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Product details

Parameters

Cell chemistry Li-Ion/Li-Polymer Number of series cells 2-4 Cells Communication interface SMBus Battery capacity (Min) (mAh) 500 Battery capacity (Max) (mAh) 32000 Implementation Pack Operating temperature range (C) -40 to 85 open-in-new Find other Battery fuel gauges

Package | Pins | Size

TSSOP (PW) 20 42 mm² 6.5 x 6.4 open-in-new Find other Battery fuel gauges

Features

  • Fully Integrated Gas Gauge and Analog Monitoring with Protection in a Single Package
  • 2-Series Cell Li-Ion or Li-Polymer Battery Packs
  • Flexible Memory Architecture with Integrated Flash Memory
  • Zero-Volt and Pre-Charge Mode
  • Full Array of Programmable Protection:
    • OV (Overvoltage)
    • UV (Undervoltage)
    • SC (Short Circuit)
    • OT (Overtemperature)
    • CIM (Cell Imbalance)
  • Accurate CEDV Gauging Algorithm with Self Discharge Compensation
  • High Accuracy Analog Interface with Two Independent ADCs:
    • High Resolution 16-Bit Integrator for Coulomb Counting
    • 16-Bit Delta-Sigma ADC with a 16-Channel Multiplexer for Voltage, Current, and Temperature
  • High Side Protection FET Drive
  • Fully Integrated Internal Clock Synthesizer with No External Components Required
  • Two-Wire SMBus v1.1 Compliant Communications
  • Reduced Power Modes (Typical Battery Pack Operating Range Conditions)
    • Low Power
    • Shutdown
  • 20-Pin TSSOP Package (RoHS-Compliant)
  • JEITA/Enhanced Charging
  • Supports SHA-1 Authentication Responder
  • APPLICATIONS
    • Tablet PCs
    • Slate PCs
    • Netbooks/Notebooks
    • Smartbooks

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Description

The bq28400 device is a fully integrated gas gauge and analog monitoring management solution that provides protection and control for 2-series cell Li-Ion battery packs in a single TSSOP package.

Implementing the optimum balance of quick response analog hardware-based monitoring and control along with an integrated fast CPU provides the ideal pack-based or in-system Li-Ion battery solution. The bq28400 also provides flexible user programmable settings stored in flash memory for control of critical system parameters such as overcurrent, short circuit, under/overvoltage, and over/undertemperature conditions.

The bq28400 communicates with the system host via a two-wire SMBus 1.1 compatible interface, providing high-accuracy reporting and control of battery pack operation. The FET drive and TSSOP package enable a lower cost and small footprint solution along with a simple layout and routing on narrow pack PCBs.

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Technical documentation

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Type Title Date
* Datasheet Tablet PC and Netbook 2-Series Cell Li-Ion Battery Gas Gauge and Protection datasheet (Rev. A) Dec. 22, 2010
Application note Wide-Vin Battery-Charger Using SMBus MSP430 MCUs and bq Fuel Gauges (Rev. B) Jul. 12, 2019
User guide bq28400 INTEGRATED GAS GAUGE and BATTERY PROTECTION MANAGEMENT with SBS TRM Jun. 28, 2011
User guide bq28400 EVM-001 SBS 1.1 Compliant Mar. 01, 2011

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Software development

APPLICATION SOFTWARE & FRAMEWORK Download
Gauging Parameter Calculator for CEDV gauges
GPCCEDV Gauging Parameter Calculator (GPC) is a math calculation and simulation tool that helps the battery designer to obtain matching Compensated End of Discharge Voltage (CEDV) coefficients for the specific battery profile. The tool allows the user to increase the accuracy of the fuel gauge IC over (...)

Design tools & simulation

CALCULATION TOOL Download
document-generic User guide
CAD/CAE SYMBOL Download
SLUC042.ZIP (1031 KB)

CAD/CAE symbols

Package Pins Download
TSSOP (PW) 20 View options

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

Support & training

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