現在提供此產品的更新版本
功能相同,但引腳輸出與所比較的裝置不同
BQ2085
- Provides Accurate Measurement of Available Charge in Li-Ion and Li-Polymer Batteries
- Supports the Smart Battery Specification (SBS) V1.1
- Integrated Time Base Removes Need for External Crystal
- 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 External Components
- Based on a Powerful Low-Power RISC CPU Core With High-Performance Peripherals
- Integrated FLASH Memory Eliminates the Need for External Configuration EEPROM
- Measures Charge Flow Using a High Resolution 16-Bit Integrating Converter
- Better Than 3-nVh of Resolution
- Self-Calibrating
- Offset Error Less Than 1-uV
- Uses 16-Bit Delta Sigma Converter for Accurate Voltage and Temperature Measurements
- Programmable Cell Modeling for Maximum Battery Fuel Gauge Accuracy
- Drives 3-, 4-, or 5-Segment LED Display for Remaining Capacity Indication
- 38-Pin TSSOP (DBT)
- APPLICATIONS
- Notebook PCs
- Medical and Test Equipment
- Portable Instrumentation
The bq2085 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 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, the host controller can manage remaining battery power to extend the system run time as much as possible.
The bq2085 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-uV (typical). For voltage and temperature reporting, the bq2085 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 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 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 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 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 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 from a 3 or 4 series Li-ion cell stack, eliminating the need for an external regulator circuit.
技術文件
設計與開發
如需其他條款或必要資源,請按一下下方的任何標題以檢視詳細頁面 (如有)。
GPCCEDV — 適用於 CEDV 電量計的計量參數計算機
電池組必須使用其中一種以 TI 的 CEDV 演算法為基礎的電量計。可接受 3 對記錄檔案,而這些檔案是使用透過 USB 連接 CEDV 評估板之 TI 的 Battery Management Studio (bqStudio) 軟體建立的。充電和放電需要使用外部設備。若要進行準確的計算,也會需要電池組設定的其他參數。輸出資訊將以包含 CEDV (...)
GAUGEPARCAL — 計量參數計算機
封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
---|---|---|
TSSOP (DBT) | 38 | Ultra Librarian |
訂購與品質
- RoHS
- REACH
- 產品標記
- 鉛塗層/球物料
- MSL 等級/回焊峰值
- MTBF/FIT 估算值
- 材料內容
- 認證摘要
- 進行中持續性的可靠性監測
- 晶圓廠位置
- 組裝地點