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Texas Instruments BQ7694201PFBR
- Part No.:
- BQ7694201PFBR
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 48-TQFP
- Datasheet:
-
BQ7694201PFBR.pdf
- Description:
- 3-SERIES TO 10-SERIES MULTICELL
- Quantity:
- Payment:
- Shipping:
Inventory:994
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Product details
Overview
BQ7694201PFBR from Texas Instruments is a high-accuracy, 3- to 10-series Li-ion/LiFePO₄ battery monitor and protector IC with integrated high-side charge-pump NFET drivers, dual programmable LDOs (REG1/REG2), and simultaneous voltage/current ADC sampling. It delivers ±5 mV typical cell voltage accuracy, <1 µV input offset for coulomb counting, and supports autonomous or host-controlled cell balancing in cordless power tools and e-bikes.
For engineers reviewing the BQ7694201PFBR datasheet, BQ7694201PFBR pinout, BQ7694201PFBR application, or BQ7694201PFBR equivalent, key selection criteria include its SPI interface with CRC enabled, 48-pin TQFP (PFB) package, 85-V cell-stack tolerance, 9–10 µA DEEPSLEEP current, and support for up to nine external thermistors with internal diagnostics.
Technical Context
The BQ7694201PFBR implements two independent high-accuracy ADCs: one dedicated to cell voltage measurement (±5 mV typical error at 25°C) and another for current sensing across a ±200-mV sense resistor range, enabling synchronized sampling. Its protection subsystem includes configurable overvoltage, undervoltage, overtemperature, and overcurrent triggers with both primary and secondary response layers.
It integrates a high-voltage charge pump driving NFETs for high-side protection, autonomous recovery logic, and OTP memory programmable on production line. Communication is via 400-kHz SPI (CRC enabled), with multifunction pins supporting HDQ, I²C, or general-purpose ADC/thermistor inputs - all operating within –40°C to +85°C functional temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Cell Count Support | 3-series to 10-series Li-ion/LiFePO₄ stacks - enables direct monitoring of up to 10 cells without external multiplexing |
| Cell Voltage Accuracy | ±5 mV (typical, 25°C) - ensures precise state-of-charge estimation and tight protection thresholds |
| Coulomb Counter Offset | <1 µV (typical) - minimizes integration drift during long-term current measurement |
| Supply Current (DEEPSLEEP) | 9–10 µA - extends battery pack shelf life and enables low-power wake-on-event operation |
| Max Stack Voltage Tolerance | 85 V - supports high-voltage packs up to 10S LiFePO₄ (36 V) or 10S Li-ion (42 V) with margin |
| Communication Interface | 400-kHz SPI with CRC enabled - provides robust, noise-immune host communication with data integrity checking |
| Thermistor Inputs | Up to 9 external channels + 1 internal sensor - enables per-cell or zone-based thermal management |
| LDO Outputs | Two programmable outputs (REG1/REG2): 1.8 V, 2.5 V, 3.0 V, 3.3 V, or 5.0 V - powers external MCU, sensors, or FET gate drivers |
Pinout & Package
48-pin TQFP package (PFB), 7 mm × 7 mm body size, exposed thermal pad. Pin functions validated per TI SLUSE14B datasheet Rev B (December 2021).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VC0–VC10 | Cell voltage sense inputs | Direct analog inputs for stacked cell voltages; VC0 = bottom reference, VC10 = top-of-stack; support cell balancing current return paths |
| SRP / SRN | Coulomb counter differential inputs | Accept ±200-mV differential signal across sense resistor; enable high-accuracy current integration with <1 µV offset |
| CHG / DSG | NMOS FET drive outputs | Direct gate-drive outputs for charge/discharge FETs; rated for 70-V max output swing |
| PCHG / PDSG | PFET precharge/predischarge control | Charge-pump-driven outputs for high-side PFETs; support safe inrush current limiting and load disconnect |
| REG1 / REG2 | Programmable LDO outputs | Configurable 1.8–5.0 V outputs; power external circuitry without requiring separate regulators |
| SPI_MOSI / SPI_MISO / SPI_SCLK / SPI_CS | SPI interface pins | Multifunction pins (HDQ, SDA, SCL, CFETOFF, DFETOFF) configured as SPI bus - supports 400-kHz operation with CRC |
