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BQ27520-G3 Datasheet, PDF (4/47 Pages) Texas Instruments – System-Side Impedance Track™ Fuel Gauge With Integrated LDO | |||
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bq27520-G3
SLUSAP0 â DECEMBER 2011
PIN
NAME
NO.
SRP
A1
SRN
VSS
VCC
REGIN
SOC_INT
BAT_GD
CE
BAT
SCL
B1
C1, C2
D1
E1
A2
B2
D2
E2
A3
SDA
B3
BAT_LOW
C3
TS
D3
BI/TOUT
E3
TYPE
IA
IA
P
P
P
O
O
I
I
I
I/O
O
IA
I/O
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Table 2-1. PIN FUNCTIONS
DESCRIPTION
Analog input pin connected to the internal coulomb counter with a Kelvin connection where SRP is nearest the
PACKâ connection. Connect to 5-m⦠to 20-m⦠sense resistor.
Analog input pin connected to the internal coulomb counter with a Kelvin connection where SRN is nearest the Vss
connection. Connect to 5-m⦠to 20-m⦠sense resistor.
Device ground
Regulator output and bq27520-G3 processor power. Decouple with 1μF ceramic capacitor to Vss.
Regulator input. Decouple with 0.1μF ceramic capacitor to Vss.
SOC state interrupts output. Generates a pulse under the conditions specified by Table 5-6. Open drain output.
Battery-good indicator. Active-low by default, though polarity can be configured through the [BATG_POL] bit of
Operation Configuration. Push-pull output.
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). Open-drain I/O. Use with
10k⦠pull-up resistor (typical).
Slave I2C serial communications data line for communication with system (Master). Open-drain I/O. Use with 10kâ¦
pull-up resistor (typical).
Battery Low output indicator. Active high by default, though polarity can be configured through the [BATL_POL] bit of
Operation Configuration. Push-pull output.
Pack thermistor voltage sense (use 103AT-type thermistor). ADC input.
Battery-insertion detection input. Power pin for pack thermistor network. Thermistor-multiplexer control pin. Use with
pull-up resistor >1M⦠(1.8 M⦠typical).
4
DEVICE INFORMATION
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Copyright © 2011, Texas Instruments Incorporated
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