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Texas Instruments BQ7694006DBT
- Part No.:
- BQ7694006DBT
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 44-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
BQ7694006DBT.pdf
- Description:
- IC BATT MON MULTI 9-15C 44TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:277
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Product details
Overview
BQ7694006DBT from Texas Instruments is a 9–15-series Li-ion and LiFePO₄ battery monitor AFE with integrated cell balancing FETs, low-side charge/discharge FET drivers, and dual 14-bit/16-bit ADCs for voltage, temperature, and coulomb counting. It supports up to three thermistors (103AT), delivers 2.5-V LDO output, and operates up to 108 V absolute max supply - used in 48-V e-bike and UPS battery packs.
For engineers reviewing the BQ7694006DBT datasheet, BQ7694006DBT pinout, BQ7694006DBT application, or BQ7694006DBT equivalent, key selection criteria include its 44-pin TSSOP package, I²C address 0x18 (preprogrammed), no-EEPROM configuration, random-cell connection tolerance, and hardware-based OV/UV/OCD/SCD protection with programmable delays.
Technical Context
The BQ7694006DBT implements a multi-rail sensing architecture with segmented voltage domains (VC0–VC5, VC5x–VC10, VC10x–VC15) enabling direct monitoring of up to 15 series cells without external level shifters. Its dual ADC subsystem includes a 14-bit cell voltage/temperature converter (±25 mV accuracy over –40°C to 85°C) and a 16-bit coulomb counter (±2 LSB INL, ±0.5% gain error).
Hardware protection logic executes independently of host control: OV/UV thresholds are set via 12-bit registers with 16-LSB step resolution; OCD/SCD detection uses differential sense inputs (SRP/SRN) with configurable thresholds (8–100 mV OCD, 22–200 mV SCD) and delay options from 8 ms to 1280 ms.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Cell Count Support | 9–15 series Li-ion/LiFePO₄ cells - enables 36–60 V nominal pack designs like 48-V e-scooter batteries. |
| I²C Address | Fixed 7-bit address 0x18 - eliminates address conflict risk in multi-device systems; no software configuration required. |
| ADC Accuracy | ±25 mV cell voltage error (–40°C to 85°C) - ensures reliable OV/UV fault detection within safety margins. |
| Cell Balancing Current | 5 mA per cell (internal FET) - sufficient for passive balancing in high-capacity industrial packs with low self-discharge mismatch. |
| Supply Voltage Range | 6 V to 25 V on REGSRC; up to 108 V absolute max on BAT - supports direct connection to high-voltage battery stacks without external regulators. |
| Thermistor Support | Three independent 103AT thermistor inputs (TS1–TS3) with dedicated bias rails (VC0, VC5x, VC10x) - enables distributed thermal monitoring across large-format packs. |
| Protection Delay Resolution | OV/UV delays configurable in 1/4/8/16 s steps; OCD delays from 8 ms to 1280 ms - allows precise coordination with external FET response times and system fault recovery policies. |
Pinout & Package
Package: 44-pin TSSOP (DBT), 11.00 mm × 4.40 mm body size, 1.2 mm height - compatible with standard automated PCB assembly and provides thermal performance of RθJA = 70.1°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VC0–VC15 | Cell voltage sense inputs | Segmented rail inputs (VC0–VC5, VC5x–VC10, VC10x–VC15) enable direct 15-cell monitoring without external level shifters or isolation. |
| SRP / SRN | Differential current sense inputs | Accept ±200 mV differential signal from sense resistor - supports high-accuracy coulomb counting and fast OCD/SCD detection. |
| CHG / DSG | Low-side N-channel FET drivers | Drive external MOSFET gates with 10–14 V output (REGSRC ≥12 V); rise time ≤250 µs into 10 nF load. |
| REGSRC / REGOUT | LDO input/output | REGSRC accepts 6–25 V input; REGOUT delivers regulated 2.5 V (±2%) at up to 10 mA for MCU or sensor power. |
| TS1–TS3 | Thermistor bias and sense | Three independent thermistor channels with dedicated bias rails (VSS, VC5x, VC10x) - prevents crosstalk in multi-zone thermal management. |
| ALERT | Open-drain interrupt output | Asserts low on OV/UV/OCD/SCD/fault events; also accepts override input for manual reset or forced shutdown. |
Key Features
| Feature | Design Value |
|---|---|
| Random cell connection tolerance | Eliminates strict physical cell order requirements during pack assembly - reduces manufacturing complexity and rework. |
| No EEPROM programming | All configuration (I²C address, LDO voltage) factory-programmed and immutable - ensures consistent behavior across production batches. |
| SHIP mode ultra-low power | 0.6–1.8 µA quiescent current - extends shelf life of pre-assembled battery packs before first use. |
| Integrated balancing FETs | 5 mA per-cell internal discharge path - removes need for external balancing circuits in cost-sensitive applications. |
| Hardware-only protection logic | OCD/SCD/OV/UV triggers execute autonomously without host MCU intervention - guarantees fail-safe response during communication loss. |
Applications
| e-Bikes & Pedelecs | Energy Storage Systems (ESS) |
|---|---|
|
Use Scenario: 48-V, 15S lithium battery pack powering mid-drive motor with regenerative braking. IC Role / Device Role / Timing Role: Primary AFE performing real-time cell voltage monitoring, pack current integration, and autonomous discharge FET control during overcurrent events. Use Value: Enables compliance with UL 2271 cycle-life and thermal runaway requirements through accurate ±25 mV cell voltage tracking and 35–520 µs SCD response. |
Use Scenario: 48-V residential battery backup unit with active thermal management and grid-tie inverter interface. IC Role / Device Role / Timing Role: Central pack monitor providing coulomb-counted state-of-charge, three-point temperature profiling, and hardware-triggered disconnect on OV/UV faults. Use Value: Supports 10-year warranty cycles by reducing SoC drift via 16-bit coulomb counter (±0.5% gain error) and minimizing calibration burden. |
