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Texas Instruments BQ27411DRZT-G1C
- Part No.:
- BQ27411DRZT-G1C
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 12-VFDFN Exposed Pad
- Datasheet:
-
BQ27411DRZT-G1C.pdf
- Description:
- IC FUEL GAUGE LI-ION 1CELL 12SON
- Quantity:
- Payment:
- Shipping:
Inventory:525
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Product details
Overview
BQ27411DRZT-G1C from Texas Instruments is a single-cell Li-ion battery fuel gauge IC designed for integration inside battery packs. It implements Impedance Track™ technology, uses a 10 mΩ shunt resistor for current sensing, delivers 1.8 V LDO output, supports 400-kHz I²C interface, and reports state-of-charge (%), remaining capacity (mAh), and voltage (mV) in smartphones and portable electronics.
For engineers reviewing the BQ27411DRZT-G1C datasheet, BQ27411DRZT-G1C pinout, BQ27411DRZT-G1C application, or BQ27411DRZT-G1C equivalent, key selection criteria include OTP-configurable chemistry support (LiCoO₂, 4.35 V max), integrated die temperature sensor, coulomb counter resolution (16-bit), low-power sleep mode (21 µA), and VSON-12 package compatibility with space-constrained battery pack layouts.
Technical Context
The BQ27411DRZT-G1C operates as a self-contained fuel gauge with no host initialization required, leveraging One-Time Programmable (OTP) memory to store battery-specific parameters. Its Impedance Track™ algorithm continuously models cell impedance using voltage, current, and temperature inputs to estimate state-of-charge and state-of-health across aging, temperature, and load variations.
It integrates a 16-bit integrating ADC for coulomb counting, a 15-bit ADC for voltage measurement, and an internal temperature sensor - all powered directly from the battery via an on-chip 1.8 V LDO regulator. Communication occurs exclusively over a 400-kHz I²C bus with fixed 7-bit address 0x55 (0xAA/0xAB), supporting standard and extended command sets for real-time telemetry and configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Battery Type | Single-cell LiCoO₂, 4.35 V maximum charge voltage - defines compatible battery chemistry and charging voltage ceiling |
| Sense Resistor | 10 mΩ ±1% external shunt - enables high-accuracy current measurement with minimal power loss |
| I²C Interface | 400 kHz Fast Mode - supports high-speed telemetry updates without requiring system clock synchronization |
| Coulomb Counter | 16-bit integrating ADC - provides precise accumulated charge tracking with <±0.5% current accuracy over –40°C to 85°C |
| LDO Output | 1.8 V ±3%, 0.47 µF decoupling - powers internal circuitry and eliminates need for external bias supply |
| Operating Temp | –40°C to +85°C - ensures reliable operation in consumer handheld and industrial portable environments |
| Power Modes | NORMAL (93 µA), SLEEP (21 µA), HIBERNATE (9 µA), SHUTDOWN (0.6 µA) - enables adaptive power management per system activity |
Pinout & Package
Package: VSON-12 (2.50 mm × 4.00 mm, 0.5 mm pitch), wettable flank, RoHS-compliant - optimized for automated optical inspection and high-density battery pack PCB assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SDA | I²C data line (open-drain) | Bi-directional serial communication; requires external 5–10 kΩ pull-up to VPU (1.62–3.6 V) |
| 2 - SCL | I²C clock line (open-drain) | Master-generated timing signal; same pull-up requirement as SDA |
| 3 - VSS | Ground reference | Primary return path for analog and digital circuits; must be low-impedance connection to pack negative |
| 5 - VDD | 1.8 V LDO output | Internal regulator output; decoupled with 0.47 µF ceramic capacitor to VSS - not for powering external circuitry |
| 6 - BAT | Battery input & ADC reference | Connects to PACK+; supplies LDO input and serves as voltage measurement reference point |
| 7 - SRN | Coulomb counter negative input | Low-side current sense terminal; paired with SRP across 10 mΩ shunt to measure discharge/charge current |
| 8 - SRP | Coulomb counter positive input | High-side current sense terminal; connects to BAT (CELLP) for standard configuration |
