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Texas Instruments BQ27532YZFR-G1
- Part No.:
- BQ27532YZFR-G1
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 15-UFBGA, DSBGA
- Datasheet:
-
BQ27532YZFR-G1.pdf
- Description:
- IC BATT FUEL GAUGE LIION 15DSBGA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
BQ27532YZFR-G1 from Texas Instruments is a system-side battery management unit (BMU) for single-cell Li-ion battery packs, integrating Impedance Track™ fuel gauging and autonomous charger control for bq2425x switch-mode chargers. It delivers <1% state-of-charge (SOC) error across operating conditions, supports 5–20 mΩ sense resistors, operates from –40°C to +85°C, and interfaces via 400-kHz I²C. It is deployed in smartphones and tablets where embedded or removable battery monitoring and intelligent charging are required.
For engineers reviewing the BQ27532YZFR-G1 datasheet, BQ27532YZFR-G1 pinout, BQ27532YZFR-G1 application, or BQ27532YZFR-G1 equivalent, key selection considerations include its 15-pin NanoFree™ CSP package, coulomb counter resolution (14–15 bits), 23 μA sleep-mode current, integrated 2.5-V LDO regulator, and support for temperature-compensated multi-level charging profiles with bq2425x.
Technical Context
The BQ27532YZFR-G1 implements TI's patented Impedance Track™ algorithm to model battery discharge curves, dynamically adjusting for aging, self-discharge, and temperature/rate inefficiencies. It performs real-time voltage (BAT), temperature (TS), and current sensing (SRP/SRN) using dual ADCs - one 14–15-bit for cell/thermistor measurements (125-ms conversion), another 14–15-bit integrating ADC for coulomb counting (1-s conversion, ±10 μV offset).
It features autonomous power mode management (NORMAL, SLEEP+, SLEEP, HIBERNATE, BAT INSERT CHECK) with automatic transitions based on load current and communication activity. Its I²C slave interface (400 kHz, open-drain SDA/SCL) enables host processor interaction, while dedicated BSDA/BSCL pins provide direct control of bq2425x chargers without host intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.45 V to 4.5 V on REGIN; powers internal 2.5-V LDO (VCC) for core logic only |
| Fuel Gauging Accuracy | <1% SOC error across lifetime and temperature due to Impedance Track™ modeling |
| Coulomb Counter Resolution | 14–15 bits with ±10 μV input offset; supports 5–20 mΩ sense resistor for high-precision charge integration |
| I²C Interface Speed | 400 kHz maximum clock frequency; open-drain SDA/SCL with 10-kΩ pullups required |
| Operating Temperature | –40°C to +85°C ambient; validated for smartphone and tablet thermal environments |
| Power Modes | NORMAL (118 μA), SLEEP+ (62 μA), SLEEP (23 μA), HIBERNATE (8 μA), BAT INSERT CHECK |
| Data Flash Endurance | 20,000 write cycles with 10-year data retention for calibration and configuration storage |
Pinout & Package
The BQ27532YZFR-G1 is housed in a 15-pin NanoFree™ CSP (YZF) package measuring 2.61 mm × 1.96 mm with 0.5-mm pitch, optimized for ultra-compact mobile designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BAT | Analog input | Cell voltage measurement (ADC input); max 4.8 V for accuracy; high-impedance (8 MΩ) when idle |
| BI/TOUT | IO / Power | Battery insertion detection; thermistor network power; thermistor multiplexer control; requires >1 MΩ pullup |
| BSCL / BSDA | Output / IO | Dedicated push-pull clock/data lines for direct bq2425x charger control; no external pullups needed |
| CE | Digital input | Chip enable; disconnects internal LDO from REGIN when low; ESD diode to REGIN requires VCE ≤ VREGIN |
| REGIN | Power input | LDO input; decoupled with 0.1-μF ceramic capacitor to VSS; range 2.45–4.5 V |
| SCL / SDA | Input / IO | I²C slave interface (open-drain); require 10-kΩ pullups to VCC; support 400-kHz operation |
| SOC_INT | IO output | Open-drain interrupt signaling SOC threshold events; configurable pulse per SLUUB04 TRM |
| SRN / SRP | Analog input | Coulomb counter inputs across sense resistor; differential range ±0.125 V; 2.5-MΩ effective input resistance |
| TS | Analog input | Thermistor voltage sense (103AT-type NTC); ADC input with –2 mV/°C gain; 8-MΩ input impedance |
| VCC | Power output | 2.5-V LDO output; decoupled with 1-μF ceramic capacitor to VSS; not for external loads |
