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Texas Instruments BQ20Z80ADBT-V110G4
- Part No.:
- BQ20Z80ADBT-V110G4
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 38-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
BQ20Z80ADBT-V110G4.pdf
- Description:
- IC GAS GAUGE LI-ION 38TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,386
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Product details
Overview
BQ20Z80ADBT-V110G4 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 in notebook PCs and portable instrumentation. It integrates a 16-bit delta-sigma coulomb counter (0.65 nVh resolution), supports SMBus v1.1 communication, delivers <1% gas-gauge error over battery lifetime, and operates with the bq29312A analog front-end for full pack protection.
For engineers reviewing the BQ20Z80ADBT-V110G4 datasheet, BQ20Z80ADBT-V110G4 pinout, BQ20Z80ADBT-V110G4 application, or BQ20Z80ADBT-V110G4 equivalent, key selection considerations include its 38-pin TSSOP (DBT) package, integrated RISC CPU with field-programmable flash, dual thermistor inputs (TS1/TS2), dual sense-resistor inputs (SR1/SR2), and support for SHA-1 authentication and lifetime data logging.
Technical Context
The BQ20Z80ADBT-V110G4 implements a proprietary Impedance Track™ algorithm that continuously models battery impedance to compute remaining capacity-accounting for discharge rate, temperature, and aging without requiring learning cycles. Its dual 16-bit delta-sigma ADCs independently measure voltage (cell/pack), current (±0.25 V range), and temperature with auto-calibration of SR1/SR2 offset (<1 μV).
It operates in three power modes: Normal (1-second measurement intervals), Sleep (adjustable interval), and Shutdown (0.1 μA quiescent). The device uses an internal 32.768-kHz oscillator (100-kΩ ROSC resistor) or external crystal, and interfaces via SMBus with PEC error checking, supporting both master and slave modes per SBS v1.1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gas Gauge Accuracy | Better than 1% error over battery lifetime; no full-charge/discharge learning cycle required. |
| Coulomb Counter Resolution | 0.65 nVh-enables precise charge/discharge flow integration across 5–20 mΩ sense resistors. |
| Operating Temperature | –40°C to +85°C-validated for industrial and portable computing environments. |
| SMBus Compliance | SBS v1.1 compliant with PEC; supports 10–100 kHz clock frequency and broadcast commands. |
| Power Consumption | 350 μA in operating mode; 8 μA in sleep mode; 0.1 μA in shutdown-optimized for battery longevity. |
| Memory | 768 bytes user flash (20,000 write cycles, 10-year data retention) and RAM registers for SBS data objects. |
| Protection Integration | Works exclusively with bq29312A AFE to enable 1st/2nd level OV/UV/OC/OT protection and cell balancing control. |
Pinout & Package
38-pin Thin Shrink Small Outline Package (TSSOP-DBT), 0.65 mm pitch, RoHS-compliant, moisture sensitivity level 3.
