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Texas Instruments BQ28Z610DRZT
- Part No.:
- BQ28Z610DRZT
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 12-VFDFN Exposed Pad
- Datasheet:
-
BQ28Z610DRZT.pdf
- Description:
- IC FUEL GAUGE LI-ION 1-2CL 12SON
- Quantity:
- Payment:
- Shipping:
Inventory:8,941
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Product details
Overview
BQ28Z610 from Texas Instruments is a flash-programmable, Impedance Track™ gas gauge and integrated protection IC for 1- to 2-cell Li-ion/Li-polymer battery packs. It delivers autonomous charger control via Master Mode I²C, supports cell balancing with internal bypass FETs, provides high-side N-CH FET drive for fault-resilient communication, and achieves ±1 µV typical input offset error in its coulomb counter - enabling accurate state-of-charge estimation down to 1-mA current with 1-mΩ sense resistors.
For engineers reviewing the BQ28Z610 datasheet, BQ28Z610 pinout, BQ28Z610 application, or BQ28Z610 equivalent, this page details its dual ADC architecture, programmable overvoltage/overcurrent/temperature protection thresholds, SHA-1 authentication responder, 400-kHz I²C interface, and VSON-12 package integration - all critical for portable audio, tablet, and wearable health device design.
Technical Context
The BQ28Z610 integrates a TI BQBMP RISC processor, dual independent ADCs (simultaneous voltage/current sampling), and flash memory for firmware customization. Its analog front-end includes two precision voltage references (VREF1/VREF2 = 1.220 V ±50 ppm/°C), a 16-bit coulomb counter with <1 µV offset, and configurable current wake comparators with four sensitivity ranges (±0.3 mV to ±7.2 mV).
Protection logic operates independently of host software: it monitors pack voltage (VC2, PACK), cell voltages (VC1, VC2), temperature (TS1, NTC), and current (SRP/SRN) to trigger CHG/DSG FET control. Cell balancing uses internal 200-Ω FET switches, and the high-side N-CH driver enables I²C communication even during discharge faults.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Cell Count Support | 1-series to 2-series Li-ion/Li-polymer cells - enables compact single- or dual-cell pack designs without external multiplexing. |
| Coulomb Counter Offset Error | <1 µV (typical) - ensures sub-1-mA current measurement accuracy with 1-mΩ sense resistors, critical for low-power wearables. |
| I²C Interface Speed | 400 kHz - supports high-speed configuration and real-time telemetry updates without host CPU overhead. |
| Protection Threshold Programmability | Voltage, current, and temperature thresholds are user-configurable via flash - allows tailoring to specific battery chemistry and safety standards. |
| Internal Cell Balancing | On-chip 200-Ω FET switch per cell - enables passive balancing without external components, optimizing pack longevity and SOC accuracy. |
| Authentication Security | SHA-1 responder - prevents counterfeit battery packs in Windows-integrated systems via Battery Trip Point (BTP) handshake. |
| Operating Temperature Range | –40°C to +85°C - validated for industrial-grade portable electronics including tablets and Bluetooth speakers. |
Pinout & Package
Package: 12-pin VSON (DRZ), 4 mm × 2.5 mm body size, thermal pad (PWPD) electrically connected to VSS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VSS | Power ground | Primary reference for all analog and digital circuits; connects to exposed thermal pad for thermal dissipation. |
| SRN / SRP | Coulomb counter analog inputs | Differential pair measuring voltage across sense resistor; supports ±100 mV full-scale range with 16-bit resolution. |
| TS1 | Temperature sensor input | Analog input for internal temp sensor or external NTC thermistor; also serves as Battery Trip Point (BTP) output for Windows OS integration. |
| SCL / SDA | I²C serial interface | Open-drain bidirectional bus pins requiring external pull-ups; support 400-kHz operation and Master Mode broadcasts for autonomous charging. |
| DSG / CHG | N-CH FET gate drivers | High-side drivers controlling discharge and charge FETs; enable serial communication during fault conditions by maintaining VCC from pack. |
| PACK | Pack voltage sense | Direct connection to battery pack positive terminal; used for overvoltage/undervoltage detection and power switchover control. |
| VC1 / VC2 | Cell voltage inputs | VC1 senses least-positive cell; VC2 senses most-positive cell or total pack voltage; support cell balancing current injection. |