| VSS | Power ground | Device ground reference; two pins (C1, C2) for low-impedance return path |
Key Features
| Feature | Design Value |
|---|---|
| Impedance Track™ Fuel Gauging | Models battery impedance in real time to deliver <1% SOC error across aging, temperature, and load variations |
| bq2425x Charger Integration | Direct hardware control via BSDA/BSCL pins eliminates host CPU involvement in charge profile execution |
| Multi-Level Charging (MLC) | Enables adaptive charge voltage/current profiles based on State-of-Health (SoH) and temperature level (TLC) |
| Autonomous Power Management | Five low-power modes (including HIBERNATE at 8 μA) with automatic transitions reduce firmware overhead |
| Integrated 2.5-V LDO Regulator | On-chip regulator powers internal circuitry from 2.45–4.5 V REGIN; eliminates need for external bias supply |
| Nonvolatile Data Flash | 20,000-cycle endurance and 10-year retention for storing calibration data, design capacity, and protection thresholds |
Applications
| Smartphones | Tablets |
|---|---|
Use Scenario: Embedded non-removable Li-ion battery with tight space constraints and requirement for precise runtime estimation. IC Role / Device Role / Timing Role: System-side fuel gauge and charger controller; provides real-time SOC, remaining runtime, and autonomous bq2425x charge sequencing. Use Value: Enables accurate battery status reporting in OS UI and prevents premature shutdown via <1% SOC error and adaptive recharge thresholds. |
Use Scenario: Removable battery pack requiring thermistor-based temperature monitoring and multi-level charging for safety compliance. IC Role / Device Role / Timing Role: Battery management unit interfacing PACK+/PACK–/T connections; manages SoH-aware charge profiles and OCV-based capacity recalibration. Use Value: Extends battery cycle life by adapting charge voltage/current to aging and thermal conditions, validated over 10 years' data flash retention. |
| Digital Cameras | Handheld Terminals |
Use Scenario: Intermittent high-current burst loads (flash, image processing) demanding stable voltage and accurate low-SOC warning. IC Role / Device Role / Timing Role: Coulomb counter with 15-bit resolution and 1-s integration period; triggers SOC_INT interrupt at programmable thresholds. Use Value: Prevents unexpected shutdown during critical capture sequences by delivering reliable low-capacity alerts with ±10 μV offset stability. |
Use Scenario: Industrial handheld with wide ambient temperature range (–40°C to +85°C) and need for long-term calibration stability. IC Role / Device Role / Timing Role: Dual ADC subsystem (14–15-bit) for simultaneous TS/BAT/SRP/SRN sampling; uses internal temp sensor or external 103AT thermistor. Use Value: Maintains <1% SOC accuracy across extreme temperatures using Impedance Track™ modeling and 10-year flash-retained calibration data. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery fuel gauging applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ27426YZFT | Smaller 12-pin CSP (2.15 mm × 1.65 mm); lacks BSDA/BSCL pins; no direct bq2425x control; lower max capacity (8,000 mAh) | Targeted at space-constrained wearables; requires host-controlled charging instead of autonomous bq2425x management | Select when board area is critical and charger control can be handled by MCU; not suitable for bq2425x-integrated systems |
| BQ27510G3YZFT | Same 15-pin YZF package; identical Impedance Track™ engine; no integrated LDO (requires external 2.5-V supply); no BSCL/BSDA | Designed for systems with existing regulated 2.5-V rail; supports same battery configurations but lacks charger co-control capability | Choose when external 2.5-V supply is available and bq2425x integration is unnecessary; retains full fuel gauging accuracy |
Compared with BQ27532YZFR-G1, BQ27426YZFT trades charger autonomy and capacity range for smaller footprint, while BQ27510G3YZFT removes the integrated LDO and charger interface to reduce complexity-both retain Impedance Track™ accuracy but require different system-level power and control architecture decisions.
Availability
BQ27532YZFR-G1 is available at Aetrix Electronics and suitable for smartphones, tablets, and industrial handheld terminals requiring stable component supply, long-term calibration retention, and autonomous battery charging control.
