BQ28400PWR Datasheet, PDF (1/24 Pages) Texas Instruments – Tablet PC and Netbook 2-Series Cell Li-Ion Battery Gas Gauge and Protection

bq28400
www.ti.com
SLUSA61A – OCTOBER 2010 – REVISED DECEMBER 2010
Tablet PC and Netbook 2-Series Cell Li-Ion Battery Gas Gauge and Protection
Check for Samples: bq28400
FEATURES
1
• 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
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.
T_A
–40°C to 85°C
AVAILABLE OPTIONS
PACKAGE ⁽¹⁾
20-PIN TSSOP (PW) Tube
bq28400PW ⁽²⁾
20-PIN TSSOP (PW) Tape and Reel
bq28400PWR ⁽³⁾
(1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI
website at www.ti.com.
(2) A single tube quantity is 50 units.
(3) A single reel quantity is 2000 units.
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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2010, Texas Instruments Incorporated