My Inquiry
My Account
Texas Instruments BQ7694003DBT
- Part No.:
- BQ7694003DBT
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 44-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
BQ7694003DBT.pdf
- Description:
- IC BATT MON MULTI 9-15C 44TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:13,483
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BQ7694003DBT from Texas Instruments is a 9–15-series Li-ion/LiFePO₄ battery monitor AFE with integrated cell balancing FETs, low-side charge/discharge drivers, and dual 14-bit/16-bit ADCs for voltage, temperature, and coulomb counting. It supports up to three 103AT thermistors, delivers 2.5-V or 3.3-V LDO output, and operates up to 108 V absolute max supply-designed for 48-V industrial battery packs in e-scooters and energy storage systems.
For engineers reviewing the BQ7694003DBT datasheet, BQ7694003DBT pinout, BQ7694003DBT application, or BQ7694003DBT equivalent, key selection criteria include its 44-pin TSSOP package, I²C interface with CRC option, random cell connection tolerance, ultra-low-power SHIP mode (0.6–1.8 µA), and hardware-based overvoltage/undervoltage/overcurrent protection with programmable delays.
Technical Context
The BQ7694003DBT 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 system separates cell voltage/temperature measurement (14-bit, ±10 mV accuracy at 25°C) from pack current sensing (16-bit coulomb counter, ±2 LSB INL, 8.44 µV LSB).
Hardware protection logic runs independently of host communication: OV/UV thresholds are set via register-programmable ADC codes (step size 16 LSB), while OCD/SCD detection uses configurable voltage windows across SRP–SRN with 35–520 µs response latency. The device includes dedicated thermistor biasing (10 kΩ pull-up, ±0.3 kΩ drift) and supports boot-triggered initialization via TS1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Cell Count Support | 9–15 series Li-ion or LiFePO₄ cells-enables 48-V nominal battery packs with full per-cell voltage monitoring. |
| ADC Resolution | 14-bit cell voltage/temperature ADC (±10 mV accuracy at 25°C) + 16-bit coulomb counter ADC (±2 LSB INL, 8.44 µV LSB). |
| Supply Voltage Range | 6–25 V on REGSRC; absolute max 108 V on BAT–VSS-supports high-voltage industrial battery stacks with robust fault margin. |
| Protection Thresholds | OV/UV programmable in 16-LSB steps; OCD/SCD thresholds adjustable from 8–200 mV across SRP–SRN with 35–520 µs response. |
| Current Consumption | 0.6–1.8 µA in SHIP mode; 40–195 µA in NORMAL mode depending on ADC/CC enable state-enables multi-year battery standby life. |
| LDO Output | Configurable 2.5-V or 3.3-V regulated output (REGOUT) with 4.7 µF load capacitance support-powers external microcontrollers or sensors. |
| Interface | I²C-compatible with optional CRC, no EEPROM programming required-simplifies firmware integration and eliminates factory calibration steps. |
Pinout & Package
44-pin TSSOP (DBT) package, 11.00 mm × 4.40 mm × 1.20 mm body size, lead pitch 0.65 mm. Thermal resistance RθJA = 70.1°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DSG / CHG | Low-side N-channel FET drivers | Directly control external discharge/charge MOSFETs; output swing tracks REGSRC voltage (10–14 V typical). |
| VC0–VC15 | Cell voltage sense inputs | Segmented domain inputs: VC0–VC5 referenced to VSS; VC5x–VC10 to VC5x; VC10x–VC15 to VC10x-enables 15S monitoring without level shifters. |
| SRP / SRN | Current sense differential inputs | Measure pack current via external shunt; supports ±200 mV input range with 16-bit resolution and <500 µs conversion time. |
| TS1–TS3 | Thermistor inputs | Three independent thermistor channels with internal 10 kΩ bias; each referenced to local ground (VSS, VC5x, VC10x) for noise immunity. |
| ALERT | Open-drain interrupt/output | Asserts on protection events (OV/UV/OCD/SCD); also accepts override signal to force wake-up from SHIP mode. |