| Power Tools | Uninterruptible Power Supplies (UPS) |
|
Use Scenario: 12S–15S cordless drill battery with high-pulse discharge (≥30 A) and rapid charge capability. IC Role / Device Role / Timing Role: Hardware protection supervisor enforcing 8–1280 ms OCD delays and 35–520 µs SCD detection to prevent MOSFET avalanche during stall conditions. Use Value: Increases tool runtime reliability by eliminating false trips during torque transients while maintaining sub-100 µs fault isolation. |
Use Scenario: Rack-mounted 48-V UPS with dual-path redundancy and hot-swap battery modules. IC Role / Device Role / Timing Role: Pack-level safety controller executing autonomous UV lockout at 2.5 V/cell and coordinated CHG/DSG FET sequencing during transfer switching. Use Value: Meets IEC 62040-1 availability requirements via deterministic 1–16 s UV delay options and <10 µs alert assertion latency. |
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 | Same 44-TSSOP package and 9–15S support, but fixed I²C address 0x08 and 2.5-V LDO (no CRC option) | Suitable for single-device systems where address collision is not a concern and CRC integrity is optional | Select BQ7694000DBT when simplified I²C topology and reduced firmware overhead outweigh need for address flexibility. |
| BQ7694003DBT | Identical pinout and monitoring features, but factory-configured with 3.3-V LDO output and CRC-enabled I²C interface | Required when host MCU operates at 3.3 V and robust packet integrity is mandatory in noisy industrial environments | Choose BQ7694003DBT for noise-immune communication and direct 3.3-V peripheral powering without external regulator. |
Compared with BQ7694000DBT and BQ7694003DBT, the BQ7694006DBT offers identical 15-cell monitoring capability and thermal performance but uniquely combines I²C address 0x18 with 2.5-V LDO output - optimizing it for multi-AFE systems requiring address diversity and legacy 2.5-V sensor compatibility.
Availability
BQ7694006DBT is available at Aetrix Electronics and suitable for light electric vehicles, energy storage systems, and uninterruptible power supplies requiring stable component supply, long-term lifecycle support, and automotive-grade reliability validation.
Supply support for BQ7694006DBT 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 and embedded processing technologies, with decades of expertise in battery management ICs and high-reliability power solutions.
The BQ769x0 family was designed specifically for high-power, high-cell-count battery packs in light EVs, power tools, and grid-tied ESS - emphasizing hardware autonomy, ultra-low power SHIP mode, and production-ready factory configuration.
FAQ
What is the factory-configured I²C address of the BQ7694006DBT?
The BQ7694006DBT has a permanently programmed 7-bit I²C address of 0x18. This value is stored in factory ROM and cannot be modified in-system or via software. It enables deterministic multi-device addressing in battery packs using multiple BQ76940 devices without bus contention.
Does the BQ7694006DBT support thermistor-based temperature monitoring?
Yes, the BQ7694006DBT supports three independent 103AT thermistors via TS1, TS2, and TS3 pins, each with dedicated bias rails (VSS, VC5x, VC10x). The internal ADC measures thermistor voltage with 14-bit resolution and ±2% accuracy across –40°C to 85°C, enabling precise zone-specific thermal profiling in large-format packs.
What is the maximum cell count supported by the BQ7694006DBT?
The BQ7694006DBT supports 9–15 series-connected cells, covering nominal pack voltages from 36 V to 60 V. Its segmented sensing architecture (VC0–VC5, VC5x–VC10, VC10x–VC15) allows direct monitoring of all 15 cells without external level-shifting circuitry or additional ICs.
Can the BQ7694006DBT perform cell balancing without external components?
Yes, the BQ7694006DBT integrates internal cell balancing FETs delivering 5 mA per cell. This eliminates the need for external balancing resistors or driver transistors in applications where moderate balancing current suffices - such as LiFePO₄ packs with low self-discharge variance.
What protection functions are implemented in hardware on the BQ7694006DBT?
The BQ7694006DBT implements five hardware-based protections: Overvoltage (OV), Undervoltage (UV), Overcurrent in Discharge (OCD), Short Circuit in Discharge (SCD), and secondary protector fault detection. All trigger autonomously without host MCU involvement, with configurable delays and thresholds stored in dedicated registers.
BQ7694006DBT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 44-TFSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- 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
BQ7694006DBT FAQ
1.How can I place an order for BQ7694006DBT through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ7694006DBT 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 BQ7694006DBT reliable?
The price and inventory of BQ7694006DBT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ7694006DBT is usually 5 days.
3.What payment methods are accepted for BQ7694006DBT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ7694006DBT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ7694006DBT?
BQ7694006DBT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ7694006DBT 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 BQ7694006DBT?
For technical support, including BQ7694006DBT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ7694006DBT requirements.
6.How does Aetrix verify that BQ7694006DBT is sourced from the original manufacturer or authorized distributors?
All BQ7694006DBT 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 BQ7694006DBT meets industry standards.
7.What is the process for return or replacement of BQ7694006DBT?
All BQ7694006DBT units undergo pre-shipment inspection (PSI). If there is an issue with BQ7694006DBT, 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 BQ7694006DBT part is unused and in its original packaging.
Return procedure for BQ7694006DBT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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