BQ78709-Q1
- AEC-Q100 Qualified for automotive applications
- Functional Safety Compliant
- Systematic Capability up to ASIL B / SIL 2
- Hardware Capability up to ASIL B / SIL 2
- Battery and supercap monitoring capability for 2-series to 7-series cells
- Integrated low-side drivers for NFET protection with optional autonomous recovery
- Extensive protection suite including voltage, temperature, current, and internal diagnostics
- 16-bit
delta-sigma voltage ADC
- High accuracy cell voltage measurement of 1mV (typical)
- Dedicated 16- or 24-bit delta-sigma coulomb counter ADC
-
- High-accuracy current measurement with low input offset error
- Wide-range current applications (±200mV measurement range across sense resistor)
- 48bit accumulated charge integrator with timer
- Host-controlled cell balancing
- Multiple power
modes (typical battery pack operating range conditions)
- NORMAL mode (with Coulomb counting): 32µA to 175µA
- SLEEP mode (with protections active): 6µA
- DEEPSLEEP mode: 2.7µA
- SHUTDOWN mode: <1µA
- Supply voltage from 3V to 38.5V
- High-voltage tolerance of 45V on cell connect and select additional pins
- Support for temperature sensing using an internal sensor and an external thermistor
- Integrated one-time-programmable (OTP) memory for device settings, programmed by TI
- 400kHz I2C serial communications with optional CRC support
- Programmable LDO for external system usage
- 20-pin QFN (RGR) package
The Texas Instruments BQ78709-Q1 provides a highly integrated, high-accuracy battery monitor and protector for 2-series to 7-series Li-ion, Li-polymer, LiFePO4 (LFP), and LTO battery packs and supercaps. The device includes a high-accuracy monitoring system with a dedicated coulomb counter and accumulated charge integration, a highly configurable protection subsystem, and support for host-controlled cell balancing. Integration includes low-side protection NFET drivers, a programmable LDO for external system use, and an I2C host communication interface supporting up to 400kHz operation with optional CRC. Continuous Coulomb counting is available in multiple power modes ranging down to 32µA. The BQ78709-Q1 operates over a supply voltage from 3V to 38.5V and is available in a 20-pin QFN package.
技術文件
| 重要文件 | 類型 | 標題 | 格式選項 | 下載最新的英文版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 資料表 | BQ78709-Q1 2-Series to 7-Series High Accuracy Automotive Battery Monitor and Protector for Li-Ion, Li-Polymer, LiFePO4 (LFP), and LTO Battery Packs and Supercaps datasheet | PDF | HTML | 2026/5/6 |
設計與開發
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BQ76907EVM — 適用於低功耗監控器和保護器的 BQ76907 評估模組
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| VQFN (RGR) | 20 | Ultra Librarian |