Datasheet
V
SS
SRN
SRP
V
CC
HDQ
SDA
SCL
1
2
3
4
5
6
12
11
10
9
8
7
TS
REGIN
BAT
SE
REG25
bq27541
bq27541-G1
SLUSAL6C –NOVEMBER 2011–REVISED OCTOBER 2012
www.ti.com
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
DEVICE INFORMATION
AVAILABLE OPTIONS
PRODUCTION COMMUNICATION TAPE AND REEL
PACKAGE
(2)
T
A
PART NO.
(1)
FORMAT QUANTITY
bq27541DRZR-G1 3000
12-pin, 2.5-mm × 4-mm SON –40°C to 85°C I
2
C, HDQ
(1)
bq27541DRZT-G1 250
(1) bq27541-G1 is shipped in I
2
C mode
(2) 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.
bq27541 PIN DIAGRAM
(TOP VIEW)
PIN FUNCTIONS
PIN
TYPE
(1)
DESCRIPTION
NAME NO.
BAT 4 I Cell-voltage measurement input. ADC input. Decouple with 0.1μF capacitor.
REG25 2 P 2.5V output voltage of the internal integrated LDO. Connect a minimum 0.47μF ceramic capacitor.
REGIN 3 P The input voltage for the internal integrated LDO. Connect a 0.1μF ceramic capacitor.
SCL 11 I Slave I
2
C serial communications clock input line for communication with system (Slave). Open-drain I/O.
Use with 10kΩ pull-up resistor (typical).
SDA 10 I/O Slave I
2
C serial communications data line for communication with system (Slave). Open-drain I/O. Use
with 10kΩ pull-up resistor (typical).
SE 1 O Shutdown Enable output. Push-pull output. Leave Floating when it is not used.
HDQ 12 I/O HDQ serial communications line (Slave). Open-drain. Use with 10kΩ pull-up resistor (typical) or leave
floating when it is not used.
SRN 8 IA Analog input pin connected to the internal coulomb counter with a Kelvin connection where SRN is
nearest the PACK- connection. Connect to 5-mΩ to 20-mΩ sense resistor.
SRP 7 IA Analog input pin connected to the internal coulomb counter with a Kelvin connection where SRP is
nearest the CELL- connection. Connect to 5-mΩ to 20-mΩ sense resistor
TS 9 IA Pack thermistor voltage sense (use 103AT-type thermistor). ADC input
Vcc 5 P Processor power input. The minimum 0.47μF capacitor connected to REG25 should be close to Vcc.
Vss 6 P Device ground
(1) I/O = Digital input/output, IA = Analog input, P = Power connection
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Product Folder Links: bq27541-G1