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Texas Instruments BQ79614PAPRQ1
- Part No.:
- BQ79614PAPRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 64-PowerTQFP
- Datasheet:
-
BQ79614PAPRQ1.pdf
- Description:
- AUTOMOTIVE 14-S PRECISION BATTER
- Quantity:
- Payment:
- Shipping:
Inventory:853
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Product details
Overview
BQ79614PAPRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive battery monitor IC for 6S–14S high-voltage battery modules, delivering ±1.5 mV cell voltage measurement accuracy, 128 µs full-channel conversion time, and integrated hardware-based overvoltage/undervoltage/overtemperature protection. It supports autonomous 240 mA internal cell balancing with thermal pause/resume control and daisy-chain isolation for BMS in HEV/EV powertrain systems.
For engineers reviewing the BQ79614PAPRQ1 datasheet, BQ79614PAPRQ1 pinout, BQ79614PAPRQ1 application, or BQ79614PAPRQ1 equivalent, this page provides verified functional safety (ASIL D) compliance, HTQFP-64 package mapping, real-world BMS integration constraints, and validated alternatives for 14-cell monitoring platforms requiring ISO 26262 system design support.
Technical Context
The BQ79614PAPRQ1 implements a dual-path ADC architecture with built-in redundancy for voltage and temperature diagnostics, enabling simultaneous cell voltage and bus bar (BBP/BBN) measurements at 5× gain. Its post-ADC configurable digital low-pass filters produce DC-like outputs optimized for SOC estimation.
It operates across –40°C to +125°C ambient, supports isolated differential daisy-chain communication (with optional ring topology), and integrates a SPI master plus UART/SPI bridge compatibility via BQ79600-Q1 - all while maintaining pin-package and software compatibility within the BQ7961X-Q1 family.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Cell Count Support | 6S to 14S battery modules - enables flexible pack configuration without redesigning PCB layout or firmware. |
| ADC Accuracy | ±1.5 mV - ensures precise state-of-charge (SOC) and state-of-health (SOH) calculation under automotive thermal stress. |
| Full-Channel Conversion Time | 128 µs - allows rapid fault detection and real-time balancing decisions in fast-transient EV operating conditions. |
| Cell Balancing Current | 240 mA - delivers effective passive balancing for Li-ion cells without external FETs or thermal runaway risk. |
| Functional Safety Rating | Hardware and systematic capability up to ASIL D - meets ISO 26262 requirements for safety-critical BMS subsystems. |
| Operating Temperature | –40°C to +125°C ambient - qualified per AEC-Q100 Grade 1 for under-hood and traction battery applications. |
| Daisy-Chain Interface | Isolated differential with COMHP/COMHN/COMLP/COMLN - eliminates ground loops and supports >10-device stacks with transformer or capacitive isolation. |
Pinout & Package
Package: 64-pin HTQFP (PAP), 10.00 mm × 10.00 mm, thermally enhanced for automotive under-hood environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BAT | Module top-rail supply & sense input | Connects to highest cell's positive terminal; serves as reference for all VC/CB inputs and powers internal LDO chain. |
| VC0–VC14 | Cell voltage sense inputs | Differential inputs for 15 cells (VC0 = bottom of Cell 1; VC14 = top of Cell 14); require RC filtering per TI layout guidelines. |
| CB0–CB14 | Cell balance FET connections | Drive internal 240 mA balancing FETs; resistor on CBn sets current; unused pins tied to BAT per datasheet instructions. |
| BBP / BBN | Bus bar differential measurement | 5× gain differential input for shunt-based current sensing; enables direct integration with bus bar current monitoring. |
| COMHP / COMHN / COMLP / COMLN | Daisy-chain transceiver I/O | Vertical bidirectional interface supporting stackable multi-device configurations with optional ring architecture. |
| NFAULT | Active-low fault indicator | Asserted on OV/UV/OT/UT/communication faults; connects directly to MCU GPIO for real-time BMS interrupt handling. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated hardware protector | Dedicated comparators for per-cell OV/UV and die-level OT/UT - enables fail-safe shutdown independent of host MCU. |
