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Texas Instruments BQ20Z80DBTR-V102
- Part No.:
- BQ20Z80DBTR-V102
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 38-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
BQ20Z80DBTR-V102.pdf
- Description:
- IC ADVANCED GAS GAUGE 38-TSSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
BQ20Z80DBTR-V102 from Texas Instruments is a SBS 1.1-compliant smart battery gas gauge IC with Impedance Track™ technology, designed for Li-ion/Li-polymer battery packs operating at 7.2 V, 10.8 V, or 14.4 V. It integrates a 16-bit delta-sigma coulomb counter (0.65 nVh resolution), supports SMBus v1.1 communication, and delivers better than 1% gas-gauging accuracy over battery lifetime without learning cycles. It functions as the core fuel-gauge and safety manager in conjunction with the bq29312A AFE.
For engineers reviewing the BQ20Z80DBTR-V102 datasheet, BQ20Z80DBTR-V102 pinout, BQ20Z80DBTR-V102 application, or BQ20Z80DBTR-V102 equivalent, key selection considerations include its 38-pin TSSOP (DBT) package, integrated RISC CPU with 768-byte user flash, dual-level safety protection architecture, SHA-1 authentication support, and compatibility with TI's bq29312A analog front-end for complete pack electronics solutions.
Technical Context
The BQ20Z80DBTR-V102 implements a proprietary Impedance Track™ algorithm that continuously models battery impedance to compute remaining capacity while accounting for discharge rate, temperature, and aging-enabling <1% error across the full lifecycle. Its dual delta-sigma ADC architecture separately measures voltage (cell/pack), current (via SR1/SR2 sense resistor), and temperature (TS1/TS2 thermistor inputs) with auto-calibration capability.
It operates in three power modes-Normal (1-second update interval), Sleep (configurable interval), and Shutdown-with typical operating current of 350 µA (BQ20Z80 only) and 375 µA when paired with bq29312A. The device uses an internal 32.768-kHz oscillator (with optional external crystal) and includes integrated time base, eliminating need for external crystal in most configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gas-Gauging Accuracy | Better than 1% error over battery lifetime; no full-charge/discharge learning cycle required. |
| Coulomb Counter Resolution | 0.65 nVh-enables high-precision charge/discharge integration with sub-microamp-hour detection. |
| Operating Temperature | –40°C to +85°C-supports industrial and portable computing environments with extended thermal margin. |
| SMBus Compliance | SBS v1.1 compliant with PEC support-ensures interoperability with host systems implementing Smart Battery Specification. |
| Power Supply Range | VDDA/VDDD = 3.0 V to 3.6 V-compatible with standard 3.3-V logic rails and low-voltage battery monitoring. |
| Package | 38-pin TSSOP (DBT)-surface-mount footprint optimized for compact battery-pack PCB layouts. |
| Authentication | SHA-1 cryptographic authentication-prevents unauthorized firmware updates and enables secure host-battery handshake. |
Pinout & Package
38-pin Thin Shrink Small Outline Package (TSSOP, DBT) with exposed pad; lead pitch 0.5 mm, body dimensions 12.5 mm × 6.1 mm × 1.2 mm. Designed for reflow soldering and compatible with automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Voltage measurement input | Connects to bq29312A CELL pin to read individual cell voltages via AFE multiplexing. |
| TS1 / TS2 | Thermistor voltage inputs | Interface two NTC thermistors (e.g., Semitec 103AT) for dual-point battery temperature monitoring. |
| SR1 / SR2 | Current-sense differential inputs | Measure voltage drop across 5 mΩ–20 mΩ sense resistor to compute charge/discharge current with ±0.25 V range. |
| SAFE (pins 7 & 12) | Dual-level safety outputs | Active-high and active-low complementary signals to trigger fuse blow or secondary protection events. |
| SMBC / SMBD | SMBus clock/data I/O | Open-drain bidirectional interface compliant with SMBus v1.1 timing (10–100 kHz). |
| LED1–LED5 | LED segment drivers | Directly drive 3-, 4-, or 5-segment LED displays for real-time remaining capacity indication. |
Key Features
| Feature | Design Value |
|---|---|
| Impedance Track™ Technology | Enables dynamic modeling of battery impedance to maintain <1% state-of-charge accuracy across aging, temperature, and load variations-no recalibration needed. |
| Lifetime Data Logging | Records 13 critical lifetime metrics (e.g., min/max cell voltage, peak discharge current, average temperature) in nonvolatile memory for warranty analysis and failure diagnostics. |
