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Texas Instruments BQ27411DRZR-G1C
- Part No.:
- BQ27411DRZR-G1C
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 12-VFDFN Exposed Pad
- Datasheet:
-
BQ27411DRZR-G1C.pdf
- Description:
- IC BATT FUEL GAUGE LICOO2 12SON
- Quantity:
- Payment:
- Shipping:
Inventory:2,187
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Product details
Overview
BQ27411DRZR-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, features an integrated 1.8-V LDO regulator, supports 400-kHz I²C interface, and includes on-die temperature sensing - enabling accurate state-of-charge (SOC) and remaining capacity reporting in portable electronics.
For engineers reviewing the BQ27411DRZR-G1C datasheet, BQ27411DRZR-G1C pinout, BQ27411DRZR-G1C application, or BQ27411DRZR-G1C equivalent, this page delivers verified technical context, real-world design meaning of key specs, validated pin functions, confirmed alternative options, and supply-ready availability details - all grounded in TI's SLUSBN7D production data sheet.
Technical Context
The BQ27411DRZR-G1C operates as a self-contained fuel gauge with OTP-programmable configuration stored in non-volatile memory, eliminating host initialization overhead. Its coulomb counter uses a 16-bit integrating ADC with ±25 mV input range across SRP/SRN pins and 1-second conversion time, while voltage and temperature are measured via separate 15-bit ADCs.
It supports three low-power modes - SLEEP (21 µA), HIBERNATE (9 µA), and SHUTDOWN (0.6 µA) - with automatic transitions triggered by load current thresholds. The I²C interface complies with fast-mode timing (400 kHz), requires ≥66 µs bus-free intervals between packets, and incorporates clock stretching up to 4 ms during data processing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Cell Chemistry | Optimized for LiCoO₂ with 4.35-V max charge voltage - defines OCV curve and aging model used by Impedance Track™ |
| Coulomb Counter ADC | 16-bit integrating ADC with 1-s conversion time and ±25 mV differential input range - enables precise current integration over discharge cycles |
| Voltage Measurement | 15-bit ADC measuring BAT pin (2.45–4.5 V range) - provides mV-resolution cell voltage for SOC and health estimation |
| I²C Interface Speed | 400-kHz fast-mode support with mandatory 66-µs bus-free interval - ensures reliable communication without command collision or watchdog timeout |
| Supply Current (SLEEP) | 21 µA typical - allows multi-week battery pack standby without significant self-discharge impact |
| Integrated LDO | 1.8-V output with 0.47-µF external capacitor - powers internal circuitry directly from battery, isolating gauge from system rail noise |
| Temperature Sensing | On-die sensor with ±5°C accuracy across –40°C to 85°C - eliminates need for external thermistor in space-constrained packs |
Pinout & Package
Package: 12-pin VSON (DRZ), 2.50 mm × 4.00 mm, wettable flank - optimized for automated optical inspection and high-density battery pack PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SDA) | I²C data line (open-drain) | Requires external 5–10 kΩ pull-up; 1.0 MΩ pulldown recommended if pull-up may be disconnected - prevents floating input and false wake events |
| 2 (SCL) | I²C clock line (open-drain) | Same termination rules as SDA; timing-critical for 400-kHz operation - must meet tw(H) ≥600 ns and t(BUF) ≥66 µs |
| 3 (VSS) | Ground reference | Primary return path for LDO, ADC, and coulomb counter - must be low-impedance connection to pack negative terminal |
| 5 (VDD) | LDO regulated output | 1.8-V supply for internal logic; decoupled with 0.47-µF ceramic cap - not intended to power external components |
| 6 (BAT) | Battery voltage input & LDO input | Connects to PACK+; supplies LDO and feeds voltage ADC - requires 1-µF ceramic capacitor to VSS placed near pin |
| 7 (SRN) | Coulomb counter low-side sense input | Differential input paired with SRP; accepts 10-mΩ shunt - enables low-side sensing when tied to PACKN |
| 8 (SRP) | Coulomb counter high-side sense input | Differential input paired with SRN; connects to BAT (CELLP) for high-side sensing - defines current direction polarity |
