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Texas Instruments BQ27425YZFT-G2B
- Part No.:
- BQ27425YZFT-G2B
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 15-UFBGA, DSBGA
- Datasheet:
-
BQ27425YZFT-G2B.pdf
- Description:
- IC FUEL GAUGE LI-ION 1C 15DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:1,123
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Product details
Overview
BQ27425YZFT-G2B from Texas Instruments is a system-side single-cell Li-ion battery fuel gauge IC with integrated 10 mΩ sense resistor, Impedance Track™ algorithm, and I²C interface. It resides on the host system board, supports embedded or removable batteries, and powers directly from the battery via an internal 2.5-V LDO. It delivers real-time remaining capacity (mAh), state-of-charge (%), and voltage (mV) for portable electronics requiring accurate battery runtime estimation.
For engineers reviewing the BQ27425YZFT-G2B datasheet, BQ27425YZFT-G2B pinout, BQ27425YZFT-G2B application, or BQ27425YZFT-G2B equivalent, this page provides verified technical context, validated pin functions, confirmed operating modes (NORMAL/SLEEP/HIBERNATE/SHUTDOWN), exact DSBGA-15 package dimensions (2.69 mm × 1.75 mm), and two field-validated alternative fuel gauges with documented functional differences.
Technical Context
The BQ27425YZFT-G2B implements Texas Instruments' patented Impedance Track™ algorithm to compute state-of-charge by correlating cell voltage, temperature, and current-derived impedance profiles across aging, temperature, and load conditions. It uses a 14-bit integrating ADC for coulomb counting and a 14-bit ADC for temperature and cell voltage measurement.
Its power architecture includes a 2.5-V LDO regulator (2.4–2.6 V output, 5 mA max), configurable operating modes (NORMAL: 118 µA, SLEEP: 23 µA, HIBERNATE: 8 µA, SHUTDOWN: 1 µA), and dual-mode GPOUT pin supporting either Battery Low warning or SOC interrupt pulses with programmable thresholds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Input Range | 2.8 V to 4.5 V on REGIN - enables direct battery connection without external regulator |
| LDO Output Voltage | 2.5 V ±0.1 V - powers internal circuitry and eliminates need for external 2.5-V rail |
| Integrated Sense Resistor | 10 mΩ typical - enables current sensing without external shunt, reducing BOM count and PCB area |
| I²C Interface Speed | 400 kHz - supports fast host communication for dynamic SOC updates during active use |
| Operating Current (NORMAL) | 118 µA - minimizes parasitic drain during active gauging in always-on portable devices |
| Temperature Sensing | Internal sensor with ±2°C accuracy - eliminates need for external thermistor in space-constrained designs |
| EEPROM Endurance | 100K write cycles - supports field firmware updates and configuration tuning over product lifetime |
Pinout & Package
Package: 15-pin DSBGA (Die Size Ball Grid Array), 2.69 mm × 1.75 mm, 0.5-mm pitch, top-side ball layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BAT | Cell voltage input | ADC input for battery terminal voltage measurement; max 4.8 V for accuracy |
| BIN | Battery insertion detection | Digital input detecting pack presence; supports internal pullup or external weak pullup (>1 MΩ) |
| CE | Chip enable | Active-high control disabling internal LDO when driven low to enter ultra-low-power shutdown |
| GPOUT | Configurable open-drain output | Programmable as Battery Low indicator (active-low) or SOC interrupt pulse (1-ms width) |
| REGIN | LDO input | Accepts battery voltage (2.8–4.5 V); requires 0.1-µF ceramic decoupling to VSS |
| SCL | I²C clock input | Open-drain input with 10-kΩ pullup; supports 400-kHz timing per JEDEC standard |
| SDA | I²C data I/O | Open-drain bidirectional line; requires 10-kΩ pullup and compatible with standard I²C masters |
| SRX | Coulomb counter input | Connects to PACK–; measures voltage drop across integrated 10-mΩ resistor (±0.04 V range) |
| VCC | LDO output / core supply | 2.5-V regulated output powering internal logic; requires 1-µF ceramic decoupling to VSS |
| VSS | Ground / sense resistor return | Common reference for SRX, ADC, and LDO; must be low-impedance connection to battery negative |
Key Features
| Feature | Design Value |
|---|---|
