My Inquiry
My Account
Texas Instruments BQ27411DRZT-G1A
- Part No.:
- BQ27411DRZT-G1A
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 12-VFDFN Exposed Pad
- Datasheet:
-
BQ27411DRZT-G1A.pdf
- Description:
- IC FUEL GAUGE LI-ION 1CELL 12SON
- Quantity:
- Payment:
- Shipping:
Inventory:570
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BQ27411DRZT-G1A 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 BQ27411DRZT-G1A datasheet, BQ27411DRZT-G1A pinout, BQ27411DRZT-G1A application, or BQ27411DRZT-G1A equivalent, this page delivers verified technical context, real-world design meaning of key specs, validated pin functions, confirmed alternative parts with functional distinctions, and supply-chain support details specific to OEM and embedded design workflows.
Technical Context
The BQ27411DRZT-G1A operates as a system-side fuel gauge controller residing directly in the battery pack, eliminating host processor dependency for initialization via OTP NVM. Its coulomb counting relies on differential voltage measurement across SRP/SRN pins with ±25 mV input range and 16-bit effective resolution per conversion.
It integrates a 15-bit ADC for cell voltage (2.45–4.5 V range) and die temperature, supports wake-up from sleep mode via I²C activity or BAT voltage threshold crossing (UVLOIT+ = 2 V), and delivers gas-gauge outputs-including SOC (%), remaining capacity (mAh), full charge capacity (mAh), and state of health (SOH)-via standard and extended I²C commands at up to 400 kHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Battery Type | Single-cell LiCoO₂ (4.2 V max charge; CHEM_ID = 0x0128) |
| I²C Interface Speed | Up to 400 kHz Fast Mode - enables rapid host polling without bus contention in power-constrained systems |
| Coulomb Counter Resolution | 16-bit effective resolution - provides high-precision current integration over time for accurate capacity tracking |
| Voltage Measurement Range | 2.45 V to 4.5 V with 15-bit ADC - covers full operational window of Li-ion cells including discharge cutoff and charge termination |
| Supply Current (Normal Mode) | 93 µA typical - minimizes parasitic drain during active monitoring in always-on battery management |
| Operating Temperature | –40°C to +85°C - supports reliable operation in consumer handhelds and industrial portable equipment |
| LDO Output | 1.8 V regulated output (VDD), decoupled by 0.47 µF capacitor - powers internal circuitry independently of host rail |
Pinout & Package
Package: 12-pin VSON (DRZ), 2.50 mm × 4.00 mm, wettable flank - optimized for compact battery pack PCB layouts and automated optical inspection (AOI).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SDA) | I²C data line (open-drain) | Host communication interface; requires external 5–10 kΩ pull-up; 1.0 MΩ pulldown recommended to prevent floating during disconnect |
| 2 (SCL) | I²C clock line (open-drain) | Synchronizes command/data transfers; same pull-up/pulldown requirements as SDA |
| 3 (VSS) | Ground reference | Primary return path for all analog and digital circuits; must be low-impedance connection to pack negative terminal |
| 5 (VDD) | LDO regulated output | 1.8-V supply for internal logic; not intended to power external components; requires 0.47 µF ceramic decoupling to VSS |
| 6 (BAT) | Battery voltage input & LDO input | Connects to PACK+; supplies LDO and feeds voltage ADC; requires 1 µF ceramic capacitor to VSS near pin |
| 7 (SRN) | Coulomb counter low-side sense input | Differential input paired with SRP; accepts 10 mΩ shunt; supports low-side sensing when tied to PACKN |
| 8 (SRP) | Coulomb counter high-side sense input | Differential input paired with SRN; connects to BAT/CELLP in high-side config or PACKN in low-side config |
| 10 (TEST) | Factory test input | Must be pulled low (1.0 MΩ pulldown) for normal operation; unused in end application |
| 12 (PROG) | OTP programming voltage input | Accepts 7.4 V for one-time configuration; 1.0 MΩ pulldown prevents floating; toggling exits SHUTDOWN mode |
Key Features
| Feature | Design Value |
|---|---|
| Impedance Track™ algorithm | Delivers <±2% SOC accuracy across aging, temperature, and load variations - no runtime calibration required |
