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Texas Instruments BQ75614PAPRQ1
- Part No.:
- BQ75614PAPRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 64-PowerTQFP
- Datasheet:
-
BQ75614PAPRQ1.pdf
- Description:
- 14-S AUTOMOTIVE PRECISION BATTER
- Quantity:
- Payment:
- Shipping:
Inventory:416
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Product details
Overview
BQ75614PAPRQ1 from Texas Instruments is a standalone, AEC-Q100 Grade 1 automotive battery monitor IC for 48 V Li-ion systems, delivering ±1.5 mV cell voltage ADC accuracy, integrated current sensing via SRP/SRN inputs, and autonomous 240 mA internal cell balancing across up to 16 cells. It operates from –40°C to +125°C ambient and supports UART host interface and SPI master functionality.
For engineers reviewing the BQ75614PAPRQ1 datasheet, BQ75614PAPRQ1 pinout, BQ75614PAPRQ1 application, or BQ75614PAPRQ1 equivalent, this device serves as a functional-safety-compliant (ASIL D capable) solution for high-accuracy voltage, temperature, and current monitoring in electric powertrain subsystems, 48 V mild-hybrid architectures, and e-mobility battery packs requiring redundancy, diagnostics, and thermal-aware balancing control.
Technical Context
The BQ75614PAPRQ1 implements dual ADC architecture: a 16-bit main ADC for cell voltage (128 µs full-channel scan) and a 14-bit auxiliary ADC for thermistors, BAT voltage, and GPIO measurements. It features post-ADC configurable digital low-pass filters and built-in redundancy paths for voltage, temperature, and current diagnostics.
Its functional safety design includes hardware-level ASIL D capability, ISO 26262 documentation support, and autonomous fault detection-covering open-wire, overvoltage/undervoltage, overtemperature/undertemperature, and thermal shutdown (137°C trip, 20°C hysteresis). The device integrates an LDO (5 V CVDD), DVDD (1.8 V), AVDD (5 V), TSREF (5 V bias), and NEG5V charge pump for precision analog operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Cell Count Support | Up to 16-series Li-ion cells (14S or 16S configuration); enables direct monitoring of 48 V battery modules without daisy-chaining. |
| ADC Accuracy | ±1.5 mV total channel error (–40°C to +125°C); ensures reliable state-of-charge (SoC) and state-of-health (SoH) estimation under automotive thermal stress. |
| Current Sense Interface | Dedicated SRP/SRN differential inputs with 30.52 µV/LSB resolution; supports shunt-based current measurement synchronized with cell voltage sampling. |
| Cell Balancing | Integrated FETs with 240 mA max balancing current and automatic thermal pause/resume; eliminates need for external balancing drivers or thermal management logic. |
| Operating Temp Range | –40°C to +125°C ambient (AEC-Q100 Grade 1); validated for under-hood and battery-pack mounting in automotive environments. |
| Functional Safety | Hardware ASIL D and systematic ASIL D capability per ISO 26262; includes diagnostic coverage for voltage, temperature, current, and communication paths. |
| Communication | UART host interface (TX/RX) + built-in SPI master; enables direct connection to MCU without external level shifters or protocol translators. |
Pinout & Package
Package: HTQFP-64 (PAP), 10.00 mm × 10.00 mm body size, exposed thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BAT | Module high-side supply & top-cell reference | Connects to battery pack positive terminal; supplies internal regulators and serves as voltage reference for VC1–VC16 inputs. |
| VC0–VC16 | Cell voltage sense inputs | Differential inputs for measuring individual cell voltages (VC0 = bottom of Cell 1; VC16 = top of Cell 16); require RC filtering per TI layout guidelines. |
| CB0–CB16 | Cell balance FET terminals | Direct connections to internal balancing FETs; resistor between CBn/CBn−1 sets balancing current (240 mA typical at 1.5 Ω). |
| SRP / SRN | Current sense differential inputs | Accepts voltage drop across external shunt; enables high-resolution current measurement (14.9 nV/LSB) with synchronization to cell voltage sampling. |
| TX / RX | UART serial interface | Asynchronous full-duplex communication with host MCU; no external transceiver required; CVDD-referenced I/O. |
| GPIO1–GPIO8 | Configurable auxiliary inputs/outputs | Support NTC thermistor biasing (TSREF), DC voltage sensing, digital I/O, or SPI peripheral control; each sampled by AUX ADC. |