| 10 (TEST) | Factory test input | Must be pulled low (1.0 MΩ pulldown) for normal operation - floating state may cause undefined behavior or increased quiescent current |
| 12 (PROG) | OTP programming voltage input | 7.4-V typical for factory configuration; 1.0 MΩ pulldown prevents floating - toggling exits SHUTDOWN mode |
Key Features
| Feature | Design Value |
|---|---|
| Impedance Track™ algorithm | Delivers <±5% SOC error across temperature, aging, and rate variations - no host calibration required after OTP programming |
| One-Time Programmable (OTP) memory | Stores chemistry ID (0x0354), DM code (0xA0), and firmware version (0x0109) - eliminates field reprogramming risk and boot-time configuration delays |
| Low-value sense resistor support | 10 mΩ, 1% tolerance shunt enables <10 mV drop at 1 A - minimizes power loss and thermal drift in compact battery packs |
| Integrated die temperature sensor | Replaces external thermistor in most applications - reduces BOM count and layout area while maintaining ±5°C accuracy over full operating range |
| Multi-level power management | SLEEP (21 µA), HIBERNATE (9 µA), SHUTDOWN (0.6 µA) - extends shelf life and enables rapid wake-on-I²C activity without host intervention |
Applications
| Smartphones | Digital Cameras |
|---|---|
|
Use Scenario: Real-time battery level display during video recording and flash charging cycles. IC Role / Device Role / Timing Role: Fuel gauge IC performing continuous coulomb counting and voltage-based SOC smoothing. Use Value: Maintains ±5% SOC accuracy despite rapid load transients and temperature shifts - prevents unexpected shutdown during critical capture moments. |
Use Scenario: Accurate remaining shot count and low-battery warning during burst-mode photography. IC Role / Device Role / Timing Role: Standalone fuel gauge reporting RemainingCapacity() and StateOfHealth() via I²C every 500 ms. Use Value: Leverages 16-bit coulomb counter resolution and 1-s integration time to resolve small-capacity changes between shots - improves user confidence in battery life estimates. |
| Handheld Terminals | MP3 Players |
|
Use Scenario: Multi-shift operation with intermittent scanning and wireless communication. IC Role / Device Role / Timing Role: Battery monitor managing SLEEP-to-NORMAL transitions based on host wake signals and load detection. Use Value: Achieves 9 µA HIBERNATE current - extends idle battery life to >6 months without recalibration or manual reset. |
Use Scenario: Portable audio playback with variable volume and Bluetooth streaming. IC Role / Device Role / Timing Role: Integrated fuel gauge providing StateOfCharge() and AverageCurrent() to optimize UI battery icon updates. Use Value: Uses on-die temperature sensor instead of external NTC - reduces component count by one and eliminates board space for thermistor routing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery fuel gauging applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ27421-G1A | Same 12-pin VSON package; adds SHA-1 authentication and enhanced security registers - firmware version 0x010A, CHEM_ID 0x0128 | Designed for systems requiring secure battery authentication (e.g., branded accessories); lacks 4.35-V chemistry support | Select BQ27421-G1A only if cryptographic validation of battery identity is required; otherwise BQ27411DRZR-G1C offers lower cost and matched 4.35-V LiCoO₂ optimization. |
| BQ27441-G1A | Includes integrated protection FET drivers and overvoltage/overcurrent fault reporting - same OTP structure but extended command set (e.g., PROTECT()) | Targeted at battery packs needing embedded protection logic alongside fuel gauging - increases gate drive complexity and BOM | Choose BQ27441-G1A only when replacing discrete protection ICs is justified; BQ27411DRZR-G1C remains optimal for pure gauging in cost- and space-sensitive designs. |
Compared with BQ27421-G1A and BQ27441-G1A, the BQ27411DRZR-G1C delivers focused, low-cost fuel gauging for 4.35-V LiCoO₂ cells without added security or protection overhead - making it ideal for consumer electronics where bill-of-materials simplicity and proven Impedance Track™ accuracy are primary selection criteria.
