BQ27425-G1 Datasheet, PDF (2/32 Pages) Texas Instruments – System-Side Impedance Track™ Fuel Gauge With Integrated Sense Resistor

bq27425-G1
SLUSAI6 – NOVEMBER 2011
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
bq27425YZFR-G1
bq27425YZFT-G1
PACKAGE ⁽¹⁾
CSP-15
T_A
–40°C to 85°C
COMMUNICATION
FORMAT
I²C
TAPE and REEL
QUANTITY
3000
250
(1) 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.
PIN DIAGRAM
CSP-15
(TOP VIEW)
CSP-15
(BOTTOM VIEW)
A3 B3 C3 D3 E3
E3 D3 C3 B3 A3
A2 B2 C2 D2 E2
E2 D2 C2 B2 A2
A1 B1 C1 D1 E1
E1 D1 C1 B1 A1
PIN
NAME
NO.
SRX
B1
V_SS
C1
V_CC
D1
REGIN
E1
CE
D2
BAT
E2
SCL
A3
SDA
B3
BIN
C3
GPOUT
NC
A2
A1, B2,
C2, D3,
E3
PIN FUNCTIONS
TYPE ⁽¹⁾
DESCRIPTION
IA
P, IA
P
P
I
I
I
I/O
I
O
Integrated Sense Resistor and Coulomb Counter input typically connected to battery PACK- terminal. For best
performance decouple with 0.1μF ceramic capacitor to Vss.
Device ground and Integrated Sense Resistor termination.
Regulator output and bq27425 processor power. Decouple with 1μF ceramic capacitor to Vss.
Regulator input. Decouple with 0.1μF ceramic capacitor to Vss.
Chip Enable. Internal LDO is disconnected from REGIN when driven low.
Cell-voltage measurement input. ADC input. Recommend 4.8V maximum for conversion accuracy.
Slave I²C serial communications clock input line for communication with system (Master). Use with 10kΩ pull-up
resistor (typical).
Slave I²C serial communications data line for communication with system (Master). Open-drain I/O. Use with 10kΩ
pull-up resistor (typical).
Battery-insertion detection input. A logic high to low transition is detected as a battery insertion event. Recommend
using a pull-up resistor >1MΩ (1.8 MΩ typical) to V_CC for reduced power consumption. An internal pull-up resistor
option is also available using the Operation Configuration[BI_PU_EN] register bit.
General Purpose open-drain output. May be configured as a Battery Low indicator or perform SOC interrupt
(SOC_INT) function.
IA
No Connect.
(1) I/O = Digital input/output, IA = Analog input, P = Power connection
2
Copyright © 2011, Texas Instruments Incorporated