| CVDD / DVDD / AVDD / TSREF / NEG5V | Internal power rails & references | On-chip LDOs provide regulated 5 V (CVDD), 1.8 V (DVDD), 5 V analog (AVDD), 5 V thermistor bias (TSREF), and –5 V charge pump (NEG5V) for precision ADC operation. |
Key Features
| Feature | Design Value |
|---|---|
| Autonomous cell balancing with thermal management | Pauses balancing when die temperature exceeds 105°C (CB_TWARN) and resumes after 10°C hysteresis-prevents thermal runaway without host intervention. |
| Redundant diagnostics path | Independent voltage, temperature, and current monitoring paths with cross-check capability-meets ASIL D diagnostic coverage requirements. |
| Configurable digital low-pass filtering | Post-ADC LPF_VCELL[2:0] settings enable noise suppression while preserving transient response for SoC/SoH algorithms. |
| Fuse and relay open/close diagnostics | Dedicated SW1/SW2 pins support direct connection to fuse/relay sense points; enables real-time contact health monitoring in safety-critical disconnect circuits. |
| Hardware reset emulation | Built-in host-controlled reset mimics power-on reset behavior-ensures deterministic initialization without external POR circuitry. |
Applications
| 48 V Mild-Hybrid Powertrain | E-Bike Battery Management |
|---|---|
|
Use Scenario: Real-time monitoring of 13–16 series Li-ion cells in 48 V starter-generator and regenerative braking systems. IC Role / Device Role / Timing Role: Standalone voltage/current/temperature acquisition and balancing controller; performs full 16-cell scan in <200 µs with synchronized current sampling. Use Value: Enables precise SoC estimation and cell-level balancing during dynamic load transients-critical for torque consistency and battery longevity in HEV applications. |
Use Scenario: Compact, high-accuracy BMS for mid-drive e-bike battery packs operating in variable ambient conditions (-20°C to 60°C). IC Role / Device Role / Timing Role: Primary cell monitor with integrated current sensing and thermal-aware balancing; uses GPIOs for NTC thermistor interfaces and relay control. Use Value: Reduces bill-of-materials by eliminating external ADCs, balancers, and isolated UART transceivers-while maintaining ±1.5 mV accuracy across temperature range. |
| Automotive 12 V Backup System | Commercial E-Scooter Pack |
|
Use Scenario: Secondary 12 V Li-ion backup system for ADAS domain controllers and infotainment during main 48 V rail faults. IC Role / Device Role / Timing Role: Fault-tolerant monitor with redundant voltage/temperature diagnostics and NFAULT pin assertion on OV/UV/OT events. Use Value: Supports ASIL B decomposition via hardware-level redundancy-ensures fail-safe shutdown and status reporting even if primary BMS fails. |
Use Scenario: High-volume, cost-optimized BMS for shared e-scooter fleets requiring robust cell balancing and overcurrent protection. IC Role / Device Role / Timing Role: Integrated current sense + balancing + UART telemetry in single package; supports OTA firmware updates via host MCU. Use Value: Delivers 240 mA balancing current without external FETs or thermal sensors-reducing PCB area and assembly cost while meeting UL 2271 cycle-life requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ79614-Q1 | Stackable 14S monitor; requires daisy-chain configuration and external MCU for system-level coordination; no integrated current sense. | Used in larger multi-module packs where centralized host control is preferred over standalone operation. | Select BQ79614-Q1 only when scaling beyond 16 cells or requiring inter-device synchronization across multiple BQ796xx devices. |
| BQ75614QPAPRQ1 | Same silicon, identical electrical specs and pinout; differs only in tape-and-reel packaging (PAPR vs QPAPR) and ordering part number format. | No functional difference; used interchangeably in production where packaging logistics dictate reel vs tray delivery. | Choose BQ75614QPAPRQ1 for automated SMT lines requiring 2,000-unit reels; BQ75614PAPRQ1 remains optimal for prototyping and low-volume builds. |
Compared with BQ79614-Q1, the BQ75614PAPRQ1 eliminates daisy-chain complexity and adds shunt-based current sensing-making it ideal for compact 48 V systems. Versus BQ75614QPAPRQ1, it offers identical performance but optimized for tray-based handling and evaluation use cases.
