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Texas Instruments BQ20Z90DBTV110
- Part No.:
- BQ20Z90DBTV110
- Manufacturer:
- Texas Instruments
- Category:
- Power Management - Specialized
- Package:
- -
- Datasheet:
-
BQ20Z90DBTV110.pdf
- Description:
- POWER SUPPLY SUPPORT CIRCUIT, AD
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Inventory:120
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Product details
Overview
BQ20Z90DBTV110 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-gauging accuracy over battery lifetime, supports 3–5-segment LED display drive, and integrates a 16-bit integrating delta-sigma coulomb counter with 0.65 nVh resolution. It operates in notebook PCs and portable instrumentation requiring precise remaining capacity reporting.
For engineers reviewing the BQ20Z90DBTV110 datasheet, BQ20Z90DBTV110 pinout, BQ20Z90DBTV110 application, or BQ20Z90DBTV110 equivalent, key selection criteria include SMBus v1.1 compliance, integrated coulomb counting with auto-calibration, dual thermistor support (TS1/TS2), safety-critical secondary protection via SAFE pin, and compatibility with bq29330 AFE for complete pack electronics.
Technical Context
The BQ20Z90DBTV110 implements a RISC-based fuel-gauge architecture that continuously models battery impedance, open-circuit voltage, self-discharge, and aging effects to compute remaining capacity without learning cycles. Its integrating delta-sigma ADC measures charge/discharge current across SRP/SRN with ±0.2 V input range and 10 µV offset error.
It interfaces exclusively via SMBus v1.1 (with PEC support) and HDQ-compatible signals, synchronizes with bq29330 AFE using SDATA/SCLK/CLKOUT, and executes protection decisions-including primary overvoltage/overcurrent and secondary fuse-blow triggers-using firmware-configurable data flash thresholds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gas-gauge accuracy | Better than 1% error over battery lifetime; no full-charge/discharge learning required. |
| Coulomb counter resolution | 0.65 nVh; enables high-precision charge integration for sub-1% capacity drift tracking. |
| SMBus interface | v1.1 compliant with PEC; supports master/slave modes and SBS command set (0x00–0x7F). |
| Operating temperature | –40°C to +85°C; validated for industrial and portable computing environments. |
| Supply voltage | 2.4 V to 2.6 V; low-voltage operation enables direct connection to battery-backed rails. |
| LED drive capability | 5-segment output (LED1–LED5); digitally adjustable drive current (3/4/5 mA) for status indication. |
| Data retention | 10 years in integrated 2-kB data flash; stores lifetime max/min voltage, temperature, current, and power logs. |
Pinout & Package
30-pin TSSOP (DBT) package with exposed thermal pad; RoHS-compliant, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 12, 15, 28 | NC | No internal connection; must be left floating per datasheet. |
| 2 | XALERT | Input from bq29330 AFE alert signal; triggers fault escalation on overvoltage/overcurrent events. |
| 3–4 | SDATA / SCLK | Bi-directional serial interface to bq29330 AFE; enables real-time cell voltage and protection status exchange. |
| 5 | CLKOUT | 32.768 kHz clock output; directly connected to bq29330 for synchronized timing and ADC sampling. |
| 6–7 | TS1 / TS2 | Analog inputs for NTC thermistors; supports dual-point temperature monitoring for thermal derating and safety cutoffs. |
| 22–23 | SRP / SRN | Differential sense inputs for battery current measurement; accepts ±0.2 V range across 5–20 mΩ shunt resistor. |
| 10 | SAFE | Active-high safety output; drives external fuse blow circuit upon secondary-level fault detection (e.g., cell imbalance, SOV). |
| 11, 13 | SMBD / SMBC | Open-drain SMBus data/clock lines; support bidirectional communication with host system per SBS v1.1 specification. |
| 29–30 | VCELL+ / VCELL− | Inputs from bq29330 for scaled individual cell voltage readings; used by Impedance Track™ algorithm for impedance modeling. |
Key Features
| Feature | Design Value |
|---|---|
| Impedance Track™ technology | Real-time battery impedance modeling eliminates need for periodic full-charge calibration; maintains <1% SoC error across aging and temperature variation. |
