BQ27620-G1 Datasheet, PDF (2/45 Pages) Texas Instruments – System-Side Impedance Track™ Fuel Gauge

bq27620-G1
SLUSAE3 – OCTOBER 2012
www.ti.com
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
1 INTRODUCTION ......................................... 1
1.1 FEATURES .......................................... 1
1.2 APPLICATIONS ..................................... 1
1.3 DESCRIPTION ...................................... 1
2 DEVICE INFORMATION ................................ 3
2.1 AVAILABLE OPTIONS .............................. 3
2.2 THERMAL INFORMATION .......................... 3
2.3 PIN ASSIGNMENT AND PACKAGE DIMENSIONS 4
3 ELECTRICAL SPECIFICATIONS ..................... 5
3.1 ABSOLUTE MAXIMUM RATINGS .................. 5
3.2 RECOMMENDED OPERATING CONDITIONS ..... 5
3.3 SUPPLY CURRENT ................................. 5
3.4 DIGITAL INPUT AND OUTPUT DC
CHARACTERISTICS ................................ 6
3.5 POWER-ON RESET ................................. 6
3.6 2.5V LDO REGULATOR ............................. 6
3.7 INTERNAL CLOCK OSCILLATORS ................ 6
3.8 ADC (TEMPERATURE AND CELL
MEASUREMENT) CHARACTERISTICS ............ 7
3.9 DATA FLASH MEMORY CHARACTERISTICS ..... 8
3.10 I²C-COMPATIBLE INTERFACE COMMUNICATION
TIMING CHARACTERISTICS ....................... 8
4 GENERAL DESCRIPTION ............................. 9
4.1 DATA COMMANDS ................................ 10
4.2 DATA FLASH INTERFACE ........................ 19
4.3 MANUFACTURER INFORMATION BLOCK ....... 20
4.4 ACCESS MODES .................................. 21
4.5 SEALING/UNSEALING DATA FLASH ............. 21
4.6 DATA FLASH SUMMARY .......................... 22
5 FUNCTIONAL DESCRIPTION ........................ 26
5.1 FUEL GAUGING ................................... 26
5.2 IMPEDANCE TRACK™ VARIABLES .............. 27
5.3 DETAILED PIN DESCRIPTION .................... 29
5.4 TEMPERATURE MEASUREMENT ................ 34
5.5 OVERTEMPERATURE INDICATION .............. 34
5.6 CHARGING AND CHARGE-TERMINATION
INDICATION ........................................ 34
5.7 POWER MODES ................................... 35
6 APPLICATION-SPECIFIC INFORMATION ......... 36
6.1 BATTERY PROFILE STORAGE AND SELECTION
...................................................... 36
7 COMMUNICATIONS ................................... 37
7.1 I²C INTERFACE .................................... 37
7.2 I²C Time Out ....................................... 37
7.3 I²C Command Waiting Time ........................ 38
7.4 I²C Clock Stretching ................................ 38
8 REFERENCE SCHEMATICS ......................... 39
8.1 SCHEMATIC ........................................ 39
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Contents
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