| REGSRC / REGOUT | LDO input/output | REGSRC accepts 6–25 V input; REGOUT delivers stable 2.5 V or 3.3 V (configurable by part number) with up to 100 mA capability. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Cell Balancing | Internal 5-mA per-cell balancing FETs eliminate need for external balancing circuits-reduces BOM count and PCB area in 15S packs. |
| Random Cell Connection | Supports arbitrary physical cell interconnect order without reconfiguration-simplifies mechanical design and field servicing of battery modules. |
| SHIP Mode Ultra-Low Power | 0.6–1.8 µA quiescent current with only boot detector active-enables >10-year shelf life for sealed industrial battery packs. |
| Triple Thermistor Support | Dedicated bias and reference for TS1 (VSS), TS2 (VC5x), TS3 (VC10x)-enables precise thermal gradient monitoring across large-format battery assemblies. |
| No EEPROM Programming | All configuration stored in volatile registers; default settings applied at power-on-removes factory programming step and enables runtime reconfiguration. |
Applications
| e-Scooter Battery Packs | Energy Storage Systems (ESS) |
|---|---|
|
Use Scenario: 48-V, 15S LiFePO₄ battery pack powering 500–1000-W hub motor with regenerative braking. IC Role / Device Role / Timing Role: Primary AFE performing real-time cell voltage balancing, pack current integration, and thermal gradient monitoring across three zones. Use Value: Prevents cell imbalance-induced capacity loss during repeated charge/discharge cycles; enables accurate state-of-charge estimation within ±2% over 500+ cycles. |
Use Scenario: 48-V residential ESS using 15S LiFePO₄ modules with CAN-connected BMS controller. IC Role / Device Role / Timing Role: Local analog front-end handling cell-level protection, voltage/temperature acquisition, and coulomb counting-offloading computation from host MCU. Use Value: Hardware-enforced OV/UV shutdown (<10 ms response) prevents thermal runaway during grid-spike events; SHIP mode extends idle-life beyond 15 years. |
| Industrial Power Tools | Uninterruptible Power Supplies (UPS) |
|
Use Scenario: 40-V cordless drill pack with 10S–12S Li-ion cells and high-pulse discharge (≥30 A). IC Role / Device Role / Timing Role: Fast-response protector triggering SCD within 35–105 µs during accidental short-circuit events at tool terminals. Use Value: Eliminates need for external fast-acting fuses; maintains tool operational readiness by avoiding false trips during normal high-current bursts. |
Use Scenario: Rack-mounted 48-V UPS with 15S Li-ion backup battery and dual-path redundancy. IC Role / Device Role / Timing Role: Independent safety monitor verifying cell voltage integrity during AC-fail transitions and validating pack health before inverter engagement. Use Value: Guarantees fail-safe isolation of degraded cells prior to critical load transfer-meeting UL 1973 and IEC 62619 functional safety requirements. |
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 configured for 2.5-V LDO output and no CRC on I²C interface. | Suitable for cost-sensitive designs where CRC validation is unnecessary and 2.5-V rail suffices for host MCU. | Select BQ7694000DBT when CRC is not required and system uses 2.5-V logic; BQ7694003DBT adds CRC and 3.3-V LDO flexibility. |
| MAX17853 | 14-channel monitor (max 14S), 3.3-V fixed LDO, SPI interface, no integrated balancing FETs-requires external balancing circuitry. | Targeted at automotive ASIL-B systems with SPI master requirement and higher channel density per package. | Choose MAX17853 for SPI-based BMS architectures needing ASIL-B compliance; BQ7694003DBT offers lower system cost via integrated balancing and I²C simplicity. |
Compared with BQ7694000DBT, BQ7694003DBT provides CRC-enabled I²C communication and 3.3-V LDO output-critical for noise-prone industrial environments and mixed-voltage systems. Against MAX17853, it reduces bill-of-materials by integrating balancing FETs and simplifies firmware via I²C, though supports one fewer cell than MAX17853's 14S limit.
