UB2012BG-S08-R datasheet(8/17 Pages) UTC

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UB2012

LINEAR INTEGRATED CIRCUIT

UNISONICTECHNOLOGIESCO.,LTD

8 of 17

www.unisonic.com.tw

QW-R121-018 .G



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

is affected by battery temperature and voltage. If the battery temperature is out of the VTS1 to VTS2 range; the UTC

UB2012

will suspend charge. In addition, if the battery voltage is below the precharge threshold V(MIN), the UTC

UB2012

uses precharge to condition the battery. The conditioning charge rate I(PRECHG) is set at approximately 10%

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.

UB2012BG-S08-R Fiches technique(PDF) 8 Page - Unisonic Technologies