Texas Instruments BQ79606A-Q1 | Demoboard BQ79606EVM-897

Description

The BQ79606A-Q1 device provides simultaneous, high accuracy, channel measurements for three to six battery cells. With the inclusion of a daisy chain communication port, the BQ79606A-Q1 device is stackable (up to 64 devices) to support the large stack configurations found in battery packs for electrified automotive drive trains. Providing a Delta Sigma converter per cell input, the BQ79606A-Q1 allows simultaneous measurement of the battery voltages.The BQ79606A-Q1 includes an auxiliary ADC that supports cell temperature measurements for up to six NTCs as well as internal rails to enable safety checks for the device. A die temperature measurement ADC is also included to provide temperature correction to enable high accuracy results over an extended temperature range.Host communication to the BQ79606A-Q1 device is done via dedicated UART interface. Additionally, an isolated, differential daisy-chain communication interface that supports either capacitor or transformer isolation allows the host to communicate with the entire battery stack. The daisy-chain communication interface can be configured (optional) in a ring architecture that allows the host to talk to devices at either end of the stack in cases of communication line breaks.

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 1 ms (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 150 mA
• Designed to pass BCI testing
• UART Host interface

Typical applications

• Automotive 12-V and 48-V Li-Ion battery systems, E-Bikes, E-Scooters
• Full electric, plug-in hybrid, and hybrid vehicles, Grid storage battery systems, Uninterruptible power supplies (UPS)

More information

• Datasheet
• IC product information