UB2012

Preliminary

LINEAR INTEGRATED CIRCUIT

UNISONICTECHNOLOGIESCO.,LTD

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www.unisonic.com.tw

QW-R121-018 .C

APPLICATION INFORMATION(Cont.)

Fig. 3 Typical Charge Profile

Preconditionin

g Phase

Current Regulation

Phase

Voltage Regulation and

Charge Termination Phase

Regulation Current

Regulation Voltage

Minimum Charge

Voltage

Preconditioning

and Taper Detect

QUALIFICATION AND PRECHARGE

When the battery is present and power is applied, the UTC UB2012 starts a charge-cycle. Charge qualification

UB2012

UB2012

of the regulation current, and the conditioning current minimizes heat dissipation in the external pass-element during

the beginning of charge, refer to Fig. 3.