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About
The BQ7693002DBTR from Texas Instruments is a highly integrated 3- to 5-series lithium battery monitor and protector designed for precision management of Li-ion, Li-polymer, and LiFePO₄ battery packs. It features a 16-bit ADC for accurate voltage, current, and temperature measurements, along with configurable protection against overvoltage (OV), undervoltage (UV), overcurrent (OC), short circuits (SC), and overtemperature (OT). The device supports passive cell balancing with programmable thresholds, ensuring optimal battery health and longevity. Its I²C interface (up to 400 kHz) allows flexible communication with host controllers for real-time monitoring and configuration.
Targeting low-power applications, the BQ7693002DBTR operates with a typical supply current of 40 µA in active mode and drops to <5 µA in sleep mode, making it ideal for energy-sensitive systems like portable tools, e-bikes, and medical devices. The IC includes five external NTC inputs for multi-zone temperature sensing, along with an internal die temperature sensor for comprehensive thermal management. Its 2.5V to 5.5V supply range and 0V to 5V per-cell input flexibility support diverse battery configurations.
Packaged in a compact TSSOP-30 form factor, the device is optimized for space-constrained designs while meeting industrial-grade reliability standards (-40°C to +85°C). It is RoHS compliant, Pb-free, and halogen-free, aligning with global environmental regulations. Texas Instruments provides evaluation modules (e.g., BQ76930EVM) to streamline development, reducing time-to-market for battery management systems.
Ideal for UPS systems, energy storage, and mobility applications, the BQ7693002DBTR combines high accuracy, robust protection, and low power consumption in a single IC. Its programmable firmware and fault diagnostics enhance system safety, while the integrated coulomb counter enables precise state-of-charge (SOC) estimation. This makes it a versatile solution for modern battery-powered devices requiring reliable performance and extended lifecycle management.
Key Features
1. Battery Monitoring
- 16-bit ΔΣ ADC for cell voltage, current, and temperature measurement
- Supports 3S to 5S Li-ion/LiFePO₄ battery packs (0V–5V per cell)
- Coulomb counter with ±0.5% current sensing accuracy
- 5x external NTC inputs + internal die temperature sensor
2. Protection Features
- Hardware-based OV/UV/OC/SC/OT protection with programmable thresholds
- Independent comparator paths for critical faults (10μs response)
- Passive cell balancing (up to 150mA, temperature-regulated)
3. Communication & Control
- I²C interface (up to 400kHz) with configurable address
- 15+ programmable alerts (voltage, current, temperature, faults)
- 72-hour data logging (min/max values for diagnostics)
4. System Integration
- 2.5V–5.5V operating voltage range
- TSSOP-30 package (7.8mm × 4.4mm)
- Daisy-chain capable for multi-IC configurations
5. Power Modes
- 40μA active mode (typical)
- <5μA sleep mode, <2μA shutdown
- Wake-on-fault capability
6. Compliance & Reliability
- AEC-Q100 Grade 3 qualified (–40°C to +85°C)
- RoHS compliant, halogen-free
- 10-year data retention for calibration
7. Target Applications
- E-bikes, power tools, medical batteries
- UPS systems, energy storage, industrial backup
Applications
1. Consumer & Portable Electronics
- Power Tools (Cordless drills, saws, sanders)
- Vacuum Robots & Home Appliances
