UNISONIC TECHNOLOGIES CO.
, LTD UB244A
Preliminary
CMOS IC
LI-ION BATTERY PROTECTION IC FOR 1-CELL TO 4-CELL PACK (SECONDARY PROTECTION)
DESCRIPTION
The UTC UB244A Series is secondary protection IC for 1-, 2-, 3-, or 4-Cell lithium-ion rechargeable battery packs, and incorporates a high-accuracy
voltage detection circuit.
The UTC UB244A Series also includes a high accuracy delay circuit for over
voltage detection time can be set by an external capacitor.
FEATURES
* High-accuracy
voltage detection circuit for each cell * Overcharge detection
voltage n (n=1 to 4): 4.
05V to 4.
50V (in 50mV steps) * Overcharge hysteresis
voltage n (n=1 to 4): 0.
38V±0.
10V, 0.
25V±0.
07V, 0.
13V±0.
04V, 0.
045V±...