Availability
BQ27411DRZR-G1C is available at Aetrix Electronics and suitable for smartphones, digital cameras, and handheld terminals requiring stable component supply, long-lifecycle support, and consistent OTP configuration across production batches.
Supply support for BQ27411DRZR-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 company specializing in analog and embedded processing technologies, with leadership in power management, signal chain, and battery management solutions.
The BQ27411DRZR-G1C belongs to TI's bq27xxx fuel gauge product line, engineered specifically for space-constrained, single-cell Li-ion battery packs in portable electronics - emphasizing accuracy, low quiescent current, and factory-programmable configuration.
FAQ
What battery chemistry does the BQ27411DRZR-G1C support?
The BQ27411DRZR-G1C is configured for LiCoO₂ cells with a 4.35-V maximum charge voltage, identified by CHEM_ID 0x0354 per the datasheet. This specific tuning enables accurate OCV-based state-of-charge estimation and aging compensation across the higher voltage range - distinct from 4.2-V or 4.3-V variants like the G1A or G1B versions.
How is the BQ27411DRZR-G1C powered in a battery pack?
The BQ27411DRZR-G1C draws power directly from the battery via the BAT pin and regulates it internally using a dedicated 1.8-V LDO. The VDD pin outputs this regulated voltage for internal circuitry and requires a 0.47-µF ceramic capacitor to VSS. No external supply rail is needed - simplifying pack design and improving noise immunity.
What is the purpose of the PROG pin on the BQ27411DRZR-G1C?
The PROG pin on the BQ27411DRZR-G1C serves two roles: (1) it accepts 7.4-V programming voltage during factory OTP configuration, and (2) toggling it wakes the device from SHUTDOWN mode. A 1.0-MΩ pulldown resistor to VSS is required to prevent floating - ensuring predictable power-state transitions and avoiding unintended shutdown recovery.
Does the BQ27411DRZR-G1C require an external temperature sensor?
No, the BQ27411DRZR-G1C includes an integrated die temperature sensor with ±5°C accuracy from –40°C to 85°C, eliminating the need for an external thermistor in most applications. Host-reported temperature remains supported via the Temperature() command, but on-die sensing reduces BOM count and layout complexity for standard portable use cases.
What I²C timing requirements must be met for reliable BQ27411DRZR-G1C communication?
For reliable operation at 400 kHz, the BQ27411DRZR-G1C requires ≥66 µs of bus-free time (tBUF) between all I²C packets and mandates individual 1-byte writes when fSCL > 100 kHz. Clock stretching up to 4 ms may occur during NORMAL mode, and the device enters SLEEP mode if SDA/SCL remain low for 2 seconds - all timing constraints are defined in Section 7.10 of SLUSBN7D.
BQ27411DRZR-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)
BQ27411DRZR-G1C FAQ
1.How can I place an order for BQ27411DRZR-G1C through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ27411DRZR-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 BQ27411DRZR-G1C reliable?
The price and inventory of BQ27411DRZR-G1C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ27411DRZR-G1C is usually 5 days.
3.What payment methods are accepted for BQ27411DRZR-G1C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ27411DRZR-G1C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ27411DRZR-G1C?
BQ27411DRZR-G1C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ27411DRZR-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 BQ27411DRZR-G1C?
For technical support, including BQ27411DRZR-G1C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ27411DRZR-G1C requirements.
6.How does Aetrix verify that BQ27411DRZR-G1C is sourced from the original manufacturer or authorized distributors?
All BQ27411DRZR-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 BQ27411DRZR-G1C meets industry standards.
7.What is the process for return or replacement of BQ27411DRZR-G1C?
All BQ27411DRZR-G1C units undergo pre-shipment inspection (PSI). If there is an issue with BQ27411DRZR-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 BQ27411DRZR-G1C part is unused and in its original packaging.
Return procedure for BQ27411DRZR-G1C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BQ27411DRZR-G1C Tags
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