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BQ26221 Datasheet(PDF) 1 Page - Texas Instruments |
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BQ26221 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 20 page bq26221 SLUS607 − MAY 2004 HIGHPERFORMANCE BATTERY MONITOR IC WITH COULOMB COUNTER, VOLTAGE AND, TEMPERATURE MEASUREMENT 1 www.ti.com FEATURES D Communicates 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 Compensation 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 nA 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 comprehensive 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 communicating meaningful battery data to the end-user or power management system. This device provides 64 bytes of general-purpose flash memory, 8 bytes of ID ROM and 32 bytes of flash-backed RAM for data storage. The nonvolatile memory can maintain formatted battery monitor information, identification codes, warranty information, or other critical battery parameters during periods when the battery is temporarily shorted or deeply discharged. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright 2004, Texas Instruments Incorporated Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 1 2 3 4 8 7 6 5 RBI VCC VSS HDQ GPIO SRP SRN BAT PW PACKAGE (TOP VIEW) |
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