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Texas Instruments BQ7697204PFBR
- Part No.:
- BQ7697204PFBR
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 48-TQFP
- Datasheet:
-
BQ7697204PFBR.pdf
- Description:
- 3S-TO-16S HIGH-ACCURACY BATTERY
- Quantity:
- Payment:
- Shipping:
Inventory:921
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Product details
Overview
BQ7697204PFBR from Texas Instruments is a high-accuracy, 3- to 16-series Li-ion/LiFePO₄ battery monitor and protector IC with ±3.0 mV cell voltage measurement accuracy, integrated high-side NFET charge pump drivers, dual programmable LDOs (REG1/REG2), and SPI communication interface. It performs autonomous or host-controlled cell balancing and supports up to nine external thermistors in energy storage and e-mobility battery packs.
For engineers reviewing the BQ7697204PFBR datasheet, BQ7697204PFBR pinout, BQ7697204PFBR application, or BQ7697204PFBR equivalent, key selection considerations include its 48-pin TQFP package, 85 V high-voltage tolerance on cell inputs, 9–10 µA DEEPSLEEP current, ±200-mV current-sense range, and OTP memory programmability for production-line configuration.
Technical Context
The BQ7697204PFBR implements two independent ADCs for simultaneous high-accuracy voltage and current sampling, with coulomb counter input offset error <1 µV (typical) and dedicated digital filters (CC1/CC2) for precision charge tracking. Its protection subsystem includes comparator-based overvoltage, undervoltage, overtemperature, and overcurrent detection with configurable thresholds and delays.
It integrates a charge pump enabling high-side NFET drive without external components, supports random cell attach during manufacturing, and features an internal 1.8-V LDO (REG18) plus two user-programmable LDOs (REG1/REG2) settable to 1.8 V, 2.5 V, 3.0 V, 3.3 V, or 5.0 V - all powered from REGIN. The device operates across –40°C to +85°C with functional 85 V absolute max rating on VC0–VC16 pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Cell Count Range | Supports 3- to 16-series Li-ion, Li-polymer, or LiFePO₄ stacks - enables scalable pack design from 12.6 V to 67.2 V nominal. |
| Cell Voltage Accuracy | ±3.0 mV - ensures precise state-of-charge estimation and tight voltage-based protection triggering. |
| Coulomb Counter Offset | <1 µV (typical) - minimizes integration drift during long-term current monitoring for accurate capacity tracking. |
| Current Sense Range | ±200 mV across sense resistor - accommodates wide-range shunt values for high-current (e.g., >100 A) or low-current (e.g., <1 A) applications. |
| Supply Current (DEEPSLEEP) | 9.2–10.7 µA - extends battery pack shelf life and enables ultra-low-power standby in backup systems. |
| Communication Interface | SPI (400 kHz) - provides deterministic, noise-immune host control suitable for real-time BMS firmware updates and diagnostics. |
| High-Voltage Tolerance | 85 V on VC0–VC16, PACK, LD - eliminates need for external level-shifting in high-cell-count industrial and E-bike packs. |
| OTP Memory | One-time-programmable - allows secure, production-line customization of protection thresholds, LDO settings, and balancing parameters. |
Pinout & Package
48-pin TQFP package (PFB), 7 mm × 7 mm body size, exposed thermal pad (not electrically connected), RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VC0–VC16 | Cell voltage sense inputs | 17 analog inputs spanning stack bottom (VC0) to top (VC16); each serves as sense node and balance current return path for adjacent cell. |
| SRP / SRN | Coulomb counter differential inputs | Accept ±200-mV differential voltage across sense resistor; enable high-accuracy current integration with sub-µV offset. |
| CHG / DSG | NMOS FET drive outputs | Direct gate-drive outputs for charge/discharge MOSFETs; support 11 V overdrive mode for low-RDS(on) FET control. |
| PCHG / PDSG | PFET precharge/predischarge drivers | Charge-pump-powered outputs enabling safe precharge into depleted packs and controlled predischarge before shutdown. |
| REG1 / REG2 | Programmable LDO outputs | Configurable 1.8–5.0 V outputs (each independently set) for powering MCU, sensors, or peripheral ICs - reduces external regulator count. |
| SPI_SCLK / SPI_MISO / SPI_MOSI / SPI_CS | SPI interface pins | Mapped to SCL, SDA, HDQ, and CFETOFF pins respectively - enables full-duplex, clock-synchronized host communication at 400 kHz. |
| TS1–TS3 | Thermistor/ADC inputs | Three dedicated analog inputs supporting NTC/PTC thermistors or general-purpose ADC measurements; TS2 doubles as wake-up source from SHUTDOWN. |
| RST_SHUT | Digital input for reset/shutdown | Active-low input that forces device into SHUTDOWN mode (1 µA) or initiates cold reset - critical for system-level safety sequencing. |