| 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 | Support dual NTC thermistors (e.g., Semitec 103AT) for environmental temperature monitoring. |
| SR1 / SR2 | Current-sense differential inputs | Measure ±0.25 V drop across 5–20 mΩ sense resistor for high-accuracy coulomb counting. |
| SAFE (pins 7 & 12) | Complementary safety outputs | Active-high and active-low signals to trigger fuse blow or secondary protection events. |
| SMBC / SMBD | SMBus clock/data | Open-drain bidirectional interface compliant with SBS v1.1 timing (10–100 kHz, PEC enabled). |
| LED1–LED5 | LED segment drivers | Drive 3-, 4-, or 5-segment LED display for remaining capacity indication (firmware-configurable). |
Key Features
| Feature | Design Value |
|---|---|
| Impedance Track™ Algorithm | Real-time battery impedance modeling enables accurate SoC estimation across aging, temperature, and load variations-no calibration learning required. |
| Lifetime Data Logging | Records 13 critical parameters (e.g., lifetime min/max cell voltage, max discharge current, average temperature) for warranty analysis and failure diagnostics. |
| SHA-1 Authentication | Enables secure host-to-battery verification using cryptographic challenge-response to prevent counterfeit pack insertion. |
| Integrated Oscillator | On-chip 32.768-kHz oscillator eliminates external crystal; optional 12-pF crystal support with automatic fallback detection. |
| Cell Balancing Control | Configurable duty-cycle algorithm (e.g., 0.4 for ≤4 cells) drives external FETs to equalize cell voltages during charging and extend pack life. |
Applications
| Notebook PC Battery Packs | Medical Portable Devices |
|---|---|
Use Scenario: Integrated into 3S/4S Li-ion battery packs for ultrabooks and 2-in-1 laptops requiring precise runtime prediction and OEM-level safety compliance. IC Role / Device Role / Timing Role: Primary SBS-compliant gas gauge and safety coordinator-interfaces with bq29312A AFE to manage cell balancing, overvoltage cutoff, and SHA-1 authentication. Use Value: Delivers <1% SoC error over 500+ cycles while enabling firmware-updatable protection thresholds and lifetime data logging for field failure analysis. |
Use Scenario: Used in battery-powered ultrasound handhelds and patient monitors where regulatory traceability and runtime reliability are critical. IC Role / Device Role / Timing Role: Smart battery manager performing real-time impedance-based fuel gauging, dual-thermistor thermal monitoring, and SMBus broadcast alerts for low-voltage shutdown. Use Value: Supports FDA-required data logging (lifetime min/max temperature/voltage) and prevents unsafe operation via dual-level safety outputs (SAFE pins 7/12). |
| Test & Measurement Equipment | Industrial Portable Instrumentation |
Use Scenario: Embedded in rechargeable battery modules for portable oscilloscopes and multimeters needing stable runtime under variable load profiles. IC Role / Device Role / Timing Role: Gas gauge and communications hub-reports AtRateTimeToEmpty, RelativeStateOfCharge, and SafetyStatus via SMBus to host MCU for UI updates and alarm triggering. Use Value: Enables instant-accuracy fuel gauging (no learning) and pulse-charging support to reduce recharge time without compromising cell health. |
Use Scenario: Deployed in explosion-proof gas detectors and handheld calibrators operating in wide-temperature industrial environments (–40°C to +85°C). IC Role / Device Role / Timing Role: Robust battery management unit-uses internal temperature sensor backup, auto-calibrating coulomb counter, and shutdown mode (0.1 μA) for long-term storage. Use Value: Maintains <1% gas-gauge accuracy across temperature extremes and provides fail-safe protection via 2-tier OV/UV/OC detection coordinated with bq29312A. |
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 | Supports extended SBS commands including Remaining Energy Alarm (0x40); adds DF.Remaining Energy Alarm capability not present in BQ20Z80ADBT-V110G4. | Required for energy-based (mWh) alarm triggering in multi-cell packs with varying nominal voltages. | Select BQ20Z90DBTR if mWh-mode alarms and enhanced energy reporting are mandatory; otherwise BQ20Z80ADBT-V110G4 suffices for standard mAh-based SoC. |
| BQ20Z75DBTR | Lacks SHA-1 authentication, lifetime data logging, and pulse charging; uses older firmware with no V110 feature set (e.g., LED hold time up to 255 s). | Suitable only for cost-sensitive, non-security-critical applications without field-service data requirements. | Choose BQ20Z75DBTR only when authentication, data logging, and advanced charging features are unnecessary-BQ20Z80ADBT-V110G4 provides full SBS v1.1 feature parity. |
Compared with BQ20Z90DBTR and BQ20Z75DBTR, the BQ20Z80ADBT-V110G4 delivers optimal balance of security (SHA-1), serviceability (lifetime logging), and precision (<1% SoC error), making it the preferred choice for OEM notebook and medical battery designs requiring validated firmware revision V110 functionality.
Availability
BQ20Z80ADBT-V110G4 is available at Aetrix Electronics and suitable for notebook PC battery packs, medical portable devices, and industrial portable instrumentation requiring stable component supply, long-lifecycle support, and TI-qualified smart battery firmware.
Supply support for BQ20Z80ADBT-V110G4 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 expertise in battery management systems.