| TS1–TS3 | Thermistor/ADC inputs | Three dedicated analog inputs for external NTC/PTC thermistors; also usable as general-purpose ADC channels |
| ALERT / RST_SHUT | System status & control | Open-drain ALERT asserts on fault; RST_SHUT is digital input for hardware reset or shutdown initiation |
Key Features
| Feature | Design Value |
|---|---|
| Simultaneous voltage/current sampling | Enables time-aligned SOC/SOH calculation and fast transient detection without timing skew between cell voltage and current events |
| Autonomous cell balancing | Reduces system MCU overhead by executing balancing decisions internally based on programmed thresholds and timers |
| Integrated secondary chemical fuse drive | Provides hardware-level backup protection path independent of software or primary FET control, enhancing safety-critical reliability |
| Tolerant random cell attach sequence | Eliminates production-line rework by allowing cells to be connected in any order during pack assembly without initialization failure |
| OTP memory programmable on production line | Allows customer-specific configuration (e.g., protection thresholds, LDO settings, communication parameters) to be burned once during manufacturing |
| Multiple ultra-low-power modes | DEEPSLEEP (9–10 µA) and SLEEP (24–41 µA) modes extend battery standby time while retaining fast wake-up capability via TS2 or LD |
Applications
| Cordless Power Tools | E-Bikes & E-Scooters |
|---|---|
Use Scenario: High-current, multi-cell battery packs powering brushless motor controllers with aggressive duty cycles and thermal stress. IC Role / Device Role / Timing Role: Real-time cell voltage balancing, overcurrent/overtemperature shutdown, and coulomb-counted SOC reporting to host MCU. Use Value: Prevents cell imbalance-induced capacity loss and enables accurate runtime prediction under variable load profiles up to 30 A peak. | Use Scenario: 36–48 V Li-ion battery systems requiring UL 2271 compliance, regenerative braking feedback, and rider-safety thermal cutoffs. IC Role / Device Role / Timing Role: Primary protector with autonomous recovery, stack voltage validation, and thermistor-based zone monitoring across motor, controller, and battery zones. Use Value: Meets EN 15194 thermal derating requirements via 9-channel thermistor support and <10 mV cell voltage accuracy for precise overvoltage cutoff. |
| Vacuum Cleaners | Non-Military Drones |
Use Scenario: Compact, high-power-density 10S Li-ion packs subject to rapid charge/discharge cycles and mechanical vibration. IC Role / Device Role / Timing Role: High-side NFET protection with charge-pump drive, cell open-wire detection, and OTP-configured protection delays. Use Value: Eliminates need for external high-voltage level shifters and reduces BOM count by integrating FET drivers and diagnostics. | Use Scenario: Lightweight 6S–10S LiPo packs where weight, footprint, and fault resilience directly impact flight safety and regulatory certification. IC Role / Device Role / Timing Role: Dual-ADC synchronized sampling for dynamic load compensation, HDQ one-wire telemetry, and autonomous balancing during hover/idle states. Use Value: Enables sub-1% SOC error over 200+ cycles and meets DO-178C tool qualification prerequisites via internal diagnostics and CRC-protected SPI. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery monitor and protector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ7694202PFBR | I²C interface (400 kHz) with CRC enabled; REG1 LDO defaults to 3.3 V | Preferred for host systems using I²C buses with strict noise immunity requirements | Select when I²C is required and 3.3-V LDO output is needed for MCU or sensor biasing |
| BQ7695201PFBR | Higher cell count (up to 16S); adds integrated 3.3-V LDO regulator and enhanced diagnostics | Suitable for larger industrial or energy storage systems beyond 10S | Choose only if scaling to >10S stacks or requiring built-in 3.3-V supply for external peripherals |
Compared with BQ7694201PFBR, the BQ7694202PFBR offers identical functionality but substitutes SPI for I²C - simplifying integration in I²C-dominant architectures - while the BQ7695201PFBR extends scalability to 16S at higher cost and pin count, making it over-specified for 3–10S applications unless future-proofing is critical.
