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Texas Instruments BQ79652PAPRQ1
- Part No.:
- BQ79652PAPRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 64-PowerTQFP
- Datasheet:
-
BQ79652PAPRQ1.pdf
- Description:
- AUTOMOTIVE 12-S PRECISION BATTER
- Quantity:
- Payment:
- Shipping:
Inventory:989
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Product details
Overview
BQ79652PAPRQ1 from Texas Instruments is an automotive-grade, functional safety-compliant battery monitor IC for 12-cell (12S) lithium-ion battery packs, delivering ±1.5 mV cell voltage measurement accuracy, integrated current sensing via SRP/SRN inputs, and autonomous 240 mA internal cell balancing with thermal management. It operates across –40°C to +125°C ambient and supports daisy-chain isolation for BMS stack architectures in EV powertrain systems.
For engineers reviewing the BQ79652PAPRQ1 datasheet, BQ79652PAPRQ1 pinout, BQ79652PAPRQ1 application, or BQ79652PAPRQ1 equivalent, key selection considerations include its ASIL D hardware capability, 128 µs full-cell-voltage acquisition time, HTQFP-64 package with dedicated VC/CB pin mapping for 12S topologies, and UART/SPI bridge compatibility via BQ79600-Q1.
Technical Context
The BQ79652PAPRQ1 implements a high-speed, multi-channel delta-sigma ADC architecture with post-ADC configurable digital low-pass filters, enabling DC-like voltage measurements while supporting synchronized shunt-based current sensing. Its integrated redundancy path performs concurrent diagnostics on voltage, temperature, and current paths to meet ISO 26262 system-level ASIL D requirements.
It features isolated differential daisy-chain communication with optional ring topology, embedded fault signaling and heartbeat over the bus, and dual-mode operation (ACTIVE/SLEEP) with programmable supply current scaling - including 11.6 mA typical ACTIVE mode draw and 160 µA SLEEP mode baseline at ≤65°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Cell Count Support | 12S (6S–12S configurable); pins VC0–VC12 and CB0–CB12 active; VC13–VC16/CB13–CB16 are no-connect |
| Cell Voltage Accuracy | ±1.5 mV over –40°C to +125°C; enables precise SOC estimation and tight pack balancing control |
| Measurement Speed | Full 12-cell voltage acquisition in ≤128 µs; critical for fast transient response in traction battery monitoring |
| Current Sense Interface | Differential SRP/SRN inputs supporting ±100 mV range; enables high-side or low-side shunt measurement with synchronization to voltage reads |
| Cell Balancing | Internal FETs with 240 mA max current; auto-pause/resume based on die temperature to prevent thermal runaway |
| Functional Safety | Hardware ASIL D and systematic ASIL D capability per ISO 26262; includes diagnostic coverage for ADC, LDOs, and communication paths |
| Operating Temp Range | –40°C to +125°C ambient; qualified per AEC-Q100 Grade 1; supports under-hood and module-integrated BMS placement |
Pinout & Package
Package: HTQFP-64 (PAP), 10.00 mm × 10.00 mm, thermally enhanced with exposed thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BAT | Module high-side supply & sense reference | Connects to top cell anode; serves as primary analog power rail and voltage reference for VC/CB inputs |
| VC0–VC12 | Cell voltage sense inputs | Differential inputs for cells 1–12; VC0 = cell 1 negative, VC12 = cell 12 positive; RC-filtered per channel |
| CB0–CB12 | Cell balance FET connections | Direct connection to internal balancing FET drains; RC network sets 240 mA current; CB0 ties to VC0 ground |
| SRP / SRN | Current sense differential inputs | Accept ±100 mV shunt voltage; support synchronous sampling with cell voltage for accurate Coulomb counting |
| COMHP / COMHN / COMLP / COMLN | Daisy-chain transceiver I/O | Isolated differential interface for stack communication; supports transformer or capacitive coupling; ring topology capable |
