调节 恒定电流和恒定电压 锂电池充电管理IC 解决方案

SW18923706103

  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 10μA 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