BQ2019PW Datasheet, PDF (1/27 Pages) Texas Instruments – ADVANCED BATTERY MONITORIC

bq2019
ADVANCED BATTERY MONITOR IC
SLUS465E – DECEMBER 1999 – REVISED FEBRUARY 2003
D Multifunction Monitoring IC Designed to
Work With an Intelligent Host Controller
– Provides State-of-Charge Information for
Rechargeable Batteries
– Enhances Charge Termination
D Ideal for Single-Cell Li-Ion or 3-Cell NiMH
Applications
D High-Accuracy Coulometric Charge and
Discharge Current Integration With Offset
Calibration
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
description
D Multifunction Digital Output Port
D High-Accuracy Internal Timebase
Eliminates External Crystal Oscillator
D Low Power Consumption
– Operating: <80 µA
– Sleep: <1.5 µA
D Single-Wire HDQ Serial Interface
D Packaging: 8-Lead TSSOP
PW PACKAGE
(TOP VIEW)
REG
1
V_CC
2
V_SS
3
HDQ
4
8 STAT
7
SR
6
DC
5 OSC
DC – Internal connection only. Do not connect
The bq2019 advanced battery-monitoring IC accurately measures the charge and discharge currents in a
rechargeable battery pack. In pack integration, the bq2019 is the basis of a comprehensive battery-capacity
management system in portable applications such as cellular phones, PDAs, or other portable products.
The bq2019 works with the host controller in the portable system to implement the battery management system.
The host controller interprets the bq2019 data and communicates meaningful battery data to the end-user or
power-management system.
The bq2019 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 when the battery is
temporarily shorted or deeply discharged.
AVAILABLE OPTIONS
PACKAGED DEVICE
TA
MARKING
8-LEAD TSSOP
(PW)
–20°C to 70°C
bq219
bq2019PW
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.
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.
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright  2003, Texas Instruments Incorporated
1