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Texas Instruments BQ79616PAPRQ1
- Part No.:
- BQ79616PAPRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 64-PowerTQFP
- Datasheet:
-
BQ79616PAPRQ1.pdf
- Description:
- 16-S AUTOMOTIVE PRECISION BATTER
- Quantity:
- Payment:
- Shipping:
Inventory:1,277
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Product details
Overview
BQ79616PAPRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive battery monitor IC for 16-cell (16S) high-voltage battery modules, delivering ±1.5 mV cell voltage measurement accuracy, integrated 240 mA cell balancing, and ASIL-D functional safety compliance per ISO 26262. It performs full-cell voltage acquisition in ≤128 µs, supports daisy-chain isolation via differential COMHP/COMHN/COMLP/COMLN interfaces, and enables bus bar sensing with 5× gain on BBP/BBN pins - deployed in HEV/EV powertrain BMS stacks.
For engineers reviewing the BQ79616PAPRQ1 datasheet, BQ79616PAPRQ1 pinout, BQ79616PAPRQ1 application, or BQ79616PAPRQ1 equivalent, key selection criteria include its 64-pin HTQFP package with verified VC/CB pin mapping for 16S topology, hardware-level fault signaling via NFAULT, autonomous thermal-managed balancing, and compatibility with BQ79600-Q1 UART/SPI bridge for host MCU integration.
Technical Context
The BQ79616PAPRQ1 implements a high-precision sigma-delta ADC architecture with post-ADC configurable digital low-pass filters to deliver DC-like voltage measurements for accurate SOC estimation. Its integrated front-end supports differential RC filtering on all 16 cell inputs (VC0–VC16) and 16 balance channels (CB0–CB16), enabling robust noise rejection in noisy automotive environments.
It features dual communication paths: isolated daisy-chain interface (COMHP/COMHN/COMLP/COMLN) supporting ring or linear topologies, and a UART/SPI host interface - with built-in SPI master capability for peripheral control. Fault diagnostics include redundant voltage/temperature monitoring, thermal warning (85–115°C) and shutdown (130–152°C), and open-wire detection with 380–600 µA test current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Cell Count Support | 16S (VC0–VC16, CB0–CB16); NC pins for lower-channel variants are unused but tied to BAT per design guide |
| Cell Voltage Accuracy | ±1.5 mV over –40°C to +125°C ambient; enables <0.5% SOC error in high-precision BMS |
| Measurement Speed | Full 16-cell scan completed in ≤128 µs; critical for fast transient response in regenerative braking |
| Cell Balancing Current | 240 mA per channel with automatic pause/resume based on die temperature; prevents thermal runaway during balancing |
| Daisy-Chain Interface | Differential isolated COMHP/COMHN/COMLP/COMLN; supports up to 15 devices in ring or linear configuration |
| Bus Bar Sensing | BBP/BBN differential input with 5× gain; measures shunt or bus bar voltage drop for pack current estimation |
| Functional Safety | Hardware and systematic ASIL-D capability per ISO 26262; includes documentation for safety case development |
Pinout & Package
64-pin HTQFP (PAP) package, 10.00 mm × 10.00 mm body size, 0.5 mm pitch, exposed thermal pad. Pinout validated per TI SLUSE81F Rev F (June 2026) datasheet Figure 5–1 and Table 5–1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BAT | Module top voltage reference | Connects to positive terminal of top cell; serves as analog supply and measurement reference point for VC16/CB16 |
| VC0–VC16 | Cell voltage sense inputs | Differential inputs for 16 cells; VC0 = bottom cell negative, VC16 = top cell positive; require external RC filters |
| CB0–CB16 | Cell balance FET connections | Drive internal balancing FETs; resistor on CBn sets balancing current; CB0 connects to VC0 ground path |
| BBP / BBN | Bus bar differential input | 5× gain differential ADC channel for pack current sensing via external shunt or bus bar |
| COMHP / COMHN / COMLP / COMLN | Daisy-chain transceiver I/O | Isolated differential interface; COMHP/COMHN = north side, COMLP/COMLN = south side; supports ring topology |
| NFAULT | Open-drain fault indicator | Active-low signal asserting OV/UV/OT/UT/communication faults; pulled up to CVDD at base device |
