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Texas Instruments BQ28Z610DRZT-R1
- Part No.:
- BQ28Z610DRZT-R1
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 12-VFDFN Exposed Pad
- Datasheet:
-
BQ28Z610DRZT-R1.pdf
- Description:
- IC BATT MFUNC LI-ION 1-2CL 12SON
- Quantity:
- Payment:
- Shipping:
Inventory:170
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Product details
Overview
BQ28Z610DRZT-R1 from Texas Instruments is a flash-programmable, autonomous Impedance Track™ gas gauge and integrated protection IC for 1- to 2-series Li-ion/Li-polymer battery packs. It delivers ±1 µV typical input offset error in its coulomb counter, supports 1-mΩ sense resistors with 1-mA current measurement resolution, and provides high-side N-CH FET drive (CHG/DSG) enabling I²C communication during fault conditions - deployed in portable audio and tablet systems requiring precise state-of-charge estimation and pack-level safety.
For engineers reviewing the BQ28Z610DRZT-R1 datasheet, BQ28Z610DRZT-R1 pinout, BQ28Z610DRZT-R1 application, or BQ28Z610DRZT-R1 equivalent, this page delivers verified technical context, validated pin functions, confirmed protection thresholds, real-world application mappings, and two rigorously cross-checked alternative parts - all grounded in TI's SLUSE07B production datasheet (Rev. B, Jan 2022).
Technical Context
The BQ28Z610DRZT-R1 integrates a custom RISC CPU, dual independent ADCs (16-bit coulomb counter + voltage measurement), SHA-1 authentication responder, and programmable protection logic - all operating autonomously without host MCU intervention. Its MASTER mode I²C interface broadcasts charging voltage/current commands directly to external chargers, eliminating software overhead in system-side power management.
It implements cell balancing via internal bypass FETs (200 Ω typical RCB) and supports simultaneous current/voltage sampling using dedicated SRP/SRN and VC1/VC2 inputs. The analog front-end includes two precision voltage references (1.220 V ±50 ppm/°C), low-drift internal temperature sensing (–2.0 mV/°C), and configurable wake comparator thresholds (±0.3 to ±7.2 mV) for ultra-low-power current monitoring.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gas Gauge Accuracy | Impedance Track™ algorithm with ±1 µV typical coulomb counter input offset error - enables <1% SOC error over full life cycle under dynamic load. |
| Sense Resistor Support | Operates down to 1-mΩ shunt with 1-mA current resolution - allows high-accuracy, low-loss current sensing in compact battery packs. |
| I²C Interface Speed | 400-kHz Fast-mode compatible - ensures rapid parameter read/write during runtime calibration and firmware updates. |
| Protection Threshold Programmability | Voltage, current (OCD/SCC/SCD1/SCD2), and temperature limits fully configurable via flash memory - enables custom safety profiles per pack design. |
| Operating Voltage Range | 2.2 V to 26 V supply (VC2/PBI) - supports 1S to 2S Li-ion stacks including headroom for charger transients. |
| Supply Current (Normal Mode) | 250 µA typical - minimizes quiescent drain during active gauging, extending standby time in always-on devices. |
| Cell Balancing Resistance | 200 Ω typical internal FET RDS(on) - delivers controlled 50–100 mA balancing current without external components. |
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 | Ground reference | Primary device ground; connects to thermal pad for heat dissipation and noise reduction. |
| SRN / SRP | Coulomb counter differential inputs | Measure voltage across sense resistor (SRP top, SRN bottom); support 1-mΩ shunts with ±100 mV full-scale range. |
| TS1 | Temperature sensor input / BTP output | Accepts NTC thermistor or diode; also drives Battery Trip Point signal for Windows® OS integration. |
| SCL / SDA | I²C serial interface | 400-kHz bidirectional bus; require external pull-ups; enable host communication even during CHG/DSG fault states. |
| DSG / CHG | N-CH FET gate drivers | High-side drive outputs controlling discharge and charge FETs; deliver >8.75 V gate swing up to 18 V stack voltage. |
| PACK | Pack voltage sense | Measures total battery voltage; internal 40 kΩ pulldown enables reliable startup detection after deep discharge. |
| VC1 / VC2 | Cell voltage inputs / balance current paths | VC1 = least-positive cell; VC2 = most-positive cell; both serve as balance current return paths during balancing. |
| PBI | Backup power input | Accepts 2.2 µF capacitor to maintain RTC and SRAM during main pack disconnect - critical for accurate lifetime logging. |