| Integrated coulomb counter | 16-bit integrating delta-sigma ADC with auto-calibration cancels SRP/SRN offset; achieves 0.65 nVh resolution for microampere-hour precision. |
| Two-tier safety architecture | Primary protection (cell/pack OV/UV, OC, OT) plus secondary enforcement (SAFE pin) for irreversible faults like cell imbalance or AFE failure. |
| SHA-1 authentication | Host-verifiable security prevents unauthorized firmware updates or counterfeit battery insertion in certified systems. |
| Lifetime data logging | 2-kB nonvolatile flash stores 12+ lifetime metrics (e.g., max/min cell voltage, discharge current, temperature) for warranty analysis and field failure root cause. |
Applications
| Notebook PC Battery Management | Medical Portable Instrumentation |
|---|---|
|
Use Scenario: Integrated into removable Li-ion battery packs for Windows/Linux laptops requiring SBS v1.1 compliance and accurate runtime estimation. IC Role / Device Role / Timing Role: Primary gas gauge and safety monitor; communicates remaining capacity, time-to-empty, and fault status via SMBus to EC/BIOS. Use Value: Enables OEMs to meet Microsoft ACPI battery reporting requirements while extending usable pack energy through cell-balancing algorithms. |
Use Scenario: Embedded in sealed medical battery modules for portable ultrasound, infusion pumps, or defibrillators needing traceable lifetime data and fail-safe shutdown. IC Role / Device Role / Timing Role: Dual-role fuel gauge and safety enforcer; logs temperature/voltage extremes and asserts SAFE pin on critical overtemperature or cell imbalance. Use Value: Meets IEC 62368-1 and UL 2054 requirements for secondary protection and provides auditable lifetime logs for regulatory submissions. |
| Test & Measurement Equipment | Industrial Handheld Terminals |
|
Use Scenario: Used in battery-powered oscilloscopes, multimeters, and spectrum analyzers requiring stable runtime under variable load and temperature. IC Role / Device Role / Timing Role: High-accuracy coulomb counter with auto-calibration; compensates for self-discharge and impedance shift during extended storage or field use. Use Value: Delivers consistent runtime prediction across –20°C to +60°C operating range, reducing user uncertainty during critical measurements. |
Use Scenario: Deployed in ruggedized warehouse scanners, RFID readers, and mobile POS terminals with hot-swappable battery packs. IC Role / Device Role / Timing Role: Smart battery controller with pulse charging support and 5-segment LED display; indicates remaining capacity without host intervention. Use Value: Reduces BOM count by eliminating external configuration EEPROM and discrete LED drivers; simplifies certification for EN 62368-1. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar gas-gauge applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ20Z95DBTR | Same Impedance Track™ core but adds integrated 32.768 kHz crystal oscillator; eliminates external crystal requirement. | Preferred for space-constrained designs where board area for crystal and load capacitors must be minimized. | Select BQ20Z95DBTR if crystal-free layout is prioritized; BQ20Z90DBTV110 retains flexibility for external clock source synchronization. |
| BQ20Z65-R1DBTR | Legacy SBS v1.0 device; lacks SHA-1 authentication, lifetime data logging, and secondary safety features like SAFE pin assertion. | Suitable only for cost-sensitive legacy systems without security or audit requirements. | Choose BQ20Z90DBTV110 when SBS v1.1 compliance, cryptographic authentication, or secondary fuse control is mandatory. |
Compared with BQ20Z95DBTR and BQ20Z65-R1DBTR, the BQ20Z90DBTV110 uniquely balances SBS v1.1 feature completeness-including SHA-1, dual thermistor support, and 2-kB lifetime logging-with proven field reliability in notebook and medical applications, while retaining external clock flexibility.
Availability
BQ20Z90DBTV110 is available at Aetrix Electronics and suitable for notebook PCs, medical portable instrumentation, and test equipment requiring stable component supply, long-term lifecycle support, and SBS v1.1-certified battery management.
Supply support for BQ20Z90DBTV110 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 over 50 years of innovation in battery management systems.
