Authorized Distributor.
| Reported Distributor Inventory as of 12:08 PM GMT, 08 Nov 2009 | |||
| Region | Company | In Stock | Purchase |
| TI Lead Time*: 4 WeeksBQ2085DBT-V1P3 | |||
| Americas | Avnet | 36 | |
| Asia | WPI | 87 | |
| Worldwide | DigiKey | 230 | |
| TI Lead Time*: 4 WeeksBQ2085DBT-V1P3G4 | |||
| Worldwide | DigiKey | Available | |
| TI Lead Time*: 4 WeeksBQ2085DBTR-V1P3 | |||
| Worldwide | DigiKey | Available | |
| TI Lead Time*: 4 WeeksBQ2085DBTR-V1P3G4 | |||
| Asia | WPI | >1k | |
| Worldwide | DigiKey | Available | |
** Lead time information is not available at this time. However, our information is updated daily so please check back with us soon. Please contact your preferred TI Authorized Distributor for additional information.
| Product Content | DPPM / MTBF / FIT Rate | ||||
| Device | Eco Plan* | Lead / Ball Finish | MSL Rating / Peak Reflow | Details | Details |
BQ2085DBT-V1P3  | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-2-260C-1 YEAR | View | View |
| BQ2085DBT-V1P3G4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-2-260C-1 YEAR | View | View |
| BQ2085DBTR-V1P3 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-2-260C-1 YEAR | View | View |
| BQ2085DBTR-V1P3G4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-2-260C-1 YEAR | View | View |
* The planned eco-friendly classification: Pb-Free (RoHS) or Pb-Free (RoHS Exempt) or Green (RoHS & no Sb/Br) - please click on the Product Content Details "View" link in the table above for the latest availability information and additional product content details.
If the information you are requesting is not available online at this time, contact one of our Product Information Centers regarding the availability of this information.
Most useful technical documents for BQ2085-V1P3 
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