Key Features
| Feature | Design Value |
|---|---|
| Autonomous cell balancing | Integrated balancing FETs and timing logic enable passive balancing without host intervention - reduces firmware complexity in resource-constrained systems. |
| High-side NFET charge pump | On-chip charge pump generates gate drive voltage above stack voltage - eliminates need for external bootstrap circuitry in high-side switch configurations. |
| Dual programmable LDOs | REG1 and REG2 independently configurable to 1.8/2.5/3.0/3.3/5.0 V - powers diverse peripherals (MCU, transceivers, sensors) from single BQ7697204PFBR supply rail. |
| Random cell attach tolerance | Hardware-level support for non-sequential cell connection during pack assembly - improves manufacturing yield and simplifies automated line integration. |
| Extensive protection suite | Independent voltage, temperature, current, and internal diagnostic checks with user-configurable thresholds and delay timers - meets IEC 62133 and UL 1642 requirements. |
| OTP memory programming | Customer-programmable one-time memory stores custom protection settings, LDO defaults, and balancing parameters - enables post-manufacture BMS personalization without re-spinning firmware. |
Applications
| Energy Storage Systems | Battery Backup Unit (BBU) |
|---|---|
|
Use Scenario: Residential and commercial lithium-based ESS with 12–16 series cells operating in grid-tied or off-grid mode, requiring long-term reliability and precise SoH estimation. IC Role / Device Role: Primary battery monitor and protector - performs real-time cell voltage/current/temperature acquisition, autonomous balancing, and hardware-enforced overvoltage/overcurrent shutdown. Use Value: ±3.0 mV voltage accuracy and <1 µV coulomb counter offset ensure <±1% SoC error over 500+ cycles, extending usable pack lifetime and reducing maintenance frequency. |
Use Scenario: Telecom and datacenter BBUs using 10–14 series LiFePO₄ packs, where fast response to AC failure and zero-downtime switchover are critical. IC Role / Device Role: Safety-critical protector with dual LDOs - monitors pack health during standby, triggers immediate CHG/DSG cutoff on fault, and powers backup controller via REG1/REG2. Use Value: 9.2 µA DEEPSLEEP current and TS2 wake-on-fall capability enable >1-year shelf life with instant recovery - eliminating manual BBU reinitialization after extended outages. |
| E-bike & E-scooter Packs | Cordless Power Tools |
|
Use Scenario: High-power 13–16S e-mobility packs subjected to vibration, thermal cycling, and rapid charge/discharge pulses in consumer-grade vehicles. IC Role / Device Role: Ruggedized monitor with integrated PFET drivers - manages precharge sequencing, detects cell imbalance under load, and drives PCHG/PDSG for safe startup/shutdown. Use Value: 85 V cell-input tolerance and random cell attach support eliminate voltage derating and simplify factory testing - reducing time-to-market for new vehicle platforms. |
Use Scenario: Professional-grade 10–12S cordless tool packs demanding high discharge rates (>30 A), fast charging, and robust fault handling in dusty/moist environments. IC Role / Device Role: Precision protector with secondary chemical fuse drive - monitors current transients during trigger pull, activates FUSE pin for irreversible overcurrent cutoff, and balances cells between uses. Use Value: Simultaneous voltage/current sampling and ±200-mV sense range enable accurate peak-current detection at 50 A+ - preventing MOSFET thermal runaway during stall conditions. |
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 |
|---|---|---|---|
| BQ7697202PFBR | I²C interface (400 kHz), CRC enabled, REG1 LDO default enabled at 3.3 V - lacks SPI support and has fixed communication protocol. | Better suited for MCU-hosted systems with existing I²C infrastructure and no requirement for deterministic SPI timing. | Select BQ7697202PFBR when I²C is preferred and CRC-based data integrity is required; avoid if host requires SPI or flexible LDO disable. |
| BQ76972PFBR | Default I²C interface, CRC disabled, REG1 LDO default disabled - baseline variant with minimal factory configuration. | Appropriate for cost-sensitive designs where communication flexibility and LDO usage are determined in final firmware. | Select BQ76972PFBR for prototyping or multi-variant platforms; BQ7697204PFBR is preferred for production SPI-based systems needing guaranteed CRC and preset LDOs. |
Compared with BQ76972PFBR and BQ7697202PFBR, the BQ7697204PFBR uniquely delivers SPI interface with CRC enabled and REG1 preconfigured to 3.3 V - optimizing it for high-integrity, production-ready BMS implementations where deterministic timing and factory-set power rails reduce validation effort.
