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Texas Instruments BQ20Z80DBTR-V110
- Part No.:
- BQ20Z80DBTR-V110
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 38-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
BQ20Z80DBTR-V110.pdf
- Description:
- IC GAS GAUGE LI-ION 38TSSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
BQ20Z80DBTR-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-gauging error 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 BQ20Z80DBTR-V110 datasheet, BQ20Z80DBTR-V110 pinout, BQ20Z80DBTR-V110 application, or BQ20Z80DBTR-V110 equivalent, this page provides verified technical context, validated pin functions, confirmed SBS v1.1 command support, firmware-level differences of the -V110 revision, and real-world design implications for battery management system integration.
Technical Context
The BQ20Z80DBTR-V110 implements a RISC CPU core with integrated flash memory (768 bytes user flash) and dual delta-sigma ADCs: one for high-accuracy 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.
This revision adds DF.RemainingEnergyAlarm support, extends LED hold time to 255 s (vs. 16 s in -V102), disables permanent fuse blow during IT-disabled production testing, and improves AFE communication recovery after watchdog resets - all while maintaining backward compatibility with SBS v1.1 host systems and existing bq29312A hardware.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gas-gauge accuracy | Better than 1% error over battery lifetime; no learning cycle required due to Impedance Track™ modeling of aging, temperature, and discharge rate effects. |
| Coulomb counter resolution | 0.65 nVh - enables precise charge/discharge integration across ±0.25 V sense resistor voltage range (5–20 mΩ typical). |
| SMBus interface | SBS v1.1 compliant with PEC; supports master/slave modes; 10–100 kHz clock frequency; tTIMEOUT = 25–35 ms for bus error detection. |
| Operating temperature | –40°C to +85°C - validated for industrial and portable computing environments with full parameter performance. |
| Power consumption | 350 μA typical operating current; 8 μA sleep mode; 0.1 μA shutdown - enables long-term battery-pack monitoring without significant self-discharge. |
| Firmware revision | V110 - adds Remaining Energy Alarm, configurable LED hold time (max 255 s), PF disable during IT-off test, and robust AFE comm recovery after WD reset. |
| Oscillator option | Internal 32.768 kHz oscillator (100 kΩ ROSC resistor) or external crystal; start-up time ≤5 ms (internal), ≤200 ms (crystal). |
Pinout & Package
38-pin TSSOP (DBT) package with exposed thermal pad; RoHS-compliant; 0.65 mm pitch; body size 9.7 × 4.4 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Voltage measurement input | Connects to bq29312A CELL pin to acquire individual cell voltages under software-controlled 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 | Accept bipolar voltage drop (–0.25 V to +0.25 V) across 5–20 mΩ sense resistor for coulomb counting. |
| SAFE (pins 7 & 12) | Dual-safety outputs | Active-high and active-low complementary signals to drive external fuse-blow circuitry for irreversible fault isolation. |
| SMBC / SMBD | SMBus clock/data | Open-drain bidirectional I/O supporting SBS v1.1 timing (10–100 kHz); require pull-up resistors per bus topology. |
| LED1–LED5 | LED segment drivers | Five open-drain outputs supporting 3-/4-/5-segment LED display for remaining capacity indication (firmware-configurable). |
| RBI | Backup power input | Accepts capacitor or secondary battery to retain RAM and flash data during main supply brownout or removal. |
| XCK1 / XCK2 | Crystal oscillator I/O | Support external 32.768 kHz crystal (12 pF load); if unused, XCK1 tied to VSSA and ROSC resistor used instead. |
Key Features
| Feature | Design Value |
|---|---|
| Impedance Track™ algorithm | Real-time battery impedance modeling enables state-of-charge estimation independent of discharge history, eliminating calibration drift over 500+ cycles. |
| Lifetime data logging | Stores 13 critical parameters (e.g., lifetime min/max cell voltage, avg discharge current, max temp) in nonvolatile flash for warranty analysis and field failure root cause. |
