调节 恒定电流和恒定电压 锂电池充电管理IC 解决方案
DESCRIPTIONThe 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
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