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BQ79826-Q1-DESIGN — BQ79826-Q1 design resources
BQ79826-Q1 Document Repository
BQ79881-Q1
Monitor de caja de conexiones de batería automotriz con espectroscopía de impedancia electroquímica
Hoja de datos
BQ79881-Q1
- Two fast pack voltage measurements
- Dedicated single-ended measurements; ASIL-D
- HV Measurement Accuracy <0.4% ; 0.3-5v single ended
- 0uS VI sync within BQ79881; fast 5uS 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 = +/-275mV differential, +/-750mV common mode; ASIL-D
- 0.1% accuracy. 10mA (50u Rshunt)
- Over Current Comparators
- Dedicated fast overcurrent digital comparator per CS ADC; ASIL-D
- Response : 100uS to 1mS. Accuracy: 1%
- Thresholds: 0mV to +/-300mV.
- 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: 200mA; Open Loop BCI: 300mA
- Isolation: Transformer or capacitor-only
- FDTI Time: <100ms for 800V packs or 250 cells
- Support for ring architecture
- Reverse wakeup available without ring architecture
- Smart EIS Engine
- Integrated Electrochemical Impedance Spectroscopy measurement engine
- Impedance Accuracy: 1% with 1A excitation, >200uΩ impedance
- Excitation frequency: 0.01Hz – 3.5kHz
- < 5us I/V synchronization from device to device
- Support for global excitation
- Other
- 12V switch drive pins to drive NMOSFET or Opto-MOS switches
- Package: 48-pin QFN, 0.5mm pitch
- Meets AEC-Q100 and ISO26262 ASIL-D Functional Safety
-
- Power Consumption
- Active mode: < 100mW
- Sleep mode: < 0.5mW
- Deep sleep mode: < 0.05mW
- Power Consumption
The device can be used to measure divided down high voltage nodes in a battery system. It can measure voltages across Fuses and Contactors, and it can check isolation voltages in battery junction box (BJB) systems. The device has four integrated current sense paths supporting low side shunt resistors. Coulomb counting is available for accurate SOC calculation. There are 18 GPIOs/auxiliary inputs that can be used for HV measurements, thermistor measurements and driving relays. There are 4 SW outputs that can be used to drive MOSFET switches in the measurement path. The device can function as a SPI and I2C HUB and interface with up to 8 separate SPI devices/groups. Over current protection response can be achieved autonomously using OC Pins for fast reaction in dangerous over current events. The isolated bi-directional daisy chain ports support both capacitor and transformer based isolation. The device can also communicate with MCU over SPI.
Documentación técnica
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Ver todo 4
| Documentación principal | Tipo | Título | Opciones de formato | Fecha |
|---|---|---|---|---|
| * | Data sheet | BQ79881-Q1 UIR Sensor with Pack-Level EIS and Voltage, Current and Insulation Resistance Monitoring in EV/BMS HV Automotive Applications datasheet | PDF | HTML | 24 sep 2025 |
| White paper | 採用電化學阻抗光譜的新一代電池監控 (Rev. A) | PDF | HTML | 09 jun 2026 | |
| White paper | 전기 화학 임피던스 분광법을 사용한 차세대 배터리 모니터링 (Rev. A) | PDF | HTML | 09 jun 2026 | |
| White paper | Next-Generation Battery Monitoring With Electrochemical Impedance Spectroscopy (Rev. A) | PDF | HTML | 03 jun 2026 |
Diseño y desarrollo
Para conocer los términos adicionales o los recursos necesarios, haga clic en cualquier título de abajo para ver la página de detalles cuando esté disponible.
Controlador o biblioteca
BQ79881-Q1-DESIGN — BQ79881-Q1 design resources
BQ79881-Q1 documentation repository
Productos y hardware compatibles
Controlador o biblioteca
BQ79881-Q1-FS — Functional Safety documentation for BQ79881-Q1
This secure folder stores Functional Safety document for BQ79881-Q1
Productos y hardware compatibles
Controlador o biblioteca
EIS-BQ798XX-Q1-DESIGN — BQ798XX-Q1 Electrochemical Impedance Spectroscopy Design resources
EIS design secure folder for BQ798XX-Q1
Productos y hardware compatibles
| Encapsulado | Pines | Símbolos CAD, huellas y modelos 3D |
|---|---|---|
| HTQFP (PHP) | 48 | Ultra Librarian |
Pedidos y calidad
Información incluida:
- RoHS
- REACH
- Marcado del dispositivo
- Acabado de plomo/material de la bola
- Clasificación de nivel de sensibilidad a la humedad (MSL)/reflujo máximo
- Estimaciones de tiempo medio entre fallas (MTBF)/fallas en el tiempo (FIT)
- Contenido del material
- Resumen de calificaciones
- Monitoreo continuo de confiabilidad
Información incluida:
- Lugar de fabricación
- Lugar de ensamblaje
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Soporte y capacitación
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