UB2012 データシートの表示（PDF） - Unisonic Technologies

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UB2012

ADVANCED LINEAR CHARGE MANAGEMENT IC FOR SINGLE AND TWO-CELL LITHIUM-ION AND LITHIUM-POLYMER

Unisonic Technologies 

UB2012

 APPLICATION INFORMATION(Cont.)

LINEAR INTEGRATED CIRCUIT

Preconditionin

g Phase

Current Regulation

Phase

Voltage Regulation and

Charge Termination Phase

Regulation Voltage

Regulation Current

Minimum Charge

Voltage

Preconditioning

and Taper Detect

Fig. 3 Typical Charge Profile

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.

UNISONIC TECHNOLOGIES CO., LTD

www.unisonic.com.tw

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