- Portable Medical Devices (Infusion pumps, portable monitors)
- High-End Drones & RC Devices
2. E-Mobility & Transportation
- E-Bikes & E-Scooters (Battery packs & BMS)
- Electric Skateboards & Hoverboards
- Light Electric Vehicles (LEVs)
- Golf Carts & Mobility Scooters
3. Energy Storage & Backup Systems
- Uninterruptible Power Supplies (UPS)
- Solar Energy Storage Systems
- Home & Industrial Battery Backup Units
- Telecom Backup Power Systems
4. Industrial & High-Power Equipment
- Industrial Robots & AGVs
- Battery-Powered Lawn & Garden Tools
- Electric Forklifts & Warehouse Equipment
- Marine & RV Battery Systems
5. Automotive & Transportation
- Electric Vehicle (EV) Auxiliary Batteries (12V/48V Li-ion systems)
- Hybrid Vehicle Battery Monitoring Systems
- E-Motorcycles & Electric Trikes
- Autonomous Guided Vehicles (AGVs) for Logistics
- Electric Boat & Marine Battery Packs
- Aircraft Ground Power Units (GPU) Batteries
6. Medical & Healthcare
- Portable Oxygen Concentrators
- Handheld Surgical Tools
- Mobile X-Ray & Ultrasound Machines
- Wearable Medical Monitors
- Emergency Defibrillator Batteries
- Hospital Cart Battery Systems
7. Industrial & Infrastructure
- 5G Base Station Backup Power
- Railway Signaling Battery Banks
- Oil/Gas Field Monitoring Equipment
- Mining Explosion-Proof Equipment
- Street Light Energy Storage Systems
- Traffic Control Backup Power
8. Retail & Commercial
- POS System Battery Backup
- Vending Machine Power Management
- Digital Signage Energy Storage
- Smart Shelf RFID Power Systems
- Commercial Kitchen Robot Batteries
9. Consumer Tech & IoT
- High-End Gaming Laptop Batteries
- VR/AR Headset Power Packs
- Smart Home Hub Backup Power
- Premium Wireless Speaker Batteries
- Photography Drone Battery Arrays
- Action Camera Extended Battery Packs
10. Renewable Energy Systems
- Off-Grid Solar Power Walls
- Wind Turbine Pitch Control Batteries
- Microgrid Energy Storage Nodes
- EV Charging Station Buffer Batteries
- Portable Solar Generator Packs
11. Specialized Applications
- Military Field Equipment Batteries
- Satellite Ground Station Power
- Scientific Expedition Gear
- Underwater ROV Power Systems
- Antarctic Research Station Batteries
Why Choose BQ7693002DBTR for These Applications?
✔ Precision Monitoring – 16-bit ADC ensures accurate battery health tracking.
✔ Robust Safety – Full suite of OV/UV/OC/OT protections.
✔ Low Power – Optimized for energy efficiency in portable devices.
✔ Scalable – Works with 3S to 5S battery packs.
✔ Compact & Reliable – Industrial-grade performance in a small footprint.
Ideal for any lithium-based battery system requiring safety, efficiency, and long lifespan!
Advantages
✔ Superior Battery Management Performance
- 16-bit ADC Precision
Delivers industry-leading ±1mV cell voltage accuracy for reliable state-of-charge (SOC) estimation - Multi-Parameter Monitoring
Simultaneously tracks voltage (0-5V/cell), current (±0.5% accuracy), and temperature (±1°C)
✔ Advanced Safety Architecture
- 5-Layer Protection System
Independent hardware comparators for OV/UV/OC/SC/OT with <10μs response time - Failsafe Operation
Watchdog timer and CRC checks ensure reliable operation even during MCU failures - Balancing During Charging
Supports active balancing up to 150mA with thermal regulation
✔ Intelligent System Integration
- Programmable Alert System
Configurable interrupts for 15+ fault conditions via I²C - Black Box Recorder
Stores 72 hours of peak/minimum voltage/temperature data for failure analysis - Plug-and-Play Compatibility
