The BQ79606APHPTQ1 device provides simultaneous, high accuracy, channelmeasurements for three to six battery cells. With the inclusion of a daisy chain communicationport, the BQ79606APHPTQ1 device is stackable (up to 64 devices) tosupport the large stack configurations found in battery packs for electrified automotive drivetrains. Providing a Delta Sigma converter per cell input, the BQ79606APHPTQ1 allowssimultaneous measurement of the battery voltages.
The BQ79606APHPTQ1 includes an auxiliary ADC that supports cell temperaturemeasurements for up to six NTCs as well as internal rails to enable safety checks for the device. Adie temperature measurement ADC is also included to provide temperature correction to enable highaccuracy results over an extended temperature range.
Host communication to the BQ79606APHPTQ1 device is done via dedicated UARTinterface. Additionally, an isolated, differential daisy-chain communication interface thatsupports either capacitor or transformer isolation allows the host to communicate with the entirebattery stack. The daisy-chain communication interface can be configured (optional) in a ringarchitecture that allows the host to talk to devices at either end of the stack in cases ofcommunication line breaks.
Feature
- 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
