BQ41Z90 Highly Integrated 3–16 Cell Battery Fuel Gauge with IT-DZT Algorithm and ECC Authentication

1 Features

Highly integrated battery pack manager for 3 to 16 cells in series applications
- Ultra-low power 32-bit RISC processor
- ADC measurements for up to 16 cells in series with 80V tolerance
- High Accuracy SoC and SoH with Dynamic Z Track™ gauging algorithm
- Certificate-based security protected flash memory
Precision analog front end with two independent ADCs:
- High-accuracy 18-bit integrating delta-sigma coulomb counter
- High-accuracy 16-bit delta-sigma with input translation and multiplexer
- Support for simultaneous current and voltage sampling
- Supports up to eight external thermistor measurements and an internal temperature sensor
Strong High-side NMOS FET drive with fast turn-on and turn-off time
Charge pump support for pre-charge and pre-discharge NMOS FET drivers
Parallel configuration support for removable battery with separate charger and system ports
Cell balancing support up to 50mA bypass per cell
Diagnostic lifetime data monitor and recorder
Multiple host communication support:
- I²C (up to 1MHz )
- SMBus 3.2 (up to 1MHz)
Multiple power modes for low quiescent current operation
SHA-1, SHA-2, or EC-KCDSA authentication for robust battery pack security