Pre-loaded with optimized profiles for common Li-ion/LiFePO4 chemistries
✔ Design Flexibility Advantages
- Wide Configuration Range
Supports 2.5V-5.5V logic and 0-30V total pack voltage - Modular Expansion
Seamless daisy-chaining for >5S configurations using multiple ICs - NTC Smart Detection
Auto-identifies 10K/100K thermistors and detects sensor faults
✔ Production & Compliance Benefits
- Auto-Calibration
Factory-trimmed references eliminate need for manual calibration - AEC-Q100 Grade 3
Qualified for automotive applications (-40°C to +85°C) - Single-Chip Solution
Reduces BOM by 60% compared to discrete designs
✔ Unique Technical Features
- Predictive Analytics
Built-in algorithms for internal resistance tracking and capacity fade detection - Ultra-Low Power Modes
<2μA shutdown current with wake-on-fault capability - Advanced EMI Handling
Integrated spread-spectrum clocking for <200mV noise in RF environments
✔ Lifetime Value Proposition
- 10-Year Data Retention
Non-volatile memory preserves calibration and settings - Field-Upgradable
Supports firmware updates via I²C for future protocol enhancements - MTBF >1M Hours
Demonstrated reliability in 10,000+ field deployments
This combination of precision, safety, and intelligence makes the BQ7693002DBTR the optimal choice for mission-critical battery systems where performance, reliability, and future-proofing are paramount. The IC’s architectural advantages translate into:
- 30% longer battery life through optimal balancing
- 50% faster development with pre-certified designs
- Zero field failures in properly implemented systems
Specifications
| Category | Specification |
|---|---|
| Manufacturer | Texas Instruments |
| Model Number | BQ7693002DBTR |
| Product Category | Battery Management ICs (PMIC) |
| Product Type | Battery Monitors & Protectors (Li-Ion/Li-Polymer/LiFePO₄) |
| Series | BQ76930 (3- to 5-Series Lithium Battery Monitor and Protector Family) |
| Packaging | Tape & Reel (TR) (Standard SMD Packaging) |
| Package / Case | TSSOP-30 (Thin Shrink Small Outline, 30-Pin) |
| Mounting Type | Surface Mount (SMD) |
| Operating Voltage | 2.5V to 5.5V (Supply Voltage Range) |
| Cell Voltage Range | 0V to 5V (Per Cell) |
| Operating Supply Current | 40 µA (Typical, Active Mode) <5 µA (Sleep Mode) <2 µA (Shutdown) |
| Number of Cells | 3S to 5S (Supports 3, 4, or 5 Series-Connected Li-Ion Cells) |
| Communication Interface | I²C (Up to 400 kHz, Address Configurable) |
| ADC Resolution | 16-bit (Cell Voltage, Temperature, Current) |
| Current Measurement | Coulomb Counter (External Sense Resistor, ±0.5% Typical Accuracy) |
| Protection Features | OV/UV/OC/SC/OT (Programmable Thresholds & Delays) |
| Cell Balancing | Passive Balancing (Integrated FETs, Programmable Current Limits) |
| Temperature Sensing | Internal Die Sensor + 5x External NTC Inputs |
| Low-Power Modes | Sleep Mode (<5µA Typical), Shutdown Mode (<2µA) |
| Operating Temperature | -40°C to +85°C (Industrial Grade) |
| Dimensions (TSSOP-30) | 7.8mm × 4.4mm × 1.0mm (Body Size) |
| Pin Count | 30 Pins |
| Compliance & Certifications | RoHS Compliant, Pb-Free, Halogen-Free |
| Moisture Sensitivity (MSL) | Level 3 (168 Hours Floor Life) |
| Applications | – Power Tools – E-Bikes/Scooters – UPS Systems – Medical Batteries – Energy Storage |
Comparison with Similar Components
| Feature/Chip | TI BQ7693002DBTR | Analog Devices LTC6811-1 | NXP MC33771 | STMicro L9963 |
|---|---|---|---|---|
| Max Series Cells | 5S | 6S | 5S | 4S |
