My Inquiry
My Account
Texas Instruments BQ27532YZFT-G1
- Part No.:
- BQ27532YZFT-G1
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 15-UFBGA, DSBGA
- Datasheet:
-
BQ27532YZFT-G1.pdf
- Description:
- IC BATT FUEL GAUGE LIION 15DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:509
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BQ27532YZFT-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, 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 with minimal host firmware overhead is required.
For engineers reviewing the BQ27532YZFT-G1 datasheet, BQ27532YZFT-G1 pinout, BQ27532YZFT-G1 application, or BQ27532YZFT-G1 equivalent, key selection criteria include its 15-pin NanoFree™ CSP package, coulomb counter resolution (14–15 bits), sleep-mode current (23 µA), integrated 2.5-V LDO, and support for temperature-compensated multi-level charging profiles with bq2425x.
Technical Context
The BQ27532YZFT-G1 implements TI's patented Impedance Track™ algorithm to model battery discharge curves in real time, dynamically adjusting for aging, self-discharge, temperature, and rate inefficiencies. Its dual ADC architecture includes a 14–15-bit integrating ADC for coulomb counting (SRP/SRN inputs) and a separate 14–15-bit ADC for cell voltage (BAT) and thermistor (TS) measurements.
It features autonomous power mode transitions-NORMAL, SLEEP, SLEEP+, HIBERNATE, and BAT INSERT CHECK-governed by current thresholds and I/O events. The device integrates a 2.5-V LDO (VCC output), dual oscillators (8.389 MHz HFO and 32.768 kHz LFO), and I²C slave interface with open-drain SDA/SCL and push-pull BSDA/BSCL for direct communication with bq2425x chargers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | VREGIN = 2.8 V to 4.5 V; powers internal LDO only-no external load capability on VCC |
| Coulomb Counter Resolution | 14–15 bits; enables sub-1-mAh remaining capacity accuracy over 14,500-mAh battery capacity |
| I²C Interface Speed | 400 kHz; supports fast host polling without requiring additional level-shifting circuitry |
| Sense Resistor Range | 5 mΩ to 20 mΩ; allows low-power, high-accuracy current sensing with minimal board space impact |
| Operating Temperature | –40°C to +85°C; validated for smartphone and tablet thermal environments including battery proximity |
| Power Modes | NORMAL (118 µA), SLEEP+ (62 µA), SLEEP (23 µA), HIBERNATE (8 µA); enables adaptive energy management across usage states |
| Data Flash Endurance | 20,000 write cycles with 10-year data retention; supports field-updatable battery profile calibration |
Pinout & Package
Package: 15-pin NanoFree™ CSP (YZF), 2.61 mm × 1.96 mm, 0.5-mm pitch - optimized for ultra-thin mobile PCBs with minimal footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BAT | Cell voltage measurement input | ADC input for battery OCV and loaded voltage; max 4.8 V for accuracy |
| BI/TOUT | Battery insertion detection & thermistor bias | Provides pullup for NTC network; also controls thermistor multiplexer; requires >1 MΩ external pullup |
| BSCL / BSDA | bq2425x charger interface clock/data | Push-pull outputs; no external pullups needed; enable direct autonomous charger control |
| CE | Chip enable | Disconnects internal LDO from REGIN when low; ESD diode to REGIN mandates VCE ≤ VREGIN |
| REGIN | LDO input supply | Accepts 2.8–4.5 V; decoupled with 0.1-µF ceramic capacitor to VSS |
| SCL / SDA | I²C slave interface | Open-drain; require 10-kΩ pullup to VCC; support standard/fast-mode I²C up to 400 kHz |
| SOC_INT | State-of-charge interrupt output | Open-drain pulse signal triggered at programmable SOC thresholds (e.g., SOC1) |
| SRN / SRP | Coulomb counter analog inputs | Connect across 5–20 mΩ sense resistor; SRP near PACK–, SRN near VSS; ±0.125 V input range |
| TS | Thermistor voltage sense | ADC input for 10.0 kΩ NTC (e.g., Semitec 103AT); requires 18.2-kΩ pullup between BI/TOUT and TS |
| VCC | LDO regulated output | 2.5 V ±0.2 V at ≤16 mA; decoupled with 1-µF ceramic capacitor; not for external loads |
| VSS | Ground reference | Two pins (C1, C2) provide low-impedance return path for analog and digital circuits |
Key Features
| Feature | Design Value |
|---|---|
| Impedance Track™ Algorithm | Delivers <1% SOC error across battery lifetime by modeling impedance changes due to aging, temperature, and load-no manual recalibration required |
| Autonomous Charger Control | Directly manages bq2425x chargers via BSCL/BSDA interface, enabling multi-level charging (MLC) and temperature-level charging (TLC) without host CPU intervention |