Availability
BQ7697204PFBR is available at Aetrix Electronics and suitable for energy storage systems, battery backup units, and e-mobility battery packs requiring stable component supply, long-lifecycle support, and automotive-grade reliability under industrial temperature ranges.
Supply support for BQ7697204PFBR 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 expertise in battery management solutions.
The BQ76972 family was designed specifically for high-accuracy, high-voltage battery packs in industrial and transportation applications - emphasizing measurement fidelity, autonomous protection, and production-line configurability.
FAQ
What communication interface does the BQ7697204PFBR support?
The BQ7697204PFBR supports SPI communication at up to 400 kHz, with pins mapped to SCL (SPI_SCLK), SDA (SPI_MISO), HDQ (SPI_MOSI), and CFETOFF (SPI_CS). Unlike other variants in the family, it does not support I²C or HDQ by default - SPI is its sole primary interface, enabling deterministic, noise-resistant host communication essential for real-time BMS control.
Does the BQ7697204PFBR include built-in cell balancing capability?
Yes, the BQ7697204PFBR integrates autonomous passive cell balancing circuitry with dedicated balancing FETs and timing logic per cell. It supports both host-controlled and autonomous balancing modes, with maximum balancing current of 100 mA per cell. Balancing is configurable via registers and can be triggered based on voltage differentials or scheduled intervals - no external balancing ICs or discrete FETs are required.
What is the operating voltage range for the BQ7697204PFBR's cell voltage inputs (VC0–VC16)?
The BQ7697204PFBR supports up to 85 V absolute maximum on VC0–VC16 pins, enabling direct monitoring of 16-series Li-ion packs (up to ~67.2 V nominal). Per TI's recommended operating conditions, VC(x) inputs tolerate up to VVC(x−1)+5.5 V for x ≥ 5, ensuring safe operation across stacked configurations without external voltage dividers or level shifters - a key enabler for high-cell-count industrial battery packs.
How does the BQ7697204PFBR manage ultra-low-power operation in battery standby mode?
The BQ7697204PFBR offers multiple low-power states: DEEPSLEEP draws just 9.2–10.7 µA (with LFO on/off), while SHUTDOWN consumes only 1–3.1 µA. In DEEPSLEEP, the device retains register contents and supports wake-up via TS2 voltage fall or LD pin transition - allowing rapid resumption of monitoring without full re-initialization. This makes BQ7697204PFBR ideal for battery backup and energy storage applications requiring multi-year shelf life.
Can the BQ7697204PFBR drive high-side NFETs without external components?
Yes, the BQ7697204PFBR integrates a charge pump that generates gate drive voltage above the battery stack voltage, enabling direct high-side NFET control. It drives CHG and DSG outputs with up to 11 V overdrive, and supports PCHG/PDSG for precharge and predischarge sequencing. No external bootstrap capacitors or gate driver ICs are needed - simplifying layout and improving reliability in high-voltage pack designs.
BQ7697204PFBR 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:
- Multi-Chemistry
- Number of Cells:
- 3 ~ 16
- Fault Protection:
- Over Current, Over Temperature, Over/Under Voltage, Short Circuit
- Interface:
- I2C
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TQFP (7x7)
BQ7697204PFBR FAQ
1.How can I place an order for BQ7697204PFBR through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ7697204PFBR 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 BQ7697204PFBR reliable?
The price and inventory of BQ7697204PFBR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ7697204PFBR is usually 5 days.
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Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ7697204PFBR?
BQ7697204PFBR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ7697204PFBR 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 BQ7697204PFBR?
For technical support, including BQ7697204PFBR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ7697204PFBR requirements.
6.How does Aetrix verify that BQ7697204PFBR is sourced from the original manufacturer or authorized distributors?
All BQ7697204PFBR 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 BQ7697204PFBR meets industry standards.
7.What is the process for return or replacement of BQ7697204PFBR?
All BQ7697204PFBR units undergo pre-shipment inspection (PSI). If there is an issue with BQ7697204PFBR, 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 BQ7697204PFBR part is unused and in its original packaging.
Return procedure for BQ7697204PFBR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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