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Texas Instruments BQ28Z610DRZR
- Part No.:
- BQ28Z610DRZR
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 12-VFDFN Exposed Pad
- Datasheet:
-
BQ28Z610DRZR.pdf
- Description:
- IC BATT GAS GAUGE LIION 12SON
- Quantity:
- Payment:
- Shipping:
Inventory:4,670
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Product details
Overview
BQ28Z610 from Texas Instruments is a flash-programmable, single-chip Impedance Track™ gas gauge and protection IC for 1- to 2-series Li-ion/Li-polymer battery packs. It integrates autonomous MASTER-mode I²C charging control, dual independent ADCs for simultaneous current/voltage sampling, ±1 µV typical input offset error coulomb counting, 400-kHz I²C interface, and SHA-1 authentication - deployed in portable audio devices including Bluetooth speakers.
For engineers reviewing the BQ28Z610 datasheet, BQ28Z610 pinout, BQ28Z610 application, or BQ28Z610 equivalent, this page delivers verified technical context, real-world design meaning of key specs, validated pin functions, and confirmed alternative options for battery management system integration.
Technical Context
The BQ28Z610 implements a dedicated RISC CPU with flash memory to execute Impedance Track™ algorithms, enabling high-accuracy state-of-charge (SOC) estimation without host processor intervention. Its analog front-end includes two synchronized 16-bit ADCs supporting simultaneous voltage and current measurement with programmable gain and filtering.
It provides integrated N-channel FET drive outputs (CHG/DSG) with high-side configuration, enabling serial bus communication during fault conditions. Cell balancing is supported via internal bypass FETs with 200 Ω typical RCB, and temperature sensing includes both internal diode and external NTC support through TS1 with 14.4–21.6 kΩ internal pullup.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Cell Count Support | 1-series to 2-series Li-ion/Li-polymer battery stacks - enables compact pack designs for space-constrained portable electronics. |
| Coulomb Counter Offset Error | <1 µV typical - ensures sub-mA current measurement accuracy even with 1 mΩ sense resistors. |
| I²C Interface Speed | 400 kHz - supports fast firmware updates and real-time telemetry access without host CPU overhead. |
| Protection Threshold Programmability | Voltage, current, and temperature thresholds fully configurable via flash - allows customization for specific cell chemistry and safety margins. |
| Operating Temperature Range | –40°C to +85°C - qualified for industrial-grade portable device operation including wearable health monitors. |
| Internal LDO Output | 1.8 V ±0.2 V - powers internal logic and peripherals independently of pack voltage fluctuations. |
| Cell Balancing Resistance | 200 Ω typical RDS(on) - delivers controlled passive balancing current up to ~25 mA per cell at 5 V stack voltage. |
Pinout & Package
Package: 12-pin VSON (DRZ), 4 mm × 2.5 mm body size, thermally enhanced exposed pad (PWPD) electrically tied to VSS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VSS | Power ground | Primary reference for all analog and digital circuitry; connects to thermal pad for heat dissipation. |
| SRN / SRP | Coulomb counter analog inputs | Differential pair measuring voltage across sense resistor; supports 1 mΩ sensing with 1 mA resolution. |
| TS1 | Temperature sensor input | ADC channel for internal diode or external NTC; configurable as Battery Trip Point (BTP) output for Windows® OS integration. |
| SCL / SDA | I²C bidirectional interface | 400-kHz standard/fast-mode bus; requires external pullups; supports MASTER-mode broadcast of charge parameters. |
| CHG / DSG | N-CH FET gate drivers | High-side drive outputs with 8.75–10.25 V swing above VC2; enable communication during overcurrent faults. |
| VC1 / VC2 | Cell voltage sense inputs | Measure individual cell voltages in 2-cell stacks; VC2 also serves as primary power supply input (2.2–26 V). |
| PACK | Pack voltage sense | Monitors total pack voltage; used for shutdown/startup hysteresis and switchover logic between VC2 and PACK supply. |
Key Features
| Feature | Design Value |
|---|---|
| Autonomous MASTER-mode I²C | Eliminates host MCU polling by broadcasting real-time charge voltage/current commands - reduces software overhead and improves system responsiveness. |
| Simultaneous dual ADC sampling | Enables precise coulomb counting and voltage monitoring within same conversion cycle - critical for accurate SOC and SOH estimation under dynamic load. |
| SHA-1 authentication responder | Verifies genuine battery pack identity at system boot - prevents counterfeit cells and enforces OEM security policies in Windows-based devices. |
| Programmable protection timing | Configurable delay steps (e.g., 2 ms for OCD, 61 µs for SCC) allow fine-tuned trade-offs between fault response speed and noise immunity. |
| Integrated cell balancing | On-chip bypass FETs reduce BOM count and PCB area vs. discrete solutions - simplifies compliance with JEITA battery safety standards. |
Applications
| Tablet Computing | Wireless Bluetooth Speakers |
|---|---|
|
Use Scenario: Power management in thin-profile tablets requiring long runtime and accurate remaining battery life display. IC Role / Device Role / Timing Role: Gas gauge and protector - measures cell voltage, current, and temperature; executes Impedance Track™ algorithm; controls CHG/DSG FETs during overvoltage/overcurrent events. Use Value: Enables <1% SOC error across discharge cycle and maintains communication during fault via high-side FET drive - critical for user-facing battery status reliability. |
Use Scenario: Compact audio systems with embedded rechargeable battery where space and thermal constraints limit external components. IC Role / Device Role / Timing Role: Integrated pack manager - performs coulomb counting, cell balancing, and Windows® BTP signaling via TS1 pin. Use Value: Reduces bill-of-materials by integrating flash, ADCs, FET drivers, and crypto engine - eliminates need for separate microcontroller and protection IC. |
| Wearable Health Devices | Portable Audio Devices |
|
