TSG27541 Single Cell Battery Gauge with Coulomb Counter
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1. Features
•   Designed  for  single-cell  Li-Ion  and  Li - Polymer batteries.
•  Operates  in  a  voltage  range  of  2.5V to 5.5V.
• Supports  a   1   mΩ  sense   resistor   and accommodates  a  broad  current  spectrum from 1 mA up to 50 A.
•  Optimized for  low  power  consumption, with Sleep and Deep Sleep modes using less than 20 μA and 7 μA respectively.
•  Support internal and external temperature
sensors.
•  Support a fast 400-kHz I2C interface for quick data access and programming.
•  Highly accurate due to dual ADCs that allow for simultaneous current and voltage measurement.
•  Supports a wide variety of lithium cells
•   Auto-tune     the    accuracy     in    wide temperature ranges
•  Lifetime logging data function support
•  Support power mode：

Active mode/Sleep mode/Deep sleep mode


2. Applications
TSG27541 is the equivalent performance and accuracy replacement for the power meter bq27z561, it is the replacement with higher performance and accuracy than bq34z100/bq27541/bq27546/bq27426, it can be Pin to Pin replacement for bq27541/RT9422/SH3660022
• Smart Home (IoT) Device
• Smartphones
• Tablet PC
• Wearable Device
• IP-camera
• Handheld and Portable Applications


3. Description
The TSG27541 is a highly integrated, precise gas gauge designed for 1 -series Li-Ion andLi-Polymer  battery  packs.  It  also supports parallel cells for enhanced capacity.

The TSG27541  communicates  through  an I2C-compatible  interface  and  is  equippedwith  multiple  features  to  ensure  accurate gas    gauging.    Integrated  internal and external  temperature  sensing  options  are included  for  comprehensive  system  and battery temperature monitoring.

An  interrupt function alerts the system of any   state-of-charge   (SOC),   voltage,   or temperature  anomalies.  Additionally,  the device    is    optimized  for     low -voltage
operation,   allowing   continuous   battery monitoring even under deeply discharged  conditions.  In  low -activity  scenarios,  the device can switch to a low -power coulomb
counting (CC) mode, substantially reducing its operating current.


4. Simplified Schematic


5. Pin Configuration and Functions


Pin No.

Pin Name

Pin Type

Pin Function

1

STE

DIO

System Shutdown Enable.


2

NC

/

This pin should be floating on purpose.


3

VBAT

PI

Power supply input.(with 0.1uF capacitor to VSS)


4

VBAT_SNS

AI

Battery voltage sensing positive input. Connect to battery connector with kelvin connection.



5

VDD

PO

Power reference output pin for temperature measurement.


6

VSS

PI

Device ground.


7

SRP

AI

Battery current sensing positive input. Connect a 10mOhm sense resistor with kelvin connection where is near BAT- side.


8

SRN

AI

Battery current sensing negative input. Connect a 10mOhm sense resistor with kelvin connection where is near PACK- side.


9

TS

AI

Temperature measurement input.


10

SDA

DIO,OD

Serial data input. Slave I2C serial communications data line for communication with system. Open -drain I/O.


11

SCL

DIO,OD

Serial cock input. Slave I2C serial communications clock line for communication with system. Open -drain I/O.


12

GPIO

DIO

It's a alternative pin for Serial wire data signal or GPIO.



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