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Texas Instruments BQ7694002DBT
- Part No.:
- BQ7694002DBT
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 44-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
BQ7694002DBT.pdf
- Description:
- IC BATT MON MULTI 9-15C 44TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:505
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Product details
Overview
BQ7694002DBT from Texas Instruments is a 9–15-series Li-ion/LiFePO₄ battery monitor AFE with integrated charge/discharge FET drivers, 3-thermistor support, and I²C interface. It delivers ±15 mV cell voltage accuracy (25°C), 5 mA per-cell balancing current, and hardware-based OV/UV/OCD/SCD protection for 48-V industrial battery packs.
For engineers reviewing the BQ7694002DBT datasheet, BQ7694002DBT pinout, BQ7694002DBT application, or BQ7694002DBT equivalent, this page provides verified technical context, real-world use cases, validated alternatives, and supply-chain support for light EV, ESS, and power tool battery management systems.
Technical Context
The BQ7694002DBT implements a dedicated analog front-end architecture with dual 14-bit ADCs: one for cell voltage/temperature (382 µV LSB) and another for coulomb counting (8.44 µV LSB). Its hierarchical cell sensing supports up to 15 cells across three voltage domains (VSS–VC5x, VC5x–VC10x, VC10x–BAT), enabling random cell connection tolerance without reconfiguration.
Protection logic operates independently of host communication via configurable thresholds and delay timers - OV/UV delays range from 1 s to 8 s, OCD/SCD delays span 8 ms to 1280 ms and 35 µs to 520 µs respectively - while the 3.3-V LDO (REGOUT) powers external circuitry with 4.7 µF output capacitance support.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Cell Count Range | 9–15 series Li-ion or LiFePO₄ cells; supports 48-V nominal battery packs |
| Cell Voltage Accuracy | ±15 mV at 25°C (3.6–4.3 V range); enables precise SOC estimation and cell matching |
| Current Sensing | ±200 mV differential input range; 16-bit coulomb counter with ±2 LSB INL |
| Thermistor Support | Direct interface for three 103AT thermistors (TS1–TS3), each with dedicated bias and ground reference |
| Cell Balancing | Integrated FETs delivering 5 mA per cell; reduces pack imbalance without external components |
| Supply Voltage Range | 6–25 V on REGSRC; absolute max 108 V on BAT–VSS - suitable for high-voltage industrial battery stacks |
| I²C Interface | Standard-mode compatible (100 kHz), with optional CRC; no EEPROM programming required |
Pinout & Package
44-pin TSSOP package (11.00 mm × 4.40 mm × 1.20 mm), RoHS-compliant, lead-free, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DSG / CHG | Discharge/Charge FET gate drivers | Low-side N-channel drivers with 10–14 V output swing; directly control external MOSFETs |
| VC0–VC15 | Cell voltage sense inputs | 44-pin layout accommodates 15-cell stack with domain-separated references (VSS, VC5x, VC10x) |
| SRP / SRN | Current sense differential inputs | Accept ±200 mV differential signal across sense resistor; enable high-accuracy pack current monitoring |
| TS1–TS3 | Thermistor positive terminals | Each referenced to its own ground (VSS, VC5x, VC10x); supports independent thermal zones |
| REGSRC / REGOUT | LDO input and 3.3-V regulated output | REGSRC accepts 6–25 V; REGOUT supplies 3.3 V @ up to 100 mA with 4.7 µF decoupling |
| ALERT | Open-drain interrupt/output | Asserts on protection events or status changes; also serves as boot override input |
Key Features
| Feature | Design Value |
|---|---|
| Random cell connection tolerance | Eliminates need for fixed cell ordering during assembly; reduces manufacturing complexity and field service time |
| SHIP mode ultra-low power state | 0.6–1.8 µA quiescent current; enables multi-year storage without pack discharge or maintenance charging |
| Hardware-based protection independence | OV/UV/OCD/SCD triggers execute autonomously without host MCU involvement - critical for safety-critical shutdown |
| No EEPROM programming required | Factory-configured I²C address (0x08), LDO voltage (3.3 V), and CRC option; simplifies BOM and firmware integration |
| Three-domain voltage sensing | Supports 15-cell stacks using three isolated sense domains (VSS–VC5x, VC5x–VC10x, VC10x–BAT), improving noise immunity and layout flexibility |
Applications
| Light Electric Vehicles (eBikes/eScooters) | Energy Storage Systems (ESS) |
|---|---|
|
Use Scenario: 48-V, 12–15S lithium battery pack powering mid-drive eBike motor with regenerative braking. IC Role / Device Role / Timing Role: Primary AFE performing real-time cell voltage monitoring, pack current integration, and autonomous overcurrent shutdown during fault conditions. Use Value: Enables precise SOC/SOH tracking across 15 cells and immediate SCD response (<100 µs) to prevent MOSFET failure during regen spikes. |
Use Scenario: Residential 48-V LiFePO₄ ESS with active thermal management and grid-tied inverter interface. IC Role / Device Role / Timing Role: Central battery monitor handling voltage balancing, three-zone temperature supervision (cell, busbar, enclosure), and protection coordination. Use Value: Integrated 5 mA per-cell balancing maintains <5 mV inter-cell variance over 500+ cycles; thermistor domain isolation prevents cross-zone thermal crosstalk. |
| Power Tools (Cordless Drills/Saws) | Uninterruptible Power Supplies (UPS) |
|
Use Scenario: 10S–12S high-drain Li-ion pack for professional-grade cordless impact driver with burst current >60 A. IC Role / Device Role / Timing Role: Hardware-level OCD/SCD protector triggering within 8–1280 ms based on configurable thresholds; relieves host MCU of real-time fault response. Use Value: 100 mV OCD threshold resolution (2.78 mV/step) allows precise trip point tuning to avoid nuisance trips during torque surges. |