| ADC Resolution | 16-bit ΣΔ | 16-bit SAR | 14-bit ΣΔ | 16-bit ΣΔ |
| Voltage Accuracy | ±0.5mV (calibrated) | ±1.2mV | ±2mV | ±0.8mV |
| Current Sensing | Coulomb counter (±0.5%) | External shunt (±1%) | Integrated shunt (±2%) | External shunt (±1.5%) |
| Protections | OV/UV/OC/SC/OT (HW+SW) | OV/UV/OT (SW only) | OV/UV/OC (HW) | OV/UV/OC/OT (HW) |
| Cell Balancing | Passive (150mA max) | Passive (200mA max) | Passive (100mA max) | Active (50mA max) |
| Interface | I²C (400kHz) | SPI (1MHz) + isoSPI | SPI (2MHz) | I²C (400kHz) |
| Temp Channels | 5x NTC + 1 internal | 5x NTC | 3x NTC | 4x NTC |
| Package | TSSOP-30 (7.8mm²) | SSOP-48 (15mm²) | QFN-32 (5mm²) | TSSOP-38 (12mm²) |
🔧 Key Technical Differentiators
- Measurement Precision
- Highest voltage accuracy (±0.5mV) in its class
- Only solution combining 16-bit ADC with integrated current sensing
- Protection Architecture
- Unique dual-path protection (hardware + software)
- Fastest short-circuit response (10μs)
- Integration Level
- Fewest external components required
- Includes internal die temperature monitoring (absent in competitors)
- Package Efficiency
- Smallest 5S solution (30% smaller footprint than LTC6811)
- Balances pin count vs. functionality optimally
📌 Application-Specific Recommendations
| Application | Best Fit | Rationale |
|---|---|---|
| High-Precision Medical | BQ7693002DBTR | ±0.5mV accuracy critical |
| 6S+ Battery Packs | LTC6811-1 | Higher cell count support |
| Automotive Systems | NXP MC33771 | AEC-Q100 Grade 1 available |
| Active Balancing | ST L9963 | Only option with active balancing |
📈 Performance Benchmark
| Metric | BQ7693002 | LTC6811 | MC33771 | L9963 |
|---|---|---|---|---|
| Voltage Error (%) | 0.01 | 0.03 | 0.05 | 0.02 |
| Balancing Current | 150mA | 200mA | 100mA | 50mA* |
| Interface Speed | 400kHz | 1MHz | 2MHz | 400kHz |
| Temp Sensors | 6 | 5 | 3 | 4 |
BQ7693002DBTR – Summary
Key Strengths:
1️⃣ Precision Monitoring
- Industry-leading ±0.5mV voltage accuracy with 16-bit ADC
- Integrated coulomb counter (±0.5%) and 6 temperature sensors
2️⃣ Robust Safety
- 10μs short-circuit response (fastest in class)
- Dual-path protection (hardware + software)
3️⃣ Optimal Integration
- Smallest 5S solution (TSSOP-30, 7.8mm²)
- Lowest sleep current (<5μA)
4️⃣ Design Flexibility
- I²C interface + daisy-chaining capability
- 5x NTC inputs + internal die sensor
Competitive Position:
✔ Best choice for cost-sensitive, space-constrained 3-5S designs requiring high accuracy
✔ Superior to LTC6811 (smaller), MC33771 (more precise), and L9963 (better protection) in its class
✔ Ideal for medical, power tools, and e-mobility applications
Compromises:
❌ Limited to 5S configurations (vs LTC6811’s 6S)
❌ Passive-only balancing (vs L9963’s active balancing)
Frequently Asked Questions (FAQs)
1. What battery chemistries does the BQ7693002 support?
It supports Li-ion, Li-Polymer, and LiFePO₄ batteries (3S to 5S configurations).
2. How fast is the short-circuit protection response time?
10μs hardware-based response (fastest in its class), with configurable thresholds.
3. Can it monitor individual cell temperatures?
Yes, it supports 5 external NTC thermistors (one per cell) + internal die temperature sensing.
4. Does it support active cell balancing?
No, it features passive balancing only (up to 150mA per cell). For active balancing, consider ST’s L9963.
5. What communication interfaces are available?
I²C (up to 400kHz) with configurable addressing. Competing ICs like the LTC6811 offer SPI.
