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BQ79606APHPTQ1

6-S automotive precision battery monitor, balancer and integrated protector with ASIL-D compliance

Manufacturer:

Texas Instruments, Inc
Mfr.Part #:

BQ79606APHPTQ1
Datasheet:

BQ79606APHPTQ1 Datasheet (PDF)
Series:

Automotive, AEC-Q100, Functional Safety (FuSa)
Function:

Battery Monitor
Battery Chemistry:

Lithium Ion
Number of Cells:

3 ~ 6
EDA/CAD Models:

Request Free CAD Models for BQ79606APHPTQ1

Email: [email protected]

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BQ79606APHPTQ1 General 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.

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Key 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

Specifications

Category	Integrated Circuits (ICs)Power Management (PMIC)Battery Management	Series	Automotive, AEC-Q100, Functional Safety (FuSa)
Function	Battery Monitor	Battery Chemistry	Lithium Ion
Number of Cells	3 ~ 6	Fault Protection	Over Temperature, Over/Under Voltage
Interface	SPI, UART	Operating Temperature	-40°C ~ 105°C (TA)
Mounting Type	Surface Mount	Base Product Number	BQ79606