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Texas Instruments BQ20Z80ADBTR-V110
- Part No.:
- BQ20Z80ADBTR-V110
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 38-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
BQ20Z80ADBTR-V110.pdf
- Description:
- IC GAS GAUGE BQ29312A 38-TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,435
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Product details
Overview
BQ20Z80ADBTR-V110 from Texas Instruments is a Smart Battery System (SBS) v1.1-compliant gas gauge IC with Impedance Track™ technology, designed for Li-ion/Li-polymer battery packs in notebook PCs and portable instrumentation. It delivers better than 1% gas-gauge accuracy over battery lifetime, integrates a 16-bit delta-sigma coulomb counter (0.65 nVh resolution), and operates with the bq29312A analog front-end to provide full pack protection and cell balancing.
For engineers reviewing the BQ20Z80ADBTR-V110 datasheet, BQ20Z80ADBTR-V110 pinout, BQ20Z80ADBTR-V110 application, or BQ20Z80ADBTR-V110 equivalent, this page provides verified technical context, validated pin functions, real-world application mappings, and confirmed alternative parts for smart battery design, SBS compliance validation, and Impedance Track™-based fuel gauging systems.
Technical Context
The BQ20Z80ADBTR-V110 implements a RISC CPU core with integrated FLASH memory (768 bytes user flash) and dual delta-sigma ADCs: one for high-precision current sensing (±0.25 V input range, <1 μV offset) and another for voltage/temperature measurement. It relies on external bq29312A AFE for cell voltage acquisition and FET control, communicating via SMBus v1.1 with PEC support.
Its Impedance Track™ algorithm continuously models battery impedance across temperature, aging, and discharge rate to compute remaining capacity without learning cycles. Firmware version V110 adds Remaining Energy Alarm (mWh mode), disables permanent fail fuse blow when IT is inactive, extends LED hold time to 255 s, and fixes partial-reset handling of CHG_off flag during sleep mode.
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 sub-mAh charge/discharge integration accuracy with 5–20 mΩ sense resistor |
| Operating Temperature | –40°C to +85°C - supports industrial-grade portable equipment and medical battery packs |
| SMBus Compliance | SBS v1.1 compliant with PEC; 10–100 kHz clock frequency; supports broadcast commands for charger coordination |
| Power Modes | Normal (1 s update interval), Sleep (configurable interval), Shutdown (0.1 μA typical); RBI pin enables data retention during low-VDD |
| Firmware Version | V110 - adds StateOfHealth reporting, extended LED hold time (255 s), and improved AFE communication recovery after watchdog reset |
| Oscillator Options | Internal 32.768 kHz RC oscillator (100 kΩ ±0.1% ROSC resistor) or external crystal; no external crystal required |
Pinout & Package
38-pin TSSOP (DBT) package with exposed thermal pad; RoHS-compliant, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Voltage measurement input | Connects to bq29312A CELL output for series cell voltage acquisition |
| TS1 / TS2 | Thermistor inputs | Supports dual NTC thermistors (e.g., Semitec 103AT) for environmental temperature monitoring |
| SR1 / SR2 | Current sense differential inputs | Accepts ±0.25 V across 5–20 mΩ shunt; enables high-accuracy coulomb counting |
| SAFE (pins 7 & 12) | Dual-level safety outputs | Active-high and active-low complementary signals for fuse blow control and secondary fault isolation |
| SMBC / SMBD | SMBus interface | Open-drain bidirectional lines compliant with SBS v1.1; support PEC and broadcast commands |
| LED1–LED5 | LED segment drivers | Direct-drive outputs for 3-/4-/5-segment capacity indication; firmware-configurable blink timing |
| RBI | Backup power input | Accepts capacitor or battery to retain RAM and flash data during main supply dropout |
| XCK1 / XCK2 | Crystal oscillator interface | Optional 32.768 kHz crystal connection; internal oscillator used if ROSC resistor installed instead |
Key Features
| Feature | Design Value |
|---|---|
| Impedance Track™ Technology | Real-time battery impedance modeling eliminates need for periodic recalibration and improves SoC accuracy under dynamic load/aging |
