Firmware
BQ41Z90
3 to 16 series Li-ion highly integrated battery fuel gauge, monitor and protector
Data sheet
BQ41Z90
- 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
The Texas Instruments BQ41Z90 is a fully integrated pack-based battery pack manager solution, that provides a flash programmable CPU, safety protection, and elliptical curve cryptography (ECC) authentication for 3 to 16 cells in series Li-ion, LiFeP4, NiMH, and Li-polymer battery packs.
The BQ41Z90 battery pack manager communicates through SMBus v3.2 or I2C-compatible interfaces, and combines an ultra-low-power, high-speed 32-bit processor, high-accuracy analog measurement capabilities, integrated flash memory, an array of peripheral IO, an NMOS protection FET drive, and a SHA-1, SHA-2, or EC-KCDSA authentication responder into a complete, high-performance battery management solution.
Technical documentation
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View all 3 | Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | BQ41Z90 Highly Integrated 3–16 Cell Battery Fuel Gauge with IT-DZT Algorithm and ECC Authentication datasheet (Rev. A) | PDF | HTML | 21 Dec 2024 |
| EVM User's guide | BQ41Z90 Li-Ion Battery Pack Manager Evaluation Module | PDF | HTML | 03 Dec 2024 | |
| User guide | BQ41z90 Technical Reference Manual | 12 Sep 2024 |
Design & development
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Evaluation board
BQ41Z90EVM — BQ41Z90 evaluation module
The BQ41Z90EVM is a complete system for evaluating the functionality of the BQ41Z90 fuel gauge. This gauge is appropriate for applications powered by multicell battery systems up to 16 cells in series. The evaluation module (EVM) includes one BQ41Z90 circuit module, a current-sense resistor and (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| HTQFP (PVP) | 64 | Ultra Librarian |
Ordering & quality
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