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Texas Instruments BQ7697202PFBR
- Part No.:
- BQ7697202PFBR
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 48-TQFP
- Datasheet:
-
BQ7697202PFBR.pdf
- Description:
- 3S-TO-16S HIGH-ACCURACY BATTERY
- Quantity:
- Payment:
- Shipping:
Inventory:896
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Product details
Overview
BQ7697202PFBR from Texas Instruments is a high-accuracy battery monitor and protector IC for 3- to 16-series Li-ion, Li-polymer, and LiFePO4 battery packs. It delivers ±3.0 mV cell voltage measurement accuracy, supports autonomous or host-controlled cell balancing, integrates high-side NFET charge-pump drivers, and operates with supply current as low as 1 µA in SHUTDOWN mode. It is deployed in energy storage systems requiring precise cell-level monitoring and robust overvoltage/overcurrent/overtemperature protection.
For engineers reviewing the BQ7697202PFBR datasheet, BQ7697202PFBR pinout, BQ7697202PFBR application, or BQ7697202PFBR equivalent, key selection criteria include its 48-pin TQFP (PFB) package, dual ADC architecture enabling simultaneous voltage/current sampling, ±200-mV current-sense range, integrated OTP memory, and support for I²C (400 kHz), SPI, and HDQ communication interfaces.
Technical Context
The BQ7697202PFBR implements two independent ADCs: one dedicated to high-accuracy coulomb counting (input offset error < 1 µV typical) and another for cell voltage acquisition. Its protection subsystem uses comparator-based thresholds with configurable delays for voltage, temperature, and current faults, plus internal diagnostics including cell open-wire detection and thermistor fault monitoring.
It features an integrated charge pump supporting high-side NFET drive at up to 11 V overdrive, dual programmable LDOs (REG1 and REG2, each configurable for 1.8 V–5.0 V), and a flexible multirail power architecture enabling operation across 4.7 V–80 V pack voltages while maintaining functional integrity under random cell-attach conditions during manufacturing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Cell Count Support | 3- to 16-series Li-ion/LiFePO4 stacks - enables direct monitoring of high-voltage battery packs without external multiplexing. |
| Cell Voltage Accuracy | ±3.0 mV - ensures reliable overvoltage/undervoltage protection triggering within tight safety margins. |
| Coulomb Counter Offset | < 1 µV (typical) - minimizes integration drift in long-duration current measurement for accurate state-of-charge estimation. |
| Sense Range | ±200 mV across sense resistor - accommodates wide-current applications from low-power standby to high-discharge tools. |
| Supply Current (NORMAL) | 286 µA - sustains full monitoring, protection, and communication functionality with minimal pack drain. |
| Supply Current (SHUTDOWN) | 1 µA - preserves battery life during extended storage or system sleep with only TS2 wakeup active. |
| Communication Interfaces | I²C (400 kHz), SPI, HDQ - provides flexibility for host MCU interface selection and noise-immune single-wire debugging. |
| High-Voltage Tolerance | 85 V on VCx, PACK, LD pins - eliminates need for external level-shifting in >60 V ESS and industrial battery systems. |
Pinout & Package
Package: 48-pin TQFP (PFB), 7 mm × 7 mm body size, exposed thermal pad (not electrically connected). Designed for surface-mount assembly and thermal dissipation in compact battery management modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VC0–VC16 | Cell voltage sense inputs | Direct analog inputs for 16-cell stack monitoring; VC0 = bottom reference, VC16 = top-of-stack; also serve as balance current return paths. |
| SRP / SRN | Coulomb counter differential inputs | Accept ±200 mV differential voltage across sense resistor; enable high-precision current integration with sub-µV offset. |
| CHG / DSG | NMOS FET drive outputs | High-voltage gate drivers (up to 85 V) for charge/discharge MOSFETs; support 11 V overdrive for low-RDS(on) FET control. |
| PCHG / PDSG | PFET precharge/predischarge drivers | Charge-pump-assisted outputs enabling safe pre-charge sequencing and soft-start in high-voltage packs. |
| REG1 / REG2 | Programmable LDO outputs | Configurable 1.8 V–5.0 V outputs for powering external MCUs, sensors, or peripherals; reduce need for discrete regulators. |
