BQ27Z558
SLUSFF9 – NOVEMBER 2023
BQ27Z558 Impedance Track™ Battery Gas Gauge Solution
for 1-Series Cell Li-Ion Battery Packs, with 1.2-V IO Support
1 Features
3 Description
•
Supports high-side and low-side current sense
resistors down to 1 mΩ
The Texas Instruments BQ27Z558 Impedance Track™
gas gauge solution is a highly integrated, accurate
1-series cell gas gauge with a flash programmable
custom reduced instruction-set CPU (RISC) and
SHA-256 authentication for Li-ion and Li-polymer
battery packs. The 1-series cell capability includes
parallel cells for increased capacity.
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Supports pack-side gauging including enhanced
state of health (SOH) algorithm
Fast QMax update option based on predicted OCV
SHA-256 authentication responder for increased
battery pack security
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Sophisticated charge algorithms
– JEITA
– Enhanced charging
– RSOC() charging compensation option
Two independent ADCs
– Support for simultaneous current and voltage
sampling
– High-accuracy coulomb counter with input
offset error < 1 µV (typical)
The BQ27Z558 gas gauge communicates through
I2C-compatible and HDQ one-wire interfaces and
includes several key features that can help facilitate
accurate gas gauging applications. Integrated
temperature sense functions (internal and external
options) enable system and battery temperature
measurements.
•
Device Information
PACKAGE SIZE
PART NUMBER(1)
PACKAGE
DSBGA (12)
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•
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Low-voltage (2-V) operation
(NOM)
Wide-range current applications (1 mA to > 5 A)
Active high or low pulse or level interrupt pin
Supports battery trip point (BTP)
Reduced power modes (typical battery pack
operating range conditions)
BQ27Z558
1.67 mm × 2.05 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
= Recommended for IEC ESD
1
= Optional alternate connection
2
– Typical SLEEP mode: < 11 μA
Highside Protection
PACKP
C5
0.1 ꢁF
– Typical DEEP SLEEP mode: < 9 μA
– Typical HIBERNATE mode: < 3 μA
– Typical OFF mode: < 1.9 μA
1
R1
10 ꢀ
1
C4
0.1 ꢁF
BAT
C1
1.0 uF
PACKN
R2
1 Kꢀ
1
BAT_SNS
1
•
•
Internal and external temperature sense functions
Diagnostic lifetime data monitor and black box
recorder
INT
INT
CELLP
Li-Ion
Cell
R2
1 Kꢀ
PULS
CE
TS
PULS
CE
2
R9
100 ꢀ
SCL
SDA
•
400-kHz I2C bus communications interface,
including a 1.2-V logic level for high-speed
programming and data access
SCL
C2
0.1 ꢁF
RT1
103AT
CELLN
SDA/HDQ
R8
100 ꢀ
VSS
SRP
SRN
GND
C3
0.1 ꢁF
•
•
HDQ one-wire for communication with host
Compact 12-pin DSBGA package (YPH)
R3
1mꢀœ
10mꢀ
Lowside Protection
PACKN
2 Applications
Simplified Schematic
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Smartphones
Digital still cameras and video cameras
Tablet computing
Portable and wearable health devices
Portable audio devices
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
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