The BQ20Z90DBTV110 belongs to TI's Smart Battery Fuel Gauge product line, engineered specifically for high-accuracy, safety-critical Li-ion pack monitoring in portable computing and medical devices where runtime predictability and regulatory compliance are essential.
FAQ
What is the primary function of the BQ20Z90DBTV110 in a battery pack?
The BQ20Z90DBTV110 serves as a Smart Battery System (SBS) v1.1-compliant gas gauge IC that precisely measures and reports remaining battery capacity using Impedance Track™ technology. It monitors voltage, current, temperature, and cell impedance to deliver better than 1% accuracy over the battery's lifetime without requiring learning cycles. The BQ20Z90DBTV110 also manages primary and secondary safety functions and communicates results via SMBus to the host system.
Does the BQ20Z90DBTV110 require an external crystal oscillator?
No, the BQ20Z90DBTV110 integrates both high-frequency (4.194 MHz) and low-frequency (32.768 kHz) oscillators, eliminating the need for external crystals. Its CLKOUT pin provides the 32.768 kHz signal to the bq29330 AFE for synchronized operation. This integration reduces BOM count and PCB footprint compared to solutions requiring discrete timing components. The BQ20Z90DBTV110 remains fully functional without any external crystal.
How does the BQ20Z90DBTV110 handle battery safety protection?
The BQ20Z90DBTV110 implements a two-tier safety architecture: primary protection (e.g., cell overvoltage, discharge overcurrent, overtemperature) and secondary enforcement via the SAFE pin. When critical faults like cell imbalance or safety overvoltage occur, the BQ20Z90DBTV110 asserts SAFE high to trigger external fuse blow. All thresholds are configurable in data flash, and the device logs safety events for post-failure analysis-ensuring robust compliance with UL 2054 and IEC 62368-1.
Can the BQ20Z90DBTV110 operate independently of the bq29330 AFE?
No, the BQ20Z90DBTV110 is designed to work in tandem with the bq29330 analog front-end IC. It relies on bq29330 for cell voltage scaling (via VCELL+/VCELL−), protection FET control, and thermistor biasing. While the BQ20Z90DBTV110 performs gas gauging and safety logic, the bq29330 handles high-side switching, cell balancing, and analog signal conditioning. Their interface uses dedicated pins (SDATA, SCLK, CLKOUT, XALERT) and is not interchangeable with other AFEs.
What communication protocols does the BQ20Z90DBTV110 support?
The BQ20Z90DBTV110 supports SMBus v1.1 with packet error checking (PEC) as its primary host interface, fully compliant with the Smart Battery Specification. It also supports HDQ-compatible signaling for single-wire debug access. Communication occurs over open-drain SMBD and SMBC pins, with timing validated for 10–100 kHz operation. The BQ20Z90DBTV110 does not support I²C, SPI, or UART natively; all host interaction follows the SBS command set (0x00–0x7F).
BQ20Z90DBTV110 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Applications:
- -
- Current - Supply:
- -
- Voltage - Supply:
- -
- Operating Temperature:
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- Grade:
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- Qualification:
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BQ20Z90DBTV110 FAQ
1.How can I place an order for BQ20Z90DBTV110 through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ20Z90DBTV110 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 BQ20Z90DBTV110 reliable?
The price and inventory of BQ20Z90DBTV110 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ20Z90DBTV110 is usually 5 days.
3.What payment methods are accepted for BQ20Z90DBTV110?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ20Z90DBTV110 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ20Z90DBTV110?
BQ20Z90DBTV110 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ20Z90DBTV110 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 BQ20Z90DBTV110?
For technical support, including BQ20Z90DBTV110 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ20Z90DBTV110 requirements.
6.How does Aetrix verify that BQ20Z90DBTV110 is sourced from the original manufacturer or authorized distributors?
All BQ20Z90DBTV110 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 BQ20Z90DBTV110 meets industry standards.
7.What is the process for return or replacement of BQ20Z90DBTV110?
All BQ20Z90DBTV110 units undergo pre-shipment inspection (PSI). If there is an issue with BQ20Z90DBTV110, 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 BQ20Z90DBTV110 part is unused and in its original packaging.
Return procedure for BQ20Z90DBTV110:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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