| One-Time Programmable (OTP) NVM | Stores chemistry ID, design capacity, and custom parameters permanently - eliminates boot-time host download |
| Integrated die temperature sensor | Enables autonomous thermal compensation of SOC and aging models - avoids need for external thermistor routing |
| Low-power operating modes | Hibernate mode draws only 9 µA - extends shelf life and reduces self-discharge impact during storage |
| 400-kHz I²C with clock stretching | Supports up to 4 ms clock stretch - accommodates internal processing latency without bus timeout errors |
Applications
| Smartphones | Tablets |
|---|---|
|
Use Scenario: Real-time battery level display and low-battery warning during mixed-use workloads (video playback, web browsing, GPS). IC Role / Device Role / Timing Role: Primary fuel gauge residing in removable or sealed battery pack; reports smoothed SOC and remaining capacity every 5–10 seconds via I²C. Use Value: Enables precise shutdown prediction and adaptive power management without host CPU overhead or external sensors. |
Use Scenario: Multi-hour video streaming with background sync and push notifications under varying ambient temperatures. IC Role / Device Role / Timing Role: Embedded pack-side gauging IC; autonomously compensates for self-discharge and impedance drift using Impedance Track™. Use Value: Maintains ±2% SOC accuracy over 300+ cycles and across –10°C to +45°C - critical for user-facing battery indicators. |
| Digital Cameras | Handheld Terminals |
|
Use Scenario: Burst-mode photo capture with flash, followed by immediate image review and Wi-Fi upload. IC Role / Device Role / Timing Role: High-dynamic-range coulomb counter; measures transient 2-A discharge peaks and microamp-level standby currents. Use Value: Delivers accurate remaining shot count and "time until empty" estimation despite highly variable load profiles. |
Use Scenario: Ruggedized inventory scanner operating 12+ hours per charge in warehouse environments with frequent cold starts. IC Role / Device Role / Timing Role: Battery-integrated fuel gauge with OTP-configured LiCoO₂ profile; wakes on I²C request or voltage threshold crossing. Use Value: Eliminates host-initiated calibration routines and ensures consistent runtime reporting across temperature swings and battery aging. |
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 package and Impedance Track™ core, but adds SHA-1 authentication and enhanced security registers | Required where battery pack authentication or firmware integrity verification is mandated (e.g., branded accessories) | Select BQ27421-G1A only if cryptographic validation of pack identity or firmware is needed; otherwise BQ27411DRZT-G1A offers lower cost and identical gauging performance |
| BQ27220 | Legacy 10-pin SON; lacks OTP memory - requires host-based configuration and periodic parameter updates | Suitable for cost-sensitive designs with host processor resources available for runtime calibration and profile management | Choose BQ27220 only when design allows host-driven initialization and cannot accommodate OTP programming infrastructure; BQ27411DRZT-G1A reduces system software complexity |
Compared with BQ27421-G1A, the BQ27411DRZT-G1A omits security features to reduce bill-of-materials cost and simplify factory programming, while retaining identical fuel gauging accuracy and low-power behavior; versus BQ27220, it eliminates host dependency via OTP storage, improving robustness in field-deployed battery packs.
Availability
BQ27411DRZT-G1A is available at Aetrix Electronics and suitable for smartphones, tablets, and handheld terminals requiring stable component supply, long-term lifecycle support, and guaranteed traceability for battery safety compliance.
Supply support for BQ27411DRZT-G1A 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-G1A belongs to TI's bq27xxx fuel gauge product line, engineered specifically for space-constrained, single-cell Li-ion battery pack integration - prioritizing accuracy, autonomy, and minimal host interaction.
FAQ
What battery chemistries does the BQ27411DRZT-G1A support?