| CVDD / CVSS | Daisy-chain power domain | 5 V supply for communication transceivers and GPIOs; supports 10 mA external load in ACTIVE/SLEEP modes |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Current Sensing | Eliminates need for external current-sense amplifier; supports direct shunt connection with synchronized sampling for SOC accuracy |
| ASIL D Hardware Capability | On-chip diagnostics cover ADC conversion integrity, LDO regulation, clock monitoring, and memory ECC - reducing external safety mechanisms |
| Autonomous Thermal Balancing | Automatic pause/resume of balancing based on real-time die temperature; prevents localized overheating without host intervention |
| Configurable Digital Filtering | Post-ADC low-pass filters suppress switching noise and EMI; selectable cutoffs enable trade-off between noise rejection and response latency |
| Embedded Fault Signaling | NFAULT pin asserts active-low on detected faults; heartbeat signal confirms communication liveness - both transmitted over daisy chain |
Applications
| EV Traction Battery Monitoring | 48V Mild Hybrid BMS |
|---|---|
|
Use Scenario: Real-time voltage, temperature, and current monitoring of 12S LiNiMnCoO₂ modules in PHEV battery packs. IC Role / Device Role / Timing Role: Primary cell monitor and balancer; acquires full string voltage in ≤128 µs for fast fault detection and state estimation. Use Value: Enables compliance with ISO 26262 ASIL D requirements through integrated diagnostics and redundant measurement paths. |
Use Scenario: Compact, cost-optimized BMS for 48V stop-start and regenerative braking systems in mild hybrid vehicles. IC Role / Device Role / Timing Role: Standalone 12S monitor with integrated balancing and current sensing; reduces component count vs. discrete solutions. Use Value: Eliminates external current-sense amplifier and balancing drivers, lowering BOM cost and PCB area by >30%. |
| E-Bike Battery Packs | Energy Storage System (ESS) Modules |
|
Use Scenario: High-reliability monitoring of 12S NMC packs in premium e-bikes requiring UL 2271 compliance and thermal run-away prevention. IC Role / Device Role / Timing Role: Functional safety-aware monitor with built-in OT/UT comparators and automatic balancing thermal control. Use Value: Reduces firmware complexity by offloading balancing logic and thermal safety decisions to hardware. |
Use Scenario: Scalable BMS node for 12S lithium iron phosphate (LFP) modules in stationary energy storage cabinets. IC Role / Device Role / Timing Role: Daisy-chain-capable monitor enabling modular stack expansion up to 100+ cells with single host interface. Use Value: Isolated daisy-chain interface eliminates optocouplers and simplifies inter-module wiring in high-voltage racks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ79654PAPRQ1 | Supports up to 14S; VC13/VC14 and CB13/CB14 are functional; same HTQFP-64 package and pinout | Used where higher cell count is required without changing PCB layout; requires updated firmware cell mapping | Select when future scalability to 14S is needed; no hardware redesign required |
| BQ79612PAPRQ1 | No integrated current sensing; lacks SRP/SRN pins; lower supply current (9.5 mA ACTIVE); no ASIL D documentation support | Suitable for cost-sensitive, non-safety-critical 12S applications like consumer power tools | Choose only if functional safety certification and current sensing are not required |
Compared with BQ79654PAPRQ1, the BQ79652PAPRQ1 offers optimized pin count and thermal performance for fixed 12S designs, while BQ79612PAPRQ1 trades safety features and sensing integration for lower cost and power - making it unsuitable for ASIL D systems.
Availability
BQ79652PAPRQ1 is available at Aetrix Electronics and suitable for EV traction battery monitoring, 48V mild hybrid BMS, e-bike battery packs, and energy storage system modules requiring stable component supply, long-term lifecycle assurance, and automotive-grade traceability.
Supply support for BQ79652PAPRQ1 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 company specializing in analog and embedded processing technologies, with leadership in automotive electronics and functional safety solutions.