| 10 - TEST | Digital factory test input | Must be pulled low (1.0 MΩ pulldown) for normal operation; floating condition may cause malfunction |
| 12 - PROG | OTP programming voltage input | Accepts 7.4 V typical during factory configuration; 1.0 MΩ pulldown prevents floating and reduces leakage |
Key Features
| Feature | Design Value |
|---|---|
| Impedance Track™ algorithm | Delivers <±2% state-of-charge accuracy across battery life by modeling impedance changes due to aging, temperature, and rate effects |
| One-Time Programmable (OTP) memory | Stores calibrated chemistry ID (CHEM_ID = 0x0354), data memory code (DM_CODE = 0xA0), and firmware version (1.09) - eliminates runtime configuration overhead |
| Integrated die temperature sensor | Enables autonomous thermal compensation of SOC and SOH estimates without external thermistor or host reporting |
| Low-value shunt support | 10 mΩ sense resistor minimizes power dissipation (<10 mW at 1 A) while maintaining >16-bit coulomb counting resolution |
| Auto-wake and auto-shutdown | UVLO thresholds (2.0 V rise / 1.95 V fall) enable autonomous LDO control - extends shelf life and simplifies host power sequencing |
Applications
| Smartphones | Tablets |
|---|---|
Use Scenario: Real-time battery level display and low-battery warning during active UI usage and background app synchronization. IC Role / Device Role / Timing Role: Primary fuel gauge residing inside removable or sealed battery pack; communicates SOC and remaining capacity via I²C every 1–5 seconds. Use Value: Enables accurate battery percentage reporting and predictive shutdown before unexpected power loss, improving user experience and device reliability. | Use Scenario: Multi-tasking with video playback, GPS navigation, and Bluetooth peripherals under varying ambient temperatures. IC Role / Device Role / Timing Role: Embedded battery monitor providing temperature-compensated SOC and state-of-health (SOH) metrics to OS power manager. Use Value: Supports adaptive power budgeting and battery health diagnostics over 300+ charge cycles, extending usable device lifetime. |
| Digital Cameras | Handheld Terminals |
Use Scenario: Burst-mode photo capture with flash, followed by image review and Wi-Fi upload - causing rapid current transients and thermal drift. IC Role / Device Role / Timing Role: High-fidelity coulomb counter and voltage tracker delivering filtered remaining capacity (RM) and unfiltered raw data (RMU) for host-side smoothing. Use Value: Maintains <±3% capacity error despite 0.5–2 A load steps and die temperature shifts up to 40°C, preventing premature "battery empty" alerts. | Use Scenario: Ruggedized logistics scanner operating in warehouses with wide temperature swings (–20°C to +60°C) and intermittent connectivity. IC Role / Device Role / Timing Role: Standalone fuel gauge supplying SOC, voltage, and internal temperature to embedded MCU over I²C during barcode scan events. Use Value: Eliminates need for host-based calibration or external sensors, reducing BOM cost and enabling drop-in replacement of legacy gauges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery fuel gauging applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ27421YZFT-G1 | Same VSON-12 package; adds SHA-1 authentication, enhanced security registers, and improved low-current accuracy below 10 mA | Required for designs needing cryptographic battery authentication or secure firmware update capability | Select when tamper resistance and OEM battery validation are mandatory |
| BQ27441YZFT-G1 | Higher-resolution 16-bit voltage ADC (vs. 15-bit), extended temperature range (–40°C to +95°C), and configurable I²C address (0x55 or 0x56) | Suitable for automotive accessory modules or industrial handhelds requiring wider thermal margin | Choose for elevated ambient operation or flexible I²C bus topology with multiple gauges |
Compared with BQ27411DRZT-G1C, BQ27421YZFT-G1 adds cryptographic security at the cost of slightly higher quiescent current (25 µA vs. 21 µA in SLEEP), while BQ27441YZFT-G1 trades OTP-only configuration for field-programmable flash and broader thermal spec - both retain identical Impedance Track™ core and pinout compatibility.