The BQ27411DRZT-G1A is factory-configured for LiCoO₂ chemistry with 4.2-V maximum charge voltage (CHEM_ID = 0x0128). It is not user-reprogrammable to other chemistries; alternate variants like BQ27411DRZT-G1B (4.3 V) or BQ27411DRZT-G1C (4.35 V) exist but require separate ordering. The BQ27411DRZT-G1A itself supports only the specified LiCoO₂ profile.
Does the BQ27411DRZT-G1A require external calibration during system integration?
No, the BQ27411DRZT-G1A does not require external calibration. Its Impedance Track™ algorithm and OTP-stored parameters enable out-of-box operation. All gauging parameters - including design capacity, resistance tables, and chemistry model - are programmed once at the battery pack manufacturer's facility using the PROG pin and I²C commands. Host systems read ready-to-use SOC and capacity values without calibration routines.
Can the BQ27411DRZT-G1A operate without an external sense resistor?
No, the BQ27411DRZT-G1A requires an external 10-mΩ, 1% tolerance sense resistor connected between SRP and SRN to perform coulomb counting. This resistor is mandatory for current measurement and remaining capacity calculation. Omitting it disables fuel gauging functionality entirely - voltage-only estimation is not supported by the BQ27411DRZT-G1A.
What is the purpose of the PROG pin on the BQ27411DRZT-G1A?
The PROG pin on the BQ27411DRZT-G1A serves two roles: (1) During manufacturing, it accepts 7.4 V to enable One-Time Programmable (OTP) memory writing for permanent configuration; (2) In end application, toggling PROG wakes the device from SHUTDOWN mode. A 1.0-MΩ pulldown resistor is required to prevent floating and ensure reliable operation - the BQ27411DRZT-G1A will not function correctly if PROG is left unconnected.
How does the BQ27411DRZT-G1A handle temperature measurement?
The BQ27411DRZT-G1A uses an integrated die temperature sensor for automatic thermal compensation of SOC and aging calculations. It can also accept host-reported temperature via I²C if higher accuracy or external thermal monitoring is preferred. The on-die sensor eliminates routing complexity and provides fast response to internal IC temperature changes - a key factor in maintaining gauging accuracy during dynamic load conditions.
BQ27411DRZT-G1A 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-G1A FAQ
1.How can I place an order for BQ27411DRZT-G1A through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ27411DRZT-G1A 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-G1A reliable?
The price and inventory of BQ27411DRZT-G1A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ27411DRZT-G1A is usually 5 days.
3.What payment methods are accepted for BQ27411DRZT-G1A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ27411DRZT-G1A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ27411DRZT-G1A?
BQ27411DRZT-G1A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ27411DRZT-G1A 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-G1A?
For technical support, including BQ27411DRZT-G1A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ27411DRZT-G1A requirements.
6.How does Aetrix verify that BQ27411DRZT-G1A is sourced from the original manufacturer or authorized distributors?
All BQ27411DRZT-G1A 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-G1A meets industry standards.
7.What is the process for return or replacement of BQ27411DRZT-G1A?
All BQ27411DRZT-G1A units undergo pre-shipment inspection (PSI). If there is an issue with BQ27411DRZT-G1A, 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-G1A part is unused and in its original packaging.
Return procedure for BQ27411DRZT-G1A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BQ27411DRZT-G1A Tags
-
BQ29700DSER
Texas Instruments
-
S-8241ABKMC-GBKT2G
ABLIC Inc.
-
S-8241ABPMC-GBPT2G
ABLIC Inc.
-
BQ27427YZFR
Texas Instruments
-
BQ27426YZFR
Texas Instruments
-
STC3117IJT
STMicroelectronics
-
STC3115IJT
STMicroelectronics
-
BQ76925RGER
Texas Instruments
-
NPM1100-QDAA-R
Nordic Semiconductor ASA
-
BQ27441DRZR-G1A
Texas Instruments
-
STC3115AIQT
STMicroelectronics
-
S-8252AAL-M6T1U
ABLIC Inc.
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