The BQ7965x-Q1 product line is designed specifically for ISO 26262-compliant battery management in high-voltage electric vehicle powertrains, integrating precision monitoring, hardware-based safety, and scalable daisy-chain architecture.
FAQ
What is the maximum supported battery stack configuration for the BQ79652PAPRQ1?
The BQ79652PAPRQ1 supports 6S to 12S battery modules. Its active cell voltage inputs are VC0–VC12 and balancing terminals CB0–CB12; VC13–VC16 and CB13–CB16 are no-connect pins. This fixed 12S capability distinguishes it from the 14S BQ79654PAPRQ1 and 16S BQ79656PAPRQ1 variants in the same family. The BQ79652PAPRQ1 is optimized for compact, cost-controlled 12-cell designs without unused channel overhead.
Does the BQ79652PAPRQ1 include integrated current sensing capability?
Yes, the BQ79652PAPRQ1 includes dedicated differential current sense inputs SRP and SRN, supporting ±100 mV shunt voltage measurement with synchronization to cell voltage acquisition. This enables accurate coulomb counting and state-of-charge calculation without external amplifiers. The BQ79652PAPRQ1's integrated current sensing is a key differentiator from the BQ79612PAPRQ1, which lacks these pins and requires external signal conditioning.
What functional safety certifications apply to the BQ79652PAPRQ1?
The BQ79652PAPRQ1 is AEC-Q100 Grade 1 qualified (–40°C to +125°C) and developed for functional safety applications per ISO 26262. It achieves hardware ASIL D and systematic ASIL D capability, with documentation provided to support system-level safety analysis. This includes diagnostic coverage for ADC, voltage references, LDOs, clock monitors, and memory - all verified in the BQ79652PAPRQ1 silicon and documented in TI's safety manual.
How does the BQ79652PAPRQ1 handle thermal management during cell balancing?
The BQ79652PAPRQ1 implements autonomous thermal balancing: it monitors die temperature and automatically pauses balancing when thresholds are exceeded, then resumes once temperature falls below hysteresis limits. This hardware-enforced behavior prevents localized overheating without host processor involvement. The BQ79652PAPRQ1's thermal warning threshold is programmable between 85°C and 115°C, with ±5°C accuracy, ensuring robust protection across automotive operating conditions.
What communication interfaces does the BQ79652PAPRQ1 support for host connectivity?
The BQ79652PAPRQ1 supports UART and SPI host interfaces directly, and also functions as a SPI master for peripheral control. For stack communication, it uses isolated differential daisy-chain links via COMHP/COMHN/COMLP/COMLN pins - compatible with transformer, capacitor, or choke-based isolation. Unlike standalone monitors, the BQ79652PAPRQ1 does not require an external bridge IC like BQ79600-Q1 for UART/SPI, though that device can extend host interface options in complex systems.
BQ79652PAPRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 64-PowerTQFP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Battery Monitor
- Battery Chemistry:
- -
- 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)
BQ79652PAPRQ1 FAQ
1.How can I place an order for BQ79652PAPRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ79652PAPRQ1 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 BQ79652PAPRQ1 reliable?
The price and inventory of BQ79652PAPRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ79652PAPRQ1 is usually 5 days.
3.What payment methods are accepted for BQ79652PAPRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ79652PAPRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ79652PAPRQ1?
BQ79652PAPRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ79652PAPRQ1 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 BQ79652PAPRQ1?
For technical support, including BQ79652PAPRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ79652PAPRQ1 requirements.
6.How does Aetrix verify that BQ79652PAPRQ1 is sourced from the original manufacturer or authorized distributors?
All BQ79652PAPRQ1 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 BQ79652PAPRQ1 meets industry standards.
7.What is the process for return or replacement of BQ79652PAPRQ1?
All BQ79652PAPRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with BQ79652PAPRQ1, 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 BQ79652PAPRQ1 part is unused and in its original packaging.
Return procedure for BQ79652PAPRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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