Availability
BQ27411DRZT-G1C is available at Aetrix Electronics and suitable for smartphones, tablets, and handheld terminals requiring stable component supply, long-term lifecycle support, and guaranteed authenticity for battery pack integration.
Supply support for BQ27411DRZT-G1C 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 expertise in battery management systems.
The BQ27411DRZT-G1C belongs to TI's bq27xxx fuel gauge product line, engineered specifically for cost-sensitive, space-constrained single-cell Li-ion battery packs in consumer electronics where accuracy, low power, and OTP simplicity are critical.
FAQ
What battery chemistry does the BQ27411DRZT-G1C support?
The BQ27411DRZT-G1C is configured for LiCoO₂ chemistry with a 4.35 V maximum charge voltage, confirmed by CHEM_ID = 0x0354 and DM_CODE = 0xA0 per its OTP memory. It is not preconfigured for LiFePO₄, NMC, or LTO chemistries - those require different part numbers (e.g., BQ27411DRZT-G1A/B) or custom OTP programming not supported by this variant.
Does the BQ27411DRZT-G1C require external calibration during system integration?
No, the BQ27411DRZT-G1C does not require external calibration. Its OTP memory contains factory-programmed parameters including battery chemistry ID, design capacity, and impedance characterization data. The BQ27411DRZT-G1C begins accurate fuel gauging immediately upon power-up, with no host-initiated learning cycle or runtime calibration needed.
What is the function of the PROG pin on the BQ27411DRZT-G1C?
The PROG pin on the BQ27411DRZT-G1C serves as the programming voltage input for One-Time Programmable (OTP) memory during factory configuration, accepting ~7.4 V. In normal operation, it must be pulled low via a 1.0 MΩ resistor to VSS to prevent floating and reduce leakage. Toggling PROG can also force exit from SHUTDOWN mode, enabling recovery from unintended low-power states.
Can the BQ27411DRZT-G1C operate without an external temperature sensor?
Yes, the BQ27411DRZT-G1C can operate without an external temperature sensor because it includes an integrated die temperature sensor. This sensor provides real-time thermal data for Impedance Track™ compensation, eliminating dependency on host-reported or thermistor-based measurements - though the host may optionally override it via the Temperature() command if higher-accuracy external sensing is available.
What I²C address does the BQ27411DRZT-G1C use, and is it configurable?
The BQ27411DRZT-G1C uses a fixed 7-bit I²C address of 0x55 (0xAA write / 0xAB read), which is hard-coded and not configurable. Unlike later-generation gauges (e.g., BQ27441), this variant lacks address-select pins or software-configurable addressing - ensuring deterministic bus behavior but requiring unique placement on shared I²C segments.
BQ27411DRZT-G1C 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:
- Battery Monitor
- Battery Chemistry:
- Lithium Ion
- Number of Cells:
- 1
- Fault Protection:
- -
- Interface:
- I2C
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-SON (2.5x4)
BQ27411DRZT-G1C FAQ
1.How can I place an order for BQ27411DRZT-G1C through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ27411DRZT-G1C 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 BQ27411DRZT-G1C reliable?
The price and inventory of BQ27411DRZT-G1C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ27411DRZT-G1C is usually 5 days.
3.What payment methods are accepted for BQ27411DRZT-G1C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ27411DRZT-G1C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ27411DRZT-G1C?
BQ27411DRZT-G1C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ27411DRZT-G1C 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 BQ27411DRZT-G1C?
For technical support, including BQ27411DRZT-G1C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ27411DRZT-G1C requirements.
6.How does Aetrix verify that BQ27411DRZT-G1C is sourced from the original manufacturer or authorized distributors?
All BQ27411DRZT-G1C 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 BQ27411DRZT-G1C meets industry standards.
7.What is the process for return or replacement of BQ27411DRZT-G1C?
All BQ27411DRZT-G1C units undergo pre-shipment inspection (PSI). If there is an issue with BQ27411DRZT-G1C, 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 BQ27411DRZT-G1C part is unused and in its original packaging.
Return procedure for BQ27411DRZT-G1C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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