UB2421 Description
UTC UB2421 is a lithium-ion / lithium-polymer rechargeable battery protection IC incorporating high accuracy voltage detection circuits and delay circuits. It is suitable for protection of single cell lithium-ion / lithium polymer battery packs from overcharge, over discharge and over current. The tiny package required external few ponents make the UTC UB2421 be able to be applied to space limited battery pack.
UB2421 Key Features
- Wide supply voltage range: VDD=1.8V~6.5V
- Ultra-low quiescent current: IDD=3.0μA (VDD=3.5V)
- Ultra-low power-down current: IPD=0.2μA (VDD=2.0V)
- Overcharge detection voltage: VOCU=4.30V±0.05V
- Overcharge release voltage: VOCR=4.10V±0.05V
- Overdischarge release voltage: VODL=2.40V±0.10V
- Overdischarge release voltage: VODR=3.00V±0.10V
- Over current detection voltage: VOI1=0.15V±0.05V
- Short circuit detection voltage: VOI2=1.35V (Fixed)
- Charger detection voltage: VCH=-0.7V