BQ27Z758 Impedance Track Technology Battery Gas Gauge and Protection Solution
for 1-Series Cell Li-Ion Battery Packs

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