bq2060A Datasheet | Texas Instruments

.ti. SLUS500D - OCTOBER 2001 - REVISED OCTOBER 2011 SBS v1.1-pliant Gas Gauge IC Check for Samples: bq2060A Features - Provides Accurate Measurement of Available Charge in Ni Cd, Ni MH, Li-Ion, and Lead-Acid Batteries - Supports SBS Smart Battery Data Specification v1.1 - Supports the 2-Wire SMBus v1.1 Interface With PEC or 1-Wire HDQ16 - Reports Individual Cell Voltages - Monitors and Provides Control to Charge and Discharge FETs in Li-Ion Protection Circuit - Provides 15-Bit Resolution for Voltage, Temperature, and Current Measurements - Measures Charge Flow Using a V-to-F Converter With Offset of Less Than 16 µV After Calibration - Consumes Less Than 0.5 m W Operating - Drives a 4- or 5-Segment LED Display for Remaining Capacity Indication - 28-Pin 150-Mil (3,8-mm) SSOP DESCRIPTION The bq2060A SBS-pliant gas gauge IC for battery pack or in-system installation maintains an accurate record of available charge in rechargeable batteries. The bq2060A monitors capacity and other critical battery parameters for Ni Cd, Ni MH, Li-ion, and lead-acid chemistries. The bq2060A uses a voltage-to-frequency converter with automatic offset error correction for charge and discharge counting. For voltage, temperature, and current reporting, the bq2060A uses an A-to-D converter. The onboard ADC also monitors individual cell voltages in a Li-ion battery pack and allows the bq2060A to generate control signals that may be used with a pack supervisor to enhance pack safety. The bq2060A supports the smart battery data (SBData) mands and charge-control functions. It municates data using the system management bus (SMBus) 2-wire protocol or the Benchmarq 1-wire HDQ16 protocol. The data available include the remaining battery capacity, temperature, voltage, current, and remaining run-time predictions. The bq2060A provides LED drivers and a pushbutton input to depict remaining battery capacity from full to empty in 20% or 25% increments with a 4- or 5-segment...