德州儀器推出供電池模組使用的單顆鋰離子電池電量偵側IC BQ27541

　bq27541是一顆針對空間有限的可攜式產品的高準確、獨立的單顆鋰離子及鋰聚合電池電量偵側IC， 它運用了專利的新一代電量偵測技術 “阻抗追蹤” (Impedance Track)以達到優異的準確度，它監控與電池串接的電流感應電阻的壓降以決定電池的充放電動作，針對電池壽命、溫度、自放電以及放電速率所做的補償運用到電量測量以提供在一個寬廣的動作範圍內足夠的電量耗盡時間訊息。

bq27541 只需要少量的系統微控制器韌體開發，它可置放於電池模組內或內建固定式電池模組的系統。bq27541使用的阻抗追蹤(Impedance Track)技術可讓電量偵測器在所有情況下不需學習週期或任何調整就可立刻精確的預測電量，內部暫存器可儲存包括電流、電量、電量耗盡時間、充電狀態、 電池芯溫度及電壓等狀態。bq27541透過HDQ或I2C界面與系統溝通。

bq27541的功能包括:
● HDQ or I2C Communication
● Next Generation Impedance Track Technology measures available charge in Li-Ion and Li-Polymer cells
● Reports Accurate Time-to-Empty At Both Measured and Host-Requested Load Values
● Reports Available Capacity Compensated for Discharge Rate, Temperature, and Age
● End-of-Discharge Voltage Compensated for Discharge Rate and Temperature
● Automatic Capacity Reduction with Age
● Reports Temperature, Voltage, and Current
● High Accuracy Charge and Discharge Current Integration with Automatic Offset Calibration
● Stable Oscillator Without External Components
● Dynamic End-of-Discharge Detection
● Automatic Sleep Mode
● Available in a Small 2.5 mm x 4 mm QFN Package

應用產品:
Smart Phones / PDAs / MP3 Players / Multimedia Players /
Digital Still Cameras / Video Cameras /Handheld Devices

Accessories: Charger / External hard drives / Headsets