| Integrated 2.5-V LDO | Eliminates need for external regulator; provides clean, stable VCC supply with 2.3–2.6 V output across input range and load conditions |
| Multi-Mode Power Management | Five configurable power modes (including BAT INSERT CHECK) reduce average system current-SLEEP mode draws only 23 µA while maintaining periodic gauging |
| On-Chip Data Flash | Stores battery profiles, calibration data, and design parameters with 10-year retention and 20,000 write cycles-supports field updates during device lifecycle |
Applications
| Smartphones | Tablets |
|---|---|
Use Scenario: Embedded non-removable Li-ion battery in slim-profile handset with tight thermal constraints and aggressive runtime targets. IC Role / Device Role / Timing Role: System-side fuel gauge and charger coordinator; performs real-time SOC estimation and triggers bq2425x charge termination based on impedance-derived full-charge capacity. Use Value: Enables <1% SOC error across 500+ charge cycles and extends usable runtime by optimizing recharge thresholds and discharge cutoffs per actual battery health. | Use Scenario: Removable battery pack in Android-based tablet requiring accurate remaining runtime prediction under variable screen brightness and processor load. IC Role / Device Role / Timing Role: Host-independent battery monitor interfacing via I²C; measures voltage, temperature, and current to compute runtime-to-empty (RTE) and state-of-health (SoH). Use Value: Delivers precise RTE estimates (<5 min error) by compensating for temperature-induced capacity loss and aging-related Qmax decay using on-device Impedance Track™ modeling. |
| Digital Cameras | Handheld Terminals |
Use Scenario: High-drain DSLR-style camera with burst-mode operation causing rapid current transients and thermal gradients across the battery cell. IC Role / Device Role / Timing Role: Coulomb-counting fuel gauge with fast ADC sampling; uses SRP/SRN inputs to capture transient current spikes and correct SOC drift in real time. Use Value: Maintains SOC accuracy within ±2% during burst shooting by leveraging 1-s coulomb counter conversion time and 15-bit resolution to resolve sub-mA integration errors. | Use Scenario: Ruggedized industrial handheld terminal operating in wide ambient temperatures (–20°C to +60°C) with infrequent but critical battery status reporting requirements. IC Role / Device Role / Timing Role: Low-power battery manager in SLEEP+ mode; wakes on I²C poll or SOC_INT event to report SoH and remaining capacity without host CPU scheduling. Use Value: Achieves 6-month shelf life on single charge via 62-µA SLEEP+ mode and autonomous wake-on-interrupt-eliminates periodic polling overhead and extends standby duration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery fuel gauging applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ27510G3YZFT | 12-bit coulomb counter; no integrated charger control interface; supports only I²C (no BSCL/BSDA); smaller 12-pin CSP package | Targeted at cost-sensitive, host-managed charging systems without bq2425x; lacks autonomous MLC/TLC capability | Select when charger control is handled by host MCU and board space is more constrained than performance requirements |
| BQ27426YZFT | Same 15-pin YZF package; 14-bit coulomb counter; supports I²C only; no BSCL/BSDA; lower max battery capacity (8,000 mAh vs. 14,500 mAh) | Designed for mid-tier portable devices with simpler charging profiles; lacks temperature-level charging (TLC) and SoH-based adaptation | Choose for legacy designs migrating from BQ27425 or where Impedance Track™ is needed but bq2425x integration is unnecessary |
Compared with BQ27510G3YZFT and BQ27426YZFT, the BQ27532YZFT-G1 uniquely combines high-resolution gauging (14–15-bit ADC), autonomous bq2425x control, and full Impedance Track™ adaptation-including aging compensation and multi-level charging-making it optimal for premium smartphones and tablets requiring longest runtime and highest SOC fidelity.
Availability
BQ27532YZFT-G1 is available at Aetrix Electronics and suitable for smartphones, tablets, and handheld terminals requiring stable component supply, long-term lifecycle support, and validated battery management performance across temperature and aging conditions.
Supply support for BQ27532YZFT-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 leader delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and consumer applications.
The BQ27532YZFT-G1 belongs to TI's Battery Management Unit product line, engineered specifically for system-side fuel gauging and intelligent charging control in space-constrained, single-cell Li-ion portable electronics.