6. Is it suitable for automotive applications?
While it meets AEC-Q100 Grade 3 (-40°C to +85°C), NXP’s MC33771 (Grade 1) may be better for harsh automotive environments.
7. How accurate is the voltage measurement?
±0.5mV after calibration (best-in-class for 5S monitors). Competing ICs typically achieve ±1.2mV or worse.
8. Can I daisy-chain multiple BQ7693002 ICs for >5S packs?
Yes, but TI recommends their BQ76940 for higher cell counts (up to 15S).
9. What’s the quiescent current in sleep mode?
<5μA (ultra-low power), with <2μA in shutdown mode.
10. Does it include cycle counting or battery aging diagnostics?
Yes, it logs 32-bit cycle counts and tracks internal resistance for health monitoring.
11. What’s the main advantage over Analog Devices’ LTC6811?
The BQ7693002 offers:
- Smaller size (TSSOP-30 vs. SSOP-48)
- Integrated current sensing (vs. external shunt)
- Lower cost for 3S-5S designs
12. Is firmware programming required for basic operation?
No, it works with pre-loaded defaults, but I²C allows customization of protection thresholds and balancing parameters.
13. What’s the maximum balancing current per cell?
150mA passive balancing (temperature-regulated).
14. Can it detect a disconnected cell?
Yes, it flags open-wire conditions via I²C alerts.
15. Where can I find evaluation tools?
TI offers the BQ76930EVM evaluation module for rapid prototyping.
16. What is the maximum total battery pack voltage supported?
The IC supports up to 30V total pack voltage (5S Li-ion at full charge).
17. How does the cell balancing algorithm work?
It uses voltage-based threshold balancing with programmable:
- Start/stop voltages
- Balancing current limits
- Temperature derating
18. Can it operate during battery charging?
Yes, it supports real-time monitoring during charge/discharge, including balancing while charging.
19. What’s the difference between BQ7693002 and BQ7693003?
The BQ7693003 adds:
- Support for 2S battery configurations
- Slightly different register mapping
- Otherwise identical features
20. How many programmable protection thresholds are available?
It offers 15+ configurable thresholds including:
- 2-level OV/UV protection
- 3-stage overcurrent protection
- 2 temperature thresholds (hot/cold)
21. What happens during a communication failure?
The IC has:
- Independent hardware protection that remains active
- Watchdog timer for MCU communication monitoring
- Default safe states for critical faults
22. Is there a development SDK or software library available?
Yes, TI provides:
- BQStudio GUI for configuration
- Embedded software examples for common MCUs
- MathLab/Simulink models for simulation
23. What PCB layout considerations are important?
Critical requirements:
- Kelvin connections for current sensing
- Guard rings around NTC inputs
- <10mm trace length for cell voltage inputs
- Proper ground partitioning
24. Can it measure battery impedance?
Yes, through:
- Internal resistance calculation (ΔV/ΔI)
- Special test mode for impedance profiling
- Supports SOC correlation algorithms
25. What quality certifications does it have?
The IC is:
- RoHS 3.0 compliant
- Halogen-free
- AEC-Q100 Grade 3 qualified
- Manufactured in ISO 9001 facilities
26. How does it handle cell voltage reversal?
It features:
- -3V to +5V cell input range
- Polarity protection diodes
- Fault detection for reversed cells
27. What’s the typical time between calibration?
Factory calibration lasts 10+ years, but:
- Current sense may need yearly calibration
- Temperature sensors benefit from 2-point calibration
28. Can it interface with gas gauges like BQ34Z100?
Yes, through:
- Direct I²C connection
- Shared sense resistor configuration
- Synchronized sampling modes
29. What’s the ESD protection rating?
±4kV HBM on all pins (meets JEDEC 22-A114)
30. Where can I find failure analysis reports?
Available through:
- TI’s quality portal (requires login)
- Reliability reports in the product folder
- MTBF data in the datasheet
Datasheet
BQ7693002DBTR Texas Instruments datasheet
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