| Integrated Dual-Level Safety | Configurable first-tier (OV/UV/OC/OT) and second-tier (SOV/SOC/SOT/fuse blow) protection with independent SAFE outputs for fail-safe battery disable. |
| Cell Balancing Algorithm | Automatically reduces inter-cell voltage imbalance during charging to prevent overcharge, extend usable energy, and delay charge termination. |
| Programmable Pulse Charging | Supports ON/OFF voltage thresholds and pulse timing control to reduce charging time while maintaining thermal and voltage safety limits. |
Applications
| Notebook PCs | Medical Portable Devices |
|---|---|
Use Scenario: Integrated into removable smart battery packs for Windows/Linux laptops requiring precise runtime estimation and SBS compliance. IC Role / Device Role / Timing Role: Primary fuel gauge and safety controller communicating via SMBus to EC/BIOS; manages cell balancing and reports RemainingCapacity, StateOfCharge, and SafetyStatus. Use Value: Delivers >99% runtime prediction accuracy over 500+ cycles, eliminates unexpected shutdowns, and enables OEM battery authentication via SHA-1. | Use Scenario: Embedded in sealed battery modules for portable ultrasound, infusion pumps, and handheld diagnostic tools with strict safety certification requirements. IC Role / Device Role / Timing Role: Real-time battery health monitor and dual-level protector; logs lifetime temperature/voltage extremes for FDA audit trails and triggers SAFE outputs on critical faults. Use Value: Meets IEC 62366 usability and IEC 60601-1 safety standards through configurable 2nd-level overvoltage/overcurrent protection and tamper-proof data logging. |
| Test & Measurement Equipment | Industrial Handheld Terminals |
Use Scenario: Power management subsystem in battery-operated oscilloscopes, multimeters, and spectrum analyzers requiring stable runtime under variable loads. IC Role / Device Role / Timing Role: High-accuracy coulomb counter and thermal guard; measures instantaneous current with 0.65 nVh resolution and triggers pre-charge/discharge cutoff at defined temperature thresholds. Use Value: Maintains ±1% capacity reporting accuracy across –20°C to +60°C ambient, enabling reliable low-power sleep mode scheduling and predictive maintenance alerts. | Use Scenario: Smart battery solution for ruggedized warehouse scanners, RFID readers, and field service tablets deployed in logistics and manufacturing. IC Role / Device Role / Timing Role: Pack-level intelligence hub coordinating with bq29312A AFE; executes configurable charge algorithms (pre-charge, fast, pulse) and drives 5-segment LED for SOC display. Use Value: Reduces BOM count by integrating flash memory, oscillator, and LED drivers-eliminating external crystal, EEPROM, and display controller ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar smart battery gas-gauge applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ20Z75DBTR-V102 | Same Impedance Track™ engine and 38-pin TSSOP package but lacks SHA-1 authentication and has reduced dataflash (256 B vs. 768 B user flash). | Supports basic SBS v1.1 functionality without cryptographic security; suitable for cost-sensitive consumer devices where authentication is not required. | Select BQ20Z75DBTR-V102 if SHA-1 and extended lifetime logging are unnecessary and BOM cost reduction is prioritized. |
| BQ20Z95DBTR-V102 | Successor with enhanced accuracy (<0.5%), wider temperature range (–40°C to +105°C), and added QMAX compensation; same pinout and SMBus interface. | Targets high-reliability applications such as aviation-grade portable equipment and automotive infotainment backup batteries. | Choose BQ20Z95DBTR-V102 for next-generation designs needing improved accuracy, extended thermal operation, and future-proof firmware extensibility. |
Compared with BQ20Z75DBTR-V102, the BQ20Z80DBTR-V102 adds SHA-1 authentication and expanded data logging-critical for medical and enterprise devices. Versus BQ20Z95DBTR-V102, it trades higher accuracy and extended temperature rating for lower cost and proven field reliability in established notebook platforms.
Availability
BQ20Z80DBTR-V102 is available at Aetrix Electronics and suitable for notebook PC battery packs, portable medical instrumentation, and industrial handheld terminals requiring stable component supply, long-term lifecycle support, and SBS 1.1 compliance.
Supply support for BQ20Z80DBTR-V102 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 battery management system expertise.
The BQ20Z80DBTR-V102 belongs to TI's Smart Battery Fuel Gauge product line, engineered specifically for high-accuracy, safety-critical Li-ion/Li-polymer battery packs in portable computing and professional equipment.