FAQ
What is the primary function of the BQ27532YZFT-G1 in a battery management system?
The BQ27532YZFT-G1 serves as a system-side battery management unit that performs high-accuracy fuel gauging using TI's Impedance Track™ algorithm and autonomously controls bq2425x switch-mode chargers. It measures cell voltage, temperature, and current via dedicated ADCs and coulomb counter inputs to report remaining capacity, state-of-charge, runtime-to-empty, and state-of-health-all while minimizing host processor involvement. The BQ27532YZFT-G1 is not a standalone charger IC but a fuel gauge with integrated charger coordination logic.
Does the BQ27532YZFT-G1 require an external sense resistor, and what value range is supported?
Yes, the BQ27532YZFT-G1 requires an external current-sense resistor connected between SRP and SRN pins. It supports values from 5 mΩ to 20 mΩ, with typical implementations using 10 mΩ. This low-value resistor minimizes power loss and board area while enabling accurate coulomb counting-the device's integrating ADC accepts ±0.125 V differential input, corresponding to ±12.5 A at 10 mΩ. The BQ27532YZFT-G1 does not include an internal sense element and relies entirely on this external precision resistor for current measurement.
Can the BQ27532YZFT-G1 operate without a bq2425x charger, and how is charging controlled in that case?
Yes, the BQ27532YZFT-G1 can operate without a bq2425x charger. In such configurations, it functions as a pure fuel gauge: it reports battery parameters (SOC, voltage, temperature, SoH) via I²C and can suggest charge voltage/current values to the host MCU, which then controls an external charger. The BQ27532YZFT-G1 does not generate charging signals natively outside the bq2425x interface (BSCL/BSDA). Autonomous charger control is exclusive to the bq2425x family; for other chargers, the host must interpret BQ27532YZFT-G1 data and manage charging policy externally.
What are the power consumption characteristics of the BQ27532YZFT-G1 in different operating modes?
The BQ27532YZFT-G1 offers five power modes: NORMAL (118 µA), SLEEP+ (62 µA), SLEEP (23 µA), HIBERNATE (8 µA), and BAT INSERT CHECK (low-power halted state). Current draw is measured at TA = 25°C and VREGIN = 3.6 V. SLEEP mode disables the high-frequency oscillator and performs periodic measurements; SLEEP+ retains the HFO for faster wake response. All modes maintain flash memory integrity and retain calibrated battery data. The BQ27532YZFT-G1 automatically transitions between modes based on current thresholds and I/O activity, enabling optimized energy use across usage scenarios.
How does the BQ27532YZFT-G1 handle battery temperature measurement, and what thermistor specifications are recommended?
The BQ27532YZFT-G1 supports both external NTC thermistors and its internal temperature sensor. For external sensing, TI specifies a 10.0 kΩ ±1% NTC with B25/85 = 3435 K ±1%, such as the Semitec 103AT. A 18.2-kΩ pullup resistor between BI/TOUT and TS pins is required. The TS pin connects to the thermistor network and feeds a dedicated 14–15-bit ADC. Temperature data is used for Impedance Track™ modeling, charge profile adaptation (e.g., TLC), and safety limits. Internal sensing is less accurate and intended for coarse monitoring only; external thermistors deliver ±1°C accuracy across –40°C to +85°C.
BQ27532YZFT-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
BQ27532YZFT-G1 FAQ
1.How can I place an order for BQ27532YZFT-G1 through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ27532YZFT-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 BQ27532YZFT-G1 reliable?
The price and inventory of BQ27532YZFT-G1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ27532YZFT-G1 is usually 5 days.
3.What payment methods are accepted for BQ27532YZFT-G1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ27532YZFT-G1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ27532YZFT-G1?
BQ27532YZFT-G1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ27532YZFT-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 BQ27532YZFT-G1?
For technical support, including BQ27532YZFT-G1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ27532YZFT-G1 requirements.
6.How does Aetrix verify that BQ27532YZFT-G1 is sourced from the original manufacturer or authorized distributors?
All BQ27532YZFT-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 BQ27532YZFT-G1 meets industry standards.
7.What is the process for return or replacement of BQ27532YZFT-G1?
All BQ27532YZFT-G1 units undergo pre-shipment inspection (PSI). If there is an issue with BQ27532YZFT-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 BQ27532YZFT-G1 part is unused and in its original packaging.
Return procedure for BQ27532YZFT-G1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BQ27532YZFT-G1 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…