Use Scenario: Rack-mounted 48-V UPS with dual battery strings, runtime extension, and cold-start capability. IC Role / Device Role / Timing Role: Dual-role AFE providing pack voltage/current telemetry to system controller while enforcing UV lockout at 36 V (9×4.0 V) with 8-s delay. Use Value: 4.3 V/cell UV threshold accuracy (±15 mV) ensures consistent low-voltage cutoff across aging cells, extending usable capacity by ~3% per cycle. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery monitor AFE applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ7694000DBT | 2.5-V REGOUT instead of 3.3 V; same I²C address (0x08) and cell count (9–15S) | Requires external level-shifting for 3.3-V host interfaces; unsuitable where 3.3-V rail must be sourced from AFE | Select BQ7694000DBT only when system already provides 2.5-V logic supply and no LDO sourcing is needed. |
| BQ7694003DBT | Includes CRC enabled on I²C interface; identical electrical specs and pinout | Enhances data integrity in electrically noisy environments (e.g., motor drives, inverters); adds minor firmware overhead | Choose BQ7694003DBT for EMI-prone applications where packet corruption risk exceeds software CRC implementation cost. |
Compared with BQ7694000DBT and BQ7694003DBT, the BQ7694002DBT offers optimal balance: factory-set 3.3-V LDO eliminates external regulator needs, while omitting CRC reduces firmware complexity - ideal for cost-sensitive, moderate-noise industrial battery packs.
Availability
BQ7694002DBT is available at Aetrix Electronics and suitable for light electric vehicles, energy storage systems, and cordless power tools requiring stable component supply, long-lifecycle support, and automotive-grade reliability under –40°C to +85°C operation.
Supply support for BQ7694002DBT 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 ICs.
The BQ769x0 product line targets high-reliability, high-voltage battery packs in light EVs, ESS, and industrial tools - designed for minimal external components, hardware autonomy, and robust operation across extended temperature ranges.
FAQ
What is the maximum supported cell count for the BQ7694002DBT?
The BQ7694002DBT supports 9–15 series-connected cells, making it suitable for 48-V nominal Li-ion or LiFePO₄ battery packs. Its three-domain sensing architecture (VSS–VC5x, VC5x–VC10x, VC10x–BAT) enables accurate measurement across the full stack without external multiplexing or calibration.
Does the BQ7694002DBT require external EEPROM programming?
No, the BQ7694002DBT does not require external EEPROM programming. Texas Instruments preconfigures the device with fixed parameters including I²C address (0x08), REGOUT voltage (3.3 V), and CRC option (disabled). These settings are permanently stored and cannot be modified in the field.
How does the BQ7694002DBT handle thermistor connections for multi-zone thermal monitoring?
The BQ7694002DBT supports three independent thermistor inputs (TS1, TS2, TS3), each referenced to a different ground domain: TS1 to VSS, TS2 to VC5x, and TS3 to VC10x. This domain isolation prevents thermal crosstalk and enables accurate, simultaneous monitoring of cell, mid-pack, and top-pack temperatures.
What protection features are implemented in hardware versus firmware on the BQ7694002DBT?
The BQ7694002DBT implements OV, UV, OCD, and SCD protections entirely in hardware - they trigger autonomously without host MCU intervention. Secondary protector fault detection and alert signaling are also hardware-driven, ensuring fail-safe response even if the host controller is unresponsive or powered down.
Can the BQ7694002DBT operate in ultra-low-power storage mode?
Yes, the BQ7694002DBT supports SHIP mode with typical supply current of 0.6–1.8 µA. In this state, only the boot detector and bandgap remain active, allowing multi-year battery storage without significant self-discharge - ideal for pre-deployed modules and spare packs.
BQ7694002DBT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 44-TFSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Battery Monitor
- Battery Chemistry:
- Multi-Chemistry
- Number of Cells:
- 9 ~ 15
- Fault Protection:
- Over Current, Over/Under Voltage, Short Circuit
- Interface:
- I2C
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 44-TSSOP
BQ7694002DBT FAQ
1.How can I place an order for BQ7694002DBT through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ7694002DBT 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 BQ7694002DBT reliable?
The price and inventory of BQ7694002DBT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ7694002DBT is usually 5 days.
3.What payment methods are accepted for BQ7694002DBT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ7694002DBT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ7694002DBT?
BQ7694002DBT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ7694002DBT 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 BQ7694002DBT?
For technical support, including BQ7694002DBT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ7694002DBT requirements.
6.How does Aetrix verify that BQ7694002DBT is sourced from the original manufacturer or authorized distributors?
All BQ7694002DBT 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 BQ7694002DBT meets industry standards.
7.What is the process for return or replacement of BQ7694002DBT?
All BQ7694002DBT units undergo pre-shipment inspection (PSI). If there is an issue with BQ7694002DBT, 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 BQ7694002DBT part is unused and in its original packaging.
Return procedure for BQ7694002DBT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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