1 Features
• Integrated battery gas gauge and protector
• Flash-programmable custom BQBMP RISC CPU
– SHA-256 authentication
– 400kHz I2C bus communications interface
• Low-voltage (2.0V) operation
• Zero volt charging with no inhibit (ZVCHG) for
systems with secondary protectors
• Two independent precision 16-bit ADCs
– Coulomb counting ADC with current sense
resistor down to 1mΩ
– Voltage ADC for cell voltage and external
andinternal temperature sensors
• Battery fuel gauging based on patented
Impedance Track™ technology
– Models battery discharge curve for accurate
time-to-empty predictions
– Automatically adjusts for aging, temperature,
and rate-induced effects on the battery
• Battery Kelvin sense differential analog output pins
with built-in protection
• High-side or low-side current sensing
• Programmable hardware-based protection
– High-side FET gate drivers
– Overvoltage and undervoltage (OVP and UVP)
– Overcurrent in discharge and overcurrent in
charge (OCD and OCC)
– Short circuit in discharge (SCD)
– Firmware-based overtemperature (OT)
• Reduced typical power modes
– SLEEP mode: 20μA
– SHIP mode: 10μA
– SHELF mode 5μA
– SHUTDOWN mode: 0.2μA
• Ultra-compact, 15-ball NanoFree™ DSBGA

2 Applications
• Any end equipment with 1-series rechargeable
batteries:
– Smartphones
– Tablets
– Cameras
– Portable wearables/medical
– Industrial handhelds

3 Description
The Texas Instruments BQ27Z758 Impedance Track™
gas gauge solution is a highly integrated, accurate
1-series cell gas gauge and protection solution.
The BQ27Z758 device provides a fully integrated
pack-based solution with a flash programmable
custom reduced instruction-set CPU (RISC), safety
protection, differential battery sensing analog output,
and authentication for 1-series cell Li-ion and Lipolymer
battery packs.
The BQ27Z758 gas gauge communicates through
an I2C compatible interface and combines an ultralow
power TI BQBMP processor, high accuracy
analog measurement capabilities, integrated flash
memory, N-CH high-side FET drive, and a SHA-2
Authentication transform responder into a complete,
high-performance battery management solution.