My Inquiry
My Account
Texas Instruments BQ79612PAPRQ1
- Part No.:
- BQ79612PAPRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 64-PowerTQFP
- Datasheet:
-
BQ79612PAPRQ1.pdf
- Description:
- AUTOMOTIVE 12-S PRECISION BATTER
- Quantity:
- Payment:
- Shipping:
Inventory:738
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BQ79612PAPRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive battery monitor IC for 12-cell (12S) high-voltage battery modules, delivering ±1.5 mV cell voltage measurement accuracy, integrated hardware-based overvoltage/undervoltage/overtemperature protection, and autonomous 240 mA internal cell balancing - deployed in HEV/EV powertrain BMS stacks requiring ASIL D functional safety compliance.
For engineers reviewing the BQ79612PAPRQ1 datasheet, BQ79612PAPRQ1 pinout, BQ79612PAPRQ1 application, or BQ79612PAPRQ1 equivalent, this device supports daisy-chain isolation via COMHP/COMHN/COMLP/COMLN, UART/SPI host interface bridging through BQ79600-Q1, bus bar sensing (BBP/BBN), and thermal-aware balancing with automatic pause/resume - critical for ISO 26262-compliant BMS design, cell-level diagnostics, and high-reliability EV traction battery monitoring.
Technical Context
The BQ79612PAPRQ1 implements a high-speed, low-latency analog front-end with simultaneous sampling across all 12 cell channels, achieving full-cell voltage acquisition in ≤128 µs using a precision delta-sigma ADC with post-ADC configurable digital low-pass filtering for stable SOC estimation. Its integrated hardware protector operates independently of firmware, enabling deterministic response to OV/UV/OT/UT faults within defined timing windows.
It features dual-domain isolation: capacitive level-shifted differential daisy-chain communication supporting ring topology, and separate analog/digital/power domains (AVDD/AVSS, DVDD/DVSS, CVDD/CVSS, NEG5V) with dedicated LDOIN input for external NPN biasing. Built-in redundancy paths validate voltage and temperature measurements against independent reference paths to satisfy ASIL D systematic capability requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Cell Count Support | 12S (6S–12S configurable); enables compact BMS designs for 48V–60V nominal traction packs. |
| Cell Voltage Accuracy | ±1.5 mV over –40°C to +125°C; ensures <0.01% error in SOC estimation at 4.2 V/cell. |
| Measurement Speed | ≤128 µs for all 12 cells; allows real-time cell balancing control and fast fault detection in dynamic load conditions. |
| Internal Balancing Current | 240 mA per channel with thermal auto-pause/resume; eliminates need for external FETs while preventing local hot spots. |
| Functional Safety Rating | Hardware capability up to ASIL D per ISO 26262; includes documentation for system-level FMEDA and safety analysis. |
| Operating Temperature | –40°C to +125°C ambient (Grade 1); qualified for under-hood and battery pack mounting in automotive environments. |
| Daisy-Chain Interface | Isolated differential COMHP/COMHN/COMLP/COMLN with optional ring architecture; supports >100-device stacks without optocouplers. |
Pinout & Package
Package: HTQFP-64 (PAP), 10.00 mm × 10.00 mm, thermally enhanced quad flat package with exposed thermal pad - optimized for automotive PCB layout, thermal dissipation, and reflow compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BAT | Module top voltage reference | Connects to positive terminal of top cell; serves as primary analog supply and measurement reference point for VC12. |
| VC0–VC12 | Cell voltage sense inputs | Differential inputs for 12S stack (VC0 = bottom cell negative, VC12 = top cell positive); support RC filtering per TI SLUSE81F layout guidelines. |
| CB0–CB12 | Cell balance FET connections | Direct connection points to internal balancing FETs; resistor value sets 240 mA balancing current; require RC filter matching VC pins. |
| BBP / BBN | Bus bar differential input | 5× gain differential channel for measuring bus bar resistance/voltage drop; enables contact resistance monitoring and current path integrity checks. |
| COMHP / COMHN / COMLP / COMLN | Daisy-chain transceiver I/O | Isolated bidirectional differential pairs; COMHP/COMHN = north side, COMLP/COMLN = south side; enable transformer- or capacitor-coupled stack communication. |
| NFAULT | Open-drain fault indicator | Active-low output signaling hardware-detected OV/UV/OT/UT faults; requires external pull-up to CVDD for MCU GPIO interfacing. |
| GPIO1–GPIO8 | Configurable I/O | Support NTC thermistor bias (TSREF), ADC inputs, digital I/O, or SPI master functions; each pin configurable via register map. |
