Gas Gauge/Protection Li-Ion 20-Pin TSSOP T/R

The bq28400 device is a fully integrated gas gauge and analog monitoringmanagement 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. 

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 ExternalComponents 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