BQ27520YZFR-G4 Datasheet, PDF (3/19 Pages) Texas Instruments – System-Side Impedance Track Fuel Gauge With Integrated LDO

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PIN ASSIGNMENT AND PACKAGE DIMENSIONS
bq27520-G4
SLUSB20 – NOVEMBER 2012
(TOP VIEW)
(BOTTOM VIEW)
A3
B3
C3
D3
E3
E3
D3
C3
B3
A3
xxxx^A2
B2
A1
B1
Pin A1
C2
C1
D2
D1
E2
E1
Index Area
D
E2
D2
C2
B2
A2
E1
D1
C1
B1
A1
DIM
MIN
D
2580
E
1926
TYP
2610
1956
MAX
2640
1986
UNITS
m
Table 1. PIN FUNCTIONS
PIN
NAME
NO.
SRP
A1
SRN
V_SS
V_CC
REGIN
SOC_INT
BAT_GD
B1
C1, C2
D1
E1
A2
B2
CE
D2
BAT
E2
SCL
A3
SDA
B3
BAT_LOW
C3
TS
D3
BI/TOUT
E3
TYPE ⁽¹⁾
DESCRIPTION
IA
Analog input pin connected to the internal coulomb counter with a Kelvin connection 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 with a Kelvin connection where SRN is nearest the Vss
connection. Connect to 5-mΩ to 20-mΩ sense resistor.
P
Device ground
P
Regulator output and bq27520-G4 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 ⁽¹⁾. Open drain output.
O
Battery Good push-pull indicator output. Active-low and output disabled by default. Polarity is configured via Op
Config [BATG_POL] and the output is enabled via OpConfig C [BATGSPUEN].
I
Chip Enable. Internal LDO is disconnected from REGIN when driven low. Note: CE has an internal ESD protection
diode connected to REGIN. Recommend maintaining V_CE ≤ V_REGIN under all conditions.
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). Open-drain I/O. 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 push-pull output indicator. Active high and output enabled by default. Polarity is configured via Op
Config [BATL_POL] and the output is enabled via OpConfig C [BATLSPUEN].
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
Copyright © 2012, Texas Instruments Incorporated
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