BQ27505-J4 Datasheet, PDF (3/38 Pages) Texas Instruments – System-Side Impedance Track™ Fuel Gauge

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2 DEVICE INFORMATION
bq27505-J4
SLVSA40 – DECEMBER 2009
2.1 AVAILABLE OPTIONS
PART NUMBER
FIRMWARE
VERSION
PACKAGE ⁽¹⁾
T_A
COMMUNICATION FORMAT
TAPE & REEL QUANTITY
bq27505YZGR-J4
2.24
CSP-12
–40°C to 85°C
I²C
bq27505YZGT-J4
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.
2.2 DISSIPATION RATINGS
PACKAGE
THERMAL RESISTANCE^{(1) (2)}
POWER RATING
T_A = 25°C
DERATING FACTOR
ABOVE^{(1) (2)} T_A = 25°C
YZG
θ_JA = 89°C/W
θ_JB = 35°C/W
1.1 W
12 mW/°C
(1) Measured with high-K board.
(2) Maximum power dissipation is a function of T_J(max), θ_JA and T_A. The maximum allowable power dissipation at any allowable ambient
temperature is P_D = (T_J(max) – T_A)/ θ_JA.
2.3 PIN ASSIGNMENT
CSP-12
(TOP VIEW)
CSP-12
(BOTTOM VIEW)
A3
B3
C3
D3
D3
C3
B3
A3
A2
B2
C2
D2
D2
C2
B2
A2
A1
B1
C1
D1
D1
C1
B1
A1
Table 2-1. PIN FUNCTIONS
PIN
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
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.
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.
P Device ground
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/O
SOC state interrupts output. Generate a pulse under the conditions specified by Table 5-5. Open drain
output.
I Cell-voltage measurement input. ADC input. Recommend 4.8V maximum for conversion accuracy.
P Processor power input. Decouple with minimum 0.1μF ceramic capacitor.
I/O
Slave I²C serial communications data line for communication with system (Master). Open-drain I/O. Use with
10kΩ pull-up resistor (typical).
I
Slave I²C serial communications clock input line for communication with system (Master). Use with 10kΩ
pull-up resistor (typical).
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
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DEVICE INFORMATION
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