Availability
BQ75614PAPRQ1 is available at Aetrix Electronics and suitable for automotive 48 V mild-hybrid systems, e-bike battery packs, and commercial e-scooter designs requiring stable component supply, long-term lifecycle assurance, and AEC-Q100 compliance.
Supply support for BQ75614PAPRQ1 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 power management technologies, with deep expertise in automotive-grade reliability and functional safety.
The BQ75614PAPRQ1 belongs to TI's BQ756x-Q1 standalone battery monitor product line, designed specifically for simplified, high-accuracy 48 V Li-ion system monitoring without daisy-chain dependencies or external balancing components.
FAQ
What is the maximum supported battery module voltage for the BQ75614PAPRQ1?
The BQ75614PAPRQ1 supports total module voltages from 9 V to 80 V, covering standard 13S–16S Li-ion configurations in 48 V automotive and e-mobility applications. Its VCn-to-VCn−1 input range is –1 V to +5 V, and absolute VCn-to-AVSS rating reaches 80 V-enabling safe operation across full state-of-charge ranges without external voltage dividers.
Does the BQ75614PAPRQ1 support both 14S and 16S configurations?
Yes, the BQ75614PAPRQ1 supports either 14S or 16S configurations via configuration registers and pin strapping options. It provides dedicated VC0–VC16 and CB0–CB16 pins, allowing flexible mapping to match actual cell count-no hardware change required when scaling between 14- and 16-cell modules.
How does the BQ75614PAPRQ1 handle thermal management during cell balancing?
The BQ75614PAPRQ1 monitors die temperature and automatically pauses balancing when CB_TWARN threshold (105°C) is exceeded, resuming only after temperature falls below 95°C (10°C hysteresis). This thermal-aware control prevents overheating without host MCU involvement-ensuring safe, autonomous operation in sealed battery enclosures.
Can the BQ75614PAPRQ1 measure external thermistors?
Yes, the BQ75614PAPRQ1 supports up to eight external NTC thermistors via GPIO1–GPIO8 pins, using TSREF (5 V bias) and the auxiliary ADC. Each GPIO can be configured as thermistor input with programmable pull-up, enabling accurate temperature profiling across battery modules without external ADCs or signal conditioners.
Is the BQ75614PAPRQ1 pin-compatible with other devices in the BQ796xx-Q1 family?
No, the BQ75614PAPRQ1 is not pin-compatible with BQ796xx-Q1 devices. While software and functional features are aligned (e.g., register maps and diagnostics), its HTQFP-64 pinout differs significantly-especially in power rail placement (CVDD/DVDD/AVDD), GPIO count, and absence of daisy-chain interface pins like COMPA/COMPB. Hardware redesign is required for migration.
BQ75614PAPRQ1 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:
- 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)
BQ75614PAPRQ1 FAQ
1.How can I place an order for BQ75614PAPRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ75614PAPRQ1 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 BQ75614PAPRQ1 reliable?
The price and inventory of BQ75614PAPRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ75614PAPRQ1 is usually 5 days.
3.What payment methods are accepted for BQ75614PAPRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ75614PAPRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ75614PAPRQ1?
BQ75614PAPRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ75614PAPRQ1 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 BQ75614PAPRQ1?
For technical support, including BQ75614PAPRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ75614PAPRQ1 requirements.
6.How does Aetrix verify that BQ75614PAPRQ1 is sourced from the original manufacturer or authorized distributors?
All BQ75614PAPRQ1 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 BQ75614PAPRQ1 meets industry standards.
7.What is the process for return or replacement of BQ75614PAPRQ1?
All BQ75614PAPRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with BQ75614PAPRQ1, 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 BQ75614PAPRQ1 part is unused and in its original packaging.
Return procedure for BQ75614PAPRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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