BQ27520-G2 Datasheet, PDF (4/47 Pages) Texas Instruments – System-Side Impedance Track™ Fuel Gauge With Integrated LDO

bq27520-G2
SLUSAB7A – MARCH 2011 – REVISED AUGUST 2011
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Table 2-1. PIN FUNCTIONS
PIN
NAME
NO.
SRP
A1
SRN
V_SS
V_CC
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 ⁽¹⁾
DESCRIPTION
IA
Analog input pin connected to the internal coulomb counter where SRP is nearest the PACK– connection. Connect to
5-mΩ to 20-mΩ sense resistor.
IA
Analog input pin connected to the internal coulomb counter where SRN is nearest the Vss connection. Connect to
5-mΩ to 20-mΩ sense resistor.
P
Device ground
P
Regulator output and bq27520-G2 processor power. Decouple with 1μF ceramic capacitor to Vss.
P
Regulator input. Decouple with 0.1μF ceramic capacitor to Vss.
O
SOC state interrupts output. Generates a pulse under the conditions specified by Table 5-6. Open drain output.
O
Battery-good indicator. Active-low by default, though polarity can be configured through the [BATG_POL] bit of
Operation Configuration. Push-pull output.
I
Chip Enable. Internal LDO is disconnected from REGIN when driven low.
I
Cell-voltage measurement input. ADC input. Recommend 4.8V maximum for conversion accuracy.
I
Slave I²C serial communications clock input line for communication with system (Master). Use with 10kΩ pull-up
resistor (typical).
I/O
Slave I²C serial communications data line for communication with system (Master). Open-drain I/O. Use with 10kΩ
pull-up resistor (typical).
O
Battery Low output indicator. Active high by default, though polarity can be configured through the [BATL_POL] bit of
Operation Configuration. Push-pull output.
IA
Pack thermistor voltage sense (use 103AT-type thermistor). ADC input.
I/O
Battery-insertion detection input. Power pin for pack thermistor network. Thermistor-multiplexer control pin. Use with
pull-up resistor >1MΩ (1.8 MΩ typical).
(1) I/O = Digital input/output, IA = Analog input, P = Power connection
4
DEVICE INFORMATION
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