DESCRIPTION

The UTC UB291 is a series of lithium-ion/lithium-polymer

rechargeable battery protection ICs incorporating high accuracy

voltage detection circuits and delay circuits.

The UTC UB291 is suitable for protection of single cell lithium-ion /

lithium polymer battery packs from overcharge, over discharge and

over current.

The ultra-small package and less required external components

make it ideal to integrate the UTC UB291 into the limited space of

battery pack.

FEATURES

* Wide Supply Voltage Range: VDD=1.5V~10V

* Ultra-Low Quiescent Current: IOPE=3.0μA (VDD=3.9V)

* Ultra-Low Power-Down Current: IPDN=0.2μA (VDD=2.0V)

* Overcharge Detection Voltage: VDET1=4.05V~4.35V

* Overcharge Release Voltage: VREL1=3.8V~4.25V

* Over Discharge Detection Voltage: VDET2=2.2V~3.1V

* Over Discharge Release Voltage: VREL2=2.3V~3.3V

* Discharge Over Current Detection Voltage: VDET3=0.07V~0.23V

* Discharge Short Circuit Detection Voltage: VSHORT=0.5V

* Charge Over Current Voltage: VDET4=-0.1V

* Charger Detection Voltage: VCHA=-0.7V

* Delay Times are Generated by an Internal Circuit. (External Capacitors are Unnecessary.)