Driver or library
BQ7973X-Q1-DESIGN — BQ7973x-Q1 design resources
BQ7973x-Q1 documentation repository
BQ79731-Q1
Automotive high-voltage battery pack monitor with voltage, current and insulation resistance sensing
Data sheet
BQ79731-Q1
- AEC-Q100 qualified –40°C to +125°C
- Functional safety compliant
- Documentation to aid ISO 26262 system design
- Systematic capability up to ASIL D
- Hardware capability up to ASIL D
- 17 single-ended voltage channels
- High voltage pack, link, charge measurement accuracy update to 0.2%
- Pack and cell VI sync to 64µS
- 2 independent current sense ADCs (BQ79731-Q1)
- ±0.15% gain error drift
- Input range = ±275mV
- 2 Over current detect comparators (BQ79731-Q1)
- ±1% accuracy
- Selectable bi-directional thresholds
- Programmable OC
- Integrated Coulomb counting (BQ79731-Q1)
- 15 GPIO inputs as IO, I2C, SPI, ADC and temp sense
- Dedicated MOSFET switch drive pins
- Intelligent SPI contoller HUB
- Support multiple SPI peripheral devices
- HW pin to trigger contactor drivers and Pyro Fuse drivers
- Stackable and register map compatible with BQ7971x-Q1 cell monitors
The device can be used to measure divided down high voltage nodes in a battery system. It can measure voltage across Fuse, Contactors and check isolation voltage in a battery junction box (BJB) system. The device has two integrated current sense (BQ79731-Q1) paths supporting low-side shunt resistor. Coulomb counting (BQ79731-Q1) function is available for accurate SOC calculation. There are 15 GPIOs/auxiliary inputs that can be used for HV measurements, thermistor measurements, and driving relays. There are four SW outputs that can be used to drive MOSFET switches in the measurement path. The device can function as a SPI HUB and interface with up to eight separate SPI devices/groups. Over current protection response can be achieved autonomously using HW pins for fast protection 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 and UART.
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Driver or library
BQ7973X-Q1-EVALUATION — BQ7973x-Q1 early evaluation files
BQ7973x-Q1 early evaluation files
Supported products & hardware
Products
Battery monitors & balancers
Driver or library
BQ7973X-Q1-FMEDA — BQ7973x-Q1 FMEDA files
BQ7973x-Q1 FMEDA files
Supported products & hardware
Products
Battery monitors & balancers
Driver or library
BQ7973X-Q1-FUNCTIONAL-SAFETY-DOCS — BQ7973x-Q1 functional safety documents
BQ7973x-Q1 functional safety documents
Supported products & hardware
Products
Battery monitors & balancers
Simulation tool
CMSO-3P-BCS — comemso battery cell simulator
The Battery Cell Simulator (BCS) is the core of any test Battery Management System (BMS). It allows the simulation of all required states and faults for the BMS on the cell level.
From: comemso elecronics GmbH
Reference designs
TIDA-010272 — 1500V high-voltage rack monitor unit reference design for energy storage systems
This reference design is a high-voltage, current and insulation impedance accuracy lithium-ion (Li-ion), LiFePO4 battery rack. The design monitors four high-voltage bus inputs, one shunt current and temperature, and one insulation impedance of the battery. The design protects the battery rack to (...)
Design guide: PDF
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| HTQFP (PHP) | 48 | Ultra Librarian |
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