DESCRIPTION

The AP6067 is a constant current, constant voltage Li-Ion battery charger controller that uses a current mode PWM step-down (buck) switching architecture. With a 500kHz switching frequency, the AP6067 provides a small, simple and efficient solution to fast charge one (4.2V) or two (8.4V) cell lithium-ion batteries. The AP6067 charges the battery in three phases: conditioning, constant current, and constant voltage. An external sense resistor sets the charge current with ±10% accuracy. An internal resistor divider and precision reference set the final float voltage to 4.2V per cell with ±

1% accuracy. An internal comparator detects the near end-of-charge condition while an internal timer sets the total charge time and terminates the charge cycle. The AP6067 automatically re-starts the charge if the b attery voltage falls below an internal threshold, 4.05V per cell. The AP6067 also automatically enters sleep mode wh en DC supplies are removed. The AP6067 is available in the 8-lead SOP and 10-l ead TDFN packages.  

FEATURES

 Wide Input Supply Voltage Range: 4.8V to 20V – 4.2 Version 8.9V to 20V – 8.4 Version 8.9V to 20V – 8.4A Version

 500kHz Switching Frequency

 End-of-Charge Current Detection Output

 7 Hour Charge Termination Timer

 ±1% Charge Voltage Accuracy

 ±10% Charge Current Accuracy

 Low 10?A Reverse Battery Drain Current

 Automatic Battery Recharge

 Automatic Trickle Charging of Low Voltage Batteries

 Automatic Sleep Mode for Low Power Consumption

 Battery Temperature Sensing

 Stable with Ceramic Output Capacitor

 Support up to 3A Charge Current

 8-Lead SOP and 10-Lead TDFN Packages

 RoHS Compliant and 100% Lead (Pb)-Free Halogen-Free

APPLICATIONS

 Small Notebook Computer

 Portable DVD

 Handheld Instruments