AF5918 One Cell Lithium-ion/Polymer Battery Protection IC
General Description:
The AF5918 battery protection IC is designed to protect lithium-ion/polymer battery from damage or degrading the lifetime due to overcharge, overdischarge, and/or overcurrent for one-cell lithium-ion/polymer battery powered systems, such as cellular phones.
The ultra-small package and less required external components make it ideal to integrate the AF5918 into the limited space of battery pack. The accurate ±50mV overcharging detection voltage ensures safe and full utilization charging. The very low standby current drains little current from the cell while in storage.
Features:
■ Reduction in Board Size due to Miniature Package SOT23-6.
■ Ultra-Low Quiescent Current at 4μA (Vcc=3.9V).
■ Ultra-Low Power-Down Current at 0. 2μA (Vcc=2.0V).
■ Precision Overcharge Protection Voltage 4.3V ± 50mV
■ Load Detection Function during Overcharge Mode.
■ Two Detection Levels for Overcurrent Protection.
■ Delay times are generated by internal circuits.
■ No external capacitors required.
Applications:
Protection IC for One-Cell Lithium-Ion/Lithium-Polymer Battery Pack