TI-BQ79606-Q1.pdf
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ADVANCEINFORMATION
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An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. ADVANCE INFORMATION for pre-production products; subject to
change without notice.
bq79606-Q1
SLUSDB1 –MARCH 2018
bq79606-Q1 SafeTI™ Precision Monitor With Integrated Hardware Protector for
Automotive Battery Pack Applications
1
1 Features
1
• 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
• Monitor and Communication Functions: SafeTI™-
26262 ASIL-D Compliant
• Hardware Protector Function: SafeTI™-26262
ASIL-B Compliant
• Highly Accurate Cell Voltage Measurements
• Integrated High-Voltage AFE Filter Components
• Designed for Robust Hot-Plug Performance
• Monitors 3 to 6 Cell Connections and up to 6
NTC/Auxillary Channels
– Integrated 16-bit, 1-MS/s, Analog-to-Digital
Converters (ADC)
• Stackable Configuration up to 51 Devices (1 Base
+ 50 Stack, 300-Series Cells)
• Isolated Differential UART Daisy Chain
communication
– Ring Architecture to Ensure Stack
Communication Even With Communication
Cable breaks
– Supports Transformer or Capacitor based
Isolation
• Supports Simultaneous Cell Voltage
Measurements
– Full-Accuracy Stack Measurements in Less
Than 1 ms (for 96 cells)
• Configurable SINC
3
Digital Filter
• Configurable Digital RC Filter for Accuracy Cell
Measurements
• Integrated Hardware Protector
– Secondary Protection for Cell Overtemperature
and Undertemperature
– Secondary Protection for Cell Overvoltage and
Undervoltage
• Integrated Cell-Balancing MOSFET's up to 150
mA
• Designed to Pass BCI/DPI Testing
• UART Host Interface
2 Applications
• Full Electric, Plug-In Hybrid, and Hybrid Vehicles
• Automotive 12-V and 48-V Li-Ion Battery Systems
• Grid Storage Battery Systems
• Uninterruptible Power Supplies (UPS)
• E-Bikes, E-Scooters
3 Description
The bq79606-Q1 device provides simultaneous, high
accuracy, channel measurements for three to six
battery cells. With the inclusion of a daisy chain
communication port, the bq79606-Q1 device is
stackable (up to 51 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 bq79606-Q1
allows simultaneous measurement of the battery
voltages, providing a true snapshot of the voltage of
the cells.
The bq79606-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.
Device Information
(1)
PART NUMBER PACKAGE BODY SIZE (NOM)
bq79606-Q1 PQFP (48 pin) 7.00 mm × 7.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified System Diagram
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