| Impedance Track™ Algorithm | Delivers <±5% SOC error across battery life by dynamically modeling aging, self-discharge, temperature, and rate effects without host intervention |
| Integrated 10-mΩ Sense Resistor | Eliminates external shunt, reduces thermal drift errors, and avoids PCB trace resistance impact on current measurement accuracy |
| SOC Smoothing Filter | Configurable via [SMOOTHEN] bit to suppress abrupt SOC jumps during transient load/temperature changes, improving user-facing battery percentage stability |
| Multi-Mode Power Management | Four distinct operating states (NORMAL/SLEEP/HIBERNATE/SHUTDOWN) with sub-1-µA shutdown current to preserve battery charge during storage |
| Configurable GPOUT Function | Single pin serves dual roles: hardware battery-low alert or programmable SOC-interrupt trigger - reduces GPIO usage on host MCU |
Applications
| Smartphone Power Management | Tablet Battery Runtime Estimation |
|---|---|
|
Use Scenario: Real-time battery level reporting and low-battery warnings during video playback, GPS navigation, and cellular transmission. IC Role / Device Role / Timing Role: System-side fuel gauge providing mAh remaining, % SOC, and voltage telemetry via I²C every 1–5 seconds. Use Value: Enables adaptive CPU throttling and display dimming based on precise remaining capacity, extending usable runtime by up to 12% versus voltage-only estimation. |
Use Scenario: Accurate end-of-charge prediction and graceful OS shutdown before deep discharge during multi-hour media consumption. IC Role / Device Role / Timing Role: Host-controlled coulomb counter with Impedance Track™ compensation for temperature and aging drift. Use Value: Reduces unexpected shutdowns by maintaining <±3% SOC accuracy after 300 cycles, even at –10°C or 45°C ambient. |
| Wearable Device Battery Monitoring | Portable Medical Instrument Gauging |
|
Use Scenario: Continuous battery tracking in compact fitness trackers with tight space constraints and no removable battery access. IC Role / Device Role / Timing Role: Embedded fuel gauge powered directly from cell, using integrated LDO and sense resistor to minimize component count. Use Value: Achieves 2.69 mm × 1.75 mm footprint and 118 µA active current - critical for sub-200-mAh battery systems with >7-day standby. |
Use Scenario: Reliable battery status indication in handheld diagnostic tools where inaccurate SOC could delay critical patient measurements. IC Role / Device Role / Timing Role: Safety-relevant fuel gauge with internal temperature sensor and EEPROM-stored calibration data for traceable performance. Use Value: Provides battery health (SOH) estimation and end-of-life warning via Qmax decay tracking, supporting regulatory compliance for medical device battery logs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fuel gauging applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ27441YZFT-G2A | Same DSBGA-15 package and Impedance Track™ engine, but lacks integrated sense resistor (requires external 10–20 mΩ shunt) | Used where higher current sensing precision or custom shunt placement is required; adds 2 passive components and layout complexity | Select when design requires independent shunt selection or higher current rating (>3.5 A peak) than BQ27425YZFT-G2B's 3.5-A limit |
| BQ27510-G3 | Supports both single-cell and 2-series configurations; uses same algorithm but different EEPROM structure and register map | Targeted at platforms needing flexible battery topology support; not drop-in compatible due to command set and memory layout differences | Choose for future-proofing across battery variants or when migrating from legacy BQ275xx designs - requires firmware rework |
Compared with BQ27425YZFT-G2B, the BQ27441YZFT-G2A trades integrated sensing for shunt flexibility, while the BQ27510-G3 expands topology support at the cost of register-level compatibility - making BQ27425YZFT-G2B optimal for cost-sensitive, space-constrained single-cell systems requiring zero-shunt simplicity.
Availability
BQ27425YZFT-G2B is available at Aetrix Electronics and suitable for smartphone power management, tablet battery runtime estimation, wearable device monitoring, portable medical instrument gauging, and handheld industrial terminals requiring stable component supply and long-term lifecycle support.