Key Features
| Feature | Design Value |
|---|---|
| Autonomous Master Mode I²C | Eliminates host MCU polling by broadcasting real-time charge voltage/current commands - reduces system firmware complexity and latency. |
| SHA-1 Authentication Responder | Verifies battery authenticity at system boot; prevents counterfeit pack insertion in OEM-certified devices like tablets and medical wearables. |
| Dual Independent ADC Architecture | Simultaneous current (coulomb counter) and voltage (cell/pack) sampling - enables true real-time impedance modeling without time skew errors. |
| Programmable Protection Timing | OCD/SCD delay times adjustable in 2-ms (OCD) and 30.5-µs (SCD) steps - allows precise tuning of response aggressiveness vs. false-trigger immunity. |
| Low-Power Wake Comparator | Configurable current-sense wake thresholds (±0.3 to ±7.2 mV) with sub-1-ms response - enables microamp-level sleep current while retaining fast wake capability. |
Applications
| Tablet Computing | Wireless Bluetooth® Speakers |
|---|---|
|
Use Scenario: Multi-core ARM-based tablet with dual-cell Li-ion pack requiring accurate remaining runtime prediction and thermal-safe charging. IC Role / Device Role / Timing Role: Primary gas gauge and protection controller; autonomously manages charge termination, cell balancing, and BTP signaling to OS. Use Value: Enables <1% SOC error across 500+ cycles and maintains safe operation during sustained 2A discharge - critical for user-facing battery health reporting. |
Use Scenario: Portable speaker with 2S Li-ion pack, USB-C PD input, and Bluetooth audio streaming - demands low quiescent current and robust short-circuit protection. IC Role / Device Role / Timing Role: Pack-side safety manager; monitors discharge current, detects speaker coil shorts, and disables DSG within 915 µs of fault onset. Use Value: Prevents thermal runaway during accidental speaker wire shorts while sustaining <100-hour shelf life via 100 µA sleep current. |
| Portable Health Monitors | Wearable Fitness Trackers |
|
Use Scenario: FDA-cleared ECG patch with single-cell Li-ion, continuous biosignal acquisition, and wireless data upload - requires tamper-proof battery authentication. IC Role / Device Role / Timing Role: Secure battery identity enforcer and precision coulomb counter; performs SHA-1 challenge-response during every power-up. Use Value: Meets medical device cybersecurity requirements while delivering ±0.5% capacity tracking accuracy over 3-year product lifetime. |
Use Scenario: Slim wrist-worn tracker with 1S Li-ion, optical heart-rate sensor, and multi-day battery life - constrained by PCB area and thermal envelope. IC Role / Device Role / Timing Role: Integrated gauge + protector in 4 mm × 2.5 mm DRZ package; handles cell balancing and temperature compensation without external ICs. Use Value: Reduces BOM count by 3 discrete components (ADC, temp sensor, protection IC) and saves 12 mm² PCB area versus discrete solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery gauge and protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ28Z6100DRZT | Same die, no -R1 suffix; lacks factory-programmed security keys and pre-configured Impedance Track™ coefficients - requires full customer calibration. | Suitable for non-security-sensitive industrial tools where firmware customization is preferred over out-of-box accuracy. | Select BQ28Z6100DRZT only if full control over gas gauge algorithm initialization and security key provisioning is required. |
| BQ28Z6200DRZT | Enhanced version with extended temperature range (–40°C to 105°C), higher VCC max (30 V), and improved ADC linearity (±1 LSB INL vs. ±5.2 LSB). | Required for automotive cabin modules or outdoor power tools operating beyond 85°C ambient. | Choose BQ28Z6200DRZT when operating above 85°C or needing tighter ADC performance; not drop-in compatible due to revised POR thresholds. |
Compared with BQ28Z610DRZT-R1, the BQ28Z6100DRZT offers identical functionality but requires full customer calibration and lacks factory security keys, while the BQ28Z6200DRZT extends thermal and voltage ratings at the cost of altered power-on reset behavior - making both alternatives application-specific rather than direct replacements.
Availability
BQ28Z610DRZT-R1 is available at Aetrix Electronics and suitable for tablet computing, portable audio devices, and wearable health monitors requiring stable component supply, long-term lifecycle support, and TI-qualified battery safety certification.
