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Texas Instruments BQ20Z80ADBT-V110
- Part No.:
- BQ20Z80ADBT-V110
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 38-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
BQ20Z80ADBT-V110.pdf
- Description:
- IC GAS GAUGE BQ29312A 38-TSSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
BQ20Z80ADBT-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. It delivers better than 1% gas-gauge accuracy over battery lifetime, measures charge flow with 0.65 nVh resolution via a 16-bit delta-sigma ADC, and operates with the bq29312A analog front-end (AFE) to provide full pack protection and cell balancing. It is used in notebook PCs and portable medical instrumentation requiring precise remaining capacity reporting and lifetime data logging.
For engineers reviewing the BQ20Z80ADBT-V110 datasheet, BQ20Z80ADBT-V110 pinout, BQ20Z80ADBT-V110 application, or BQ20Z80ADBT-V110 equivalent, this page provides verified technical context, validated pin functions, confirmed SBS v1.1 command support, real-world power mode behavior (Normal/Sleep/Shutdown), and documented firmware-level differences between V102 and V110 revisions - all critical for smart battery firmware integration and safety-critical pack design.
Technical Context
The BQ20Z80ADBT-V110 implements a RISC CPU core with integrated 768-byte user flash and RAM registers, executing Impedance Track™ algorithms to model battery impedance and compute state-of-charge without learning cycles. It interfaces exclusively via SMBus v1.1 (with PEC), supports dual thermistor inputs (TS1/TS2), and uses SR1/SR2 differential inputs for current sensing across 5–20 mΩ sense resistors.
Its safety architecture includes two-tier overvoltage/overcurrent protection coordinated with the bq29312A AFE, plus independent SAFE pins (pins 7 and 12) for fuse-blow control. Firmware revision V110 adds Remaining Energy Alarm support, extends LED hold time to 255 s, disables permanent fail fuse blow when IT is inactive, and fixes partial-reset handling of CHG_off flag - all confirmed in TI's SLUS782 change log.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gas Gauge Accuracy | Better than 1% error over battery lifetime - enables reliable runtime prediction without recalibration cycles. |
| Coulomb Counter Resolution | 0.65 nVh - achieves sub-mAh charge/discharge measurement precision with typical 5–20 mΩ sense resistors. |
| SMBus Compliance | SBS v1.1 with PEC - ensures interoperability with host systems implementing Smart Battery Data Specification. |
| Operating Temperature | –40°C to +85°C - qualified for industrial and portable computing environments including medical devices. |
| Power Modes | Normal (1-s update), Sleep (configurable interval), Shutdown (0.1 μA) - reduces quiescent current during idle states. |
| Firmware Revision | V110 - adds Remaining Energy Alarm, disables accidental PF blow, extends LED hold time to 255 s, fixes partial-reset FET control. |
| Package | 38-pin TSSOP (DBT) - surface-mount footprint compatible with automated assembly for battery pack PCBs. |
Pinout & Package
38-pin Thin Shrink Small Outline Package (TSSOP-DBT), 0.65 mm pitch, exposed thermal pad (not electrically connected). Pin 1 marked by beveled corner; top-side marking includes "BQ20Z80A" and date code.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VIN | Voltage measurement input | Connects to AFE CELL output for series cell voltage acquisition via bq29312A multiplexing. |
| 2 TS1 / 3 TS2 | Thermistor inputs | Dual NTC inputs supporting Semitec 103AT or equivalent; enable dual-point temperature monitoring. |
| 4 PU / 5 PRES | System presence detection | PU pulls high periodically; PRES detects system insertion via external pull-down resistor (~5 kΩ). |
| 7 & 12 SAFE | Safety outputs | Active-high (pin 7) and active-low (pin 12) complementary signals for fuse-blow control per secondary safety events. |
| 9 RBI | Backup power input | Accepts capacitor or battery to retain register data during main supply brownout or removal. |
| 15 SMBC / 16 SMBD | SMBus interface | Open-drain bidirectional clock/data lines compliant with SBS v1.1 timing (10–100 kHz). |
| 27 SR2 / 28 SR1 | Current sense inputs | Differential inputs for measuring voltage drop across external sense resistor (5–20 mΩ typical). |
| 33 XCK2/ROSC / 34 XCK1/VSSA | Oscillator interface | Supports internal oscillator (100-kΩ ROSC resistor) or external 32.768-kHz crystal - not both. |