| PBI | Backup power input | Accepts external capacitor (2.2 µF typical) to maintain RTC and SRAM during main pack disconnect - ensures data retention during hot-swap. |
Key Features
| Feature | Design Value |
|---|---|
| Autonomous Master Mode I²C | Eliminates host MCU polling overhead by broadcasting charging voltage/current commands directly to compatible chargers - reduces system power and firmware complexity. |
| Simultaneous Dual-ADC Sampling | Enables true time-aligned voltage and current acquisition - essential for impedance-based SOC modeling and dynamic load compensation. |
| Programmable Protection Timing | OCD/SCD/SCC delay times adjustable in discrete steps (e.g., OCD delay from 1 ms to 31 ms) - allows precise trade-off between response speed and false-trigger immunity. |
| Integrated SHA-1 Authentication | Validates battery authenticity at boot and during BTP handshakes - prevents unsafe third-party packs in certified Windows devices. |
| Low-Power Sleep Mode | 100 µA typical supply current - extends shelf life and standby runtime in always-on portable health monitors and audio peripherals. |
Applications
| Tablet Computing | Wireless Bluetooth Speakers |
|---|---|
|
Use Scenario: Power management for thin, fanless tablets with dual-cell Li-polymer batteries requiring precise remaining runtime prediction and thermal-safe charging. IC Role / Device Role / Timing Role: Gas gauge and protection controller managing cell balancing, coulomb counting, and overtemperature shutdown while enabling Windows BTP compliance. Use Value: Delivers <1% SOC error across 0–100% DoD and supports fast-charge protocols without host intervention via Master Mode I²C. |
Use Scenario: Compact speaker enclosures with sealed 2S Li-ion packs needing robust short-circuit protection and seamless USB-C PD charging handoff. IC Role / Device Role / Timing Role: Standalone battery manager providing autonomous charge control, cell voltage monitoring, and fault-isolated I²C communication during DSG FET activation. Use Value: Enables high-fidelity audio playback continuity during transient overcurrent events by maintaining I²C bus activity via high-side FET drive. |
| Portable Health Monitors | Wearable Fitness Trackers |
|
Use Scenario: Clinical-grade ECG and SpO₂ monitors operating on single-cell Li-ion with strict low-power requirements and FDA-compliant safety logging. IC Role / Device Role / Timing Role: Safety-critical fuel gauge performing real-time coulomb integration, NTC thermistor measurement, and SHA-1-secured firmware updates. Use Value: Achieves 1-mA current resolution with 1-mΩ shunt - enabling accurate battery lifetime tracking over 500+ charge cycles under variable sensor loads. |
Use Scenario: Slim wrist-worn trackers with constrained PCB area, requiring minimal external components and ultra-low quiescent current during sleep. IC Role / Device Role / Timing Role: Integrated AFE and protection IC handling voltage, temperature, and current sensing while retaining SRAM contents via PBI backup capacitor. Use Value: Reduces bill-of-materials by eliminating discrete ADCs, protection FET drivers, and authentication ICs - shrinking solution footprint by >40%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar gas gauge and protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ28Z620 | Supports up to 3-series cells and adds enhanced security (AES-128), but requires larger 16-pin VSON package and higher minimum VCC (3.0 V). | Targeted at higher-voltage medical or industrial packs where 3S topology and stronger encryption are mandatory. | Select BQ28Z620 only when 3-cell support or AES-128 is required; BQ28Z610 remains optimal for cost-sensitive 1S–2S consumer audio/tablet designs. |
| BQ28Z610EVM-692 | Not a direct replacement - evaluation module with preloaded firmware, onboard sensors, and USB interface for rapid prototyping. | Used exclusively for development and validation; not suitable for production end-equipment due to form factor and component count. | Use BQ28Z610EVM-692 to verify firmware behavior and protection thresholds before committing to BQ28Z610 in layout; never substitute in final BOM. |
Compared with BQ28Z620 and BQ28Z610EVM-692, the BQ28Z610 offers the optimal balance of 1S–2S flexibility, minimal external components, and Windows BTP compatibility - making it the preferred choice for volume production in space-constrained portable electronics.
