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UB2012XG-S08-T Datasheet(PDF) 8 Page - Unisonic Technologies |
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UB2012XG-S08-T Datasheet(HTML) 8 Page - Unisonic Technologies |
8 / 17 page UB2012 Preliminary LINEAR INTEGRATED CIRCUIT UNISONICTECHNOLOGIESCO.,LTD 8 of 17 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 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. |
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