Key Features
| Feature | Design Value |
|---|---|
| Impedance Track™ algorithm | Enables instant-accuracy gas gauging without learning cycles by modeling battery impedance vs. SoC and aging. |
| Lifetime data logging | Records 13 parameters (e.g., min/max cell voltage, avg discharge current, lifetime temp) for warranty analysis and failure diagnostics. |
| Cell balancing control | Drives external FETs to equalize cell voltages during charging; duty cycle configurable per cell count (e.g., 0.4 for ≤4 cells). |
| SHA-1 authentication | Verifies host identity using challenge-response protocol to prevent unauthorized access to battery configuration and data. |
| Programmable safety thresholds | Configurable overvoltage, undervoltage, overtemperature, and overcurrent limits via SBS commands (e.g., 0x19 DesignVoltage). |
Applications
| Notebook PC Battery Packs | Medical Portable Diagnostic Devices |
|---|---|
|
Use Scenario: Integrated into removable Li-ion battery packs for ultrabooks and 2-in-1 laptops requiring accurate runtime estimation and SBS-compliant communication with OS power management. IC Role / Device Role / Timing Role: Primary gas gauge and safety manager; communicates battery status via SMBus to EC/BIOS every second in Normal mode. Use Value: Delivers <1% SoC error over 500+ cycles, eliminating unexpected shutdowns and enabling adaptive power policies based on true remaining energy. |
Use Scenario: Embedded in sealed battery modules for handheld ultrasound, blood glucose meters, and portable ECG monitors where regulatory traceability and lifetime logging are mandatory. IC Role / Device Role / Timing Role: Lifetime data logger and safety enforcer; stores min/max voltage/current/temperature for FDA audit trails and performs dual-level fault detection. Use Value: Captures 13 lifetime metrics (e.g., max discharge power, avg temperature) with SHA-1-secured read access - satisfies IEC 62304 software lifecycle requirements. |
| Industrial Test Equipment Batteries | High-Reliability Portable Instrumentation |
|
Use Scenario: Used in battery-backed multimeters, oscilloscope probes, and calibration tools needing stable capacity reporting across wide temperature ranges (–40°C to +85°C). IC Role / Device Role / Timing Role: Precision coulomb counter with auto-calibrating delta-sigma ADC; updates current/voltage every second while maintaining <1 μV offset error. Use Value: Achieves 0.65 nVh resolution and <1 μV offset - ensures mA-level current measurement accuracy even after thermal cycling and long-term storage. |
Use Scenario: Deployed in ruggedized handheld analyzers for field environmental testing (e.g., gas detection, water quality) requiring robust fault handling and secure firmware updates. IC Role / Device Role / Timing Role: Dual-safe controller interfacing with bq29312A; asserts SAFE pins on secondary faults (cell imbalance, AFE comm error, fuse blow failure). Use Value: Provides hardware-enforced fail-safe response (e.g., permanent fuse disable) and logs root-cause data - meets SIL-2 functional safety expectations for portable instruments. |
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 | Same Impedance Track™ engine and DBT package; adds extended SBS commands (e.g., 0x4F StateOfHealth), supports higher cell counts (up to 6), and includes enhanced authentication key management. | Targeted at 6-cell EV tools and high-end medical carts requiring SoH trending and multi-key security; lacks V110-specific LED hold time extension. | Select BQ20Z90DBTR when lifetime health analytics and >4-cell support are required; verify compatibility with existing bq29312A AFE layout. |
| BQ20Z75DBTR | Legacy variant with identical pinout and core gas-gauging; omits V110 firmware features (Remaining Energy Alarm, PF disable), has lower EEPROM endurance (10k vs. 20k write cycles), and no SHA-1 support. | Suitable for cost-sensitive consumer electronics where basic SBS compliance suffices and firmware updates are infrequent. | Choose BQ20Z75DBTR only for legacy designs or non-security-critical applications; avoid where SHA-1 authentication or V110 safety fixes are mandated. |
Compared with BQ20Z80ADBT-V110, BQ20Z90DBTR offers expanded diagnostics and scalability but requires updated firmware stack, while BQ20Z75DBTR sacrifices security and modern safety logic for lower BOM cost - making BQ20Z80ADBT-V110 the optimal balance of certified accuracy, production-ready safety, and field-proven reliability.