The BQ20Z80ADBT-V110G4 belongs to TI's Smart Battery Manager product line, engineered specifically for SBS-compliant Li-ion/Li-polymer battery packs requiring high-accuracy fuel gauging, multi-level safety, and secure authentication in portable computing and critical portable equipment.
FAQ
What is the primary function of the BQ20Z80ADBT-V110G4 in a smart battery system?
The BQ20Z80ADBT-V110G4 serves as the core SBS 1.1-compliant gas gauge and safety manager in smart battery packs. It performs real-time Impedance Track™-based state-of-charge calculation, communicates battery parameters over SMBus, coordinates protection actions with the bq29312A AFE, and logs lifetime operational data-all within its 38-pin TSSOP package. Its firmware version V110 adds enhanced LED timing and fail-safe AFE communication handling.
Does the BQ20Z80ADBT-V110G4 require an external crystal oscillator?
No-the BQ20Z80ADBT-V110G4 includes an integrated 32.768-kHz oscillator that operates with a single 100-kΩ 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 device automatically detects and selects the active clock source at power-up.
How does the BQ20Z80ADBT-V110G4 achieve <1% gas-gauge accuracy over battery lifetime?
The BQ20Z80ADBT-V110G4 achieves <1% gas-gauge accuracy through its patented Impedance Track™ algorithm, which continuously models battery impedance changes due to aging, temperature, and load. It combines high-resolution measurements (0.65 nVh coulomb counting, <1 μV offset error) with dual thermistor inputs and auto-calibration to eliminate drift-eliminating the need for learning cycles while maintaining precision across 500+ charge/discharge cycles.
Can the BQ20Z80ADBT-V110G4 operate without the bq29312A analog front-end IC?
No-the BQ20Z80ADBT-V110G4 is explicitly designed to work with the bq29312A AFE, as stated in TI documentation. It relies on the bq29312A for cell voltage multiplexing (via VIN), FET drive control, and 1st/2nd level protection enforcement. Without the bq29312A, critical functions-including cell voltage reading, overcurrent protection, and cell balancing-cannot be implemented. The BQ20Z80ADBT-V110G4 does not contain integrated FET drivers or high-voltage analog switches.
What safety outputs does the BQ20Z80ADBT-V110G4 provide, and how are they used?
The BQ20Z80ADBT-V110G4 provides two complementary safety outputs: SAFE (pin 7, active-high) and SAFE (pin 12, active-low). These signals coordinate with external circuitry-such as fuse blow circuits or secondary protector ICs-to enforce irreversible shutdown during critical faults (e.g., safety overvoltage, cell imbalance, or AFE communication error). They are not intended for routine FET control but for fail-safe, permanent disablement of charge/discharge paths.
BQ20Z80ADBT-V110G4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Impedance Track™
- Package/Case:
- 38-TFSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- 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
BQ20Z80ADBT-V110G4 FAQ
1.How can I place an order for BQ20Z80ADBT-V110G4 through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ20Z80ADBT-V110G4 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 BQ20Z80ADBT-V110G4 reliable?
The price and inventory of BQ20Z80ADBT-V110G4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ20Z80ADBT-V110G4 is usually 5 days.
3.What payment methods are accepted for BQ20Z80ADBT-V110G4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ20Z80ADBT-V110G4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ20Z80ADBT-V110G4?
BQ20Z80ADBT-V110G4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ20Z80ADBT-V110G4 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 BQ20Z80ADBT-V110G4?
For technical support, including BQ20Z80ADBT-V110G4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ20Z80ADBT-V110G4 requirements.
6.How does Aetrix verify that BQ20Z80ADBT-V110G4 is sourced from the original manufacturer or authorized distributors?
All BQ20Z80ADBT-V110G4 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 BQ20Z80ADBT-V110G4 meets industry standards.
7.What is the process for return or replacement of BQ20Z80ADBT-V110G4?
All BQ20Z80ADBT-V110G4 units undergo pre-shipment inspection (PSI). If there is an issue with BQ20Z80ADBT-V110G4, 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 BQ20Z80ADBT-V110G4 part is unused and in its original packaging.
Return procedure for BQ20Z80ADBT-V110G4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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