Key Features
| Feature | Design Value |
|---|---|
| ASIL D Hardware Protector | Dedicated analog comparator circuitry for OV/UV/OT/UT detection with fixed thresholds and no firmware dependency - meets diagnostic coverage targets for ASIL D systems. |
| Redundant Diagnostics Path | Independent voltage and temperature measurement paths with cross-check logic; satisfies ISO 26262 requirement for fault detection coverage on safety-critical signals. |
| Post-ADC Digital Filtering | Configurable low-pass filters applied after conversion; suppresses switching noise and improves DC stability for SOC algorithms without external analog filtering complexity. |
| Thermal-Aware Balancing | Automatic pause/resume of balancing based on die temperature; prevents thermal runaway during extended balancing cycles in confined battery enclosures. |
| UART/SPI Bridge Compatibility | Pin- and software-compatible with BQ79600-Q1 bridge IC; enables seamless integration into host MCU interfaces without custom protocol development. |
Applications
| EV Traction Battery Pack Monitoring | 48V Mild Hybrid Powertrain BMS |
|---|---|
Use Scenario: Real-time monitoring of 12S Li-ion modules in rear-axle traction inverters with thermal management integration. IC Role / Device Role / Timing Role: Primary cell voltage, temperature, and bus bar health monitor; executes autonomous balancing and hardware-level fault tripping within <100 µs. Use Value: Enables precise SOC/SOH estimation and failsafe shutdown during cell imbalance or thermal excursion - critical for ISO 26262 ASIL D compliance in propulsion systems. |
Use Scenario: Compact BMS for 48V lithium iron phosphate (LFP) starter-generator systems in P0/P2 mild hybrid architectures. IC Role / Device Role / Timing Role: 12S monitor with integrated protector and daisy-chain stacking; provides redundant voltage validation and bus bar integrity checking via BBP/BBN. Use Value: Reduces BOM count by eliminating discrete comparators and external balancing FETs while meeting AEC-Q100 Grade 1 and ASIL B system requirements. |
| Commercial Vehicle Energy Storage | High-Voltage Battery Module Reference Design |
Use Scenario: Modular 12S–24S scalable energy storage units for electric delivery vans and buses with centralized thermal management. IC Role / Device Role / Timing Role: Stackable monitor node with ring-architecture daisy chain; performs synchronized cell measurements across multi-module strings. Use Value: Supports >100-node stacks with deterministic latency and fault propagation - simplifies certification for commercial fleet battery systems. |
Use Scenario: TI-referenced BMS evaluation platform for automotive OEMs validating cell-level accuracy and functional safety architecture. IC Role / Device Role / Timing Role: Production-grade 12S monitor used in TI's BQ7961x-Q1 EVMs; demonstrates ASIL D-ready hardware design and diagnostic coverage reporting. Use Value: Accelerates ISO 26262 tool qualification and FMEDA validation by providing documented failure modes, FIT rates, and safety manual alignment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ79614PAPRQ1 | 14S support (vs. 12S); identical pinout, package, and firmware interface; adds two extra VC/CB channels. | Required for 14-cell modules (e.g., 60V+ NMC packs); same ASIL D capability and daisy-chain architecture. | Select when scaling to higher voltage stacks without redesigning PCB layout or firmware abstraction layer. |
| MAX17853GTP+ | 16S monitor with integrated 100 mA balancing; different pinout (TQFN-48); no built-in bus bar sensing or ring daisy chain. | Targeted at cost-sensitive industrial BMS; lacks ASIL D documentation and hardware protector redundancy path. | Consider only for non-automotive applications where ISO 26262 compliance is not required and board space is constrained. |
Compared with BQ79612PAPRQ1, the BQ79614PAPRQ1 offers direct scalability to larger stacks with zero layout change, while the MAX17853GTP+ trades ASIL D readiness and diagnostic depth for smaller footprint and lower unit cost - making BQ79612PAPRQ1 optimal for production automotive 12S systems demanding certified functional safety.
Availability
BQ79612PAPRQ1 is available at Aetrix Electronics and suitable for EV traction battery packs, 48V mild hybrid powertrain systems, and commercial vehicle energy storage requiring stable component supply, long-term automotive lifecycle support, and traceable sourcing aligned with IATF 16949 practices.