Availability
BQ20Z80ADBT-V110 is available at Aetrix Electronics and suitable for notebook PC battery packs, portable medical diagnostic devices, and industrial test equipment requiring stable component supply, long-lifecycle support, and TI-qualified SBS v1.1 compliance.
Supply support for BQ20Z80ADBT-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 company specializing in analog and embedded processing technologies, with leadership in battery management ICs since the 1990s.
The BQ20Z80ADBT-V110 belongs to TI's Smart Battery Fuel Gauge product line, engineered specifically for SBS v1.1–compliant Li-ion/Li-polymer battery packs requiring high-accuracy gas gauging, lifetime data logging, and dual-tier safety enforcement in portable computing and medical applications.
FAQ
What distinguishes BQ20Z80ADBT-V110 from earlier BQ20Z80 revisions?
The BQ20Z80ADBT-V110 firmware introduces four key improvements over V102: (1) Remaining Energy Alarm support for mWh-based low-battery warnings, (2) configurable disable of permanent fail (PF) fuse blow during IT-inactive states, (3) extended LED hold time up to 255 seconds for reliable capacity indication, and (4) corrected AFE communication recovery during partial resets. These changes are documented in TI's SLUS782 change log Table 3.
Does BQ20Z80ADBT-V110 require an external crystal oscillator?
No - the BQ20Z80ADBT-V110 supports both internal and external clock sources. With a 100-kΩ ±0.1% resistor connected between pin 33 (XCK2/ROSC) and pin 34 (XCK1/VSSA), it uses its internal 32.768-kHz oscillator. Alternatively, a 12-pF 32.768-kHz crystal can be attached to pins 33/34. TI explicitly warns against installing both simultaneously, as this degrades oscillator stability.
How does BQ20Z80ADBT-V110 interface with the bq29312A analog front-end?
The BQ20Z80ADBT-V110 communicates with the bq29312A AFE via dedicated control and feedback signals: VIN receives multiplexed cell voltages from bq29312A's CELL pin; SCLK/SDATA coordinate AFE configuration; SAFE pins trigger fuse control; and XALERT (pin 25) reports AFE fault status. This tight coupling enables coordinated primary/secondary protection and cell balancing under Impedance Track™ supervision.
What safety protections are implemented in BQ20Z80ADBT-V110?
The BQ20Z80ADBT-V110 implements two-tier safety: Primary protections include cell/pack over/undervoltage, charge/discharge overcurrent (3× discharge, 2× charge), short-circuit, and overtemperature detection. Secondary protections - signaled via SAFE pins - cover safety overvoltage, cell imbalance, AFE communication errors, and fuse blow failure. All are configurable via SBS commands and enforce hardware-level responses.
Can BQ20Z80ADBT-V110 operate without the bq29312A AFE?
No - the BQ20Z80ADBT-V110 is designed exclusively to work with the bq29312A analog front-end. Its VIN, SCLK, SDATA, SAFE, XALERT, and DISP pins are functionally dependent on bq29312A signals. TI's datasheet states: "The bq20z80 features are only available with the bq29312A," and the system diagram shows inseparable signal routing between the two ICs for voltage measurement, FET control, and safety enforcement.
BQ20Z80ADBT-V110 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Impedance Track™
- Package/Case:
- 38-TFSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- 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
BQ20Z80ADBT-V110 FAQ
1.How can I place an order for BQ20Z80ADBT-V110 through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ20Z80ADBT-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 BQ20Z80ADBT-V110 reliable?
The price and inventory of BQ20Z80ADBT-V110 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ20Z80ADBT-V110 is usually 5 days.
3.What payment methods are accepted for BQ20Z80ADBT-V110?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ20Z80ADBT-V110 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ20Z80ADBT-V110?
BQ20Z80ADBT-V110 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ20Z80ADBT-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 BQ20Z80ADBT-V110?
For technical support, including BQ20Z80ADBT-V110 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ20Z80ADBT-V110 requirements.
6.How does Aetrix verify that BQ20Z80ADBT-V110 is sourced from the original manufacturer or authorized distributors?
All BQ20Z80ADBT-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 BQ20Z80ADBT-V110 meets industry standards.
7.What is the process for return or replacement of BQ20Z80ADBT-V110?
All BQ20Z80ADBT-V110 units undergo pre-shipment inspection (PSI). If there is an issue with BQ20Z80ADBT-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 BQ20Z80ADBT-V110 part is unused and in its original packaging.
Return procedure for BQ20Z80ADBT-V110:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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