BQ27421-G1 Datasheet, PDF (2/20 Pages) Texas Instruments – System-Side Impedance Track™ Fuel Gauge With Integrated Sense Resistor

bq27421-G1
SLUSB85 – MAY 2013
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.
DEVICE INFORMATION
AVAILABLE OPTIONS
PART NUMBER
bq27421YZFR-G1A
bq27421YZFT-G1A
bq27421YZFR-G1B
bq27421YZFT-G1B
BATTERY
TYPE
LiCoO₂
(4.2 V max charge)
LiMn₂O₄
(4.3 - 4.35 V max charge)
FIRMWARE
CHEM_ID VERSION
(1)
(2)
0x128
0x312
1.08
(0x0108)
PACKAGE
(3)
CSP-9
COMM.
T_A FORMAT
–40°C to
85°C
I²C
TAPE and
REEL
QUANTITY
3000
250
3000
250
(1) See the CHEM_ID subcommand to confirm the battery chemistry type.
(2) See the FW_VERSION subcommand to confirm the firmware version.
(3) For the most current package and ordering information see the Package Option Addendum at the end of this document; or, see the TI
website at www.ti.com.
THERMAL INFORMATION
θ_JA
θ_JCtop
θ_JB
ψ_JT
ψ_JB
θ_JCbot
THERMAL METRIC⁽¹⁾
Junction-to-ambient thermal resistance
Junction-to-case (top) thermal resistance
Junction-to-board thermal resistance
Junction-to-top characterization parameter
Junction-to-board characterization parameter
Junction-to-case (bottom) thermal resistance
bq27421-G1
YZF(9 PINS)
107.8
0.7
60.4
3.5
60.4
n/a
UNITS
°C/W
(1) For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953
2
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