FAQ
What is the primary function of the BQ20Z80DBTR-V102 in a smart battery system?
The BQ20Z80DBTR-V102 serves as the central fuel-gauge and safety manager in smart battery packs. It precisely calculates remaining capacity using Impedance Track™ technology, communicates via SMBus v1.1 with host systems, enforces dual-level overvoltage/overcurrent/overtemperature protection, and coordinates with the bq29312A AFE. Its role is essential for runtime accuracy, safety compliance, and battery health monitoring in the BQ20Z80DBTR-V102-based design.
Does the BQ20Z80DBTR-V102 require an external crystal oscillator?
No-the BQ20Z80DBTR-V102 includes an internal 32.768-kHz oscillator and can operate without an external crystal. It automatically attempts internal oscillator startup; if a 100-kΩ resistor is connected between ROSC (pin 33) and VSSA (pin 34), it uses that configuration. An external 12-pF crystal may be used instead-but both must not be installed simultaneously. This flexibility simplifies layout and reduces BOM count for the BQ20Z80DBTR-V102 implementation.
How does the BQ20Z80DBTR-V102 achieve better than 1% gas-gauging accuracy over battery lifetime?
The BQ20Z80DBTR-V102 achieves this through patented Impedance Track™ technology, which continuously models battery impedance changes due to aging, temperature, and load dynamics-unlike basic coulomb counting. It combines high-resolution delta-sigma ADC measurements (0.65 nVh), auto-calibration of SR1/SR2 offset, and real-time cell voltage/temperature correlation. These features collectively maintain <1% error across hundreds of cycles, making the BQ20Z80DBTR-V102 uniquely suited for mission-critical runtime estimation.
Can the BQ20Z80DBTR-V102 drive LED indicators directly?
Yes-the BQ20Z80DBTR-V102 integrates five dedicated LED driver outputs (LED1–LED5) capable of directly driving external LEDs for remaining capacity indication. It supports 3-, 4-, or 5-segment displays with firmware-configurable mapping, eliminating the need for external LED driver ICs. Each output handles up to 10 mA sink current, and the display behavior is fully programmable via SMBus commands-making the BQ20Z80DBTR-V102 ideal for user-facing battery status feedback.
What safety protection features does the BQ20Z80DBTR-V102 provide, and how are they implemented?
The BQ20Z80DBTR-V102 implements two tiers of safety protection: first-level (OV/UV/OC/OT) and second-level (SOV/SOC/SOT/fuse blow). First-level actions are managed internally and reported via SMBus; second-level faults assert complementary SAFE (pin 7, active-high) and SAFE (pin 12, active-low) outputs to trigger external fuses or disable FETs. All thresholds-including cell imbalance, open thermistor, and AFE communication errors-are configurable in dataflash, ensuring the BQ20Z80DBTR-V102 meets stringent IEC 62133 and UL 2054 requirements.
BQ20Z80DBTR-V102 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Impedance Track™
- Package/Case:
- 38-TFSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Battery Monitor
- Battery Chemistry:
- Lithium Ion/Polymer
- Number of Cells:
- -
- Fault Protection:
- Over Current, Over Temperature, Over/Under Voltage, Short Circuit
- Interface:
- SMBus
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 38-TSSOP
BQ20Z80DBTR-V102 FAQ
1.How can I place an order for BQ20Z80DBTR-V102 through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ20Z80DBTR-V102 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 BQ20Z80DBTR-V102 reliable?
The price and inventory of BQ20Z80DBTR-V102 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ20Z80DBTR-V102 is usually 5 days.
3.What payment methods are accepted for BQ20Z80DBTR-V102?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ20Z80DBTR-V102 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ20Z80DBTR-V102?
BQ20Z80DBTR-V102 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ20Z80DBTR-V102 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 BQ20Z80DBTR-V102?
For technical support, including BQ20Z80DBTR-V102 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ20Z80DBTR-V102 requirements.
6.How does Aetrix verify that BQ20Z80DBTR-V102 is sourced from the original manufacturer or authorized distributors?
All BQ20Z80DBTR-V102 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 BQ20Z80DBTR-V102 meets industry standards.
7.What is the process for return or replacement of BQ20Z80DBTR-V102?
All BQ20Z80DBTR-V102 units undergo pre-shipment inspection (PSI). If there is an issue with BQ20Z80DBTR-V102, 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 BQ20Z80DBTR-V102 part is unused and in its original packaging.
Return procedure for BQ20Z80DBTR-V102:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BQ20Z80DBTR-V102 Tags
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