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Texas Instruments BQ27425YZFT-G2A
- Part No.:
- BQ27425YZFT-G2A
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 15-UFBGA, DSBGA
- Datasheet:
-
BQ27425YZFT-G2A.pdf
- Description:
- IC FUEL GAUGE LI-ION 1CL 15DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:4,497
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Product details
Overview
BQ27425YZFT-G2A from Texas Instruments is a system-side single-cell Li-ion fuel gauge IC with integrated 10 mΩ sense resistor, Impedance Track™ algorithm, I²C interface (400 kHz), and on-chip LDO regulator (2.5 V). It resides on the host PCB, measures voltage, current, and temperature to report remaining capacity (mAh), state-of-charge (%), and battery health-used in smartphones and portable media devices.
For engineers reviewing the BQ27425YZFT-G2A datasheet, BQ27425YZFT-G2A pinout, BQ27425YZFT-G2A application, or BQ27425YZFT-G2A equivalent, key selection criteria include integrated sensing, low-power operating modes (SLEEP: 23 µA, HIBERNATE: 8 µA), battery insertion detection via BIN, and configurable GPOUT for SOC interrupt or battery-low warning.
Technical Context
The BQ27425YZFT-G2A implements Texas Instruments' patented Impedance Track™ algorithm to model cell impedance dynamically using real-time voltage, current, and temperature measurements. It integrates a 14–15-bit coulomb counter ADC (SRX input), 14–15-bit cell voltage/temperature ADC (BAT input), and internal temperature sensor with ±2 mV/°C gain.
Its power architecture includes a 2.5-V LDO (2.4–2.6 V output) powered from REGIN, supporting operation across 2.8–4.5 V input range. The device transitions autonomously between INITIALIZATION, NORMAL, SLEEP, HIBERNATE, and SHUTDOWN modes based on current thresholds and I/O events-including battery insertion detection via BIN pin and configurable wake-up triggers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Cell Support | Single-series Li-ion (LiCoO₂ or LiMn₂O₄); CHEM_ID = 0x128 per datasheet |
| Integrated Sense Resistor | 10 mΩ typical; enables direct SRX-to-VSS current sensing without external shunt |
| I²C Interface | 400 kHz standard mode; open-drain SDA/SCL with 10 kΩ pullup support |
| Operating Current | NORMAL mode: 118 µA; SLEEP: 23 µA; HIBERNATE: 8 µA; SHUTDOWN: 1 µA |
| ADC Resolution | Coulomb counter (SRX): 14–15 bits; cell voltage/temp (BAT): 14–15 bits |
| LDO Output | 2.5 V ±0.1 V (2.4–2.6 V), supports up to 5 mA load from 2.7–4.5 V REGIN |
| Temperature Sensing | On-die sensor (±2 mV/°C gain) or host-provided value; reported error ≤ ±5°C |
Pinout & Package
Package: 15-pin DSBGA (YZF), 2.69 mm × 1.75 mm, 0.5-mm pitch, bottom-side ball layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BAT | Cell voltage input | ADC input for battery voltage measurement; max 4.8 V for accuracy |
| BIN | Battery insertion detection | Logic input detecting pack insertion; supports internal/external pullup (1.8 MΩ typical) |
| CE | Chip enable | Drives LDO off when low; disables internal regulator and halts gauging |
| GPOUT | Configurable open-drain output | Selectable as Battery Low indicator (SOC1 flag) or SOC interrupt pulse (1 ms) |
| REGIN | LDO input | Accepts 2.8–4.5 V supply; decoupled with 0.1 µF ceramic to VSS |
| SCL / SDA | I²C interface | 400 kHz slave interface; SCL clock, SDA bidirectional data with 10 kΩ pullup |
| SRX | Coulomb counter input | Connects to PACK–; senses voltage drop across integrated 10 mΩ resistor |
| VCC | LDO output & core supply | 2.5 V regulated output; decoupled with 1 µF ceramic to VSS |
| VSS | Ground & sense resistor return | Common reference for SRX, ADC, and LDO; must be low-impedance path |
Key Features
| Feature | Design Value |
|---|---|
| Impedance Track™ algorithm | Real-time modeling of cell impedance, aging, self-discharge, and rate/temperature effects for ±5% SOC accuracy over life |
| Integrated 10 mΩ sense resistor | Eliminates external shunt, reduces BOM count and PCB area, and minimizes thermal drift impact |
| Configurable GPOUT function | Single pin supports either battery-low warning (level-triggered) or SOC-interrupt pulses (1-ms edge-triggered at user-defined % steps) |
| Battery insertion detection (BIN) | Detects pack presence via logic transition or weak pullup; initiates gauging only after valid insertion event |
| Multi-mode power management | Four low-power states (SLEEP/HIBERNATE/SHUTDOWN) with automatic entry/exit; <1 µA shutdown current preserves battery during storage |
Applications
| Smartphone Power Management | Tablet Battery Monitoring |
|---|---|
|
Use Scenario: Real-time battery state reporting during active screen use, cellular transmission, and background app activity. IC Role / Device Role / Timing Role: System-side fuel gauge providing mAh remaining, % SOC, and full-charge capacity under dynamic load and temperature shifts. Use Value: Enables accurate battery percentage display and low-battery warnings without requiring host CPU polling or external sensors. |
Use Scenario: Long-duration video playback with varying screen brightness and Wi-Fi usage across ambient temperatures. IC Role / Device Role / Timing Role: Measures cumulative charge/discharge via integrated SRX path and compensates for aging using Impedance Track™. Use Value: Maintains ±5% SOC accuracy over 300+ cycles by adapting to capacity loss and internal resistance increase. |
| Portable Media Player | Handheld Industrial Terminal |
|