| Redundant diagnostics path | Independent voltage and temperature measurement paths - satisfies ASIL D diagnostic coverage requirements for random hardware faults. |
| Configurable digital low-pass filter | Post-ADC filtering reduces noise-induced SOC error - improves long-term battery life prediction accuracy in noisy vehicle EMI environments. |
| Host-controlled hardware reset | Emulates power-on-reset behavior via command - eliminates need for external POR circuitry and simplifies system-level reset sequencing. |
| Thermal-aware balancing control | Automatic pause/resume based on die temperature - prevents thermal runaway during extended balancing cycles in high-ambient conditions. |
Applications
| Electric Powertrain Battery Monitoring | Hybrid Vehicle High-Voltage Pack Supervision |
|---|---|
Use Scenario: Real-time cell voltage, temperature, and bus bar current monitoring in 400–800 V traction battery packs for BEVs. IC Role / Device Role / Timing Role: Primary front-end analog monitor and hardware protector - performs autonomous cell balancing and fault detection within 128 µs. Use Value: Enables ASIL D-compliant BMS architecture without external protection ICs, reducing bill-of-materials and board space by 30% versus discrete solutions. |
Use Scenario: Supervision of 14S Li-ion modules in PHEV battery packs where thermal management and voltage imbalance correction are critical. IC Role / Device Role / Timing Role: Standalone 14-cell monitor with integrated balancing and daisy-chain communication - replaces multi-chip monitor + balancer + isolator combinations. Use Value: Reduces system latency for thermal fault response to <200 µs and supports modular pack scaling via pin-compatible family members (BQ79612/BQ79616). |
| Energy Storage System (ESS) Rack-Level Monitoring | Commercial EV Fleet Battery Health Analytics |
Use Scenario: Centralized monitoring of parallel-connected 14S battery racks in grid-tied ESS installations with CAN gateway integration. IC Role / Device Role / Timing Role: Stackable daisy-chain node providing filtered voltage data and heartbeat signals to master controller - supports ring topology for fault-tolerant communication. Use Value: Eliminates single-point communication failure risk and enables >99.9% uptime reporting through embedded fault signaling over daisy chain. |
Use Scenario: Long-term degradation tracking across 1000+ commercial EV batteries using cloud-uploaded cell-level voltage variance and balancing activity logs. IC Role / Device Role / Timing Role: Precision measurement engine with ±1.5 mV accuracy and thermal-compensated balancing - delivers consistent data for AI-driven SOH modeling. Use Value: Extends battery service life prediction accuracy to ±1.2% over 8-year field operation, reducing warranty claim rates by 22%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ79616PAPRQ1 | Supports up to 16S (vs. 14S); identical pinout, package, and firmware interface - adds two extra VC/CB channels. | Required for 16-cell modules; no change needed for 14S designs except disabling unused channels in firmware. | Select when future pack scalability to 16S is planned or when leveraging existing 16S hardware platform. |
| BQ79612PAPRQ1 | Supports up to 12S; shares same HTQFP-64 package and register map but disables VC13–VC14 and CB13–CB14 pins. | Suitable for lower-voltage 12S packs (e.g., 48 V mild-hybrid systems); reduces cost where 14S capability is unnecessary. | Choose for cost-sensitive 12S applications where BQ79614PAPRQ1's 14S headroom is unused. |
Compared with BQ79614PAPRQ1, BQ79616PAPRQ1 offers upward scalability without layout changes, while BQ79612PAPRQ1 lowers BoM cost for smaller packs - both maintain identical ASIL D qualification, daisy-chain architecture, and balancing performance.
Availability
BQ79614PAPRQ1 is available at Aetrix Electronics and suitable for electric powertrain battery monitoring, hybrid vehicle high-voltage pack supervision, and energy storage system rack-level monitoring requiring stable component supply across automotive production lifecycles.
Supply support for BQ79614PAPRQ1 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 and embedded processing technologies, with deep expertise in automotive-grade reliability and functional safety certification.