Availability
BQ28Z610 is available at Aetrix Electronics and suitable for tablet computing, wireless Bluetooth speakers, and portable health monitors requiring stable component supply, long-term lifecycle support, and traceable sourcing for medical and consumer certifications.
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 innovation.
The BQ28Z610 belongs to TI's Impedance Track™ gas gauge product line, designed specifically for high-accuracy, autonomous, and secure battery monitoring in space-constrained portable electronics.
FAQ
What is the primary function of the BQ28Z610 in a battery pack?
The BQ28Z610 serves as an integrated gas gauge and protection IC for 1- to 2-cell Li-ion/Li-polymer battery packs. It performs high-accuracy state-of-charge estimation using Impedance Track™ algorithm, autonomously controls charging via Master Mode I²C, executes cell balancing, and enforces programmable voltage, current, and temperature protections - all within a single VSON-12 package.
Does the BQ28Z610 support Windows Battery Trip Point (BTP) functionality?
Yes, the BQ28Z610 supports Battery Trip Point (BTP) functionality through its TS1 pin, which can be configured as a BTP output for Windows OS integration. This capability, combined with its SHA-1 authentication responder, enables secure, compliant battery authentication and thermal trip signaling in Windows-certified devices.
What is the minimum current sense resistor value supported by the BQ28Z610?
The BQ28Z610 supports current sense resistors as low as 1 mΩ, enabled by its ultra-low-input-offset coulomb counter (<1 µV typical). This allows accurate 1-mA current measurement resolution - critical for low-power wearable and health-monitoring applications where minimal voltage drop across the shunt is essential.
How does the BQ28Z610 maintain I²C communication during fault conditions?
The BQ28Z610 maintains I²C communication during fault conditions using its high-side N-CH FET drive outputs (CHG and DSG). When discharge or charge faults occur, these drivers keep the device powered from the pack side, ensuring SCL/SDA remain active - unlike low-side solutions that lose bus connectivity upon FET shutdown.
Is the BQ28Z610 pin-compatible with other members of the BQ28Zxx family?
No, the BQ28Z610 is not pin-compatible with other BQ28Zxx variants such as the BQ28Z620, which uses a 16-pin VSON package. The BQ28Z610's 12-pin DRZ package has unique pin assignments (e.g., dedicated PBI, VC1/VC2 cell sense, and PACK inputs) optimized for 1S–2S topologies - requiring distinct PCB layout and schematic integration.
BQ28Z610DRZT 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)
BQ28Z610DRZT FAQ
1.How can I place an order for BQ28Z610DRZT through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ28Z610DRZT 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 BQ28Z610DRZT reliable?
The price and inventory of BQ28Z610DRZT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ28Z610DRZT is usually 5 days.
3.What payment methods are accepted for BQ28Z610DRZT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ28Z610DRZT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ28Z610DRZT?
BQ28Z610DRZT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ28Z610DRZT 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 BQ28Z610DRZT?
For technical support, including BQ28Z610DRZT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ28Z610DRZT requirements.
6.How does Aetrix verify that BQ28Z610DRZT is sourced from the original manufacturer or authorized distributors?
All BQ28Z610DRZT 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 BQ28Z610DRZT meets industry standards.
7.What is the process for return or replacement of BQ28Z610DRZT?
All BQ28Z610DRZT units undergo pre-shipment inspection (PSI). If there is an issue with BQ28Z610DRZT, 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 BQ28Z610DRZT part is unused and in its original packaging.
Return procedure for BQ28Z610DRZT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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