BQ27421YZFT-G1A The Texas Instruments BQ27421YZFT-G1A is a system-side fuel gauge IC for single-cell Lithium Ion batteries. It features an I2C communication interface and an integrated sense resistor.
Mfr Part #:

BQ27421YZFT-G1A

Available from 2 distributors
Mfr Name: Texas Instruments
Texas Instruments
The Texas Instruments BQ27421YZFT-G1A is a system-side fuel gauge IC for single-cell Lithium Ion batteries. It features an I2C communication interface and an integrated sense resistor.
✓ Total Stock: 36,196 pcs
$ Price Range: $1.25

BQ27421YZFT-G1A Available from 2 distributors

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36,160 pcs
36160 pcs On Request 1 On Request On Request On Request On Request On Request
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36 pcs
36 pcs On Request 1 On Request On Request 1410+/1344+ On Request On Request

BQ27421YZFT-G1A Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Battery Chemistry
Function
Interface
Mounting Type
Number of Cells
Operating Temperature
Supplier Device Package
Supplier Package

BQ27421YZFT-G1A Description

Short technical summary and product information.

The BQ27421YZFT-G1A from Texas Instruments is a system-side fuel gauge designed for single-cell Lithium Ion batteries. This IC provides accurate battery monitoring, reporting remaining capacity and state-of-charge (SOC).

 

Key features include an I2C communication interface operating at 400 kHz and an integrated low-value sense resistor (7 mΩ typical). The device supports a wide operating temperature range from -40°C to 85°C. It is housed in a compact 9-DSBGA package and utilizes a Surface Mount mounting type.

 

This fuel gauge is easy to configure and utilizes the Impedance Track™ algorithm to automatically adjust for battery aging, self-discharge, temperature, and rate changes. It also offers battery state-of-health estimation. The BQ27421YZFT-G1A is suitable for embedded or removable battery applications where precise fuel gauging is required.

BQ27421YZFT-G1A Quick Information

Product Type: Fuel Gauge IC
Canonical Name: BQ27421YZFT-G1A System-Side Impedance Track Fuel Gauge
Subcategory: Battery Fuel Gauges

BQ27421YZFT-G1A Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

BQ27421YZFT-G1A Estimated Pricing

Qty Low High
1+ $1.25 $1.25

Estimated market price range - modelled values for guidance only, not live distributor offers.

BQ27421YZFT-G1A Features

  • System-side fuel gauge for single-cell Li-Ion.
  • Integrated low-value sense resistor (7 mΩ typical).
  • I2C communication interface at 400 kHz.
  • Operates from -40°C to 85°C.
  • Compact 9-DSBGA package with surface mount.

BQ27421YZFT-G1A Applications

  • Accurate battery state-of-charge monitoring.
  • Battery health and aging estimation.
  • Power management in portable devices.
  • Embedded and removable battery systems.

BQ27421YZFT-G1A FAQs

6 frequently asked questions generated from this part’s specifications.
What is the operating temperature range for the BQ27421YZFT-G1A?

The operating temperature range is -40°C to 85°C.

What communication interface does the BQ27421YZFT-G1A use?

It uses a 400-kHz I2C serial interface.

What is the typical integrated sense resistor value?

The typical integrated sense resistor value is 7 mΩ.

What battery chemistry is supported by the BQ27421YZFT-G1A?

It supports Lithium Ion battery chemistry.

How many battery cells can the BQ27421YZFT-G1A monitor?

It is designed for single-cell (1-cell) battery configurations.

What package type is the BQ27421YZFT-G1A supplied in?

The BQ27421YZFT-G1A is supplied in a 9-DSBGA package.

BQ27421YZFT-G1A Alternate Parts

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The Texas Instruments BQ27421YZFR-G1A is a system-side fuel gauge IC designed for single-cell Lithium-Ion batteries. It utilizes the Impedance Track™ algorithm for accurate battery monitoring.
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BQ27621YZFT-G1A
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BQ27426YZFT
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