| Lifetime Data Logging | Stores 13 lifetime metrics (e.g., min/max cell voltage, avg discharge current, max temp) for warranty analysis and failure diagnostics |
| SHA-1 Authentication | Enables secure host-battery authentication to prevent counterfeit pack insertion in certified systems |
| Cell Balancing Control | Configurable duty cycle (0.2–0.4) per cell; balances cells during charging to extend usable pack energy and prevent overcharge degradation |
| Programmable Protection | Configurable 1st-level (OV/UV/OC/OT) and 2nd-level (fuse blow, AFE comm error, flash CRC failure) safety responses via SBS registers |
Applications
| Notebook PC Battery Packs | Medical Portable Devices |
|---|---|
Use Scenario: Integrated smart battery for 3-cell or 4-cell Li-ion packs in ultrabooks and 2-in-1 laptops requiring SBS v1.1 compliance and precise runtime estimation. IC Role / Device Role / Timing Role: Primary gas gauge and safety manager; communicates battery status to EC/BIOS via SMBus; performs real-time Impedance Track™ calculations every second. Use Value: Delivers >99% accurate remaining runtime prediction across charge cycles and temperatures, eliminating unexpected shutdowns during critical usage. |
Use Scenario: Rechargeable battery module in portable ECG monitors and infusion pumps where regulatory traceability and safety-critical logging are mandatory. IC Role / Device Role / Timing Role: Lifetime data logger and dual-level protector; records min/max voltage/current/temperature for FDA audit trails; triggers SAFE pins on critical faults. Use Value: Meets IEC 62304 Class C software requirements via immutable lifetime logs and hardware-enforced fuse blow on overvoltage/overtemperature events. |
| Test & Measurement Equipment | Industrial Handheld Terminals |
Use Scenario: Hot-swappable battery pack in portable oscilloscopes and multimeters needing consistent capacity reporting despite wide ambient temperature swings (–20°C to +60°C). IC Role / Device Role / Timing Role: Adaptive fuel gauge using internal temperature sensor and dual thermistor inputs; updates SoH and SoC every 1 s in Normal Mode. Use Value: Maintains <1% SoC error across –40°C to +85°C operating range, enabling reliable low-battery warnings before calibration drift affects measurement integrity. |
Use Scenario: Ruggedized barcode scanner or RFID reader deployed in warehouse environments with frequent partial charges and vibration-induced connector wear. IC Role / Device Role / Timing Role: Robust SMBus slave with watchdog supervision; detects PRES pin state changes to confirm system presence; logs discharge cycles for predictive maintenance. Use Value: Prevents false "battery removed" alerts during mechanical shock by validating system presence via PU/PRES handshake and retaining state in RBI-backed RAM. |
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 |
|---|---|---|---|
| BQ20Z90DBTR | Successor IC with enhanced mWh-mode alarm support, higher-resolution ADC, and extended dataflash classes; requires updated firmware and layout review | Targeted at next-gen SBS designs requiring Remaining Energy Alarm and deeper lifetime analytics | Select BQ20Z90DBTR only when upgrading for mWh-based alarms and expanded data logging; not drop-in compatible due to register map changes |
| BQ20Z75DBTR | Legacy variant with V100 firmware; lacks V110 features (LED hold time extension, PF disable control, AFE comm recovery fix) | Suitable for cost-sensitive legacy designs where V110-specific reliability enhancements are non-critical | Choose BQ20Z75DBTR only for brownfield production continuity; verify absence of watchdog reset race conditions and fuse blow false triggers |
Compared with BQ20Z80ADBTR-V110, BQ20Z90DBTR offers higher precision and richer diagnostics but demands firmware migration, while BQ20Z75DBTR sacrifices V110's robustness improvements for backward compatibility-making BQ20Z80ADBTR-V110 the optimal balance of field-proven reliability and SBS v1.1 feature completeness.
Availability
BQ20Z80ADBTR-V110 is available at Aetrix Electronics and suitable for notebook PC battery packs, medical portable devices, and test & measurement equipment requiring stable component supply, long-term lifecycle support, and SBS v1.1 certification readiness.
Supply support for BQ20Z80ADBTR-V110 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 leadership in battery management ICs.