Availability
BQ7694201PFBR is available at Aetrix Electronics and suitable for cordless power tools, e-bikes, and vacuum cleaners requiring stable component supply, long-lifecycle support, and automotive-grade reliability in industrial battery management systems.
Supply support for BQ7694201PFBR 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 decades of leadership in battery management IC design.
The BQ76942 family targets high-accuracy, high-reliability battery packs for demanding portable and mobility applications - designed to replace discrete protection circuits with integrated, field-proven safety and precision monitoring.
FAQ
What communication interface does the BQ7694201PFBR support?
The BQ7694201PFBR supports 400-kHz SPI with CRC enabled as its primary interface. Unlike other variants in the BQ76942 family, it does not support I²C or HDQ by default - SPI configuration is fixed and verified in the device part number suffix "01". This ensures deterministic timing and robust noise immunity in electrically noisy power tool or e-bike environments where the BQ7694201PFBR is deployed.
Does the BQ7694201PFBR include integrated FET drivers?
Yes, the BQ7694201PFBR integrates high-side charge-pump NFET drivers for PCHG and PDSG, plus NMOS drivers for CHG and DSG. These drivers support up to 70-V output swing and are designed to directly control external MOSFETs without level-shifting components. The BQ7694201PFBR's charge pump eliminates the need for external high-voltage bias supplies, reducing system complexity and PCB area - a key advantage over discrete protection solutions.
What is the cell voltage measurement accuracy of the BQ7694201PFBR?
The BQ7694201PFBR achieves ±5 mV typical cell voltage measurement accuracy at 25°C (2 V–5 V range), ±10 mV from 0°C to 60°C, and ±15 mV across the full –40°C to +85°C operating range. This accuracy is specified after board-level offset calibration and enables reliable overvoltage/undervoltage protection and precise state-of-charge estimation - critical for maximizing cycle life in applications like cordless power tools where the BQ7694201PFBR is commonly used.
How many external thermistors can the BQ7694201PFBR monitor?
The BQ7694201PFBR supports up to nine external thermistors via dedicated TS1–TS3 pins and six additional multifunction pins (ALERT, HDQ, CFETOFF, DFETOFF, DCHG, DDSG) configurable as thermistor inputs. Combined with its internal die temperature sensor, this provides comprehensive thermal coverage across large battery packs - essential for meeting safety standards in e-bikes and drones where the BQ7694201PFBR serves as the primary thermal supervisor.
What power modes does the BQ7694201PFBR offer and what are their typical currents?
The BQ7694201PFBR offers NORMAL mode (286 µA), multiple SLEEP options (24–41 µA), multiple DEEPSLEEP options (9–10 µA), and SHUTDOWN mode (1 µA). DEEPSLEEP enables ultra-low quiescent current while retaining wake capability via TS2 or LD pin - extending shelf life and enabling instant-on behavior in portable equipment. These modes are fully configurable via registers or OTP, and the BQ7694201PFBR's low-power architecture is validated across –40°C to +85°C.
BQ7694201PFBR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 48-TQFP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Multi-Function Controller
- Battery Chemistry:
- LiFePO4/Li-ion
- Number of Cells:
- 3 ~ 10
- Fault Protection:
- Over Current, Over Temperature, Over Voltage, Short Circuit
- Interface:
- SPI
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TQFP (7x7)
BQ7694201PFBR FAQ
1.How can I place an order for BQ7694201PFBR through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ7694201PFBR 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 BQ7694201PFBR reliable?
The price and inventory of BQ7694201PFBR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ7694201PFBR is usually 5 days.
3.What payment methods are accepted for BQ7694201PFBR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ7694201PFBR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ7694201PFBR?
BQ7694201PFBR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ7694201PFBR 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 BQ7694201PFBR?
For technical support, including BQ7694201PFBR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ7694201PFBR requirements.
6.How does Aetrix verify that BQ7694201PFBR is sourced from the original manufacturer or authorized distributors?
All BQ7694201PFBR 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 BQ7694201PFBR meets industry standards.
7.What is the process for return or replacement of BQ7694201PFBR?
All BQ7694201PFBR units undergo pre-shipment inspection (PSI). If there is an issue with BQ7694201PFBR, 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 BQ7694201PFBR part is unused and in its original packaging.
Return procedure for BQ7694201PFBR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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