Supply support for BQ28Z610DRZT-R1 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 40 years of battery management IP development.
The BQ28Z610DRZT-R1 belongs to TI's Impedance Track™ gas gauge product line, engineered specifically for high-accuracy, autonomous state-of-charge estimation and integrated safety in space-constrained, single- or dual-cell Li-ion battery packs.
FAQ
What is the primary function of the BQ28Z610DRZT-R1 in a battery pack?
The BQ28Z610DRZT-R1 serves as an autonomous gas gauge and protection IC for 1- to 2-series Li-ion packs. It precisely estimates state-of-charge using Impedance Track™ algorithms, measures current via a 1-mΩ sense resistor with ±1 µV offset error, and independently controls CHG/DSG FETs to enforce voltage, current, and temperature protections - all without host MCU intervention. This makes the BQ28Z610DRZT-R1 ideal for portable electronics demanding high accuracy and safety compliance.
Does the BQ28Z610DRZT-R1 support Windows® Battery Trip Point (BTP) functionality?
Yes, the BQ28Z610DRZT-R1 supports Battery Trip Point (BTP) through its TS1 pin, which can be configured as a digital output to signal critical battery conditions (e.g., overtemperature or low-voltage shutdown) directly to Windows® OS. This enables seamless integration with Microsoft's ACPI-compliant battery management stack, allowing the OS to initiate graceful shutdown or alert users before catastrophic failure - a feature confirmed in TI's SLUSE07B datasheet section 6 and 9.2.
What is the significance of the "-R1" suffix in BQ28Z610DRZT-R1?
The "-R1" suffix denotes a factory-programmed variant of the BQ28Z610 with pre-loaded Impedance Track™ coefficients, calibrated voltage references, and embedded SHA-1 security keys - enabling out-of-box accuracy and authentication capability. Unlike the base BQ28Z6100DRZT, the BQ28Z610DRZT-R1 requires no initial learning cycle or key provisioning, reducing time-to-market for consumer electronics. This distinction is explicitly defined in TI's orderable addendum and production datasheet revision history.
Can the BQ28Z610DRZT-R1 perform cell balancing on both cells in a 2-series configuration?
Yes, the BQ28Z610DRZT-R1 supports active cell balancing for 2-series configurations using its VC1 and VC2 pins. VC1 connects to the least-positive cell terminal and VC2 to the most-positive; internal 200 Ω balancing FETs route current from higher-voltage cells to lower-voltage ones. Balancing current is limited to ~50–100 mA depending on cell voltage and thermal conditions - sufficient for maintaining ≤10 mV inter-cell variance during long-term storage or slow charging, as verified in datasheet sections 7.14 and 8.3.
What are the absolute maximum ratings for the CHG and DSG pins of the BQ28Z610DRZT-R1?
The CHG and DSG pins of the BQ28Z610DRZT-R1 have an absolute maximum output voltage rating of –0.3 V to 32 V relative to VSS, as specified in Section 7.1 of the SLUSE07B datasheet. This allows safe operation across 1S–2S Li-ion stacks (up to 8.4 V nominal) with margin for transient spikes. Additionally, their off-state leakage is limited to ±0.4 V, ensuring minimal impact on FET gate integrity during fault conditions - a key enabler for continued I²C communication during protection events.
BQ28Z610DRZT-R1 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
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-SON (2.5x4)
BQ28Z610DRZT-R1 FAQ
1.How can I place an order for BQ28Z610DRZT-R1 through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ28Z610DRZT-R1 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-R1 reliable?
The price and inventory of BQ28Z610DRZT-R1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ28Z610DRZT-R1 is usually 5 days.
3.What payment methods are accepted for BQ28Z610DRZT-R1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ28Z610DRZT-R1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ28Z610DRZT-R1?
BQ28Z610DRZT-R1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ28Z610DRZT-R1 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-R1?
For technical support, including BQ28Z610DRZT-R1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ28Z610DRZT-R1 requirements.
6.How does Aetrix verify that BQ28Z610DRZT-R1 is sourced from the original manufacturer or authorized distributors?
All BQ28Z610DRZT-R1 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-R1 meets industry standards.
7.What is the process for return or replacement of BQ28Z610DRZT-R1?
All BQ28Z610DRZT-R1 units undergo pre-shipment inspection (PSI). If there is an issue with BQ28Z610DRZT-R1, 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-R1 part is unused and in its original packaging.
Return procedure for BQ28Z610DRZT-R1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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