Supply support for BQ79612PAPRQ1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and automotive ICs, with deep expertise in battery management and functional safety solutions.
The BQ7961x-Q1 product line delivers ASIL D–compliant, stackable battery monitors for high-voltage automotive applications - designed specifically to accelerate ISO 26262 system development and reduce BMS hardware complexity in HEV/EV platforms.
FAQ
What is the maximum supported battery module voltage for BQ79612PAPRQ1?
The BQ79612PAPRQ1 supports total module voltages from 9 V to 80 V in normal operation, covering standard 12S lithium-ion configurations (e.g., 48V nominal with 4.2 V/cell). It maintains full functionality including cell balancing, protection, and daisy-chain communication across this range, with OTP programming enabled above 11 V.
Does BQ79612PAPRQ1 require external balancing FETs?
No, BQ79612PAPRQ1 integrates 12 internal balancing FETs capable of 240 mA per channel. External RC filters set the balancing current, and thermal management logic automatically pauses/resumes balancing to prevent die overheating - eliminating need for discrete MOSFETs and associated gate drivers.
How does BQ79612PAPRQ1 achieve ASIL D compliance?
BQ79612PAPRQ1 achieves ASIL D compliance through hardware-based fault detection (OV/UV/OT/UT comparators), redundant measurement paths, diagnostic coverage reporting, and comprehensive ISO 26262 documentation - including FMEDA reports, safety manuals, and diagnostic test libraries - all validated per AEC-Q100 Grade 1 requirements.
Can BQ79612PAPRQ1 be used in a daisy-chain ring topology?
Yes, BQ79612PAPRQ1 supports optional ring architecture using its isolated differential COMHP/COMHN/COMLP/COMLN pins. This enables fault-tolerant communication where breakage in one link does not isolate downstream devices - a key requirement for high-availability automotive BMS stacks.
What is the purpose of the BBP and BBN pins on BQ79612PAPRQ1?
The BBP and BBN pins provide a dedicated 5× gain differential input channel for measuring voltage drop across bus bars. This enables contact resistance monitoring, weld integrity verification, and current path health assessment - adding a critical layer of system-level diagnostics beyond cell-level monitoring in BQ79612PAPRQ1.
BQ79612PAPRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Functional Safety (FuSa)
- Package/Case:
- 64-PowerTQFP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Battery Monitor
- Battery Chemistry:
- Lithium Ion
- Number of Cells:
- 1
- Fault Protection:
- Over Temperature
- Interface:
- SPI, UART
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 64-HTQFP (10x10)
BQ79612PAPRQ1 FAQ
1.How can I place an order for BQ79612PAPRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ79612PAPRQ1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for BQ79612PAPRQ1 reliable?
The price and inventory of BQ79612PAPRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ79612PAPRQ1 is usually 5 days.
3.What payment methods are accepted for BQ79612PAPRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ79612PAPRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ79612PAPRQ1?
BQ79612PAPRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ79612PAPRQ1 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for BQ79612PAPRQ1?
For technical support, including BQ79612PAPRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ79612PAPRQ1 requirements.
6.How does Aetrix verify that BQ79612PAPRQ1 is sourced from the original manufacturer or authorized distributors?
All BQ79612PAPRQ1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that BQ79612PAPRQ1 meets industry standards.
7.What is the process for return or replacement of BQ79612PAPRQ1?
All BQ79612PAPRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with BQ79612PAPRQ1, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The BQ79612PAPRQ1 part is unused and in its original packaging.
Return procedure for BQ79612PAPRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BQ79612PAPRQ1 Tags
-
BQ29700DSER
Texas Instruments
-
S-8241ABKMC-GBKT2G
ABLIC Inc.
-
S-8241ABPMC-GBPT2G
ABLIC Inc.
-
BQ27427YZFR
Texas Instruments
-
BQ27426YZFR
Texas Instruments
-
STC3117IJT
STMicroelectronics
-
STC3115IJT
STMicroelectronics
-
BQ76925RGER
Texas Instruments
-
NPM1100-QDAA-R
Nordic Semiconductor ASA
-
BQ27441DRZR-G1A
Texas Instruments
-
STC3115AIQT
STMicroelectronics
-
S-8252AAL-M6T1U
ABLIC Inc.
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
