BQ76PL455A-Q1 Texas Instruments Integrated Circuit (Quad Flat Packages) In Stock
Texas Instruments BQ76PL455A-Q1 is an automotive-grade 16-cell battery monitor and protector IC in a QFP package. Monitors cell voltages and temperatures with 16-bit ADC resolution, supports daisy-chain communication up to 16 devices for large EV battery packs. Available in stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Quad Flat Packages
- Pin Count
- 80
- Lifecycle
- ACTIVE
- Datasheet
- BQ76PL455A-Q1 Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- AEC-Q100 automotive-qualified 16-cell battery monitor with 16-bit ADC resolution for precise cell voltage measurement in EV and HEV battery management systems
- Daisy-chain communication interface supports up to 16 devices (256 cells total) with a single twisted-pair bus, simplifying high-voltage BMS wiring harnesses
- Integrated hardware and software cell overvoltage, undervoltage, and overtemperature protection with configurable thresholds for safe lithium-ion battery operation
Applications
The BQ76PL455A-Q1 is designed for automotive battery management systems in electric vehicles, hybrid electric vehicles, and 48 V mild-hybrid systems requiring AEC-Q100 Grade 1 qualification. It can monitor up to 16 series-connected lithium-ion cells per device, with multiple units daisy-chained to cover 100 V to 400 V battery packs. The device is also used in industrial energy storage systems and grid-scale battery racks where precise cell-level monitoring and protection are required.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for BQ76PL455A-Q1:
Frequently Asked Questions
How many lithium-ion cells can a single BQ76PL455A-Q1 monitor and what ADC resolution is used for voltage measurement?
A single BQ76PL455A-Q1 monitors up to 16 series-connected lithium-ion cells using a 16-bit ADC for cell voltage measurements, providing millivolt-level resolution across each cell's 2 V to 5 V operating range. Multiple devices can be daisy-chained to extend coverage to up to 256 cells total, making it suitable for 400 V automotive traction battery packs with hundreds of series cells.
Which automotive qualification standard does the BQ76PL455A-Q1 meet and what does that mean for EV battery system reliability?
The BQ76PL455A-Q1 meets AEC-Q100 Grade 1 automotive qualification, which requires device-level stress testing at -40 degrees C to 125 degrees C junction temperature and thousands of hours of high-temperature operating life (HTOL). This qualification ensures the IC can withstand the thermal cycling, vibration, and electromagnetic environment inside an EV battery pack over a vehicle lifetime exceeding 10 years or 150,000 miles.
How does the daisy-chain communication architecture of BQ76PL455A-Q1 reduce wiring complexity in a 400 V battery pack design?
The BQ76PL455A-Q1 uses a differential daisy-chain bus that links up to 16 devices monitoring 16 cells each, covering 256 cells total across a 400 V pack using only a single twisted-pair cable. This eliminates the need for individual isolated communication lines to each battery module, reducing harness weight by several kilograms and lowering EMI susceptibility compared to parallel CAN or SPI wiring schemes in large automotive battery enclosures.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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