BQ79881-Q1
BQ79881-Q1 is UIR Sensor manufactured by Texas Instruments.
ADVANCE INFORMATION
SLVSJV2
- SEPTEMBER 2025
BQ79881-Q1 UIR Sensor with Pack-Level EIS and Voltage, Current and Insulation Resistance Monitoring in EV/BMS HV Automotive Applications
1 Features
- Two fast pack voltage measurements
- Dedicated single-ended measurements; ASIL-D
- HV Measurement Accuracy <0.4% ; 0.3-5v single ended
- 0u S VI sync within BQ79881; fast 5u S typical
VI Sync with cell measurements
- Accurate Single-Ended Measurements
- Up to 18 single ended ADC inputs; ASIL-D
- HV Measurement Accuracy <0.4%; 0-5V single ended
- Usable as ratiometric temperature sense inputs
- Configurable 1.8V/2.5V/3.3V reference for HV measurements
- Four Current Sense ADCs
- Measure up to two separate currents; ASIL-D
- Input range = +/-275m V differential, +/-750m V mon mode; ASIL-D
- 0.1% accuracy. 10m A (50u Rshunt)
- Over Current parators
- Dedicated fast overcurrent digital parator per CS ADC; ASIL-D
- Response : 100u S to 1m S. Accuracy: 1%
- Thresholds: 0m V to +/-300m V.
- OC response on GPIO pins.
- Majority voting option
- Upgraded Daisy Chain Interface
- 2x parallel SPI ports to MCU to support split chain with single bridge device
- 2-wire isolated interface, SPI to MCU
- 2Mbps single chain/ring, 4Mbps split chain for up to 4x speed improvement
- Closed Loop BCI: 200m A; Open Loop...