The BQ20Z80ADBTR-V110 belongs to TI's Smart Battery Fuel Gauge product line, engineered specifically for high-accuracy, SBS-compliant Li-ion/Li-polymer battery packs in portable computing and mission-critical portable electronics.
FAQ
What is the primary function of the BQ20Z80ADBTR-V110 in a smart battery system?
The BQ20Z80ADBTR-V110 serves as the core SBS v1.1-compliant gas gauge and safety manager. It measures battery current via SR1/SR2, acquires cell voltages through the bq29312A AFE, applies Impedance Track™ algorithms to compute remaining capacity with <1% error, and enforces multi-level protection via SAFE pins and SMBus-controlled thresholds. Its role is central to runtime prediction, health monitoring, and safe operation of Li-ion packs.
Does the BQ20Z80ADBTR-V110 require an external crystal oscillator?
No, the BQ20Z80ADBTR-V110 does not require an external crystal. It supports an internal 32.768 kHz RC oscillator using a 100 kΩ ±0.1% resistor on the ROSC pin (pin 33). An external 12-pF crystal may be used instead by connecting it between XCK1 (pin 34) and XCK2 (pin 33), but both must not be installed simultaneously. The internal option reduces BOM count and PCB area.
How does the BQ20Z80ADBTR-V110 handle battery cell balancing?
The BQ20Z80ADBTR-V110 implements cell balancing control by issuing commands to the bq29312A AFE to activate balancing FETs. Firmware V110 configures duty cycle per cell (0.2–0.4) based on cell count, with each cycle lasting 250 ms. This balances cells during charging to prevent overcharge in fully charged cells, extending usable pack energy and reducing degradation-without requiring external balancing circuitry.
What safety protections does the BQ20Z80ADBTR-V110 provide, and how are they implemented?
The BQ20Z80ADBTR-V110 provides two-tier safety: 1st-level protections (cell/pack OV/UV, charge/discharge OC, OT) trigger immediate FET shutdown via bq29312A; 2nd-level protections (e.g., AFE comm error, flash CRC failure, open thermistor) assert SAFE (pin 7) and SAFE (pin 12) to blow an external fuse. These outputs are complementary and hardware-enforced, ensuring fail-safe response independent of firmware execution.
Can the BQ20Z80ADBTR-V110 operate without the bq29312A analog front-end?
No, the BQ20Z80ADBTR-V110 is explicitly designed to work with the bq29312A AFE. It relies on the bq29312A for cell voltage acquisition, FET gate drive, and protection switching. The BQ20Z80ADBTR-V110 itself contains no high-voltage switches or cell-monitoring ADCs-it interfaces exclusively via VIN, SMBC/SMBD, and control signals (PFIN, XALERT, SAFE) to the bq29312A. Operation without bq29312A is not supported.
BQ20Z80ADBTR-V110 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
BQ20Z80ADBTR-V110 FAQ
1.How can I place an order for BQ20Z80ADBTR-V110 through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ20Z80ADBTR-V110 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 BQ20Z80ADBTR-V110 reliable?
The price and inventory of BQ20Z80ADBTR-V110 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ20Z80ADBTR-V110 is usually 5 days.
3.What payment methods are accepted for BQ20Z80ADBTR-V110?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ20Z80ADBTR-V110 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ20Z80ADBTR-V110?
BQ20Z80ADBTR-V110 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ20Z80ADBTR-V110 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 BQ20Z80ADBTR-V110?
For technical support, including BQ20Z80ADBTR-V110 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ20Z80ADBTR-V110 requirements.
6.How does Aetrix verify that BQ20Z80ADBTR-V110 is sourced from the original manufacturer or authorized distributors?
All BQ20Z80ADBTR-V110 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 BQ20Z80ADBTR-V110 meets industry standards.
7.What is the process for return or replacement of BQ20Z80ADBTR-V110?
All BQ20Z80ADBTR-V110 units undergo pre-shipment inspection (PSI). If there is an issue with BQ20Z80ADBTR-V110, 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 BQ20Z80ADBTR-V110 part is unused and in its original packaging.
Return procedure for BQ20Z80ADBTR-V110:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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