Availability
BQ7694003DBT is available at Aetrix Electronics and suitable for light electric vehicles, industrial energy storage systems, and uninterruptible power supplies requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
Supply support for BQ7694003DBT 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 product line targets high-power, high-cell-count battery packs for industrial and transportation applications-designed to replace discrete protection circuits with integrated, programmable, and ultra-low-power AFE functionality.
FAQ
What is the maximum cell count supported by the BQ7694003DBT?
The BQ7694003DBT supports 9–15 series cells, enabling direct monitoring of 48-V nominal Li-ion or LiFePO₄ battery packs. Its segmented voltage domain architecture (VC0–VC5, VC5x–VC10, VC10x–VC15) eliminates the need for external level shifters in 15S configurations. This capability is confirmed in the device comparison table and pin diagram documentation for the BQ76940 family.
Does the BQ7694003DBT include integrated cell balancing FETs?
Yes, the BQ7694003DBT integrates internal cell balancing FETs rated for 5 mA per cell-verified in the "Additional features" section and electrical characteristics table. These FETs reduce external component count and simplify PCB layout for passive balancing in high-cell-count packs, distinguishing it from alternatives like the MAX17853 that require external balancing components.
What LDO output voltage does the BQ7694003DBT provide?
The BQ7694003DBT delivers a 3.3-V regulated output on the REGOUT pin, as specified in the device comparison table where "BQ7694003DBT" is explicitly listed under the "LDO (V)" column with value "3.3". This differs from BQ7694000DBT (2.5 V) and enables direct powering of 3.3-V microcontrollers or sensors without external regulators.
How does the BQ7694003DBT handle thermistor connections?
The BQ7694003DBT supports three independent thermistor inputs (TS1, TS2, TS3), each with dedicated internal 10 kΩ pull-up bias and referenced to separate ground domains: TS1 to VSS, TS2 to VC5x, and TS3 to VC10x. This architecture minimizes noise coupling in large battery packs and is documented in the pin functions table and recommended operating conditions section.
What protection features are implemented in hardware on the BQ7694003DBT?
The BQ7694003DBT implements five hardware-based protections: overvoltage (OV), undervoltage (UV), overcurrent in discharge (OCD), short circuit in discharge (SCD), and secondary protector fault detection. All operate autonomously without host intervention, with programmable thresholds and delay timers-detailed in the "Hardware protection features" list and electrical characteristics tables for OV/UV/OCD/SCD parameters.
BQ7694003DBT 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
BQ7694003DBT FAQ
1.How can I place an order for BQ7694003DBT through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ7694003DBT 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 BQ7694003DBT reliable?
The price and inventory of BQ7694003DBT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ7694003DBT is usually 5 days.
3.What payment methods are accepted for BQ7694003DBT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ7694003DBT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ7694003DBT?
BQ7694003DBT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ7694003DBT 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 BQ7694003DBT?
For technical support, including BQ7694003DBT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ7694003DBT requirements.
6.How does Aetrix verify that BQ7694003DBT is sourced from the original manufacturer or authorized distributors?
All BQ7694003DBT 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 BQ7694003DBT meets industry standards.
7.What is the process for return or replacement of BQ7694003DBT?
All BQ7694003DBT units undergo pre-shipment inspection (PSI). If there is an issue with BQ7694003DBT, 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 BQ7694003DBT part is unused and in its original packaging.
Return procedure for BQ7694003DBT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BQ7694003DBT Tags
-
BQ29700DSER
Texas Instruments
-
S-8241ABKMC-GBKT2G
ABLIC Inc.
-
S-8241ABPMC-GBPT2G
ABLIC Inc.
-
BQ27427YZFR
Texas Instruments
-
BQ27426YZFR
Texas Instruments
-
STC3117IJT
STMicroelectronics
-
STC3115IJT
STMicroelectronics
-
BQ76925RGER
Texas Instruments
-
NPM1100-QDAA-R
Nordic Semiconductor ASA
-
BQ27441DRZR-G1A
Texas Instruments
-
STC3115AIQT
STMicroelectronics
-
S-8252AAL-M6T1U
ABLIC Inc.
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
