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BQ27421YZFR-G1D The Texas Instruments BQ27421YZFR-G1D is a system-side fuel gauge IC designed for single-cell Lithium Ion batteries. It utilizes the Impedance Track™ algorithm for accurate battery monitoring.
Mfr Part #:

BQ27421YZFR-G1D

Available from 3 distributors
Mfr Name: Texas Instruments
Texas Instruments
The Texas Instruments BQ27421YZFR-G1D is a system-side fuel gauge IC designed for single-cell Lithium Ion batteries. It utilizes the Impedance Track™ algorithm for accurate battery monitoring.
✓ Total Stock: 107,497 pcs
$ Price Range: $1.04

BQ27421YZFR-G1D Available from 3 distributors

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✓ Non-Authorised
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Unit Electronics Co.,Limited ✓
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79,105 pcs
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79105 pcs On Request 1 On Request On Request On Request On Request On Request
Romaks Technologies ✓
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23,481 pcs
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23481 pcs On Request 1 On Request On Request On Request On Request On Request
Optech Co.,Limited ✓
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4,911 pcs
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4911 pcs On Request 1 On Request On Request 19 On Request On Request
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BQ27421YZFR-G1D 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
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BQ27421YZFR-G1D Description

Short technical summary and product information.

The BQ27421YZFR-G1D from Texas Instruments is a system-side fuel gauge IC specifically designed for single-cell Li-Ion and Li-Polymer batteries. It employs the patented Impedance Track™ algorithm to provide accurate reporting of remaining capacity and state-of-charge (SOC).

 

This fuel gauge IC supports a wide battery capacity range from 100 mAh to 8000 mAh. It features an integrated sense resistor with a typical value of 7 mΩ, simplifying implementation. The device communicates via an I2C interface, operating within a temperature range of -40°C to 85°C.

 

Designed for system board integration, the BQ27421YZFR-G1D resides on the system board and can power embedded or removable batteries. It offers features such as automatic adjustment for battery aging, self-discharge, temperature, and rate changes, along with battery state-of-health estimation. The package is a 9-DSBGA, suitable for surface mounting.

 

Key specifications include a single-cell configuration, Li-Ion/Li-Polymer chemistry support, and an I2C communication interface. The device is ideal for applications requiring precise battery monitoring and management.

BQ27421YZFR-G1D Quick Information

Product Type: Battery Fuel Gauge IC
Canonical Name: BQ27421YZFR-G1D Single-Cell Li-Ion Battery Fuel Gauge
Subcategory: Power Management

BQ27421YZFR-G1D Compliance

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

BQ27421YZFR-G1D Estimated Pricing

Qty Low High
1+ $1.04 $1.04

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

BQ27421YZFR-G1D Features

  • System-side fuel gauge for single-cell Li-Ion.
  • Impedance Track™ algorithm for accuracy.
  • Supports 100-8000 mAh battery capacities.
  • Integrated 7 mΩ sense resistor.
  • I2C communication interface.

BQ27421YZFR-G1D Applications

  • Accurate battery monitoring in portable devices.
  • Power management for embedded systems.
  • State-of-charge reporting for battery packs.
  • Battery health estimation for longevity.

BQ27421YZFR-G1D FAQs

7 frequently asked questions generated from this part’s specifications.
What type of batteries does the BQ27421YZFR-G1D support?

It supports single-cell Li-Ion and Li-Polymer batteries.

What is the communication interface for this fuel gauge IC?

The communication interface is I2C.

What is the typical operating temperature range?

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

What is the minimum and maximum battery capacity supported?

The supported battery capacity ranges from 100 mAh to 8000 mAh.

What algorithm does the BQ27421YZFR-G1D use for fuel gauging?

It uses the Impedance Track™ algorithm.

What is the value of the integrated sense resistor?

The typical value of the integrated sense resistor is 7 mΩ.

What package type is the BQ27421YZFR-G1D supplied in?

It is supplied in a 9-DSBGA package for surface mounting.

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