BQ79606A-Q1 Texas instruments

BQ79606A-Q1

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BQ79606A-Q1

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Описание

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.

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

Number of series cells (min)	3
Vin (max) (V)	33
Features	Cell balancing, Integrated ADC, Multi-cell support, Open-wire detection, Overtemperature protection, Overvoltage protection, Separate MCU requirement, Stackable (built-in interface), Temperature sensing, Undertemperature protection, Undervoltage protection
Device type	Cell monitor and balancer
Number of series cells (max)	6
Operating temperature range (°C)	-40 to 105
Rating	Automotive
Battery overvoltage protection (min) (V)	2
Battery overvoltage protection (max) (V)	5
TI functional safety category	Functional Safety-Compliant
Communication interface	Differential Daisy Chain, UART
Operating current (typ) (µA)	4200