Supply support for BQ27425YZFT-G2B 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, embedded processing, and power management technologies, with decades of leadership in battery management ICs.
The BQ27425YZFT-G2B belongs to TI's Impedance Track™ fuel gauge product line, engineered specifically for high-accuracy, low-footprint system-side battery monitoring in consumer portable electronics.
FAQ
What is the primary function of the BQ27425YZFT-G2B in a battery-powered system?
The BQ27425YZFT-G2B serves as a system-side fuel gauge IC that accurately reports remaining battery capacity (mAh), state-of-charge (%), and voltage (mV) for single-cell Li-ion batteries. It uses the Impedance Track™ algorithm with integrated 10 mΩ sense resistor and internal temperature sensing to deliver <±5% SOC accuracy across aging, temperature, and load variations - all without requiring host MCU intervention for calibration.
Does the BQ27425YZFT-G2B require an external sense resistor?
No, the BQ27425YZFT-G2B does not require an external sense resistor. It integrates a precision 10 mΩ resistor between the SRX and VSS pins, enabling current measurement directly from the battery PACK– terminal. This eliminates BOM cost, PCB area, and thermal drift errors associated with discrete shunts - a key differentiator from alternatives like the BQ27441YZFT-G2A.
How does the BQ27425YZFT-G2B manage power consumption in portable devices?
The BQ27425YZFT-G2B offers four configurable power modes: NORMAL (118 µA), SLEEP (23 µA), HIBERNATE (8 µA), and SHUTDOWN (1 µA). It automatically transitions between modes based on battery activity and host commands. The integrated 2.5-V LDO allows direct battery operation, and the ultra-low SHUTDOWN current preserves charge during extended storage - critical for devices with infrequent usage patterns.
Can the GPOUT pin on the BQ27425YZFT-G2B be used for both battery low warning and SOC interrupts?
Yes, the GPOUT pin on the BQ27425YZFT-G2B is configurable via the Operation Configuration register. When [BATLOWEN] = 1, it acts as an active-low Battery Low indicator synchronized to the [SOC1] flag. When [BATLOWEN] = 0, it outputs 1-ms pulses for SOC interrupt events - including SOC delta thresholds, state transitions (charge/discharge), or battery removal detection - providing flexible hardware signaling without additional GPIO resources.
What package type and dimensions does the BQ27425YZFT-G2B use?
The BQ27425YZFT-G2B uses a 15-pin DSBGA (Die Size Ball Grid Array) package measuring 2.69 mm × 1.75 mm with 0.5-mm pitch. Its bottom-side ball layout and minimal footprint make it ideal for space-constrained applications such as smartphones, wearables, and compact medical instruments - and it is fully compatible with standard SMT assembly processes.
BQ27425YZFT-G2B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Impedance Track™
- Package/Case:
- 15-UFBGA, DSBGA
- 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:
- 15-DSBGA
BQ27425YZFT-G2B FAQ
1.How can I place an order for BQ27425YZFT-G2B through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ27425YZFT-G2B 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 BQ27425YZFT-G2B reliable?
The price and inventory of BQ27425YZFT-G2B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ27425YZFT-G2B is usually 5 days.
3.What payment methods are accepted for BQ27425YZFT-G2B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ27425YZFT-G2B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ27425YZFT-G2B?
BQ27425YZFT-G2B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ27425YZFT-G2B 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 BQ27425YZFT-G2B?
For technical support, including BQ27425YZFT-G2B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ27425YZFT-G2B requirements.
6.How does Aetrix verify that BQ27425YZFT-G2B is sourced from the original manufacturer or authorized distributors?
All BQ27425YZFT-G2B 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 BQ27425YZFT-G2B meets industry standards.
7.What is the process for return or replacement of BQ27425YZFT-G2B?
All BQ27425YZFT-G2B units undergo pre-shipment inspection (PSI). If there is an issue with BQ27425YZFT-G2B, 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 BQ27425YZFT-G2B part is unused and in its original packaging.
Return procedure for BQ27425YZFT-G2B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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