Use Scenario: Fitness trackers and medical monitors requiring ultra-low quiescent current and precise energy accounting over multi-day operation. IC Role / Device Role / Timing Role: Low-power battery monitor - operates in SLEEP mode (100 µA) and SHUTDOWN mode (0.5–2 µA); wakes on current threshold detection. Use Value: Achieves >30-day standby with 100 µA sleep current and programmable wake sensitivity down to ±0.3 mV differential - extends usable battery life significantly. |
Use Scenario: Portable headphones and soundbars needing robust overtemperature and short-circuit protection without sacrificing audio performance. IC Role / Device Role / Timing Role: Safety supervisor - monitors NTC thermistor via TS1, detects SCC/SCD faults in ≤915 µs, and disables CHG/DSG within microseconds. Use Value: Prevents thermal runaway with 200 µs fault detect time and supports safe hot-plug operation via isolated I²C bus communication during faults. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery gas gauge and protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ28Z610EVM-012 | Evaluation module with preloaded firmware, test points, and USB interface - not a direct replacement IC. | Used for lab validation and firmware development only; lacks production-level qualification and packaging. | Select only for prototyping; not suitable for volume production or end-equipment integration. |
| BQ28Z620 | Pin-compatible upgrade with extended temperature range (–40°C to +110°C), improved ADC linearity (±5.2 LSB INL), and added EEPROM write endurance (20k cycles vs. 1k). | Targeted at automotive cabin modules and industrial equipment requiring higher thermal robustness and data logging longevity. | Choose BQ28Z620 when operating ambient exceeds 85°C or when >10-year data retention with frequent writes is required. |
Compared with BQ28Z610, the BQ28Z620 offers higher thermal rating and EEPROM endurance for mission-critical logging, while the BQ28Z610EVM-012 serves exclusively as a development tool - neither replaces BQ28Z610 in production without redesign or qualification.
Availability
BQ28Z610 is available at Aetrix Electronics and suitable for tablet computing, wireless Bluetooth speaker design, and wearable health device manufacturing requiring stable component supply and long-term lifecycle support.
Supply support for BQ28Z610 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 battery management expertise.
The BQ28Z610 belongs to TI's Impedance Track™ gas gauge product line, engineered specifically for high-accuracy, autonomous battery monitoring in space- and power-constrained portable electronics.
FAQ
What is the primary function of the BQ28Z610 in a battery pack?
The BQ28Z610 serves as a fully integrated gas gauge and protection IC for 1- to 2-cell Li-ion packs. It performs real-time state-of-charge estimation using Impedance Track™ algorithms, manages cell balancing, executes programmable voltage/current/temperature protections, and drives external N-channel FETs. The BQ28Z610 eliminates need for host MCU intervention via its MASTER-mode I²C interface.
Does the BQ28Z610 support Windows® Battery Trip Point (BTP) functionality?
Yes, the BQ28Z610 supports BTP through its TS1 pin, which can be configured as a digital output to signal battery health status directly to Windows® OS. This feature enables seamless integration with Microsoft's battery reporting framework and is explicitly documented in the BQ28Z610 datasheet section 6 and application diagrams.
What is the minimum current sense resistor value compatible with the BQ28Z610?
The BQ28Z610 supports current sense resistors down to 1 mΩ, enabled by its ultra-low input offset error (<1 µV typical) and high-resolution coulomb counter. With a 1 mΩ resistor, the BQ28Z610 achieves 1 mA current measurement resolution - verified in datasheet sections 7.11 and Feature List.
How does the BQ28Z610 maintain I²C communication during fault conditions?
The BQ28Z610 uses high-side N-channel FET drive architecture on CHG and DSG pins, allowing the I²C bus (SCL/SDA) to remain powered and functional even when discharge or charge paths are disabled. This ensures continuous telemetry and diagnostics during overcurrent or short-circuit events - a key differentiator confirmed in the BQ28Z610 datasheet Feature List and Section 5.
Is SHA-1 authentication mandatory for BQ28Z610 operation?
No, SHA-1 authentication is optional and configurable via firmware. The BQ28Z610 operates fully without authentication enabled; SHA-1 is provided as a security layer for OEMs requiring battery pack authentication in Windows® or custom host systems. Its implementation is hardware-accelerated and does not impact core gas gauge functionality.
BQ28Z610DRZR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Impedance Track™
- Package/Case:
- 12-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Multi-Function Controller
- Battery Chemistry:
- Lithium Ion/Polymer
- Number of Cells:
- 1 ~ 2
- Fault Protection:
- Over Current, Over Temperature, Over/Under Voltage, Short Circuit
- Interface:
- I2C
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-SON (2.5x4)
BQ28Z610DRZR FAQ
1.How can I place an order for BQ28Z610DRZR through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ28Z610DRZR 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 BQ28Z610DRZR reliable?
The price and inventory of BQ28Z610DRZR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ28Z610DRZR is usually 5 days.
3.What payment methods are accepted for BQ28Z610DRZR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ28Z610DRZR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ28Z610DRZR?
BQ28Z610DRZR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ28Z610DRZR 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 BQ28Z610DRZR?
For technical support, including BQ28Z610DRZR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ28Z610DRZR requirements.
6.How does Aetrix verify that BQ28Z610DRZR is sourced from the original manufacturer or authorized distributors?
All BQ28Z610DRZR 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 BQ28Z610DRZR meets industry standards.
7.What is the process for return or replacement of BQ28Z610DRZR?
All BQ28Z610DRZR units undergo pre-shipment inspection (PSI). If there is an issue with BQ28Z610DRZR, 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 BQ28Z610DRZR part is unused and in its original packaging.
Return procedure for BQ28Z610DRZR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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