DESCRIPTION
UTC UB2011 used for 1-4 Series Circuit cells charging is designed for portable electronics with lower cost. Its advantages of high-accuracy voltage/current regulation, charging status indication, temperature monitoring. In applications, the battery temperature is continuously under monitor by using an external thermistor, if the temperature is over user-defined threshold; UTC UB2011 inhibits charge for safety concern. UTC UB2011 charges the battery in conditioning, constant voltage and constant current phases. If the battery voltage is lower than the low-voltage threshold, a low current is used for conditioning the battery. After the conditioning phase, the UTC UB2011 applies a constant current that be set by an external sense-resistor to the battery. The sense-resistor can be on the battery without additional components. The constant current phase continues until the battery reaches the charge-regulation voltage, then the constant voltage phase is beginning. Charge stops when the current tapers to the charge termination threshold.
Unisonic Technologies
