BQ27505-J2 Datasheet, PDF (4/42 Pages) Texas Instruments – System-Side Impedance Track™ Fuel Gauge

bq27505-J2
System-Side Impedance Track™ Fuel Gauge
SLUS924 – APRIL 2009
2.1 PIN ASSIGNMENT
CSP-12
(TOP VIEW)
A3
B3
C3
D3
A2
B2
C2
D2
A1
B1
C1
D1
CSP-12
(BOTTOM VIEW)
D3
C3
B3
A3
D2
C2
B2
A2
D1
C1
B1
A1
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Table 2-1. PIN FUNCTIONS
TERMINAL
NAME
NO.
SRP
A1
SRN
B1
BAT_LOW
C1
Vss
D1
BAT_GD
A2
SOC_INT
B2
BAT
C2
Vcc
D2
SDA
A3
SCL
B3
BI/TOUT
C3
TS
D3
TYPE ⁽¹⁾
IA
IA
O
P
O
I/O
I
P
I/O
I
I/O
IA
DESCRIPTION
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.
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.
Battery Low output indicator. Active high by default, though polarity can be configured through
the [BATL_POL] bit of Operation Configuration. Push-pull output.
Device ground
Battery-good indicator. Active-low by default, though polarity can be configured through the
[BATG_POL] bit of Operation Configuration. Push-pull output.
SOC state interrupts output. Generate a pulse under the conditions specified by Table 5-5. Open
drain output.
Cell-voltage measurement input. ADC input. Recommend 4.8V maximum for conversion
accuracy.
Processor power input. Decouple with minimum 0.1µF ceramic capacitor.
Slave I²C serial communications data line for communication with system (Master). Open-drain
I/O. Use with 10kΩ pull-up resistor (typical).
Slave I²C serial communications clock input line for communication with system (Master). Use
with 10kΩ pull-up resistor (typical).
Battery-insertion detection input. Power pin for pack thermistor network. Thermistor-multiplexer
control pin. Use with pull-up resistor >1MΩ (1.8 MΩ typical).
Pack thermistor voltage sense (use 103AT-type thermistor). ADC input
(1) I/O = Digital input/output, IA = Analog input, P = Power connection
4
DEVICE INFORMATION
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