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.
技術文件
設計與開發
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BQ79731Q1EVM-060 — 適用電壓、電流和絕緣電阻監控的 BQ7973x-Q1 評估模組
BQ79731Q1EVM 評估模組 (EVM) 也稱為 BMS060，說明 BQ7973x-Q1 的一般功能、操作理論、硬體設定與使用。這些高度整合的電壓、電流和絕緣電阻監控裝置主要應用在具備進階診斷功能和多種通訊協定的電池接線盒 (BJB) 汽車應用。
BMS060 評估板可在含大型鋰離子電池組應用的系統中判斷潛在裝置使用，以提供監控、系統保護和菊輪鍊通訊。
TIDA-010272 — 適用於儲能系統的 1500V 高電壓機架監測器單元參考設計
此參考設計為高電壓、電流及絕緣阻抗準確度鋰離子 (Li-ion)、LiFePO4 電池架。此設計可監控四個高電壓匯流排輸入、一组分流器電流與溫度以及一個電池絕緣阻抗。此設計可保護電池架，以維持安全運作。此設計提供板載序列週邊介面 (SPI) 和板外菊輪鍊通訊介面，可實現符合成本效益的堆疊式連線與強化型隔離。這些功能讓此參考設計適用於高容量電池架應用。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| HTQFP (PHP) | 48 | Ultra Librarian |
訂購與品質
建議產品可能具有與此 TI 產品相關的參數、評估模組或參考設計。