XB4908A

The XB4908 SERIES product is a high integration solution for lithium-ion/polymer battery protection. It contains advanced power MOSFET, high-accuracy voltage detection circuits and delay circuits. It is put into an ultra-small ESN4 package and only one external component makes it an ideal solution in limited space of battery pack. XB4908 SERIES has all the protection functions required in the battery application including overcharging, over-discharging, overcurrent and load short circuiting protection etc. The accurate overcharging detection voltage ensures safe and full utilization charging. The low standby current drains little current from the cell while in storage. The device is not only targeted for digital cellular phones, but also for any other Li-Ion and Li-Poly battery-powered information appliances requiring long-term battery life.

Applications

• One-Cell Lithium-ion Battery Pack
• Lithium-Polymer Battery Pack

Key features

• Protection of Charger Reverse Connection
• Protection of Battery Cell Reverse Connection Without external load
• Integrated Advanced Power MOSFET with Equivalent of 13.5 mΩ RSS(ON)
• Ultra-small ESN4 Package
• Only One External Capacitor Required
• Over-temperature Protection
• Overcharge Current Protection
• Two-step Overcurrent Detection
• Over-discharge Current
• Load Short Circuiting
• Low Current Consumption
• Operation Mode: 3.3 μA typ
• Power-down Mode: 1.8 μA typ
• Charger Detection Function
• 0V Battery Charging Function
• Delay Times are generated inside
• High-accuracy Voltage Detection
• RoHS Compliant and Lead (Pb) Free