| GPIO1–GPIO8 | Configurable I/O | Support NTC thermistor bias (TSREF), ADC inputs, digital I/O, or SPI master functions |
Key Features
| Feature | Design Value |
|---|---|
| ASIL-D Functional Safety Architecture | Hardware redundancy, diagnostic coverage >90%, safety manual and FMEDA reports provided for ISO 26262 system integration |
| Autonomous Thermal-Managed Balancing | On-die temperature monitoring triggers automatic balancing pause above threshold and resume below hysteresis - no host intervention required |
| Integrated Post-ADC Digital Filtering | Configurable low-pass filters suppress switching noise and ripple, yielding stable DC-equivalent voltage values for SOC algorithms |
| Embedded Fault Signaling & Heartbeat | NFAULT output pulses periodically during healthy operation; stops during fault - enables watchdog verification without host polling |
| Pin- and Software-Compatible Family | Shares footprint and register map with BQ79614-Q1 (14S) and BQ79612-Q1 (12S); enables scalable BMS hardware reuse across vehicle platforms |
Applications
| EV Powertrain Battery Pack Monitoring | HEV High-Voltage Auxiliary Battery Management |
|---|---|
Use Scenario: Real-time cell voltage, temperature, and state-of-health monitoring in 400–800 V traction battery packs during acceleration, regen, and charging cycles. IC Role / Device Role / Timing Role: Primary cell monitor and balancer in multi-tier BMS stack; acquires full 16S data in ≤128 µs to support 10 ms control loop timing. Use Value: Enables precise SOC/SOH estimation and active cell balancing to extend pack life and maintain voltage consistency across 100+ series cells. |
Use Scenario: Monitoring 48–72 V lithium-ion auxiliary battery in hybrid electric vehicles powering ADAS, HVAC, and 12 V subsystems. IC Role / Device Role / Timing Role: Standalone 16S monitor with integrated protector comparators (OV/UV/OT/UT); asserts NFAULT within 1 µs of fault detection. Use Value: Eliminates need for external protection ICs; reduces BOM count while meeting ASIL-D requirements for safety-critical auxiliary systems. |
| Modular Energy Storage System (ESS) Rack Monitoring | Commercial EV Fleet Battery Diagnostics Platform |
Use Scenario: Distributed monitoring of 16S modules in scalable grid-tied ESS racks, where modules are stacked and daisy-chained for centralized control. IC Role / Device Role / Timing Role: Daisy-chain node with COMHP/COMLN vertical interface; supports ring topology for fault-tolerant communication across 15+ nodes. Use Value: Enables single-wire fault isolation and hot-swap-capable module replacement without breaking communication continuity. |
Use Scenario: Depot-level battery health analysis using high-fidelity voltage and temperature logs captured during charge/discharge cycles. IC Role / Device Role / Timing Role: High-accuracy data acquisition engine feeding cloud analytics; leverages ±1.5 mV ADC accuracy and 128 µs scan for millivolt-level delta tracking. Use Value: Detects early cell degradation (e.g., <2 mV divergence over 100 cycles) before capacity loss becomes irreversible. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ79616H-Q1 | Same 16S functionality and pinout; differs only in OTP programming behavior and minor calibration settings - not user-accessible in field operation | No functional difference in runtime BMS operation; identical ASIL-D qualification and measurement specs | Select BQ79616H-Q1 only if required by TI's production programming flow; BQ79616PAPRQ1 is standard production variant. |
| BQ79656-Q1 | 16S monitor with identical pinout and software compatibility, but adds integrated hardware-based overvoltage/undervoltage/overtemperature protection with independent analog comparators | Eliminates need for external protector ICs in cost-sensitive designs; higher integration but same PCB layout | Choose BQ79656-Q1 when hardware-level protector independence is required; BQ79616PAPRQ1 relies on host-controlled digital protection. |
Compared with BQ79616H-Q1, BQ79616PAPRQ1 offers identical real-time performance and safety certification, while BQ79656-Q1 extends autonomy with analog protector circuits - making it preferable for fail-safe architectures where host MCU failure must not compromise cell safety.
