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 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