| SHA-1 authentication | Enables secure host-to-battery challenge-response handshake to prevent counterfeit pack insertion in certified systems. |
| Cell balancing control | Configurable duty cycle (0.2–0.4) per cell; automatically activates during charging to equalize cell voltages and extend usable pack energy. |
| Two-tier safety architecture | First-level protection (OV/UV/OT/OC) handled by bq29312A; second-level alerts (fuse blow, imbalance, AFE comm error) asserted via SAFE pins. |
Applications
| Notebook PC Battery Packs | Medical Portable Analyzers |
|---|---|
Use Scenario: Integrated into removable Li-ion battery packs for Windows/Linux laptops requiring SBS v1.1 compliance and OEM battery authentication. IC Role / Device Role / Timing Role: Primary gas gauge and safety coordinator; communicates battery status, remaining capacity, and health metrics to EC/BIOS via SMBus. Use Value: Enables accurate runtime prediction (<1% error), prevents overcharge/overdischarge, and supports secure battery replacement policies via SHA-1. |
Use Scenario: Embedded in sealed battery modules for handheld blood analyzers and portable ECG devices needing FDA-grade reliability and traceable lifetime logs. IC Role / Device Role / Timing Role: Lifetime data logger and safety monitor; records min/max voltage/current/temperature for regulatory audit trails and predictive maintenance. Use Value: Provides tamper-proof operational history (e.g., max discharge current, thermal excursions) required for ISO 13485 medical device certification. |
| Industrial Test Equipment | High-Precision Portable Instrumentation |
Use Scenario: Used in rechargeable battery packs for handheld oscilloscopes, multimeters, and spectrum analyzers operating in variable ambient temperatures. IC Role / Device Role / Timing Role: Temperature-compensated fuel gauge; performs auto-calibration of sense resistor offset when SMBus idle ≥5 s. Use Value: Maintains <1% SoC accuracy across –20°C to +60°C operating range without recalibration, reducing field service visits. |
Use Scenario: Deployed in battery-powered gas chromatographs and environmental sensors requiring long deployment intervals and low-power sleep modes. IC Role / Device Role / Timing Role: Low-power system supervisor; enters 8 μA sleep mode between 1-second measurement intervals; wakes on SMBus activity or timer. Use Value: Extends battery life >6 months in storage while retaining full register state via RBI-supplied backup power. |
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 pinout and firmware base; adds Remaining Energy Alarm as standard feature (no V110 patch required); higher factory-programmed security key support. | Targeted at new designs requiring out-of-box energy-based alarm triggering and enhanced cryptographic key management. | Select BQ20Z90DBTR for green-field SBS v1.1 designs where extended alarm flexibility and future-proof security are prioritized. |
| BQ20Z75DBTR | Legacy variant; lacks V110 firmware features (e.g., extended LED hold, PF disable); lower flash endurance (10k vs. 20k write cycles); no SHA-1 support. | Suitable only for cost-sensitive legacy replacements where SBS v1.1 compliance and basic gauging suffice. | Choose BQ20Z75DBTR only for drop-in replacement in existing -V102/-V101 designs with no firmware update capability or security requirements. |
Compared with BQ20Z80DBTR-V110, BQ20Z90DBTR offers native energy-alarm functionality and stronger security provisioning, while BQ20Z75DBTR trades modern features for lower unit cost in non-critical applications - making the -V110 revision optimal for mid-life-cycle upgrades requiring enhanced diagnostics without hardware change.
Availability
BQ20Z80DBTR-V110 is available at Aetrix Electronics and suitable for notebook PC battery packs, medical portable analyzers, industrial test equipment, and high-precision portable instrumentation requiring stable component supply and long-term lifecycle support.
Supply support for BQ20Z80DBTR-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, power conversion, and signal chain solutions.
