BQ26221 Datasheet | Texas Instruments

SLUS607 - MAY 2004 HIGHĆPERFORMANCE BATTERY MONITOR IC WITH COULOMB COUNTER, VOLTAGE AND, TEMPERATURE MEASUREMENT Features D municates Directly With the Integrated HDQ Engine in TI OMAP Processor D Multifunction Monitoring Integrated Circuit Designed to Work With an Intelligent Host Controller : - Provides State of Charge Information for Rechargeable Batteries - Provides Accurate Battery Voltage and Temperature Measurement D High Accuracy Coulometric Charge and Discharge Current Integration With Automatic Offset pensation D 11-Bit Analog-to-Digital Converter Reports Battery Voltage With Gain and Offset Correction D Differential Current Sense D 32 Bytes of General Purpose RAM D 96 Bytes of Flash (Including 32 Bytes of Shadow Flash) D 8 Bytes of ID ROM D Internal Temperature Sensor Eliminates the Need for an External Thermistor D Programmable Digital Input/Output Port D High-Accuracy Internal Timebase Eliminates External Crystal Oscillator D Low Power Consumption: - Operating : 30 µA - Sleep: 1 µA - Hibernate: 600 n A D Single-Wire HDQ Serial Interface D Packaging: 8-LEAD TSSOP DESCRIPTION The bq26221 is an advanced battery monitoring device designed to accurately measure the charge and discharge currents in rechargeable battery packs. Intended for pack integration, the bq26221 contains all the necessary functions to form the basis of a prehensive battery capacity management system in portable applications such as cellular phones, PDAs, or other portable products. The bq26221 works with the host controller in the portable system to implement the battery management system. The host controller is responsible for interpreting the bq26221 data and municating meaningful battery data to the end-user or power management...