ISL6292

Features:

• Complete Charger for Single-Cell Li-ion Batteries
• Very Low Thermal Dissipation
• Integrated Pass Element and Current Sensor
• No External Blocking Diode Required
• 1% Voltage Accuracy
• Programmable Current Limit up to 2A
• Programmable End-of-Charge Current
• Charge Current Thermal Foldback
• NTC Thermistor Interface for Battery Temperature Monitor
• Accepts Multiple Types of Adapters or USB BUS Power
• Guaranteed to Operate at 2.65V After Start Up
• Ambient Temperature Range: -20°C to 70°C
• Thermally-Enhanced QFN Packages
• Handheld Devices including Medical Handhelds
• PDAs, Cell Phones and Smart Phones
• Portable Instruments, MP3 Players
• Self-Charging Battery Packs
• Stand-Alone Chargers
• USB Bus-Powered Chargers
• Pb-Free Plus Anneal Available (RoHS Compliant)




Pinout






Specifications

Supply Voltage (VIN) . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . -0.3 to 7V
Output Pin Voltage (BAT). . . . . . . . . . . . . . . . . . . . ... . . . -0.3 to 5.5V
Signal Input Voltage (TOEN, TIME, IREF, IMIN) . . ..... . . . -0.3 to 3.2V
Output Pin Voltage (STATUS, FAULT) . . . . . . . . . . . . . ... . . -0.3 to 7V
Charge Current (For 4x4 or 5x5 QFN Packages) . . . . . .... . . . . . 2.1A
Charge Current (For 3x3 DFN Package) . . . . . . . . . . . . ..... . . . . 1.6A




Description

The ISL6292 is an integrated single-cell Li-ion or Li-polymer battery charger capable of operating with an input voltage as low as 2.4V. This charger is designed to work with various types of AC adapters or a USB port. The ISL6292 operates as a linear charger when the AC adapter is a voltage source. The battery is charged in a CC/CV (constant current/constant voltage) profile. The charge current is programmable with an external resistor up to 2A. The ISL6292 can also work with a current-limited adapter to minimize the thermal dissipation, in which case, the ISL6292 combines the benefits of both a linear charger and a pulse charger. The ISL6292 features charge current thermal foldback to guarantee safe operation when the printed circuit board is space limited for thermal dissipation. Additional features include preconditioning of an over-discharged battery, an NTC thermistor interface for charging the battery in a safe temperature range, automatic recharge, and thermally enhanced QFN or DFN packages.