The BQ20Z80DBTR-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 gauging, multi-level safety, and lifetime data integrity in portable computing and medical devices.
FAQ
What distinguishes the BQ20Z80DBTR-V110 firmware revision from earlier versions?
The BQ20Z80DBTR-V110 introduces four key enhancements: (1) DF.RemainingEnergyAlarm support for energy-based low-battery warnings; (2) LED hold time extended to 255 seconds (from 16 s in -V102); (3) permanent fuse blow disabled during IT-off production testing; and (4) improved AFE communication recovery after watchdog resets. These changes improve usability, testability, and reliability without altering pinout or electrical specs.
Does the BQ20Z80DBTR-V110 require an external crystal, or can it operate with internal oscillation?
The BQ20Z80DBTR-V110 supports both configurations: an internal 32.768 kHz oscillator (using a 100 kΩ ±0.1% resistor between ROSC and VSSA) or an external 12-pF crystal connected to XCK1/XCK2. The device auto-detects presence of the crystal; only one method may be used - installing both invalidates oscillator performance per TI layout guidance.
How does the BQ20Z80DBTR-V110 achieve better-than-1% gas-gauge accuracy over battery lifetime?
The BQ20Z80DBTR-V110 achieves this via Impedance Track™ technology - a patented algorithm that continuously models battery impedance, open-circuit voltage, temperature, and aging effects in real time. Unlike coulomb counting alone, it corrects for capacity fade and voltage hysteresis, enabling accurate state-of-charge estimation across 500+ charge cycles without periodic full-discharge recalibration.
Can the BQ20Z80DBTR-V110 operate standalone, or does it require the bq29312A analog front-end?
The BQ20Z80DBTR-V110 is designed to operate exclusively with the bq29312A AFE. It relies on the bq29312A for cell voltage acquisition, FET gate driving, and primary safety protection. While the BQ20Z80DBTR-V110 hosts the gas-gauge algorithm and SMBus interface, its VIN, SR1/SR2, and SAFE pins are functionally coupled to the bq29312A - no standalone operation is supported or characterized.
What safety protections does the BQ20Z80DBTR-V110 implement, and how are they partitioned?
The BQ20Z80DBTR-V110 implements a two-tier safety architecture: first-level protections (cell/pack overvoltage/undervoltage, overtemperature, overcurrent) are executed by the bq29312A AFE; second-level alerts (cell imbalance, AFE communication failure, fuse-blow request) are generated by the BQ20Z80DBTR-V110 and asserted via complementary SAFE (pin 7) and SAFE (pin 12) outputs to trigger irreversible fuse blow or system shutdown.
BQ20Z80DBTR-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
BQ20Z80DBTR-V110 FAQ
1.How can I place an order for BQ20Z80DBTR-V110 through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ20Z80DBTR-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 BQ20Z80DBTR-V110 reliable?
The price and inventory of BQ20Z80DBTR-V110 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ20Z80DBTR-V110 is usually 5 days.
3.What payment methods are accepted for BQ20Z80DBTR-V110?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ20Z80DBTR-V110 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ20Z80DBTR-V110?
BQ20Z80DBTR-V110 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ20Z80DBTR-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 BQ20Z80DBTR-V110?
For technical support, including BQ20Z80DBTR-V110 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ20Z80DBTR-V110 requirements.
6.How does Aetrix verify that BQ20Z80DBTR-V110 is sourced from the original manufacturer or authorized distributors?
All BQ20Z80DBTR-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 BQ20Z80DBTR-V110 meets industry standards.
7.What is the process for return or replacement of BQ20Z80DBTR-V110?
All BQ20Z80DBTR-V110 units undergo pre-shipment inspection (PSI). If there is an issue with BQ20Z80DBTR-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 BQ20Z80DBTR-V110 part is unused and in its original packaging.
Return procedure for BQ20Z80DBTR-V110:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BQ20Z80DBTR-V110 Tags
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