Availability
BQ79616PAPRQ1 is available at Aetrix Electronics and suitable for automotive BMS development, energy storage system integration, and commercial EV fleet diagnostics requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant traceability.
Supply support for BQ79616PAPRQ1 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 electronics, with decades of experience in high-reliability power management and battery solutions.
The BQ79616PAPRQ1 belongs to TI's BQ7961x-Q1 functional safety-compliant battery monitor family, designed specifically for ASIL-D automotive BMS applications demanding precision, redundancy, and seamless scalability across 12S–16S configurations.
FAQ
What is the maximum supported battery module voltage for BQ79616PAPRQ1?
The BQ79616PAPRQ1 supports total module voltages from 9 V to 80 V in normal operation, with full functionality including OTP programming enabled between 11 V and 80 V. This range accommodates 16-cell lithium-ion stacks (typically ~56 V nominal, ~67.2 V max) and allows headroom for transient overvoltage conditions in automotive environments.
Does BQ79616PAPRQ1 require external balancing FETs?
No, BQ79616PAPRQ1 integrates 16 internal balancing FETs capable of 240 mA per channel. External RC networks on CB pins set the balancing current and provide thermal management; no discrete MOSFETs or driver circuitry are needed - reducing BOM count and PCB area.
How does the daisy-chain interface of BQ79616PAPRQ1 ensure communication reliability in noisy EV environments?
The BQ79616PAPRQ1 uses isolated differential signaling on COMHP/COMHN/COMLP/COMLN pins with common-mode rejection >60 dB and built-in heartbeat signaling. It supports ring topology so a single node failure does not break the entire chain, and embedded CRC validation ensures data integrity across multi-node stacks.
Can BQ79616PAPRQ1 measure bus bar voltage for current sensing?
Yes, BQ79616PAPRQ1 provides dedicated BBP and BBN pins with 5× gain differential input for direct bus bar or shunt resistor connection. This enables high-side current sensing without additional op-amps or isolated amplifiers, simplifying pack-level current monitoring in space-constrained designs.
Is BQ79616PAPRQ1 compatible with BQ79600-Q1 for host interface bridging?
Yes, BQ79616PAPRQ1 is explicitly designed to interface with BQ79600-Q1 as a UART/SPI-to-daisy-chain bridge. The BQ79600-Q1 handles protocol translation and isolation, allowing microcontrollers without native daisy-chain support to fully configure and read data from BQ79616PAPRQ1 stacks.
BQ79616PAPRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 64-PowerTQFP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Multi-Function Controller
- 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)
BQ79616PAPRQ1 FAQ
1.How can I place an order for BQ79616PAPRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ79616PAPRQ1 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 BQ79616PAPRQ1 reliable?
The price and inventory of BQ79616PAPRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ79616PAPRQ1 is usually 5 days.
3.What payment methods are accepted for BQ79616PAPRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ79616PAPRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ79616PAPRQ1?
BQ79616PAPRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ79616PAPRQ1 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 BQ79616PAPRQ1?
For technical support, including BQ79616PAPRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ79616PAPRQ1 requirements.
6.How does Aetrix verify that BQ79616PAPRQ1 is sourced from the original manufacturer or authorized distributors?
All BQ79616PAPRQ1 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 BQ79616PAPRQ1 meets industry standards.
7.What is the process for return or replacement of BQ79616PAPRQ1?
All BQ79616PAPRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with BQ79616PAPRQ1, 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 BQ79616PAPRQ1 part is unused and in its original packaging.
Return procedure for BQ79616PAPRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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