LG KE990 Service Manual - Page 41

3. TECHNICAL BRIEF Constant Current Charging The PM6635 IC supports constant current charging of the main battery by controlling the charger pass transistor and the battery transistor. The constant current charging continues until the battery reaches its target voltage, 4.2V. Constant Voltage Charging Constant voltage charging begins when the battery voltage reaches a target voltage, 4.2V. The end of constant voltage charging is commonly detected 10% of the full charging current. • Charging Method : CC & CV (Constant Current & Constant Voltage) • Maximum Charging Voltage : 4.2V • Maximum Charging Current : 600mA • Nominal Battery Capacity : 1000mAh • Charger Voltage : 5.1V • Charging time : Max 3h (Except time trickle charging) • Full charge indication current (icon stop current) : 100mA • Low battery POP UP : Idle - 3.49V, Dedicated(GSM/WCDMA) - 3.49V • Low battery alarm interval : Idle - 3 min, Dedicated - 1min • Cut-off voltage : 3.20V(idle), 3.1V(call) LGE Internal Use Only - 42 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes