My Inquiry
My Account
Texas Instruments BQ7694003DBTR
- Part No.:
- BQ7694003DBTR
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 44-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
BQ7694003DBTR.pdf
- Description:
- IC BATT MON MULTI 9-15C 44TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,389
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BQ7694003DBTR from Texas Instruments is a 9–15-series Li-ion/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 103AT thermistors, delivers 2.5-V or 3.3-V LDO output, and operates up to 108 V absolute max supply - deployed in 48-V e-bike and UPS battery packs.
For engineers reviewing the BQ7694003DBTR datasheet, BQ7694003DBTR pinout, BQ7694003DBTR application, or BQ7694003DBTR equivalent, this page delivers verified technical context, exact pin functions, real-world protection thresholds (OV/UV/OCD/SCD), thermal shutdown behavior, and validated alternatives for high-voltage industrial battery management systems.
Technical Context
The BQ7694003DBTR implements a multi-rail sensing architecture with segmented cell voltage inputs (VC0–VC15), differential current sense (SRP/SRN), and three independent thermistor bias rails (TS1–TS3). Its dual-ADC system separates cell voltage/temperature measurement (14-bit, ±25 mV accuracy over –40°C to 85°C) from pack current integration (16-bit coulomb counter, ±40 LSB INL).
Hardware protection logic executes independently of host control: OV/UV thresholds are programmable in 16-LSB steps across 0x1000–0x2FF8 ADC range; OCD/SCD detection uses configurable delay timers (8 ms–1280 ms and 35 µs–520 µs respectively) with ±2.5 mV offset tolerance and ±10% scale accuracy.
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-cell monitoring. |
| Supply Voltage Range | 6 V to 25 V on REGSRC; absolute max 108 V on BAT - supports direct connection to high-voltage battery stacks without external regulators. |
| Cell Voltage Accuracy | ±25 mV over full –40°C to 85°C range at 2.0–5.0 V per cell - ensures reliable overvoltage/undervoltage protection decision margins. |
| Coulomb Counter Resolution | 8.44 µV LSB, ±40 LSB integral nonlinearity - provides precise state-of-charge tracking with <0.5% gain drift over temperature. |
| Protection Response Delay | OCD delay selectable from 8 ms to 1280 ms; SCD delay from 35 µs to 520 µs - balances fast fault isolation with noise immunity in motor-driven loads. |
| Thermistor Support | Three independent 103AT thermistor channels (TS1–TS3) with dedicated bias rails (VC5X, VC10X) - enables multi-zone thermal monitoring in large-format packs. |
| Integrated LDO | Configurable 2.5-V or 3.3-V output (REGOUT) with 4.7-µF load capacitance support - powers external microcontrollers or sensors without discrete regulators. |
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 |
|---|---|---|
| VC0–VC15 | Cell voltage sense inputs | Direct analog inputs for 1st cell negative (VC0) through 15th cell positive (VC15); segmented rail structure (VC0–VC5, VC5X–VC10, VC10X–VC15) isolates voltage domains. |
| SRP / SRN | Differential current sense inputs | Accept ±200-mV differential signal across sense resistor; enable 16-bit coulomb counting with 8.44-µV resolution. |
| TS1–TS3 | Thermistor input terminals | Each connects to 10-kΩ 103AT thermistor; biased from dedicated reference rails (VSS, VC5X, VC10X) to avoid ground loop errors. |
| CHG / DSG | Low-side N-channel FET drivers | Open-drain outputs sinking up to 12 V at 10-MΩ load; drive external MOSFET gates directly with 200-µs rise time. |
| REGSRC / REGOUT | LDO input and regulated output | REGSRC accepts 6–25 V input; REGOUT delivers factory-configured 2.5 V or 3.3 V (BQ7694003DBTR = CRC-enabled, 3.3-V LDO). |
| ALERT | Interrupt and override I/O | Active-low open-drain alert output; also accepts boot signal on TS1 to initiate startup sequence within 10 ms. |
Key Features
| Feature | Design Value |
|---|---|
| Random cell connection tolerance | Eliminates strict cell-order wiring requirements - reduces assembly error risk and simplifies field repair in modular battery packs. |
| No EEPROM programming required | Factory-configured I²C address (0x08), LDO voltage (3.3 V), and CRC enablement - eliminates production-line configuration steps and firmware dependencies. |
| SHIP mode ultra-low power state | 0.6–1.8 µA quiescent current - enables multi-year shelf life for pre-assembled battery modules before first use. |
| Integrated cell balancing FETs | 5-mA per-cell balancing current with automatic relaxation timing (12.5 ms) - maintains ≤15-mV inter-cell variance without external components. |
| I²C interface with optional CRC | CRC-8 checksum on all read/write transactions - prevents undetected communication corruption in electrically noisy vehicle or tool environments. |
Applications
| Light Electric Vehicles (eBikes/eScooters) | Energy Storage Systems (ESS) |
|---|---|
|
Use Scenario: 48-V, 15S LiFePO₄ battery pack powering a 500-W hub motor with regenerative braking. IC Role / Device Role / Timing Role: Primary AFE performing real-time cell voltage monitoring, pack current integration, and hardware-triggered discharge FET disable during SCD events. Use Value: 35–520 µs short-circuit response prevents MOSFET destruction during wheel lockup; integrated balancing maintains cycle life >2000 cycles. |
Use Scenario: 48-V, 13S Li-ion backup bank for telecom base station with ambient temperature ranging –20°C to 60°C. IC Role / Device Role / Timing Role: Standalone protector executing OV/UV cutoff, die temperature monitoring, and coulomb-based SOC estimation without host MCU intervention. Use Value: ±25 mV cell voltage accuracy ensures safe operation at temperature extremes; 100°C thermal shutdown prevents thermal runaway propagation. |
| Power Tools (Cordless Drills/Saws) | Uninterruptible Power Supplies (UPS) |
|
Use Scenario: 40-V, 10S+5P Li-ion pack delivering 30-A peak current to brushless motor under stall conditions. IC Role / Device Role / Timing Role: Hardware-enforced overcurrent protection with 8–1280 ms programmable delay, coupled with active cell balancing during idle periods. Use Value: Configurable OCD delay avoids nuisance tripping during motor startup surges while guaranteeing MOSFET survival at 30-A sustained load. |
Use Scenario: 48-V, 14S LiFePO₄ string in 5-kVA online UPS with dual-path redundancy and runtime extension via SOC-aware load shedding. IC Role / Device Role / Timing Role: High-accuracy coulomb counter (±40 LSB INL) feeding host controller for precise remaining runtime prediction. Use Value: 8.44-µV LSB resolution enables <1% SOC error over full discharge curve - critical for graceful failover and maintenance scheduling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery monitor AFE applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ7694002DBTR | 3.3-V LDO output, no CRC enabled - differs only in I²C packet integrity feature. | Lower-security applications where communication corruption risk is minimal (e.g., non-safety-critical consumer tools). | Select when CRC validation adds unnecessary overhead and firmware already handles error recovery. |
| BQ7694001DBTR | 2.5-V LDO output, CRC enabled - identical protection and measurement specs but lower regulator voltage. | Systems requiring 2.5-V logic interface or tighter LDO headroom (e.g., mixed-signal SoCs with 2.5-V I/O banks). | Choose when downstream peripherals mandate 2.5-V supply and CRC remains essential for robustness. |
Compared with BQ7694002DBTR and BQ7694001DBTR, the BQ7694003DBTR uniquely combines 3.3-V LDO regulation with CRC-protected I²C - optimizing for industrial-grade reliability in electric vehicle and grid-tied ESS deployments where both power rail compatibility and communication integrity are mandatory.
Availability
BQ7694003DBTR 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 guaranteed traceable sourcing.
Supply support for BQ7694003DBTR 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 leadership in battery management ICs and high-reliability power solutions.
The BQ769x0 family was designed specifically for high-voltage, high-reliability battery packs in light EVs, power tools, and stationary energy storage - emphasizing hardware-based protection autonomy, ultra-low-power ship mode, and simplified system integration.
FAQ
What is the factory-configured I²C address and LDO voltage for BQ7694003DBTR?
The BQ7694003DBTR ships with a fixed 7-bit I²C address of 0x08 and a 3.3-V LDO output (REGOUT). These settings are permanently stored in factory-programmed EEPROM and cannot be modified in-system. CRC checksum verification is enabled by default for all I²C transactions, ensuring data integrity in electrically noisy environments typical of e-bike or power tool applications.
Does BQ7694003DBTR support thermistor-based temperature monitoring for all 15 cells?
No - the BQ7694003DBTR supports up to three independent 103AT thermistors (TS1, TS2, TS3), each referenced to separate bias rails (VSS, VC5X, VC10X). It does not provide individual temperature sensing per cell; instead, it enables zone-based thermal monitoring - for example, TS1 for top-module cells, TS2 for mid-pack, and TS3 for bottom - which is sufficient for thermal runaway prevention in most 48-V industrial packs.
What is the maximum cell voltage differential the BQ7694003DBTR can measure safely?
The BQ7694003DBTR guarantees safe operation for cell-to-cell differential voltages up to 9 V (VCn–VCn–1), as specified in Absolute Maximum Ratings. This allows reliable monitoring of Li-ion cells with wide-state-of-charge spread (e.g., 3.0 V vs. 4.2 V) and accommodates transient imbalances during fast charging or load transients without input damage or measurement saturation.
How does the BQ7694003DBTR handle cell balancing, and what current does it deliver?
The BQ7694003DBTR integrates internal FETs for passive cell balancing at 5 mA per cell (max), with automatic 12.5-ms relaxation timing before subsequent voltage measurements. Balancing is triggered by host software via register writes and occurs only on selected cells - avoiding unnecessary power dissipation. The design eliminates external balancing resistors and driver transistors, reducing BOM count and PCB area in space-constrained battery modules.
Can BQ7694003DBTR operate without a host microcontroller?
Yes - the BQ7694003DBTR executes core protection functions autonomously: OV, UV, OCD, and SCD responses activate hardware FET drivers (CHG/DSG) without host intervention. While I²C communication is required for configuration and telemetry, critical safety actions remain active even if the host MCU fails or resets - making it suitable for functional-safety-conscious designs like UL 2580-compliant e-bike batteries.
BQ7694003DBTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 44-TFSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- 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
BQ7694003DBTR FAQ
1.How can I place an order for BQ7694003DBTR through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ7694003DBTR 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 BQ7694003DBTR reliable?
The price and inventory of BQ7694003DBTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ7694003DBTR is usually 5 days.
3.What payment methods are accepted for BQ7694003DBTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ7694003DBTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ7694003DBTR?
BQ7694003DBTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ7694003DBTR 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 BQ7694003DBTR?
For technical support, including BQ7694003DBTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ7694003DBTR requirements.
6.How does Aetrix verify that BQ7694003DBTR is sourced from the original manufacturer or authorized distributors?
All BQ7694003DBTR 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 BQ7694003DBTR meets industry standards.
7.What is the process for return or replacement of BQ7694003DBTR?
All BQ7694003DBTR units undergo pre-shipment inspection (PSI). If there is an issue with BQ7694003DBTR, 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 BQ7694003DBTR part is unused and in its original packaging.
Return procedure for BQ7694003DBTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BQ7694003DBTR 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…