| ALERT / SCL / SDA / HDQ | Multi-function communication pins | Support I²C, SPI, or HDQ protocols on shared pins; ALERT doubles as interrupt output or HDQ data line for minimal footprint. |
| TS1–TS3 | Thermistor/ADC inputs | Three dedicated analog inputs for external NTC/PTC thermistors or general-purpose ADC measurements; TS2 supports wake-from-SHUTDOWN. |
| RST_SHUT | Digital input control | Active-low input to force device into SHUTDOWN mode or reset internal logic; compatible with standard GPIO levels. |
Key Features
| Feature | Design Value |
|---|---|
| Autonomous cell balancing | On-chip balancing control logic eliminates host MCU dependency for passive balancing across all 16 cells. |
| Integrated secondary chemical fuse drive | Direct drive signal for external fusible links enables redundant overcurrent protection beyond FET-based cutoff. |
| Tolerant random cell attach sequence | Hardware-level sequencing immunity allows production-line cell stacking without strict order constraints or firmware reconfiguration. |
| One-time-programmable (OTP) memory | Customer-programmable nonvolatile storage for calibration data, configuration defaults, or security keys during final test. |
| Dual independent ADCs | Simultaneous voltage and current sampling prevents timing skew between SOC and SOH calculations in dynamic load conditions. |
| Multiple ultra-low-power modes | DEEPSLEEP (9–10 µA) and SHUTDOWN (1 µA) modes extend shelf life and reduce quiescent drain in always-connected BMS designs. |
Applications
| Energy Storage Systems | Battery Backup Units |
|---|---|
Use Scenario: Residential and commercial lithium-based ESS with 10–16 series cells operating at 48–72 V nominal. IC Role / Device Role / Timing Role: Primary battery monitor and protector managing cell balancing, voltage/temperature/current protection, and host communication via I²C. Use Value: ±3.0 mV voltage accuracy ensures compliance with UL 1973 and IEC 62619 safety thresholds for overvoltage shutdown. | Use Scenario: Telecom and datacenter UPS systems requiring high-reliability backup power with fast fault response. IC Role / Device Role / Timing Role: Real-time coulomb counting and autonomous protection supervisor; alerts host on capacity degradation or thermal runaway precursors. Use Value: Dual ADC architecture enables simultaneous current integration and cell voltage sampling-critical for accurate runtime prediction during brownout events. |
| E-bikes & LEVs | Cordless Power Tools |
Use Scenario: Mid- to high-voltage e-bike and e-scooter packs (13–16S Li-ion) subject to vibration, temperature cycling, and regenerative braking. IC Role / Device Role / Timing Role: Integrated protector executing fast overcurrent shutdown (< 1 ms) and cell-level thermal monitoring using up to nine external thermistors. Use Value: High-side charge-pump NFET drivers support 11 V gate overdrive-ensuring robust FET turn-on even at low pack voltage during cold starts. | Use Scenario: High-power cordless drills, saws, and garden tools with 10–16S Li-ion packs demanding rapid transient response and ruggedness. IC Role / Device Role / Timing Role: Central BMS IC performing real-time cell balancing, coulomb counting, and protection with autonomous recovery from overtemperature faults. Use Value: Integrated OTP memory stores factory-calibrated parameters-eliminating post-assembly calibration and reducing production test time. |
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 |
|---|---|---|---|
| BQ7697204PFBR | Same silicon die but configured for SPI interface with CRC enabled and REG1 LDO default-enabled at 3.3 V. | Preferred where host MCU lacks I²C hardware or requires deterministic SPI timing for safety-critical logging. | Select BQ7697204PFBR when SPI is mandatory and CRC validation is required for firmware update integrity. |
| BQ7695202PFR | Lower-channel variant (up to 10-series); lacks VC11–VC16 pins, reduced current-sense bandwidth, and no HDQ interface. | Suitable for cost-sensitive 3–10S applications like portable medical devices or lower-voltage drones where 16S capability is unnecessary. | Choose BQ7695202PFR only if pack voltage ≤ 42 V and system does not require HDQ debug or >10-cell monitoring. |
Compared with BQ7697204PFBR, the BQ7697202PFBR offers native I²C compatibility and simpler initialization for resource-constrained hosts; versus BQ7695202PFR, it provides full 16S scalability, HDQ one-wire debug, and higher-accuracy coulomb counting-making it essential for >60 V ESS and industrial LEV platforms.