Use Scenario: Intermittent audio playback with frequent sleep/wake cycles and infrequent charging. IC Role / Device Role / Timing Role: Enters HIBERNATE mode (<8 µA) between host accesses; wakes on I²C command or BIN event. Use Value: Extends standby time by >5× versus always-on gauging while preserving SOC history across deep sleep. |
Use Scenario: Rugged field device operating in –20°C to 60°C environments with removable battery packs. IC Role / Device Role / Timing Role: Detects battery insertion/removal via BIN pin; reports temperature-compensated SOC using internal sensor or host input. Use Value: Eliminates need for mechanical switch detection and enables hot-swap battery replacement with seamless SOC continuity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fuel gauging applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ27426YZFT-G2A | Same package and pinout; adds HDQ interface alongside I²C; firmware version 2.06 vs 2.05 | Supports dual-interface systems (I²C + HDQ); required where legacy HDQ host exists | Choose if HDQ compatibility or newer firmware features (e.g., enhanced chem ID handling) are needed |
| BQ27441YZFT-G1A | Same Impedance Track™ engine but no integrated sense resistor; requires external 10–20 mΩ shunt | Used where higher current sensing (>3.5 A peak) or custom shunt placement is required | Choose when design demands external current sensing flexibility or higher current capability beyond 3.5 A |
Compared with BQ27425YZFT-G2A, the BQ27426YZFT-G2A offers interface redundancy without changing layout, while the BQ27441YZFT-G1A trades integrated sensing for shunt customization-making the BQ27425YZFT-G2A optimal for space-constrained, cost-sensitive single-cell Li-ion systems needing minimal external components.
Availability
BQ27425YZFT-G2A is available at Aetrix Electronics and suitable for smartphone power management, tablet battery monitoring, and handheld industrial terminal designs requiring stable component supply, long-term lifecycle support, and production-ready fuel gauging accuracy.
Supply support for BQ27425YZFT-G2A 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-G2A belongs to TI's Impedance Track™ fuel gauge product line, designed specifically for system-side, single-cell Li-ion battery state estimation in space-constrained portable electronics.
FAQ
What battery chemistries does the BQ27425YZFT-G2A support?
The BQ27425YZFT-G2A supports LiCoO₂ (CHEM_ID = 0x128) and LiMn₂O₄ (CHEM_ID = 0x312) single-cell batteries, as confirmed in the Device Comparison Table. It uses chemistry-specific OCV tables and aging models within the Impedance Track™ algorithm to maintain accuracy across both types without hardware changes.
Does the BQ27425YZFT-G2A require an external sense resistor?
No, the BQ27425YZFT-G2A includes an integrated 10 mΩ sense resistor between SRX and VSS. This eliminates the need for an external shunt, reduces PCB area, and avoids thermal drift errors associated with discrete resistors-enabling direct connection to the battery PACK– terminal.
How does the BQ27425YZFT-G2A handle battery insertion and removal detection?
The BQ27425YZFT-G2A uses the BIN pin for battery presence detection. When enabled via [BIE] bit, it detects insertion via logic high-to-low transition (or pullup-based detection) and automatically enters NORMAL mode to begin gauging-ensuring accurate state tracking starts only after valid battery connection.
What are the power modes of the BQ27425YZFT-G2A and their current consumption?
The BQ27425YZFT-G2A operates in five modes: NORMAL (118 µA), SLEEP (23 µA), HIBERNATE (8 µA), SHUTDOWN (1 µA), and INITIALIZATION (transient). Mode transitions are automatic or host-controlled via CE pin and register settings, enabling optimized power trade-offs for different usage phases.
Can the GPOUT pin on the BQ27425YZFT-G2A be used for both battery-low warning and SOC interrupts?
Yes-the GPOUT pin is configurable via the Operation Configuration register. When [BATLOWEN] = 1, it functions as a battery-low indicator synchronized to the [SOC1] flag; when cleared, it delivers 1-ms pulses at user-defined SOC intervals (e.g., every 1% or 10%) for host-triggered state updates.
BQ27425YZFT-G2A 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-G2A FAQ
1.How can I place an order for BQ27425YZFT-G2A through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ27425YZFT-G2A 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-G2A reliable?
The price and inventory of BQ27425YZFT-G2A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ27425YZFT-G2A is usually 5 days.
3.What payment methods are accepted for BQ27425YZFT-G2A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ27425YZFT-G2A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ27425YZFT-G2A?
BQ27425YZFT-G2A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ27425YZFT-G2A 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-G2A?
For technical support, including BQ27425YZFT-G2A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ27425YZFT-G2A requirements.
6.How does Aetrix verify that BQ27425YZFT-G2A is sourced from the original manufacturer or authorized distributors?
All BQ27425YZFT-G2A 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-G2A meets industry standards.
7.What is the process for return or replacement of BQ27425YZFT-G2A?
All BQ27425YZFT-G2A units undergo pre-shipment inspection (PSI). If there is an issue with BQ27425YZFT-G2A, 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-G2A part is unused and in its original packaging.
Return procedure for BQ27425YZFT-G2A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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