Texas Instruments BQ79606A-Q1 SafeTI™ Precision Monitors
Texas Instruments BQ79606A-Q1 SafeTI™ Precision Monitors offer simultaneous, high-accuracy channel measurements for three to six battery cells. The BQ79606A-Q1 is stackable (up to 64 devices), including a daisy chain communication port, to support the large stack of configurations found in battery packs for electrified automotive drive trains. The BQ79606A-Q1 provides a Delta-Sigma converter per cell input, allowing simultaneous measurement of the battery voltages.
A die temperature measurement ADC is also included on the device, providing temperature correction to enable high-accuracy results over an extended temperature range. A dedicated UART interface enables host communication to the BQ79606A-Q1 device. Additionally, an isolated, differential daisy-chain communication interface that supports capacitor or transformer isolation allows the host to communicate with the entire battery stack. The Texas Instruments BQ79606A-Q1 devices are AEC-Q100 qualified for automotive applications.
Features
- Qualified for automotive applications
- AEC-Q100 Qualified with the following results
- Device temperature grade 2: –40°C to +105°C ambient operating temperature range
- Device HBM ESD classification level 2
- Device CDM ESD classification level C4B
- Voltage monitor, temperature monitor, and communication functions: SafeTI™-26262 ASIL-D compliant
- ±1.1mV Cell voltage measurement accuracy with an offset
- Configurable digital low pass filter as low as 1.2Hz
- Supports simultaneous cell voltage measurements
- Full-accuracy stack measurements in less than 1ms (for 96 cells)
- Optional ring architecture to ensure stack communication even with communication cable break
- Monitors 3 to 6 cell connections and up to 6 NTC/auxiliary channels
- Integrated 16-bit analog-to-digital converters (ADC)
- Integrated high-voltage AFE filter components
- Designed for robust hot-plug performance
- Stackable configuration up to 64 devices (1 base + 63 stack, 384-series cells)
- Isolated differential daisy chain communication
- Supports transformer or capacitor-based isolation
- Configurable SINC3 digital filter
- Integrated hardware protector
- Secondary protection for cell overtemperature and undertemperature
- Secondary protection for cell overvoltage and undervoltage
- Hardware protector function: SafeTI™-26262 ASIL-B compliant
- Integrated cell-balancing MOSFET’s up to 150mA
- Designed to pass BCI testing
- UART Host interface
Applications
- Full electric, plug-in hybrid, and hybrid vehicles
- Automotive 12V and 48V Li-Ion battery systems
- Grid storage battery systems
- Uninterruptible power supplies (UPS)
- E-Bikes, E-Scooters
Simplified System Diagram
Related Development Tool
Texas Instruments bq79606EVM-897 Evaluation Module
Designed to demonstrate the bq79606A-Q1, a SafeTI™ precision monitor with hardware protector.
Published: 2019-11-13
| Updated: 2024-01-30