The BQ7961X-Q1 product line was designed specifically for ASIL D-compliant battery management in high-voltage HEV/EV systems, integrating precision monitoring, hardware protection, and scalable daisy-chain architecture into a single package.
FAQ
What is the maximum supported battery stack configuration for BQ79614PAPRQ1?
BQ79614PAPRQ1 supports battery modules ranging from 6-series to 14-series (6S–14S) cells. It provides 15 cell voltage inputs (VC0–VC14) and 15 balancing connections (CB0–CB14), with VC14 and CB14 being the highest-addressed terminals. Unused higher-order pins (e.g., VC15/VC16) are marked NC and must be tied to BAT per TI layout guidance. This configuration enables direct use in common 14S traction battery architectures without external multiplexing.
Does BQ79614PAPRQ1 include built-in functional safety documentation?
Yes, BQ79614PAPRQ1 is developed for functional safety applications and includes documentation to aid ISO 26262 system design. It achieves hardware and systematic capability up to ASIL D, with FMEDA reports, safety manuals, and diagnostic coverage analysis provided by Texas Instruments. The device supports diagnostic features including redundant voltage/temperature paths, CRC-protected communication, and embedded self-test routines - all verified and documented for automotive safety case development.
How does the internal cell balancing function in BQ79614PAPRQ1?
BQ79614PAPRQ1 provides autonomous internal cell balancing with a rated current of 240 mA per channel. Balancing is controlled via external RC networks on each CB pin, where resistor value sets current magnitude. Thermal management is integrated: the IC monitors die temperature and automatically pauses balancing above TWARN threshold (85–115°C), resuming only after cooling below hysteresis level. This prevents thermal runaway during sustained balancing in high-ambient environments typical of under-hood EV installations.
What communication interfaces does BQ79614PAPRQ1 support?
BQ79614PAPRQ1 supports isolated daisy-chain communication via COMHP/COMHN/COMLP/COMLN pins using differential signaling, compatible with transformer or capacitive isolation. It also includes UART and SPI host interfaces - though these are implemented through an external bridge device (BQ79600-Q1), not natively on-die. The IC itself contains an embedded SPI master for peripheral control and supports broadcast read/write operations across multi-device stacks, with embedded heartbeat and fault signaling over the daisy chain.
Is BQ79614PAPRQ1 pin-compatible with other devices in the BQ7961X-Q1 family?
Yes, BQ79614PAPRQ1 is pin-package and software compatible with BQ79612PAPRQ1 (12S), BQ79616PAPRQ1 (16S), and BQ79616HPAPRQ1 (16S, enhanced performance). All share the same 64-pin HTQFP (PAP) package, identical pin functions for shared channels, and register-mapped firmware. Unused pins in lower-channel variants (e.g., VC15/CB15 on BQ79614PAPRQ1) are designated NC and must be tied to BAT - enabling hardware reuse across 12S/14S/16S platforms with only firmware configuration changes.
BQ79614PAPRQ1 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)
BQ79614PAPRQ1 FAQ
1.How can I place an order for BQ79614PAPRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ79614PAPRQ1 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 BQ79614PAPRQ1 reliable?
The price and inventory of BQ79614PAPRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ79614PAPRQ1 is usually 5 days.
3.What payment methods are accepted for BQ79614PAPRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ79614PAPRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ79614PAPRQ1?
BQ79614PAPRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ79614PAPRQ1 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 BQ79614PAPRQ1?
For technical support, including BQ79614PAPRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ79614PAPRQ1 requirements.
6.How does Aetrix verify that BQ79614PAPRQ1 is sourced from the original manufacturer or authorized distributors?
All BQ79614PAPRQ1 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 BQ79614PAPRQ1 meets industry standards.
7.What is the process for return or replacement of BQ79614PAPRQ1?
All BQ79614PAPRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with BQ79614PAPRQ1, 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 BQ79614PAPRQ1 part is unused and in its original packaging.
Return procedure for BQ79614PAPRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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