Supply support for BQ27532YZFR-G1 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 leadership in battery management ICs for portable electronics.
The BQ27532YZFR-G1 belongs to TI's Impedance Track™ fuel gauge product line, designed specifically for system-side, single-cell Li-ion battery management with integrated charger control and ultra-low-power operation in space-constrained mobile devices.
FAQ
What is the primary function of the BQ27532YZFR-G1 in a battery management system?
The BQ27532YZFR-G1 serves as a system-side battery management unit that combines high-accuracy Impedance Track™ fuel gauging with autonomous control of bq2425x switch-mode chargers. It measures cell voltage, temperature, and current to compute state-of-charge (SOC), remaining capacity, and runtime-to-empty, while directly managing charge profiles without host processor intervention. This dual functionality makes BQ27532YZFR-G1 essential for smartphones and tablets needing precise battery metrics and safe, adaptive charging.
Does the BQ27532YZFR-G1 require an external sense resistor, and what value range is supported?
Yes, the BQ27532YZFR-G1 requires an external low-value sense resistor between SRP and SRN pins to measure battery current. It supports resistor values from 5 mΩ to 20 mΩ, enabling high-precision coulomb counting with ±10 μV input offset and 14–15-bit resolution. The device's integrating ADC is optimized for this range, ensuring accurate charge/discharge integration even under dynamic load conditions. This specification is confirmed in the BQ27532YZFR-G1 datasheet Section 6.11.
How does the BQ27532YZFR-G1 interface with the bq2425x charger, and is host MCU involvement required?
The BQ27532YZFR-G1 interfaces with the bq2425x charger via dedicated push-pull BSDA and BSCL pins, enabling direct hardware-level communication without host MCU involvement. These pins allow the BQ27532YZFR-G1 to autonomously configure and control charge voltage, current, and termination conditions based on battery SoH and temperature. This architecture reduces software overhead and improves safety-host intervention is optional for advanced configuration but not required for basic charging operation.
What power-saving modes does the BQ27532YZFR-G1 support, and what are their typical current draws?
The BQ27532YZFR-G1 supports five power modes: NORMAL (118 μA), SLEEP+ (62 μA), SLEEP (23 μA), HIBERNATE (8 μA), and BAT INSERT CHECK. Transitions between modes are automatic based on load current and I/O activity, though the host can initiate some modes. The HIBERNATE mode draws just 8 μA, making BQ27532YZFR-G1 suitable for always-on portable devices requiring extended standby time without sacrificing fuel gauging accuracy upon wake-up.
Can the BQ27532YZFR-G1 operate with both embedded and removable battery packs?
Yes, the BQ27532YZFR-G1 is designed to support both embedded (non-removable) and removable single-cell Li-ion battery packs. For removable packs, it uses BAT, P+, P–, and TS connections; for embedded configurations, it connects directly to the battery terminals and system ground. Its BAT INSERT CHECK mode detects pack presence and initializes profiling automatically-confirmed in the BQ27532YZFR-G1 datasheet Section 7.4.2 and Functional Description.
BQ27532YZFR-G1 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
BQ27532YZFR-G1 FAQ
1.How can I place an order for BQ27532YZFR-G1 through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ27532YZFR-G1 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 BQ27532YZFR-G1 reliable?
The price and inventory of BQ27532YZFR-G1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ27532YZFR-G1 is usually 5 days.
3.What payment methods are accepted for BQ27532YZFR-G1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ27532YZFR-G1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ27532YZFR-G1?
BQ27532YZFR-G1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ27532YZFR-G1 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 BQ27532YZFR-G1?
For technical support, including BQ27532YZFR-G1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ27532YZFR-G1 requirements.
6.How does Aetrix verify that BQ27532YZFR-G1 is sourced from the original manufacturer or authorized distributors?
All BQ27532YZFR-G1 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 BQ27532YZFR-G1 meets industry standards.
7.What is the process for return or replacement of BQ27532YZFR-G1?
All BQ27532YZFR-G1 units undergo pre-shipment inspection (PSI). If there is an issue with BQ27532YZFR-G1, 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 BQ27532YZFR-G1 part is unused and in its original packaging.
Return procedure for BQ27532YZFR-G1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BQ27532YZFR-G1 Tags
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