Availability
BQ7697202PFBR is available at Aetrix Electronics and suitable for energy storage systems, battery backup units, and e-mobility applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing for safety-critical BMS designs.
Supply support for BQ7697202PFBR 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 monitoring in industrial and transportation applications-emphasizing functional safety, autonomous protection, and production-line robustness for 3–16S Li-based packs.
FAQ
What communication interfaces does the BQ7697202PFBR support?
The BQ7697202PFBR supports I²C at up to 400 kHz, SPI, and HDQ one-wire interface-all accessible via shared pins (SCL/SDA/ALERT/HDQ). Its I²C implementation includes standard addressing and register mapping per TI's BQ76972 documentation. The BQ7697202PFBR variant has CRC enabled and REG1 LDO default-enabled at 3.3 V, distinguishing it from other family members.
Does the BQ7697202PFBR support autonomous cell balancing without host intervention?
Yes, the BQ7697202PFBR includes on-chip autonomous balancing control logic that manages passive balancing across all monitored cells (VC0–VC16) using internal timers and voltage thresholds. Balancing can be enabled or disabled via configuration registers, and the BQ7697202PFBR supports both host-triggered and fully autonomous modes depending on system requirements.
What is the maximum pack voltage the BQ7697202PFBR can monitor?
The BQ7697202PFBR supports pack voltages up to 80 V in normal operation, with absolute maximum ratings allowing 85 V on VCx, PACK, and LD pins. When the internal charge pump is active (for high-side FET drive), VBAT must be derated to ensure CP1, CHG, and DSG voltages remain within their 85 V absolute max-typically limiting operational VBAT to ~60 V in 11 V overdrive mode.
How does the BQ7697202PFBR handle thermistor inputs and temperature monitoring?
The BQ7697202PFBR supports up to nine external thermistors via three dedicated pins (TS1, TS2, TS3), each configurable as thermistor input or general-purpose ADC channel. TS2 additionally functions as a wakeup source from SHUTDOWN mode. Internal temperature sensing is also provided. All thermistor measurements use the same high-accuracy ADC subsystem as cell voltage readings, ensuring consistent calibration and resolution.
What power modes does the BQ7697202PFBR offer, and what are their typical current draws?
The BQ7697202PFBR offers NORMAL (286 µA), multiple SLEEP options (24–41 µA), multiple DEEPSLEEP options (9–10.7 µA), and SHUTDOWN (1–3.1 µA) modes. Each mode disables specific blocks-e.g., DEEPSLEEP retains LFO clock and REG1 output but suspends ADC conversions and protection monitoring-allowing fine-grained trade-offs between responsiveness and quiescent current in the BQ7697202PFBR design.
BQ7697202PFBR 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)
BQ7697202PFBR FAQ
1.How can I place an order for BQ7697202PFBR through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ7697202PFBR 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 BQ7697202PFBR reliable?
The price and inventory of BQ7697202PFBR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ7697202PFBR is usually 5 days.
3.What payment methods are accepted for BQ7697202PFBR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ7697202PFBR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ7697202PFBR?
BQ7697202PFBR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ7697202PFBR 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 BQ7697202PFBR?
For technical support, including BQ7697202PFBR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ7697202PFBR requirements.
6.How does Aetrix verify that BQ7697202PFBR is sourced from the original manufacturer or authorized distributors?
All BQ7697202PFBR 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 BQ7697202PFBR meets industry standards.
7.What is the process for return or replacement of BQ7697202PFBR?
All BQ7697202PFBR units undergo pre-shipment inspection (PSI). If there is an issue with BQ7697202PFBR, 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 BQ7697202PFBR part is unused and in its original packaging.
Return procedure for BQ7697202PFBR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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