ISL9203R5220

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 1.5A
• Charge Current Thermal Foldback
• Accepts Multiple Types of Adapters
• Guaranteed operation down to VIN = 2.65V after start up
• Ambient Temperature Range: -20°C to 70°C
• Thermally-Enhanced DFN Packages
• Pb-Free Plus Anneal Available (RoHS Compliant)




Application

• 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




Pinout






Specifications

Supply Voltage (VIN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to 7V
Output Pin Voltage (BAT, VSEN, V2P8). . . . . . . . . . . . . . -0.3 to 5.5V
Signal Input Voltage (TIME, IREF). . . . . . . . . . . . .. . . . . -0.3 to 3.2V
Output Pin Voltage (STATUS) . . . . . . . . . . . . . . . . . . . . . . -0.3 to 7V
Charge Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . 1.6A
ESD Rating
Human Body Model (Per MIL-STD-883 Method 3015.7) .. . . ..4500V
Machine Model (Per EIAJ ED-4701 Method C-111) . . . . . . .. . .200V




Description

The ISL9203R5220 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 withvarious types of AC adapters.

The ISL9203R5220 operates as a linear charger when the AC adapter is a voltage source. The battery is charged in aCC/CV (constant current/constant voltage) profile. The charge current is programmable with an external resistor up to 1.5A. The ISL9203R5220 can also work with a current-limited adapter to minimize the thermal dissipation, in which case the ISL9203R5220 combines the benefits of both alinear charger and a pulse charger.

The ISL9203R5220 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 and thermally enhanced DFN package.